US20050213483A1 - Recording disc and apparatus and method for reproducing recorded information - Google Patents

Recording disc and apparatus and method for reproducing recorded information Download PDF

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Publication number
US20050213483A1
US20050213483A1 US11/135,396 US13539605A US2005213483A1 US 20050213483 A1 US20050213483 A1 US 20050213483A1 US 13539605 A US13539605 A US 13539605A US 2005213483 A1 US2005213483 A1 US 2005213483A1
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Prior art keywords
recording
identification information
recorded
information
push
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US11/135,396
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Yoshimi Tomita
Tetsuya Iida
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Pioneer Corp
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Pioneer Corp
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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2403—Layers; Shape, structure or physical properties thereof
    • G11B7/24035—Recording layers
    • G11B7/24038—Multiple laminated recording layers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/005—Reproducing
    • G11B7/0053—Reproducing non-user data, e.g. wobbled address, prepits, BCA
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
    • G11B7/00736—Auxiliary data, e.g. lead-in, lead-out, Power Calibration Area [PCA], Burst Cutting Area [BCA], control information
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0901—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following only
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B2007/0003—Recording, reproducing or erasing systems characterised by the structure or type of the carrier
    • G11B2007/0009—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage
    • G11B2007/0013—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage for carriers having multiple discrete layers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0938—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following servo format, e.g. guide tracks, pilot signals
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0945—Methods for initialising servos, start-up sequences

