CA2459086C - Recording medium having data structure for managing recording and reproduction of multiple path data recorded thereon and recording and reproducing methods and apparatus - Google Patents
Recording medium having data structure for managing recording and reproduction of multiple path data recorded thereon and recording and reproducing methods and apparatus Download PDFInfo
- Publication number
- CA2459086C CA2459086C CA2459086A CA2459086A CA2459086C CA 2459086 C CA2459086 C CA 2459086C CA 2459086 A CA2459086 A CA 2459086A CA 2459086 A CA2459086 A CA 2459086A CA 2459086 C CA2459086 C CA 2459086C
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- Canada
- Prior art keywords
- angle change
- video data
- angle
- information
- recording medium
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
- H04N9/804—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components
- H04N9/8042—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components involving data reduction
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
- G11B27/031—Electronic editing of digitised analogue information signals, e.g. audio or video signals
- G11B27/034—Electronic editing of digitised analogue information signals, e.g. audio or video signals on discs
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/102—Programmed access in sequence to addressed parts of tracks of operating record carriers
- G11B27/105—Programmed access in sequence to addressed parts of tracks of operating record carriers of operating discs
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
- G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
- G11B27/30—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording
- G11B27/3027—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording used signal is digitally coded
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
- G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
- G11B27/32—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on separate auxiliary tracks of the same or an auxiliary record carrier
- G11B27/327—Table of contents
- G11B27/329—Table of contents on a disc [VTOC]
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2537—Optical discs
- G11B2220/2541—Blu-ray discs; Blue laser DVR discs
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/84—Television signal recording using optical recording
- H04N5/85—Television signal recording using optical recording on discs or drums
Abstract
The recording medium includes at least one navigation area storing navigation management information for managing reproduction of the multiple reproduction path video data recorded on the recording medium. The navigation area has a plurality of angle change recording information corresponding to each of a plurality of data blocks.
Description
DESCRIPTION
RECORDING MEDIUM HAVING DATA STRUCTURE FOR
MANAGING RECORDING AND REPRODUCTION OF MULTIPLE
PATH DATA RECORDED THEREON AND RECORDING AND
REPRODUCING METHODS AND APPARATUS
1. TECHNICAL FIELD
The present invention relates to a recording medium having a data structure for managing reproduction of at least multiple reproduction path video data recorded thereon as well as methods and apparatuses for reproduction and recording.
RECORDING MEDIUM HAVING DATA STRUCTURE FOR
MANAGING RECORDING AND REPRODUCTION OF MULTIPLE
PATH DATA RECORDED THEREON AND RECORDING AND
REPRODUCING METHODS AND APPARATUS
1. TECHNICAL FIELD
The present invention relates to a recording medium having a data structure for managing reproduction of at least multiple reproduction path video data recorded thereon as well as methods and apparatuses for reproduction and recording.
2. BACKGROUND ART
The standardization of new high-density read only and rewritable optical disks capable of recording large amounts of high-quality video and audio data has been progressing rapidly and new optical disk related products are expected to be commercially available on the market in the near future. The Blu-ray Disk Rewritable (BD-RW) is one example of these new optical disks.
Fig. 1 illustrates the file structure of the BD-RW. As shown, the data structure includes a root directory that contains at least one BDAV directory. The BDAV directory includes files such as linfo.bdavi, Imenu.tidx', and'mark.tidx1, a PLAYLIST subdirectory in which playlist