Definitions

  • the present invention relates to a recording disc, and a recorded information reproducing apparatus and method for reproducing recorded information from the recording disc.
  • DVD-ROM is widely used as a read-only optical recording medium which has previously recorded thereon information data such as audio, video, computer data and the like.
  • the DVD-ROM has, for example, a two-layer recording surface comprised of a first recording layer and a second recording layer.
  • a recording pit train carrying information data is formed on a spiral or concentric track.
  • a recording pit train carrying information data is formed on a spiral or concentric track.
  • the recording pits recorded in the first recording layer are hereinafter referred to as the “convex recording pits,” while the recording pits recorded in the second recording layer to the “concave recording pits.”
  • a conventional reproducing apparatus for reproducing recorded information from the DVD-ROM conducts a tracking servo in accordance with a DPD (Differential Phase Detection) scheme.
  • DPD Different Phase Detection
  • reflection from the recording disc irradiated with a beam light is individually received by four photodetectors 20 a - 20 d, arranged in a manner as illustrated in FIG. 1 , which opto-electrically transduce the reflection into read signals Ra-Rd which are used in the tracking control. Then, these read signals Ra-Rd are used in the following calculations to generate a high frequency signal and a diagonal differential signal. The difference in phase between the two signals is used as an error signal for conducting the tracking control:
  • High Frequency Signal Ra+Rb+Rc+Rd
  • Diagonal Differential Signal (Ra+Rc) ⁇ (Rb+Rd)
  • the employment of the DPD scheme results in the satisfactory tracking control both for the first recording layer in which convex recording pits are recorded and for the second recording layer in which concave recording pits are recorded.
  • a writable recording disk such as DVD-R or DVD-RW is previously formed with a recording track which has a wobble pattern corresponding to disc addresses indicative of positions on the disc.
  • a recorded information reproducing apparatus for recording and reproducing information data to and from the DVD-R or DVD-RW reads the wobble pattern on the recording track formed on the recording disc to recognize the position on the disc, while information data is being recorded.
  • a push-pull signal is used for reading the wobble pattern on the recording track.
  • the recorded information reproducing apparatus conducts a tracking servo based on the push-pull signal.
  • the recorded information reproducing apparatus for recording and reproducing information data to and from a recording disc such as DVD-R or DVD-RW acquires disc addresses corresponding to the wobble pattern on the recording track based on the push-pull signal while conducting the tracking control.
  • the conventional recorded information reproducing apparatus which supports any of DVD-R, DVD-RW and DVD-ROM comprises dedicated processing circuits for generating the push-pull signal, high frequency signal and diagonal differential signal, respectively, resulting in an extremely large scale of the apparatus.
  • a recorded information reproducing apparatus which only requires the push-pull signal to conduct the tracking servo for any of DVD-R, DVD-RW and DVD-ROM.
  • the push-pull signal generated when the convex recording pit train is read from the first recording layer of the DVD-ROM as mentioned above is opposite in polarity to the push-pull signal generated when the concave recording pit train is read from the second recording layer.
  • information data is first read from a recording layer intended for reproduction on a trial basis.
  • the polarity of the push-pull signal is reversed, followed by a repetition of the read operation again from the initial position.
  • the read operation may not be immediately started in some cases when the tracking control is conducted using the push-pull signal for a multi-layer recording layer which has a recording layer having a convex recording pit train recorded therein and a recording layer having a concave recording pit train recorded therein, or for a single-layer recording disc on which no recording pits are defined in a convex or concave shape.
  • the present invention has been made to solve the foregoing problem, and it is an object of the invention to provide a recording disc, and an apparatus and method for reproducing recorded information which can permit a reproducing operation to be immediately started for reproducing information data from the recording disc using a push-pull based tracking control.
  • a recording disc for recording information data thereon includes an information data area for recording recording marks carrying the information data in columns, and a control data area for recording identification information indicative of a recording pattern of the recording marks in the information data area.
  • a recorded information reproducing apparatus is configured to reproduce recorded information from a recording disc having an information data area for recording recording marks carrying the information data in columns, and a control data area for recording identification information indicative of a recording pattern of the recording marks in the information data area.
  • the recorded information reproducing apparatus includes a reading component for receiving reflected light from the recording disc irradiated with reading beam light and opto-electrically transducing the reflected light into read signals by at least two photodetectors arranged in a direction perpendicular to a track, push-pull read signal generator for calculating a difference between the read signals generated by the respective photodetectors to output the difference as a push-pull read signal, a tracking servo for biasing the optical axis of the reading light beam in the direction perpendicular to the track based on the push-pull read signal, an identification information reading component for reading the identification information from the control data area, an identifying component for identifying a recording pattern of the recording marks recorded in the information data area based on the identification information, and a polarity reversing component for reversing the polarity of the push-pull read signal in accordance with the result of the identification made by the identifying component.
  • a recorded information reproducing method for reproducing recorded information from a recording disc having an information data area for recording recording marks carrying the information data in columns, and a control data area for recording identification information indicative of a recording pattern of the recording marks in the information data area.
  • the recorded information reproducing method includes a reading step for receiving reflected light from the recording disc irradiated with reading beam light and opto-electrically transducing the reflected light into read signals by at least two photodetectors arranged in a direction perpendicular to a track, a push-pull read signal generating step for calculating a difference between the read signals generated by the respective photodetectors to output the difference as a push-pull read signal, a tracking control step for biasing the optical axis of the reading light beam in the direction perpendicular to the track based on the push-pull read signal, an identification information reading step for reading the identification information from the control data area, an identifying step for identifying a recording pattern of the recording marks recorded in the information data area based on the identification information, and a polarity reversing step for reversing the polarity of the push-pull read signal in accordance with the result of the identification made by the identifying step.
  • a recording disc includes a plurality of recording layers, wherein each recording layer has an information data area for recording recording pits carrying information data in columns, and a control data area for recording a convex/concave identification information indicating with respect to at least one of the recording layers whether each recording pit recorded on each recording layer is convex or concave.
  • a recorded information reproducing apparatus is configured to reproduce recorded information from a recording disc having a plurality of recording layers, wherein each recording layer includes an information data area for recording recording pits carrying information data in columns, and a control data area for recording a convex/concave identification information indicating with respect to at least one of the recording layers whether each recording pit recorded on each recording layer is convex or concave.
  • the recorded information reproducing apparatus includes a reading component for receiving reflected light from the recording disc irradiated with reading beam light and opto-electrically transducing the reflected light into read signals by at least two photodetectors arranged in a direction perpendicular to a track, a push-pull read signal generator for calculating a difference between the read signals generated by the respective photodetectors to output the difference as a push-pull read signal, a tracking servo for biasing the optical axis of the reading light beam in the direction perpendicular to the track based on the push-pull read signal, a convex/concave identification information reading component for reading the convex/concave identification information from the control data area, a convex/concave identifying component for identifying the shape of the recording pits recorded in one of the recording layers from which information is to be reproduced, based on the convex/concave identification information, and a polarity reversing component for reversing the polarity of the
  • a recorded information reproducing method for reproducing recorded information from a recording disc having a plurality of recording layers, wherein each recording layer includes an information data area for recording recording pits carrying information data in columns, and a control data area for recording a convex/concave identification information indicating with respect to at least one of the recording layers whether each recording pit recorded on each recording layer is convex or concave.
  • the recorded information reproducing method includes a push-pull read signal generating step for generating a push-pull read signal based on read signals read from the recording disc, a tracking control step for biasing the optical axis of the reading light beam in a direction perpendicular to a track based on the push-pull read signal, a convex/concave identification information reading step for reading the convex/concave identification information from the recording disc, a convex/concave identifying step for identifying the shape of the recording pits recorded in one of the recording layers from which information is to be reproduced, based on the convex/concave identification information, and a polarity reversing step for reversing the polarity of the push-pull read signal in accordance with the result of the identification made by the convex/concave identifying step.
  • FIG. 1 is a diagram illustrating an exemplary arrangement of photodetectors 20 a - 20 d mounted in a pickup;
  • FIGS. 2A and 2B are diagrams generally illustrating the structure of a recording disc according to the present invention.
  • FIG. 3 is a diagram illustrating a portion of a pattern on the surface of a recording layer of the recording disc according to the present invention
  • FIGS. 4A and 4B are diagrams illustrating concave recording pits and convex recording pits, respectively;
  • FIG. 5 is a diagram generally illustrating the configuration of a master recording apparatus according to the present invention.
  • FIG. 6 is a diagram showing a format for one track in a PEP area 4 ;
  • FIGS. 7A and 7B are diagrams showing the waveforms of phase encoded signals corresponding to one bit length of data
  • FIG. 8 is a diagram illustrating the configuration of a reproducing apparatus according to the present invention.
  • FIG. 9 is a diagram illustrating a subroutine executed by a controller 100 of the reproducing apparatus illustrated in FIG. 8 for acquiring convex/concave identification information;
  • FIG. 10 is a diagram illustrating a subroutine executed by the controller 100 of the reproducing apparatus illustrated in FIG. 8 for setting the polarity of a push-pull read signal;
  • FIG. 11 is a plan view generally showing how areas are defined on a writable recording disc commercially available for general purposes;
  • FIG. 12 is a diagram illustrating a portion of a pattern on the surface of the recording disc illustrated in FIG. 11 ;
  • FIGS. 13A and 13B are diagrams showing exemplary patterns when information data is recorded on a land track LT and when information data is recorded on a groove track, respectively;
  • FIG. 14 is a plan view generally showing how areas are defined on a writable recording disc for authoring.
  • FIG. 15 is a diagram illustrating a portion of a pattern on the surface of the recording disc illustrated in FIG. 14 .
  • FIGS. 2A and 2B generally illustrate an exemplary structure of a recording disc according to the present invention.
  • FIG. 2A is a cross-sectional view of the recording disc.
  • the recording disc comprises a first recording layer RY 1 in which convex recording pits are recorded and a second recording layer RY 2 in which concave recording pits are recorded.
  • Each of these first recording layer RY 1 and second recording layer RY 2 is divided into an information data area 1 , a lead-in area 2 , a lead-out area 3 , and a PEP (phase encoded part) area 4 , as illustrated in FIG. 2B .
  • the PEP area 4 may be provided only in one of the recording layer RY 1 and second recording layer RY 2 .
  • the information data area 1 is an area in which a variety of information data is recorded, such as video, audio, and computer data.
  • the lead-in area 2 in turn is an area in which lead-in data is recorded, including a recorded position, required time for reproduction, disc identification information and the like for each of information data pieces recorded in the information data area 1 .
  • the PEP area 4 in turn is an area in which phase encoded reproduction control data (later described) is recorded, including tracking information, convex/concave identification information and the like.
  • the tracking information refers to such information for specifying a tracking method which should be conducted for reading recorded information from the first recording layer RY 1 and second recording layer RY 2 .
  • the convex/concave identification information refers to such information indicative of whether each of recording pits recorded in the first recording layer RY 1 and second recording layer RY 2 is convex or concave.
  • FIG. 3 is a diagram, viewed from the top surface of the disc, illustrating an exemplary recording pattern in each area of the first recording layer RY 1 (or the second recording layer RY 2 ).
  • the information data area 1 is formed with pit trains comprised of recording pits Pt 1 which carry information data.
  • the lead-in area 2 in turn is formed with pit trains comprised of recording pits Pt 1 which carry the lead-in data.
  • an area WE for recording the disc identification information is formed with a pit train, as illustrated in FIG. 3 , which wobbles in a pattern corresponding to the disc identification information.
  • the PEP area 4 is formed with pit trains comprised of recording pits Pt 2 corresponding to a phase encoded signal which is generated by phase encoded reproduction control data including the convex/concave identification information.
  • each of the recording pits Pt 1 formed in the PEP area 4 has the same recording pit length.
  • each of the recording pits pt 2 is formed on one of a plurality of tracks adjacent to each other such that it is in alignment to the direction perpendicular to the track.
  • each of the recording pits Pt 1 and recording pits Pt 2 is a convex recording pit which protrudes from the disc surface as illustrated in FIG. 4A .
  • each of the recording pits Pt 1 and recording pits Pt 2 is a convex recording pit which recesses into the disc surface, as illustrated in FIG. 4B .
  • the convex/concave identification information forms 2-bit data [ 01 ] indicative of that state in the foregoing embodiment.
  • the convex/concave identification information forms 2-bit data [ 10 ].
  • the convex/concave identification information forms 2-bit data [ 00 ] when convex recording pits are recorded in both the first recording layer RY 1 and second recording layer RY 2 , and forms 2-bit data [ 11 ] when concave recording pits are recorded in both the first recording layer RY 1 and second recording layer RY 2 .
  • FIG. 5 is a diagram illustrating an exemplary configuration of a master recording apparatus for manufacturing a recording disc which has the structure as described above.
  • a master 15 is formed with a resist layer on the surface for creating a resist pattern corresponding to the first recording layer RY 1 (second recording layer RY 2 ).
  • a spindle motor 17 rotates the master 15 at a constant angular velocity.
  • a feed stage 18 moves the master 15 and spindle motor 17 in the radial direction of the master 15 .
  • An electronic beam irradiating apparatus 10 irradiates the surface of the resist layer on the master 15 with an electron beam in accordance with the information data, reproduction control data and lead-in data which have been input for recording on the recording disc.
  • a controller 25 controls the electron beam irradiating apparatus 10 , spindle motor 17 and feed stage 18 to create a resist pattern corresponding to the first recording layer RY 1 and a resist pattern corresponding to the second recording layer RY 2 , respectively.
  • the controller 25 controls the electron beam irradiating apparatus 10 to irradiate an electron beam to an area on the surface of the resist layer corresponding to the information data area 1 as illustrated in FIG. 3 in accordance with information data.
  • the surface of the resist layer is formed with a latent image corresponding to information pits Pt 1 carrying information data in the area corresponding to the information data area 1 .
  • the controller 25 also controls the electron beam irradiating apparatus 10 to irradiate an electron beam to an area on the surface of the resist layer corresponding to the lead-in area 2 in accordance with the lead-in data.
  • the surface of the resist layer is formed with a latent image corresponding to recording pits Pt 1 carrying the lead-in data in the area corresponding to the lead-in area 2 .
  • the controller 25 further controls the electron beam irradiating apparatus 10 to irradiate an electron beam to an area on the surface of the resist layer corresponding to the PEP area 4 in accordance with a phase encoded signal which is generated by phase encoding the reproduction control data.
  • the surface of the resist layer is formed with a latent image corresponding to recording pits Pt 2 carrying the reproduction control data in the area corresponding to the PEP area 4 .
  • phase encoding for the reproduction control data is performed, for example, in the following manner.
  • a recording track corresponding to the length of one rotation of the master 15 is regarded as one track.
  • one track is divided into three sectors, as shown in FIG. 6 .
  • Each sector has, for example, the length of 177 bits, and an 11-bit gap is provided between the sectors.
  • One sector is comprised of a 16-bit preamble, a 1-bit synchronization, a 24-bit track address and sector address, a 128-bit reproduction control data, and an 8-bit error detecting code.
  • the reproduction control data includes the 2-bit convex/concave identification information [ 01 ] indicating that convex and concave recording pits are formed in the first recording layer RY 1 and second recording layer RY 2 , respectively.
  • the controller 25 applies the phase encoding as shown in FIG. 7A or 7 B for each of the preamble, synchronization, track address, sector address, reproduction control data and error correcting code to generate phase encoded signals in accordance with the logical levels of the respective pits. For example, a bit at logical level 0 in the reproduction control data is converted to a phase encoded signal which repeats a change between logical levels 1 and 0 in the former half section AM of a predetermined duration T, and is fixed at logical level 0 in the latter half section PM, as shown in FIG. 7A .
  • a bit at logical level 1 in the reproduction control data is converted to a phase encoded signal which is fixed at logical level 0 in the former half section AM of the predetermined duration T, and repeats a change between logical levels 1 and 0 in the latter half section PM, as illustrated in FIG. 7B .
  • the controller 25 repeatedly uses the phase encoded signals for one sector, generated by the phase encoding, in the three sectors as illustrated in FIG. 6 , to generate phase encoded signals for one track.
  • the controller 25 further repeatedly supplies the electron beam irradiating apparatus 10 with the phase encoded signals for one track N times.
  • the electron beam irradiating apparatus 10 irradiates the surface of the resist layer on the master 15 with an electron beam only in a period in which the supplied phase encoded signal is at logical level 1 .
  • the surface of the resist layer is formed with a data-zero section and a data-one section in the area corresponding to the PEP area 4 in which pit trains comprised of the recording pits Pt 2 are recorded in the patterns as illustrated in FIG. 3 .
  • the data-zero section and data-one section refer to those sections on the recording track which are consumed for recording one bit of a variety of data (the preamble, synchronization, track address, sector address, reproduction control data, and error detecting code).
  • the data-zero section refers to a section indicative of a data bit at logical level 0 , in which a latent image corresponding to the recording pit Pt 2 is repeatedly formed in the former half section AM, while any latent image is not formed in the latter half section PM.
  • the data-one section refers to a section indicative of a data bit at logical level 1 , wherein any latent image is not formed in the former half section AM, while a latent image corresponding to the recording pit Pt 2 is repeatedly formed in the latter half section PM.
  • the latent images corresponding to the recording pits Pt 2 are formed in alignment to the disc radial direction, i.e., in the direction perpendicular to the recording track, on each of N recording tracks adjacent to each other.
  • the phase encoded signals for one track corresponding to the reproduction control data are recorded in the PEP area 4 on five recording tracks adjacent to each other in a similar manner.
  • the latent images formed on the resist layer of the master 15 are removed to create a resist pattern for forming the first recording layer RY 1 (second recording layer RY 2 ). Then, this resist pattern is used to create the first recording layer RY 1 which is formed with a pit train comprised of the convex recording pits Pt 1 and Pt 2 , and the second recording layer RY 2 which is formed with a pit train comprised of the concave recording pits Pt 1 and Pt 2 .
  • FIG. 8 is a diagram illustrating the configuration of the reproducing apparatus.
  • a pickup 81 irradiates reading beam light to the first recording layer RY 1 or second recording layer RY 2 on a recording disc 80 which is rotated by a spindle motor 82 .
  • the pickup 81 comprises four photodetectors 20 a - 20 d arranged in the pattern as illustrated in FIG. 1 , which individually receive reflected light from the recording disk 80 and opto-electrically transduce the reflected light to generate read signals Ra-Rd respectively, which are then supplied to a sum read signal generator circuit 83 and a push-pull read signal generator circuit 84 , respectively.
  • a slider mechanism 91 moves the pickup 81 in the disc radial direction.
  • the sum read signal generator circuit 83 adds the read signals Ra-Rd to generate a sum read signal R SUM which is supplied to an information demodulator circuit 85 and a reproduction control data decoder circuit 86 , respectively.
  • the information data demodulator circuit 85 performs predetermined modulation on the sum read signal R SUM to reproduce data recorded in the information data area 1 and lead-in area 2 of the first recording layer RY 1 or second recording layer RY 2 , and outputs the reproduced data as reproduction information data.
  • the reproduction control data decoder circuit 86 applies phase decoding to a phase encoded signal in the pattern as shown in FIG. 7A or 7 B, existing in the sum read signal R SUM , to recover reproduction control data comprised of data 0 or data 1 , which is supplied to the controller 10 .
  • the push-pull read signal generator circuit 83 generates a push-pull read signal R PP through the following processing using the read signal Ra-Rd, and supplies the push-pull read signal R PP to a polarity reversing circuit 88 :
  • R PP ( Ra+Rb ) ⁇ ( Rc+Rd )
  • All of the read signals Ra-Rd are not necessarily used for generating the push-pull signal R PP .
  • the push-pull read signal generator circuit 84 is only required to calculate the difference between the read signals Ra and Rd (or Rb and Rc) output from the photodetectors 20 a and 20 d (or 20 b and 20 c ) arranged in the direction perpendicular to the track, within the photodetectors 20 a - 20 d, to generate the push-pull read signal R PP .
  • the polarity reversing circuit 88 reverses the polarity of the push-pull read signal R PP and supplies a wobble signal processing circuit 89 and a tracking servo circuit 90 , respectively, with the polarity-reversed push-pull read signal R PP as a push-pull read signal R PP ′ when a polarity reversing signal PV at logical level 1 is supplied from the controller 100 .
  • the polarity reversing circuit 88 supplies the wobble signal processing circuit 89 and tracking servo circuit 90 , respectively, with the push-pull read signal R PP as it is as the push-pull read signal R PP ′.
  • the wobble signal processing circuit 89 extracts disc identification information based on a wobble pattern of a recording pit train formed in the area WE of the lead-in area 2 illustrated in FIG. 3 , based on the push-pull read signal R PP ′, and supplies the disc identification information to the controller 100 .
  • the tracking servo circuit 90 closes a tracking servo loop-formed of the pickup circuit 81 , push-pull read signal generator circuit 84 , polarity reversing circuit 88 and tracking servo circuit 90 when a tracking servo ON signal is supplied from the controller 100 .
  • the tracking servo circuit 90 generates a tracking error signal based on the push-pull read signal R PP ′, and supplies the tracking error signal to the pickup 81 .
  • the pickup 81 biases the optical axis of the reading beam light in the direction perpendicular to the track by an amount corresponding to the tracking error signal in order to make the reading beam light follow the recording pit train recorded on the recording disc 80 .
  • the tracking servo circuit 90 opens the tracking servo loop. This results in a failure in the operation for making the reading beam light follow the recording pit train, i.e., the tracking operation.
  • FIG. 9 is a diagram illustrating a subroutine executed when the reproducing apparatus is loaded with the recording disc 80 for acquiring the convex/concave identification information.
  • the controller 100 starts rotating the spindle motor 82 (step S 1 ).
  • the controller 100 supplies a tracking servo OFF signal to the tracking servo circuit 90 (step S 2 ).
  • the execution of step S 2 causes the tracking servo loop to open.
  • the controller 100 controls the slider mechanism 91 in order to move the pickup 81 to the starting position of the PEP area 4 on the first recording layer RY 1 (step S 3 ), and controls the pickup 81 to start reading recorded information from this position (step S 4 ).
  • the execution of steps S 3 and S 4 causes the pickup 81 to move to the starting position of the PEP area 4 on the first recording layer RY 1 and start reading the recorded information from this position.
  • each recording pit Pt 2 is recorded such that it is in alignment to the disc radial direction, i.e., the direction perpendicular to the track, as shown in FIG. 3 .
  • the pickup 81 can read an equivalent phase encoded signal from the PEP area 4 to that correctly read from one track.
  • the reproduction control data decoder circuit 86 applies the phase decoding to the phase encoded signal to recover the reproduction control data comprised of data 0 or data 1 which is supplied to the controller 100 .
  • the controller 100 extracts the convex/concave identification information from the reproduction control data, stores it in a convex/concave identification information register 101 (step S 5 ), and returns to the execution of a main routine (not shown).
  • the controller 100 first reads the convex/concave identification information from the PEP area 4 , indicating whether concave or convex recording pits are recorded in each of the first recording layer RY 1 and second recording layer RY 2 of the recording disc 80 . Then, the controller 100 stores the convex/concave identification information in the convex/concave identification information register 101 .
  • the controller 100 executes a subroutine for setting the polarity of a push-pull read signal, as illustrated in FIG. 10 .
  • the controller 100 first determines based on the convex/concave identification information stored in the convex/concave identification information register 101 whether or not concave recording pits are recorded on a recording layer (first recording layer RY 1 or second recording layer RY 2 ), from which information is to be reproduced (step S 11 ). Upon determining concave recording pits at step S 11 , the controller 100 supplies a polarity reversing signal PV at logical level 1 to the polarity reversing circuit 88 (step S 12 ).
  • step S 12 the polarity reversing circuit 88 reverses the polarity of the push-pull read signal R PP to generate a push-pull read signal R PP ′ which is supplied to the wobble signal processing circuit 89 and tracking servo circuit 90 , respectively.
  • the controller 100 supplies the polarity reversing signal PV at logical level 0 to the polarity reversing circuit 88 (step S 13 ).
  • step S 13 the polarity reversing circuit 88 supplies the push-pull read signal R PP as it is to the wobble signal processing circuit 89 and tracking servo circuit 90 , respectively, as the push-pull signal R PP ′.
  • step S 14 the controller 100 supplies a tracking servo On signal to the tracking servo circuit 90 (step S 14 ).
  • step S 15 the controller 100 controls the pickup 81 in order to start reading information from the lead-in area 2 of the recording layer from which information data is to be reproduced.
  • steps S 14 and S 15 the lead-in data is acquired from the lead-in area 2 of the recording layer, from which information data is to be reproduced, thereby enabling the reproduction of the information data from the information data area 1 of the recording layer.
  • the controller 100 first determines based on the convex/concave identification information read from the PEP area 4 of the recording disc 80 whether or not concave recording pits are recorded in the recording layer from which information data is to be reproduced. In this event, when determining that the recording pits are not concave but convex, the controller 100 makes a setting to maintain the polarity of the push-pull read signal, as it is, generated by the push-pull read signal generator circuit 84 . On the other hand, when determining the concave recording pits, the controller 100 makes a setting to reverse the polarity of the push-pull read signal.
  • the tracking control is conducted in accordance with the push-pull read signal generated by the push-pull read signal generator circuit 84 when convex recording pits are recorded in the recording layer from which information data is to be reproduced, while the control tracking is conducted in accordance with the polarity-reversed push-pull read signal when the concave recording pits are recorded.
  • the present invention can be applied in a similar manner to a recording disc which has a plurality of recording layers equal to or more than three. Also, for manufacturing the recording disc, when a disc manufacturer is entrusted to employ the convex recording pits or concave recording pits, the present invention can be applied as well to a single-layer recording disc which has only one recording layer, with similar advantages provided therefrom.
  • the present invention can be applied as well to a recording disc such as DVD-R which enables information data to be written thereon by changing a characteristic on a recording surface through phase change recording, magneto-optical recording or the like.
  • FIG. 11 is a plan view generally showing how areas are defined on such a writable recording disc which is commercially available for general purposes.
  • the recording disc is divided into an information data area 110 , a lead-in area 120 , a lead-out area 130 , and a BCA (burst cutting area) 140 .
  • the information data area 110 is an area for recording a variety of information data such as video, audio and computer data.
  • the lead-in area 120 in turn is an area for recording lead-in data which includes the recorded position, time required for reproduction, disc identification information and the like for each of information pieces recorded in the information data area 110 .
  • the BCA 140 in turn is an area in which reproduction control data including tracking information, convex/concave identification information and the like is recorded in the form of bar codes (later described).
  • the tracking information refers to such information for specifying a tracking method which should be performed for reading recorded information from the information data area 110 and lead-in area 120 .
  • the convex/concave identification information in turn refers to such information for specifying whether the information data and lead-in data are recorded in a convex portion or a concave portion in the information data area 110 and lead-in area 120 , respectively.
  • FIG. 12 is a diagram, viewed from the top surface of the disc, illustrating patterns in the information data area 110 , lead-in area 120 and BCA 140 , respectively.
  • the information data area 110 and lead-in area 120 are alternately formed with wobbled groove track GT and land track LT in a spiral fashion.
  • the groove track GT is convex
  • the land track LT is concave.
  • a disc recorder intermittently irradiates one of the land track LT and groove track TG with a recording beam in accordance with the information data.
  • a region irradiated with the recording beam has a characteristic (for example, the reflectivity, magnetization direction and the like) different from that of a region not irradiated with the recording beam.
  • this region is flat without convex or concave shape like the aforementioned recording pit, this region is hereinafter referred to as the “virtual pit” because it corresponds to the recording pit.
  • virtual pits VP are formed on the concave groove track GT, as illustrated in FIG. 13A .
  • virtual pits VP are formed on the convex land track LT, as illustrated in FIG. 13B .
  • the BCA 140 as shown in FIG.
  • the convex/concave identification information is represented by an array pattern of strip-shaped bar pits BP which extend from the inner periphery to the outer periphery of the disc as shown in FIG. 12 . Therefore, even if the reading beam light traces an outlined arrow as shown in FIG. 12 because of the tracking servo loop remaining open, the convex/concave identification information can be read based on the array pattern of the bar pits BP in a manner similar to the PEP area 4 .
  • FIG. 14 is a plan view generally showing how areas are defined on a recording disc for authoring which is sold only to contracted dealers.
  • the recording disc is divided into an information data area 111 , a lead-in area 121 , a lead-out area 131 , and PEP (phase encoded part) area 141 .
  • the information data area 111 is an area for recording a variety of information data such as video, audio and computer data.
  • the lead-in area 121 in turn is an area for recording lead-in data including a recorded position, time required for reproduction, disc identification information and the like for each of information data pieces recorded in the information data area 111 .
  • the PEP area 141 in turn is an area in which reproduction control data, phase encoded as described above, is recorded, including tracking information, convex/concave identification information and the like.
  • the convex/concave identification information refers to such information for specifying whether the information data and lead-in data should be recorded in a convex portion or a concave portion of the information data area 111 and lead-in area 121 , respectively.
  • FIG. 15 is a diagram, viewed from the top surface of the disc, illustrating patterns in the information data area 111 , lead-in area 121 and PEP area 141 , respectively.
  • the information data area 111 and lead-in area 121 are alternately formed with wobbled groove track GT and land track LT in a spiral fashion.
  • the groove track GT is convex
  • the land track LT is concave.
  • virtual pits VP are formed on the concave groove track GT, as illustrated in FIG. 13A .
  • virtual pits VP are formed on the convex land track LT, as illustrated in FIG. 13B .
  • the PEP area 141 as shown in FIG.
  • a recording pattern in the PEP area 141 is basically the same as that illustrated in FIG. 3 , except that the recording pits PT are recorded on the wobbled groove track GT or land track LT.
  • the recording disc according to the present invention has the convex/concave identification information recorded in the PEP area or BCA area for indicating whether recording pits carrying information data is concave or convex, or whether virtual pits are recorded in a convex portion (land track LT) or a concave portion (groove track GT).
  • identification information is recorded in a control data area (PEP area or BCA), from which information can be read when the tracking servo is open, for indicating a recording pattern of recording marks such as the recording pits or virtual pits recorded on the recording disc.
  • the recorded information reproducing apparatus illustrated in FIG. 8 reads the identification information from the recording disc with the open tracking servo, and once stores the identification information in the convex/concave identification information register 101 . Then, the controller 100 supplies the polarity reversing circuit 88 with a polarity reversing signal PV in accordance with the recording pattern of the recording marks indicated by this identification information to set the polarity of the push-pull read signal.
  • the polarity of the push-pull read signal is set in accordance with the recording pattern of the recording marks recorded on the recording disc, an information reproducing operation can be immediately started without trial reading even in a recorded information reproducing apparatus which employs a push-pull based tracking control.

Abstract

A recording disc and recorded information reproducing apparatus and method for immediately starting reproduction of information when a push-pull based tracking control is employed to reproduce recorded information from the recording disc. The recording disc comprises an information data area for recording recording marks which carry information data in columns, and a control data area for recording identification information indicative of a recording pattern of the recording marks in the information data area.

Description

    BACKGROUND OF THE INVENTION
  • 1. Field of the Invention
  • The present invention relates to a recording disc, and a recorded information reproducing apparatus and method for reproducing recorded information from the recording disc.
  • 2. Description of Related Art
  • Today, DVD-ROM is widely used as a read-only optical recording medium which has previously recorded thereon information data such as audio, video, computer data and the like. The DVD-ROM has, for example, a two-layer recording surface comprised of a first recording layer and a second recording layer. When viewing the first recording layer from the top layer from which a reading beam light is irradiated onto the DVD-ROM, a recording pit train carrying information data is formed on a spiral or concentric track. On the other hand, when viewing the second recording layer from the bottom surface of the DVD-ROM, a recording pit train carrying information data is formed on a spiral or concentric track. Specifically, when viewing the first and second recording layers from the top surface of the DVD-ROM, convex recording pits are formed in the first recording layer, while concave recording pits are formed in the second recording layer. For this reason, the recording pits recorded in the first recording layer are hereinafter referred to as the “convex recording pits,” while the recording pits recorded in the second recording layer to the “concave recording pits.”
  • A conventional reproducing apparatus for reproducing recorded information from the DVD-ROM conducts a tracking servo in accordance with a DPD (Differential Phase Detection) scheme. In the DPD-based tracking control, reflection from the recording disc irradiated with a beam light is individually received by four photodetectors 20 a-20 d, arranged in a manner as illustrated in FIG. 1, which opto-electrically transduce the reflection into read signals Ra-Rd which are used in the tracking control. Then, these read signals Ra-Rd are used in the following calculations to generate a high frequency signal and a diagonal differential signal. The difference in phase between the two signals is used as an error signal for conducting the tracking control:
    High Frequency Signal=Ra+Rb+Rc+Rd
    Diagonal Differential Signal=(Ra+Rc)−(Rb+Rd)
  • The employment of the DPD scheme results in the satisfactory tracking control both for the first recording layer in which convex recording pits are recorded and for the second recording layer in which concave recording pits are recorded.
  • On the other hand, a writable recording disk such as DVD-R or DVD-RW is previously formed with a recording track which has a wobble pattern corresponding to disc addresses indicative of positions on the disc. A recorded information reproducing apparatus for recording and reproducing information data to and from the DVD-R or DVD-RW reads the wobble pattern on the recording track formed on the recording disc to recognize the position on the disc, while information data is being recorded. In this event, a push-pull signal is used for reading the wobble pattern on the recording track. The push-pull signal is generated in accordance with the following calculation using read signals Ra-Rd which are generated by four photodetectors 20 a-20 d as illustrated in FIG. 1 which individually receive and opto-electrically transduce reflected light from the disc:
    Push-Pull Signal=(Ra+Rb)−(Rc+Rd)
  • In addition, the recorded information reproducing apparatus conducts a tracking servo based on the push-pull signal. Specifically, the recorded information reproducing apparatus for recording and reproducing information data to and from a recording disc such as DVD-R or DVD-RW acquires disc addresses corresponding to the wobble pattern on the recording track based on the push-pull signal while conducting the tracking control.
  • Thus, the conventional recorded information reproducing apparatus which supports any of DVD-R, DVD-RW and DVD-ROM comprises dedicated processing circuits for generating the push-pull signal, high frequency signal and diagonal differential signal, respectively, resulting in an extremely large scale of the apparatus. There has been therefore a need for a recorded information reproducing apparatus which only requires the push-pull signal to conduct the tracking servo for any of DVD-R, DVD-RW and DVD-ROM.
  • However, the push-pull signal generated when the convex recording pit train is read from the first recording layer of the DVD-ROM as mentioned above is opposite in polarity to the push-pull signal generated when the concave recording pit train is read from the second recording layer. As such, for reproducing recorded information from the DVD-ROM, information data is first read from a recording layer intended for reproduction on a trial basis. In this event, when an appropriate tracking control is failed, the polarity of the push-pull signal is reversed, followed by a repetition of the read operation again from the initial position.
  • Therefore, the read operation may not be immediately started in some cases when the tracking control is conducted using the push-pull signal for a multi-layer recording layer which has a recording layer having a convex recording pit train recorded therein and a recording layer having a concave recording pit train recorded therein, or for a single-layer recording disc on which no recording pits are defined in a convex or concave shape.
    • OBJECT AND SUMMARY OF THE INVENTION
  • The present invention has been made to solve the foregoing problem, and it is an object of the invention to provide a recording disc, and an apparatus and method for reproducing recorded information which can permit a reproducing operation to be immediately started for reproducing information data from the recording disc using a push-pull based tracking control.
  • A recording disc for recording information data thereon, according to a first aspect of the present invention, includes an information data area for recording recording marks carrying the information data in columns, and a control data area for recording identification information indicative of a recording pattern of the recording marks in the information data area.
  • A recorded information reproducing apparatus according to another aspect of the present invention is configured to reproduce recorded information from a recording disc having an information data area for recording recording marks carrying the information data in columns, and a control data area for recording identification information indicative of a recording pattern of the recording marks in the information data area. The recorded information reproducing apparatus includes a reading component for receiving reflected light from the recording disc irradiated with reading beam light and opto-electrically transducing the reflected light into read signals by at least two photodetectors arranged in a direction perpendicular to a track, push-pull read signal generator for calculating a difference between the read signals generated by the respective photodetectors to output the difference as a push-pull read signal, a tracking servo for biasing the optical axis of the reading light beam in the direction perpendicular to the track based on the push-pull read signal, an identification information reading component for reading the identification information from the control data area, an identifying component for identifying a recording pattern of the recording marks recorded in the information data area based on the identification information, and a polarity reversing component for reversing the polarity of the push-pull read signal in accordance with the result of the identification made by the identifying component.
  • A recorded information reproducing method according to a further aspect of the present invention is provided for reproducing recorded information from a recording disc having an information data area for recording recording marks carrying the information data in columns, and a control data area for recording identification information indicative of a recording pattern of the recording marks in the information data area. The recorded information reproducing method includes a reading step for receiving reflected light from the recording disc irradiated with reading beam light and opto-electrically transducing the reflected light into read signals by at least two photodetectors arranged in a direction perpendicular to a track, a push-pull read signal generating step for calculating a difference between the read signals generated by the respective photodetectors to output the difference as a push-pull read signal, a tracking control step for biasing the optical axis of the reading light beam in the direction perpendicular to the track based on the push-pull read signal, an identification information reading step for reading the identification information from the control data area, an identifying step for identifying a recording pattern of the recording marks recorded in the information data area based on the identification information, and a polarity reversing step for reversing the polarity of the push-pull read signal in accordance with the result of the identification made by the identifying step.
  • A recording disc according to a further aspect of the present invention includes a plurality of recording layers, wherein each recording layer has an information data area for recording recording pits carrying information data in columns, and a control data area for recording a convex/concave identification information indicating with respect to at least one of the recording layers whether each recording pit recorded on each recording layer is convex or concave.
  • A recorded information reproducing apparatus according to a further aspect of the present invention is configured to reproduce recorded information from a recording disc having a plurality of recording layers, wherein each recording layer includes an information data area for recording recording pits carrying information data in columns, and a control data area for recording a convex/concave identification information indicating with respect to at least one of the recording layers whether each recording pit recorded on each recording layer is convex or concave. The recorded information reproducing apparatus includes a reading component for receiving reflected light from the recording disc irradiated with reading beam light and opto-electrically transducing the reflected light into read signals by at least two photodetectors arranged in a direction perpendicular to a track, a push-pull read signal generator for calculating a difference between the read signals generated by the respective photodetectors to output the difference as a push-pull read signal, a tracking servo for biasing the optical axis of the reading light beam in the direction perpendicular to the track based on the push-pull read signal, a convex/concave identification information reading component for reading the convex/concave identification information from the control data area, a convex/concave identifying component for identifying the shape of the recording pits recorded in one of the recording layers from which information is to be reproduced, based on the convex/concave identification information, and a polarity reversing component for reversing the polarity of the push-pull read signal in accordance with the result of the identification made by the convex/concave identifying component.
  • A recorded information reproducing method according to a further aspect of the present invention is provided for reproducing recorded information from a recording disc having a plurality of recording layers, wherein each recording layer includes an information data area for recording recording pits carrying information data in columns, and a control data area for recording a convex/concave identification information indicating with respect to at least one of the recording layers whether each recording pit recorded on each recording layer is convex or concave. The recorded information reproducing method includes a push-pull read signal generating step for generating a push-pull read signal based on read signals read from the recording disc, a tracking control step for biasing the optical axis of the reading light beam in a direction perpendicular to a track based on the push-pull read signal, a convex/concave identification information reading step for reading the convex/concave identification information from the recording disc, a convex/concave identifying step for identifying the shape of the recording pits recorded in one of the recording layers from which information is to be reproduced, based on the convex/concave identification information, and a polarity reversing step for reversing the polarity of the push-pull read signal in accordance with the result of the identification made by the convex/concave identifying step.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a diagram illustrating an exemplary arrangement of photodetectors 20 a-20 d mounted in a pickup;
  • FIGS. 2A and 2B are diagrams generally illustrating the structure of a recording disc according to the present invention;
  • FIG. 3 is a diagram illustrating a portion of a pattern on the surface of a recording layer of the recording disc according to the present invention;
  • FIGS. 4A and 4B are diagrams illustrating concave recording pits and convex recording pits, respectively;
  • FIG. 5 is a diagram generally illustrating the configuration of a master recording apparatus according to the present invention;
  • FIG. 6 is a diagram showing a format for one track in a PEP area 4;
  • FIGS. 7A and 7B are diagrams showing the waveforms of phase encoded signals corresponding to one bit length of data;
  • FIG. 8 is a diagram illustrating the configuration of a reproducing apparatus according to the present invention;
  • FIG. 9 is a diagram illustrating a subroutine executed by a controller 100 of the reproducing apparatus illustrated in FIG. 8 for acquiring convex/concave identification information;
  • FIG. 10 is a diagram illustrating a subroutine executed by the controller 100 of the reproducing apparatus illustrated in FIG. 8 for setting the polarity of a push-pull read signal;
  • FIG. 11 is a plan view generally showing how areas are defined on a writable recording disc commercially available for general purposes;
  • FIG. 12 is a diagram illustrating a portion of a pattern on the surface of the recording disc illustrated in FIG. 11;
  • FIGS. 13A and 13B are diagrams showing exemplary patterns when information data is recorded on a land track LT and when information data is recorded on a groove track, respectively;
  • FIG. 14 is a plan view generally showing how areas are defined on a writable recording disc for authoring; and
  • FIG. 15 is a diagram illustrating a portion of a pattern on the surface of the recording disc illustrated in FIG. 14.
    • DETAILED DESCRIPTION OF THE EMBODIMENTS
  • FIGS. 2A and 2B generally illustrate an exemplary structure of a recording disc according to the present invention.
  • FIG. 2A is a cross-sectional view of the recording disc.
  • As illustrated in FIG. 2A, the recording disc comprises a first recording layer RY1 in which convex recording pits are recorded and a second recording layer RY2 in which concave recording pits are recorded. Each of these first recording layer RY1 and second recording layer RY2 is divided into an information data area 1, a lead-in area 2, a lead-out area 3, and a PEP (phase encoded part) area 4, as illustrated in FIG. 2B. The PEP area 4 may be provided only in one of the recording layer RY1 and second recording layer RY2.
  • The information data area 1 is an area in which a variety of information data is recorded, such as video, audio, and computer data. The lead-in area 2 in turn is an area in which lead-in data is recorded, including a recorded position, required time for reproduction, disc identification information and the like for each of information data pieces recorded in the information data area 1. The PEP area 4 in turn is an area in which phase encoded reproduction control data (later described) is recorded, including tracking information, convex/concave identification information and the like. The tracking information refers to such information for specifying a tracking method which should be conducted for reading recorded information from the first recording layer RY1 and second recording layer RY2. The convex/concave identification information refers to such information indicative of whether each of recording pits recorded in the first recording layer RY1 and second recording layer RY2 is convex or concave.
  • FIG. 3 is a diagram, viewed from the top surface of the disc, illustrating an exemplary recording pattern in each area of the first recording layer RY1 (or the second recording layer RY2).
  • As illustrated in FIG. 3, the information data area 1 is formed with pit trains comprised of recording pits Pt1 which carry information data. The lead-in area 2 in turn is formed with pit trains comprised of recording pits Pt1 which carry the lead-in data. It should be noted that in the lead-in area 2, an area WE for recording the disc identification information is formed with a pit train, as illustrated in FIG. 3, which wobbles in a pattern corresponding to the disc identification information. The PEP area 4 is formed with pit trains comprised of recording pits Pt2 corresponding to a phase encoded signal which is generated by phase encoded reproduction control data including the convex/concave identification information. In this event, each of the recording pits Pt1 formed in the PEP area 4 has the same recording pit length. In the PEP area 4, each of the recording pits pt2 is formed on one of a plurality of tracks adjacent to each other such that it is in alignment to the direction perpendicular to the track.
  • Here, in the first recording layer RY1, each of the recording pits Pt1 and recording pits Pt2 is a convex recording pit which protrudes from the disc surface as illustrated in FIG. 4A. On the other hand, in the recording layer RY2, each of the recording pits Pt1 and recording pits Pt2 is a convex recording pit which recesses into the disc surface, as illustrated in FIG. 4B.
  • Since the convex and concave recording pits are recorded in the first recording layer RY1 and second recording layer RY2, respectively, as described above, the convex/concave identification information forms 2-bit data [01] indicative of that state in the foregoing embodiment. When the concave and convex recording pits are recorded in the first recording layer RY1 and second recording layer RY2, respectively, the convex/concave identification information forms 2-bit data [10]. Further, the convex/concave identification information forms 2-bit data [00] when convex recording pits are recorded in both the first recording layer RY1 and second recording layer RY2, and forms 2-bit data [11] when concave recording pits are recorded in both the first recording layer RY1 and second recording layer RY2.
  • FIG. 5 is a diagram illustrating an exemplary configuration of a master recording apparatus for manufacturing a recording disc which has the structure as described above.
  • A master 15 is formed with a resist layer on the surface for creating a resist pattern corresponding to the first recording layer RY1 (second recording layer RY2). A spindle motor 17 rotates the master 15 at a constant angular velocity. A feed stage 18 moves the master 15 and spindle motor 17 in the radial direction of the master 15. An electronic beam irradiating apparatus 10 irradiates the surface of the resist layer on the master 15 with an electron beam in accordance with the information data, reproduction control data and lead-in data which have been input for recording on the recording disc.
  • A controller 25 controls the electron beam irradiating apparatus 10, spindle motor 17 and feed stage 18 to create a resist pattern corresponding to the first recording layer RY1 and a resist pattern corresponding to the second recording layer RY2, respectively.
  • First, the controller 25 controls the electron beam irradiating apparatus 10 to irradiate an electron beam to an area on the surface of the resist layer corresponding to the information data area 1 as illustrated in FIG. 3 in accordance with information data. As a result, the surface of the resist layer is formed with a latent image corresponding to information pits Pt1 carrying information data in the area corresponding to the information data area 1. The controller 25 also controls the electron beam irradiating apparatus 10 to irradiate an electron beam to an area on the surface of the resist layer corresponding to the lead-in area 2 in accordance with the lead-in data. As a result, the surface of the resist layer is formed with a latent image corresponding to recording pits Pt1 carrying the lead-in data in the area corresponding to the lead-in area 2. The controller 25 further controls the electron beam irradiating apparatus 10 to irradiate an electron beam to an area on the surface of the resist layer corresponding to the PEP area 4 in accordance with a phase encoded signal which is generated by phase encoding the reproduction control data. As a result, the surface of the resist layer is formed with a latent image corresponding to recording pits Pt2 carrying the reproduction control data in the area corresponding to the PEP area 4.
  • The phase encoding for the reproduction control data is performed, for example, in the following manner.
  • First, in the PEP area 5, a recording track corresponding to the length of one rotation of the master 15 is regarded as one track. In this event, one track is divided into three sectors, as shown in FIG. 6. Each sector has, for example, the length of 177 bits, and an 11-bit gap is provided between the sectors. One sector is comprised of a 16-bit preamble, a 1-bit synchronization, a 24-bit track address and sector address, a 128-bit reproduction control data, and an 8-bit error detecting code. In this event, the reproduction control data includes the 2-bit convex/concave identification information [01] indicating that convex and concave recording pits are formed in the first recording layer RY1 and second recording layer RY2, respectively.
  • The controller 25 applies the phase encoding as shown in FIG. 7A or 7B for each of the preamble, synchronization, track address, sector address, reproduction control data and error correcting code to generate phase encoded signals in accordance with the logical levels of the respective pits. For example, a bit at logical level 0 in the reproduction control data is converted to a phase encoded signal which repeats a change between logical levels 1 and 0 in the former half section AM of a predetermined duration T, and is fixed at logical level 0 in the latter half section PM, as shown in FIG. 7A. On the other hand, a bit at logical level 1 in the reproduction control data is converted to a phase encoded signal which is fixed at logical level 0 in the former half section AM of the predetermined duration T, and repeats a change between logical levels 1 and 0 in the latter half section PM, as illustrated in FIG. 7B. The controller 25 repeatedly uses the phase encoded signals for one sector, generated by the phase encoding, in the three sectors as illustrated in FIG. 6, to generate phase encoded signals for one track. The controller 25 further repeatedly supplies the electron beam irradiating apparatus 10 with the phase encoded signals for one track N times. The electron beam irradiating apparatus 10 irradiates the surface of the resist layer on the master 15 with an electron beam only in a period in which the supplied phase encoded signal is at logical level 1. In this way, the surface of the resist layer is formed with a data-zero section and a data-one section in the area corresponding to the PEP area 4 in which pit trains comprised of the recording pits Pt2 are recorded in the patterns as illustrated in FIG. 3. The data-zero section and data-one section refer to those sections on the recording track which are consumed for recording one bit of a variety of data (the preamble, synchronization, track address, sector address, reproduction control data, and error detecting code). In this event, the data-zero section refers to a section indicative of a data bit at logical level 0, in which a latent image corresponding to the recording pit Pt2 is repeatedly formed in the former half section AM, while any latent image is not formed in the latter half section PM. On the other hand, the data-one section refers to a section indicative of a data bit at logical level 1, wherein any latent image is not formed in the former half section AM, while a latent image corresponding to the recording pit Pt2 is repeatedly formed in the latter half section PM. In this event, in the PEP area 4, the latent images corresponding to the recording pits Pt2 are formed in alignment to the disc radial direction, i.e., in the direction perpendicular to the recording track, on each of N recording tracks adjacent to each other. Specifically, in the example illustrated in FIG. 3, the phase encoded signals for one track corresponding to the reproduction control data are recorded in the PEP area 4 on five recording tracks adjacent to each other in a similar manner.
  • Here, upon completion of recording on the master 15 (formation of the latent images on the resist layer), only the latent images formed on the resist layer of the master 15 are removed to create a resist pattern for forming the first recording layer RY1 (second recording layer RY2). Then, this resist pattern is used to create the first recording layer RY1 which is formed with a pit train comprised of the convex recording pits Pt1 and Pt2, and the second recording layer RY2 which is formed with a pit train comprised of the concave recording pits Pt1 and Pt2.
  • Next, description will be made on a reproducing apparatus for reproducing recorded information from the recording disc which has the first recording layer RY1 and second recording layer RY2, as described above.
  • FIG. 8 is a diagram illustrating the configuration of the reproducing apparatus.
  • In FIG. 8, a pickup 81 irradiates reading beam light to the first recording layer RY1 or second recording layer RY2 on a recording disc 80 which is rotated by a spindle motor 82. The pickup 81 comprises four photodetectors 20 a-20 d arranged in the pattern as illustrated in FIG. 1, which individually receive reflected light from the recording disk 80 and opto-electrically transduce the reflected light to generate read signals Ra-Rd respectively, which are then supplied to a sum read signal generator circuit 83 and a push-pull read signal generator circuit 84, respectively. A slider mechanism 91 moves the pickup 81 in the disc radial direction.
  • The sum read signal generator circuit 83 adds the read signals Ra-Rd to generate a sum read signal RSUM which is supplied to an information demodulator circuit 85 and a reproduction control data decoder circuit 86, respectively. The information data demodulator circuit 85 performs predetermined modulation on the sum read signal RSUM to reproduce data recorded in the information data area 1 and lead-in area 2 of the first recording layer RY1 or second recording layer RY2, and outputs the reproduced data as reproduction information data.
  • The reproduction control data decoder circuit 86 applies phase decoding to a phase encoded signal in the pattern as shown in FIG. 7A or 7B, existing in the sum read signal RSUM, to recover reproduction control data comprised of data 0 or data 1, which is supplied to the controller 10.
  • The push-pull read signal generator circuit 83 generates a push-pull read signal RPP through the following processing using the read signal Ra-Rd, and supplies the push-pull read signal RPP to a polarity reversing circuit 88:
    R PP=(Ra+Rb)−(Rc+Rd)
  • All of the read signals Ra-Rd are not necessarily used for generating the push-pull signal RPP. In essence, the push-pull read signal generator circuit 84 is only required to calculate the difference between the read signals Ra and Rd (or Rb and Rc) output from the photodetectors 20 a and 20 d (or 20 b and 20 c) arranged in the direction perpendicular to the track, within the photodetectors 20 a-20 d, to generate the push-pull read signal RPP.
  • The polarity reversing circuit 88 reverses the polarity of the push-pull read signal RPP and supplies a wobble signal processing circuit 89 and a tracking servo circuit 90, respectively, with the polarity-reversed push-pull read signal RPP as a push-pull read signal RPP′ when a polarity reversing signal PV at logical level 1 is supplied from the controller 100. On the other hand, when the polarity reversing signal at logical level 0 is supplied, the polarity reversing circuit 88 supplies the wobble signal processing circuit 89 and tracking servo circuit 90, respectively, with the push-pull read signal RPP as it is as the push-pull read signal RPP′. The wobble signal processing circuit 89 extracts disc identification information based on a wobble pattern of a recording pit train formed in the area WE of the lead-in area 2 illustrated in FIG. 3, based on the push-pull read signal RPP′, and supplies the disc identification information to the controller 100.
  • The tracking servo circuit 90 closes a tracking servo loop-formed of the pickup circuit 81, push-pull read signal generator circuit 84, polarity reversing circuit 88 and tracking servo circuit 90 when a tracking servo ON signal is supplied from the controller 100. In this event, the tracking servo circuit 90 generates a tracking error signal based on the push-pull read signal RPP′, and supplies the tracking error signal to the pickup 81. In response, the pickup 81 biases the optical axis of the reading beam light in the direction perpendicular to the track by an amount corresponding to the tracking error signal in order to make the reading beam light follow the recording pit train recorded on the recording disc 80. On the other hand, when a tracking servo OFF signal is supplied from the controller 100, the tracking servo circuit 90 opens the tracking servo loop. This results in a failure in the operation for making the reading beam light follow the recording pit train, i.e., the tracking operation.
  • Next, description will be made on the operation of the reproducing apparatus illustrated in FIG. 8.
  • FIG. 9 is a diagram illustrating a subroutine executed when the reproducing apparatus is loaded with the recording disc 80 for acquiring the convex/concave identification information.
  • First, in FIG. 9, the controller 100 starts rotating the spindle motor 82 (step S1). Next, the controller 100 supplies a tracking servo OFF signal to the tracking servo circuit 90 (step S2). The execution of step S2 causes the tracking servo loop to open. Next, the controller 100 controls the slider mechanism 91 in order to move the pickup 81 to the starting position of the PEP area 4 on the first recording layer RY1 (step S3), and controls the pickup 81 to start reading recorded information from this position (step S4). The execution of steps S3 and S4 causes the pickup 81 to move to the starting position of the PEP area 4 on the first recording layer RY1 and start reading the recorded information from this position. In this event, since the tracking servo loop is open, reading beam light irradiated from the pickup 81 traces, for example, on an outlined arrow shown in FIG. 3, such that it traverses each track in the PEP area 4. As described above, a recording pit train carrying the reproduction control data, for one turn of the disc, is formed in the PEP area 4 as it is in a similar manner on a plurality of tracks adjacent to each other. In addition, in the PEP area 4, each recording pit Pt2 is recorded such that it is in alignment to the disc radial direction, i.e., the direction perpendicular to the track, as shown in FIG. 3. Therefore, even if the reading beam light moves to traverse each track, the pickup 81 can read an equivalent phase encoded signal from the PEP area 4 to that correctly read from one track. Here, the reproduction control data decoder circuit 86 applies the phase decoding to the phase encoded signal to recover the reproduction control data comprised of data 0 or data 1 which is supplied to the controller 100.
  • The controller 100 extracts the convex/concave identification information from the reproduction control data, stores it in a convex/concave identification information register 101 (step S5), and returns to the execution of a main routine (not shown).
  • According to the subroutine for acquiring the convex/concave identification information illustrated in FIG. 9, the controller 100 first reads the convex/concave identification information from the PEP area 4, indicating whether concave or convex recording pits are recorded in each of the first recording layer RY1 and second recording layer RY2 of the recording disc 80. Then, the controller 100 stores the convex/concave identification information in the convex/concave identification information register 101.
  • Here, for reproducing information data from the information data area 1 of the first recording layer RY1 or second recording layer 2 of the recording disc 80, the controller 100 executes a subroutine for setting the polarity of a push-pull read signal, as illustrated in FIG. 10.
  • In FIG. 10, the controller 100 first determines based on the convex/concave identification information stored in the convex/concave identification information register 101 whether or not concave recording pits are recorded on a recording layer (first recording layer RY1 or second recording layer RY2), from which information is to be reproduced (step S11). Upon determining concave recording pits at step S11, the controller 100 supplies a polarity reversing signal PV at logical level 1 to the polarity reversing circuit 88 (step S12). With the execution of step S12, the polarity reversing circuit 88 reverses the polarity of the push-pull read signal RPP to generate a push-pull read signal RPP′ which is supplied to the wobble signal processing circuit 89 and tracking servo circuit 90, respectively. On the other hand, in failure of determining the concave recording pits at step S11, the controller 100 supplies the polarity reversing signal PV at logical level 0 to the polarity reversing circuit 88 (step S13). With the execution of step S13, the polarity reversing circuit 88 supplies the push-pull read signal RPP as it is to the wobble signal processing circuit 89 and tracking servo circuit 90, respectively, as the push-pull signal RPP′. After the execution of step S12 or S13, the controller 100 supplies a tracking servo On signal to the tracking servo circuit 90 (step S14). Next, the controller 100 controls the pickup 81 in order to start reading information from the lead-in area 2 of the recording layer from which information data is to be reproduced (step S15). With the execution of steps S14 and S15, the lead-in data is acquired from the lead-in area 2 of the recording layer, from which information data is to be reproduced, thereby enabling the reproduction of the information data from the information data area 1 of the recording layer.
  • As described above, in the subroutine for setting the polarity of the push-pull read signal as illustrated in FIG. 10, the controller 100 first determines based on the convex/concave identification information read from the PEP area 4 of the recording disc 80 whether or not concave recording pits are recorded in the recording layer from which information data is to be reproduced. In this event, when determining that the recording pits are not concave but convex, the controller 100 makes a setting to maintain the polarity of the push-pull read signal, as it is, generated by the push-pull read signal generator circuit 84. On the other hand, when determining the concave recording pits, the controller 100 makes a setting to reverse the polarity of the push-pull read signal. Therefore, the tracking control is conducted in accordance with the push-pull read signal generated by the push-pull read signal generator circuit 84 when convex recording pits are recorded in the recording layer from which information data is to be reproduced, while the control tracking is conducted in accordance with the polarity-reversed push-pull read signal when the concave recording pits are recorded.
  • While the foregoing embodiment has been described in connection with an exemplary recording disc 90 which has two recording layers (RY1, RY2) as illustrated in FIG. 8, the present invention can be applied in a similar manner to a recording disc which has a plurality of recording layers equal to or more than three. Also, for manufacturing the recording disc, when a disc manufacturer is entrusted to employ the convex recording pits or concave recording pits, the present invention can be applied as well to a single-layer recording disc which has only one recording layer, with similar advantages provided therefrom.
  • Also, while the foregoing embodiment has been described in connection with an exemplary recording disc on which convex or concave recording pits are recorded, the present invention can be applied as well to a recording disc such as DVD-R which enables information data to be written thereon by changing a characteristic on a recording surface through phase change recording, magneto-optical recording or the like.
  • FIG. 11 is a plan view generally showing how areas are defined on such a writable recording disc which is commercially available for general purposes.
  • As shown in FIG. 11, the recording disc is divided into an information data area 110, a lead-in area 120, a lead-out area 130, and a BCA (burst cutting area) 140.
  • The information data area 110 is an area for recording a variety of information data such as video, audio and computer data. The lead-in area 120 in turn is an area for recording lead-in data which includes the recorded position, time required for reproduction, disc identification information and the like for each of information pieces recorded in the information data area 110. The BCA 140 in turn is an area in which reproduction control data including tracking information, convex/concave identification information and the like is recorded in the form of bar codes (later described). The tracking information refers to such information for specifying a tracking method which should be performed for reading recorded information from the information data area 110 and lead-in area 120. The convex/concave identification information in turn refers to such information for specifying whether the information data and lead-in data are recorded in a convex portion or a concave portion in the information data area 110 and lead-in area 120, respectively.
  • FIG. 12 is a diagram, viewed from the top surface of the disc, illustrating patterns in the information data area 110, lead-in area 120 and BCA 140, respectively.
  • As illustrated in FIG. 12, the information data area 110 and lead-in area 120 are alternately formed with wobbled groove track GT and land track LT in a spiral fashion. As illustrated in FIGS. 13A and 13B, the groove track GT is convex, while the land track LT is concave. Here, for writing information data into the recording disc, a disc recorder intermittently irradiates one of the land track LT and groove track TG with a recording beam in accordance with the information data. In this event, a region irradiated with the recording beam has a characteristic (for example, the reflectivity, magnetization direction and the like) different from that of a region not irradiated with the recording beam. While this region is flat without convex or concave shape like the aforementioned recording pit, this region is hereinafter referred to as the “virtual pit” because it corresponds to the recording pit. Here, when the recording beam corresponding to information data is irradiated onto the groove track GT, virtual pits VP are formed on the concave groove track GT, as illustrated in FIG. 13A. On the other hand, when the recording beam corresponding to information data is irradiated onto the land track LT, virtual pits VP are formed on the convex land track LT, as illustrated in FIG. 13B. In this event, the BCA 140 as shown in FIG. 12 includes the convex/concave identification information recorded for specifying whether the virtual pits VP carrying the information data are recorded on the concave groove track GT or on the convex land track LT. In the BCA 140, the convex/concave identification information is represented by an array pattern of strip-shaped bar pits BP which extend from the inner periphery to the outer periphery of the disc as shown in FIG. 12. Therefore, even if the reading beam light traces an outlined arrow as shown in FIG. 12 because of the tracking servo loop remaining open, the convex/concave identification information can be read based on the array pattern of the bar pits BP in a manner similar to the PEP area 4.
  • FIG. 14 is a plan view generally showing how areas are defined on a recording disc for authoring which is sold only to contracted dealers.
  • As shown in FIG. 14, the recording disc is divided into an information data area 111, a lead-in area 121, a lead-out area 131, and PEP (phase encoded part) area 141.
  • The information data area 111 is an area for recording a variety of information data such as video, audio and computer data. The lead-in area 121 in turn is an area for recording lead-in data including a recorded position, time required for reproduction, disc identification information and the like for each of information data pieces recorded in the information data area 111. The PEP area 141 in turn is an area in which reproduction control data, phase encoded as described above, is recorded, including tracking information, convex/concave identification information and the like. The convex/concave identification information refers to such information for specifying whether the information data and lead-in data should be recorded in a convex portion or a concave portion of the information data area 111 and lead-in area 121, respectively.
  • FIG. 15 is a diagram, viewed from the top surface of the disc, illustrating patterns in the information data area 111, lead-in area 121 and PEP area 141, respectively.
  • As illustrated in FIG. 15, the information data area 111 and lead-in area 121 are alternately formed with wobbled groove track GT and land track LT in a spiral fashion. As illustrated in FIGS. 13A and 13B, the groove track GT is convex, while the land track LT is concave. Here, when the recording beam corresponding to information data is irradiated onto the groove track GT, virtual pits VP are formed on the concave groove track GT, as illustrated in FIG. 13A. On the other hand, when the recording beam corresponding to information data is irradiated onto the land track LT, virtual pits VP are formed on the convex land track LT, as illustrated in FIG. 13B. In this event, the PEP area 141 as shown in FIG. 15 includes the convex/concave identification information which is recorded for specifying whether the virtual pits VP carrying the information data is recorded on the concave groove track GT or on the convex land track LT. A recording pattern in the PEP area 141 is basically the same as that illustrated in FIG. 3, except that the recording pits PT are recorded on the wobbled groove track GT or land track LT.
  • As described above, the recording disc according to the present invention has the convex/concave identification information recorded in the PEP area or BCA area for indicating whether recording pits carrying information data is concave or convex, or whether virtual pits are recorded in a convex portion (land track LT) or a concave portion (groove track GT). In other words, identification information is recorded in a control data area (PEP area or BCA), from which information can be read when the tracking servo is open, for indicating a recording pattern of recording marks such as the recording pits or virtual pits recorded on the recording disc.
  • Therefore, the recorded information reproducing apparatus illustrated in FIG. 8 reads the identification information from the recording disc with the open tracking servo, and once stores the identification information in the convex/concave identification information register 101. Then, the controller 100 supplies the polarity reversing circuit 88 with a polarity reversing signal PV in accordance with the recording pattern of the recording marks indicated by this identification information to set the polarity of the push-pull read signal.
  • According to the present invention, since the polarity of the push-pull read signal is set in accordance with the recording pattern of the recording marks recorded on the recording disc, an information reproducing operation can be immediately started without trial reading even in a recorded information reproducing apparatus which employs a push-pull based tracking control.
  • This application is based on Japanese Patent Applications Nos. 2002-128219 and 2002-258656 which are hereby incorporated by reference.

Claims (12)

1. A recording disk, comprising:
a first recording layer comprising a first recording track;
a second recording layer comprising a second recording track;
a control data area in which identification information is recorded,
wherein the identification information indicates a polarity of a first push-pull signal obtained from the first recording layer, and
wherein said identification information is recorded in said control data area a plurality of times in a direction perpendicular to said first recording track or said second recording track.
2. The recording disk as claimed in claim 1, wherein said identification information comprises:
first information that indicates the polarity of the first push-pull signal obtained from the first recording layer; and
second information that indicates a polarity of a second push-pull signal obtained from the second recording layer.
3. The recording disk as claimed in claim 1, wherein said control data area comprises a Phase Encoded Part (PEP) area.
4. The recording disk as claimed in claim 2, wherein said control data area comprises a Phase Encoded Part (PEP) area.
5. The recording disk as claimed in claim 1, wherein said identification information is structured so that a reproduction apparatus can read said identification information from said recording disk while a tracking servo of said reproduction apparatus is in an open state.
6. The recording disk as claimed in claim 2, wherein said identification information is structured so that a reproduction apparatus can read said identification information from said recording disk while a tracking servo of said reproduction apparatus is in an open state.
7. The recording disk as claimed in claim 3, wherein said identification information is structured so that a reproduction apparatus can read said identification information from said recording disk while a tracking servo of said reproduction apparatus is in an open state.
8. A recording disk as claimed in claim 4, wherein said identification information is structured so that a reproduction apparatus can read said identification information from said recording disk while a tracking servo of said reproduction apparatus is in an open state.
9. A recording disk, comprising:
an information area in which information is recorded on a recording track; and
a control data area in which identification information is recorded, wherein said identification information indicates a polarity of a push-pull signal obtained from said information area;
wherein said identification information is recorded in said control data area a plurality of times in a direction perpendicular to the recording track.
10. A recording disk, comprising:
an information area for recording information; and
a control data area in which identification information is recorded,
wherein said identification information indicates a polarity of a push-pull signal obtained from said information area,
wherein said identification information is recorded in said control data area a plurality of times in a direction perpendicular to a recording track of the recording disk.
11. A reproducing apparatus for reproducing recorded information from a recording disk, said reproducing apparatus comprising:
a reproduction circuit that generates a readout signal by projecting a light beam onto a recording layer of the recording disk and opto-electrically converting a reflection light from the recording layer;
a processing circuit that restores identification information recorded in a control data area of the recording disk based on said readout signal and that generates a push-pull signal based on the readout signal, wherein the identification information indicates a polarity of the push-pull signal obtained from the recording layer; and
a tracking servo circuit that shifts an optical axis of the light beam in a direction perpendicular to a recording track of the recording layer in accordance with said push-pull signal,
wherein the identification information is recorded a plurality of times in a direction perpendicular to the recording track.
12. A reproducing method for reproducing information from a recording disk having a plurality of recording layers and a control data area, said reproducing method comprising:
projecting a light beam onto one of the recording layers of the recording disk and reading a readout signal from the recording disk;
restoring identification information recorded in the control data area of the recording disk based on the readout signal;
generating a push-pull signal based on said identification information and said readout signal; and
shifting an optical axis of the light beam in a direction perpendicular to a recording track of one of the recording layers in accordance with the push-pull signal,
wherein the identification information indicates a polarity of the push-pull signal, and
wherein the identification information is recorded a plurality of times in a direction perpendicular to the recording track.
US11/135,396 2002-04-30 2005-05-24 Recording disc and apparatus and method for reproducing recorded information Abandoned US20050213483A1 (en)

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JP2002-258656 2002-09-04
US10/417,211 US7292509B2 (en) 2002-04-30 2003-04-17 Recording disc and apparatus and method for reproducing recorded information
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020126597A1 (en) * 2001-03-09 2002-09-12 Lg Electronics Inc. Read-only recording medium and reproducing method thereof
US20030227853A1 (en) * 2002-05-01 2003-12-11 Kim Jin Yong High-density read-only optical disc, and optical disc apparatus and method using the same
US20040165517A1 (en) * 2002-06-05 2004-08-26 Kim Jin Yong Recording medium with a linking area including error correction code data thereon and apparatus and methods for forming, recording, and reproducing the recording medium
US20040223427A1 (en) * 2003-02-19 2004-11-11 Kim Jin Yong Recording medium, apparatus for forming the recording medium, and apparatus and method for reproducing the recording medium
US20040233809A1 (en) * 2002-07-02 2004-11-25 Suh Sang Woon Recording medium with restricted playback feature and apparatus and methods for forming, recording, and reproducing the recording medium
US20060101283A1 (en) * 2002-06-05 2006-05-11 Kim Jin Y High-density optical disc, method for recording and reproducing encrypted data thereon
US20080225684A1 (en) * 2004-07-12 2008-09-18 Mamoru Shoji Information recording medium, integrated circuit, recording/playback apparatus, computer program, and information recording/playback method
US20110158059A1 (en) * 2006-01-31 2011-06-30 Kazuo Watabe Information storage medium, recording method, and recording apparatus

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7133331B2 (en) * 2000-12-28 2006-11-07 Victor Company Of Japan, Limited Recording medium having a substrate containing microscopic pattern of parallel groove and land sections and recording/reproducing equipment therefor
MXPA05002569A (en) * 2002-09-11 2005-05-27 Koninkl Philips Electronics Nv Multilayer optical disc having a recording stack type indicator.
KR100716966B1 (en) * 2002-11-04 2007-05-10 삼성전자주식회사 Optical disc having tracking polarity information, apparatus and method for recording and reproducing the same thereon
KR20040048476A (en) * 2002-12-03 2004-06-10 삼성전자주식회사 Optical information reproducing apparatus and method
US20050213467A1 (en) * 2002-12-17 2005-09-29 Yoshihiro Noda Optical recording medium, and recording/reading method and recording/reading apparatus for optical recording medium
KR100727919B1 (en) * 2003-02-03 2007-06-14 삼성전자주식회사 Optical information storage medium
JP2004326857A (en) * 2003-04-22 2004-11-18 Sony Corp Magneto-optical disk and its recording and reproducing method
JP4717820B2 (en) * 2003-05-20 2011-07-06 サムスン エレクトロニクス カンパニー リミテッド Information recording medium and data recording and / or reproducing method and apparatus for information recording medium
KR100750111B1 (en) * 2003-05-20 2007-08-17 삼성전자주식회사 Information storage medium and apparatus of recording on and/or reproducing data from the same
US7512048B2 (en) * 2003-11-20 2009-03-31 Warner Bros. Entertainment Inc. Method and apparatus for reading optical discs having different configurations
JP4212460B2 (en) * 2003-11-28 2009-01-21 株式会社東芝 Optical disc apparatus and information reproducing method
KR20050088015A (en) * 2004-02-28 2005-09-01 삼성전자주식회사 Method and system for recording on and/or reproducing data from information storage medium
TWI356404B (en) * 2004-03-08 2012-01-11 Panasonic Corp Optical recording medium, method for manufacturing
US20050207293A1 (en) * 2004-03-16 2005-09-22 Kim Jin Y Recording medium and method for recording and reproducing data on and from the same
JP2005310329A (en) * 2004-04-26 2005-11-04 Sony Corp Optical recording medium, reproducing apparatus, and tracking servo method
DE602005022702D1 (en) * 2004-05-11 2010-09-16 Panasonic Corp WOBBLE INFORMATION RECORDING PROCEDURE, INFORMATION RECORDING MEDIUM AND RECORDING AND REPLAY METHOD AND DEVICE THEREFOR
JP2006155802A (en) * 2004-11-30 2006-06-15 Toshiba Corp Information storage medium, stamper, management information recording apparatus, disk device, and management information reproducing method
DE602005018102D1 (en) 2004-12-09 2010-01-14 Nec Corp OPTICAL RECORDING MEDIA OF THE RECORDING TYPE AND OPTICAL DATA CARRIER DEVICE THEREFOR
JP4473768B2 (en) * 2005-04-14 2010-06-02 株式会社東芝 Information storage medium, reproducing method and recording method
KR100667507B1 (en) 2005-08-01 2007-01-10 엘지전자 주식회사 Rewritable high density digital versatile disc
JP2007102984A (en) * 2005-10-07 2007-04-19 Pioneer Electronic Corp Optical disk
JP2007257686A (en) 2006-03-20 2007-10-04 Nec Corp Rewritable optical disk recording method, and optical disk drive unit
JP2007323775A (en) * 2006-06-02 2007-12-13 Toshiba Corp Optical recording medium, information recording method, and information reproducing method
WO2008120370A1 (en) * 2007-03-29 2008-10-09 Pioneer Corporation Information recording/reproducing apparatus
WO2008120372A1 (en) * 2007-03-29 2008-10-09 Pioneer Corporation Information recording/reproducing apparatus

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4964094A (en) * 1987-07-15 1990-10-16 Matsushita Electric Industrial Co., Ltd. Optical disk
US5452284A (en) * 1992-09-14 1995-09-19 Matsushita Electric Industrial Co., Ltd. Optical recording/reproducing medium and apparatus using land and groove encoded information signals and identification signals including position information
US5481510A (en) * 1992-02-28 1996-01-02 Fujitsu Limited Seek control system for optical storage apparatus
US5508995A (en) * 1993-07-15 1996-04-16 Matsushita Electric Industrial Co., Ltd. Optical disk capable of recording information on both groove and land tracks
US5809007A (en) * 1995-10-09 1998-09-15 Matsushita Electric Industrial Co., Ltd. Optical disk and optical disk reproduction apparatus
US6052465A (en) * 1995-10-09 2000-04-18 Matsushita Electric Industrial Co., Ltd. Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk
US6078559A (en) * 1996-10-23 2000-06-20 Matsushita Electric Industrial Co., Ltd. Optical disk having read-only and rewritable areas with overlapping formats
US6272086B1 (en) * 1997-11-18 2001-08-07 International Business Machines Corporation Low cost tamper-resistant method for write-once read many (WORM) storage
US20010033543A1 (en) * 2000-03-24 2001-10-25 Tetsuya Akiyama Optical information recording medium, and method and apparatus for recording/reproducing information thereon
US20030016603A1 (en) * 2001-07-17 2003-01-23 Pioneer Corporation Optical disk, recording apparatus and playing apparatus
US20030048719A1 (en) * 2000-03-29 2003-03-13 Keiichi Kawashima Optical disc, recording device, and recording device
US20030137910A1 (en) * 2002-01-22 2003-07-24 Hiroshi Ueda Multi-layered information recording medium, reproduction apparatus, recording apparatus, reproduction method, and recording method
US20030179688A1 (en) * 2002-03-25 2003-09-25 Blankenbeckler David L. Inner region identifier for optical disk
US6801484B2 (en) * 2001-09-12 2004-10-05 Media Tek Inc. Method for generating header and transition flags using DPD technology and optical device using the same
US6937544B2 (en) * 2001-09-28 2005-08-30 Kabushiki Kaisha Toshiba Optical disk unit for recording or reproducing information

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5750330A (en) 1980-09-11 1982-03-24 Matsushita Electric Ind Co Ltd Optical recording and reproducing device
JP2543523B2 (en) * 1987-05-22 1996-10-16 パイオニア株式会社 Disc and its playback device
JP2635610B2 (en) * 1987-09-09 1997-07-30 株式会社東芝 Disk unit
JPH02149932A (en) 1988-11-30 1990-06-08 Victor Co Of Japan Ltd Optical disk reader
JPH03142717A (en) * 1989-10-27 1991-06-18 Ricoh Co Ltd Optical disk
US5132954A (en) * 1990-09-24 1992-07-21 International Business Machines Corporation Controls for optical disk relating to accessing and utilization of such disk
US5255262A (en) * 1991-06-04 1993-10-19 International Business Machines Corporation Multiple data surface optical data storage system with transmissive data surfaces
JPH0515644A (en) 1991-07-15 1993-01-26 Sankyo Kk Game machine
JP3111923B2 (en) * 1997-04-10 2000-11-27 松下電器産業株式会社 Method and apparatus for recording information on optical disc
KR100380291B1 (en) * 1997-06-16 2003-04-16 톰슨 콘슈머 일렉트로닉스, 인코포레이티드 Identification of program information on a recording medium
US6343062B1 (en) 1997-09-26 2002-01-29 Matsushita Electric Industrial Co., Ltd Optical disk device and optical disk for recording and reproducing high-density signals
JP4097801B2 (en) 1997-09-26 2008-06-11 松下電器産業株式会社 optical disk
KR100255191B1 (en) * 1997-12-31 2000-06-01 윤종용 Disc and method for detecting kind of the disc in optical disc player
JP2000149415A (en) * 1998-11-02 2000-05-30 Matsushita Electric Ind Co Ltd Optical disk, reproducing device and duplicating device thereof, and method for preventing illegal use thereof
US6377526B1 (en) * 1999-04-01 2002-04-23 Plasmon Ide, Inc. Erasable WORM optical disk and method of writing thereto multiple times
JP3512161B2 (en) 1999-07-14 2004-03-29 シャープ株式会社 Optical disk drive
TW561471B (en) * 2000-01-07 2003-11-11 Matsushita Electric Ind Co Ltd Information recording disc and information reproducing system
JP3561204B2 (en) 2000-03-06 2004-09-02 シャープ株式会社 Optical disk drive
JP3655797B2 (en) 2000-03-21 2005-06-02 シャープ株式会社 Tracking method of optical recording medium
CN1252580C (en) 2000-05-19 2006-04-19 松下电器产业株式会社 Data recording medium and reproducing apparatus thereof
DE10032034A1 (en) * 2000-07-05 2002-01-17 Thomson Brandt Gmbh Method for quickly establishing read and / or write readiness of a device for reading and / or writing to an optical recording medium, and device designed accordingly

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4964094A (en) * 1987-07-15 1990-10-16 Matsushita Electric Industrial Co., Ltd. Optical disk
US5481510A (en) * 1992-02-28 1996-01-02 Fujitsu Limited Seek control system for optical storage apparatus
US5452284A (en) * 1992-09-14 1995-09-19 Matsushita Electric Industrial Co., Ltd. Optical recording/reproducing medium and apparatus using land and groove encoded information signals and identification signals including position information
US5508995A (en) * 1993-07-15 1996-04-16 Matsushita Electric Industrial Co., Ltd. Optical disk capable of recording information on both groove and land tracks
US5809007A (en) * 1995-10-09 1998-09-15 Matsushita Electric Industrial Co., Ltd. Optical disk and optical disk reproduction apparatus
US6052465A (en) * 1995-10-09 2000-04-18 Matsushita Electric Industrial Co., Ltd. Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk
US6078559A (en) * 1996-10-23 2000-06-20 Matsushita Electric Industrial Co., Ltd. Optical disk having read-only and rewritable areas with overlapping formats
US6272086B1 (en) * 1997-11-18 2001-08-07 International Business Machines Corporation Low cost tamper-resistant method for write-once read many (WORM) storage
US20010033543A1 (en) * 2000-03-24 2001-10-25 Tetsuya Akiyama Optical information recording medium, and method and apparatus for recording/reproducing information thereon
US20030048719A1 (en) * 2000-03-29 2003-03-13 Keiichi Kawashima Optical disc, recording device, and recording device
US20030016603A1 (en) * 2001-07-17 2003-01-23 Pioneer Corporation Optical disk, recording apparatus and playing apparatus
US6801484B2 (en) * 2001-09-12 2004-10-05 Media Tek Inc. Method for generating header and transition flags using DPD technology and optical device using the same
US6937544B2 (en) * 2001-09-28 2005-08-30 Kabushiki Kaisha Toshiba Optical disk unit for recording or reproducing information
US20030137910A1 (en) * 2002-01-22 2003-07-24 Hiroshi Ueda Multi-layered information recording medium, reproduction apparatus, recording apparatus, reproduction method, and recording method
US20030179688A1 (en) * 2002-03-25 2003-09-25 Blankenbeckler David L. Inner region identifier for optical disk

Cited By (45)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020126597A1 (en) * 2001-03-09 2002-09-12 Lg Electronics Inc. Read-only recording medium and reproducing method thereof
US7619961B2 (en) 2001-03-09 2009-11-17 Lg Electronics Inc. Read-only recording medium and reproducing method thereof
US7656778B2 (en) 2001-03-09 2010-02-02 Lg Electronics, Inc. Apparatus and method of reproducing data stored in a read-only recording medium
US7545730B2 (en) 2001-03-09 2009-06-09 Lg Electronics Inc. Read-only recording medium and reproducing method thereof
US20080205222A1 (en) * 2001-03-09 2008-08-28 Jin Yong Kim Read-only recording medium and reproducing method thereof
US20030227853A1 (en) * 2002-05-01 2003-12-11 Kim Jin Yong High-density read-only optical disc, and optical disc apparatus and method using the same
US7801006B2 (en) * 2002-05-01 2010-09-21 Lg Electronics, Inc. High-density read-only optical disc, and optical disc apparatus and method using the same
US7830768B2 (en) 2002-05-01 2010-11-09 Lg Electronics Inc. High-density read-only optical disc, and optical disc apparatus and method using the same
US7643387B2 (en) 2002-05-01 2010-01-05 Lg Electronics Inc. High-density read-only optical disc, and optical disc apparatus and method using the same
US20050063261A1 (en) * 2002-05-01 2005-03-24 Kim Jln Yong High-density read-only optical disc, and optical disc apparatus and method using the same
US20080056092A1 (en) * 2002-05-01 2008-03-06 Kim Jin Y High-density read-only optical disc, and optical disc apparatus and method using the same
US8014248B2 (en) 2002-06-05 2011-09-06 Lg Electronics Inc. Recording medium with a linking area including dummy data thereon and apparatus and methods for forming, recording, and reproducing the recording medium
US20040165512A1 (en) * 2002-06-05 2004-08-26 Kim Jin Yong Recording medium with a linking area including dummy data thereon and apparatus and methods for forming, recording, and reproducing the recording medium
US20080095026A1 (en) * 2002-06-05 2008-04-24 Kim Jin Y High-density optical disc, method for recording and reproducing encrypted data thereon
US7872960B2 (en) 2002-06-05 2011-01-18 Lg Electronics Inc. Recording medium with a linking area thereon and apparatus and methods for forming, recording, and reproducing the recording medium
US8351315B2 (en) 2002-06-05 2013-01-08 Lg Electronics Inc. Recording medium with a linking area including a synch pattern thereon and apparatus and methods for forming, recording, and reproducing the recording medium
US20040168010A1 (en) * 2002-06-05 2004-08-26 Kim Jin Yong Recording medium with a linking area including a physical address thereon and apparatus and methods for forming, recording, and reproducing the recording medium
US7525889B2 (en) 2002-06-05 2009-04-28 Lg Electronics Inc. Recording medium with a linking area including dummy data thereon and apparatus and methods for forming, recording, and reproducing the recording medium
US7542393B2 (en) 2002-06-05 2009-06-02 Lg Electronics, Inc. Recording medium with a linking area including a sync pattern thereon and apparatus and method for forming, recording, and reproducing the recording medium
US7542405B2 (en) 2002-06-05 2009-06-02 Lg Electronics Inc. High-density optical disc, method for recording and reproducing encrypted data thereon
US20060101283A1 (en) * 2002-06-05 2006-05-11 Kim Jin Y High-density optical disc, method for recording and reproducing encrypted data thereon
US7558175B2 (en) 2002-06-05 2009-07-07 Lg Electronics Inc. Recording medium with a linking area thereon and apparatus and methods for forming, recording, and reproducing the recording medium
US20040165515A1 (en) * 2002-06-05 2004-08-26 Kim Jin Yong Recording medium with a linking area including a synch pattern thereon and apparatus and methods for forming, recording, and reproducing the recording medium
US7577080B2 (en) 2002-06-05 2009-08-18 Lg Electronics Inc. Recording medium with a linking area thereon and apparatus and methods for forming, recording, and reproducing the recording medium
US20090207706A1 (en) * 2002-06-05 2009-08-20 Jin Yong Kim Recording medium with a Linking area including dummy data thereon and apparatus and methods for forming, recording,and reproducing the recording medium
US7599279B2 (en) 2002-06-05 2009-10-06 Lg Electronics Inc. High-density optical disc, method for recording and reproducing encrypted data thereon
US20040165517A1 (en) * 2002-06-05 2004-08-26 Kim Jin Yong Recording medium with a linking area including error correction code data thereon and apparatus and methods for forming, recording, and reproducing the recording medium
US20090303862A1 (en) * 2002-06-05 2009-12-10 Jin Yong Kim Recording medium with a linking area including a synch pattern thereon and apparatus and methods for forming, recording, and reproducing the recording medium
US20090303863A1 (en) * 2002-06-05 2009-12-10 Jin Yong Kim Recording medium with a linking area thereon and apparatus and methods for forming, recording, and reproducing the recording medium
US20060262712A1 (en) * 2002-07-02 2006-11-23 Suh Sang W Recording medium with restricted playback feature and apparatus and methods for forming, recording, and reproducing the recording medium
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US7502307B2 (en) 2002-07-02 2009-03-10 Lg Electronics Inc. Recording medium with restricted playback feature and apparatus and methods for forming, recording, and reproducing the recording medium
US8432779B2 (en) 2002-07-02 2013-04-30 Lg Electronics Inc. Recording medium with restricted playback feature and apparatus and methods for forming, recording, and reproducing the recording medium
US20050105432A1 (en) * 2002-07-02 2005-05-19 Suh Sang W. Recording medium with restricted playback feature and apparatus and methods for forming, recording, and reproducing the recording medium
US8077572B2 (en) 2002-07-02 2011-12-13 Lg Electronics Inc. Recording medium with restricted playback feature and apparatus and methods for forming, recording, and reproducing the recording medium
US20040223427A1 (en) * 2003-02-19 2004-11-11 Kim Jin Yong Recording medium, apparatus for forming the recording medium, and apparatus and method for reproducing the recording medium
US7574003B2 (en) 2003-02-19 2009-08-11 Lg Electronics Inc. Recording medium, apparatus for forming the recording medium, and apparatus and method for reproducing the recording medium
US7965592B2 (en) 2004-07-12 2011-06-21 Panasonic Corporation Information recording medium, integrated circuit, recording/playback apparatus, computer program, and information recording/playback method
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US7301860B2 (en) 2007-11-27
EP1501085A4 (en) 2009-04-08
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WO2003094155A1 (en) 2003-11-13
US20060245314A1 (en) 2006-11-02
US7292509B2 (en) 2007-11-06
EP1501085B1 (en) 2011-08-03

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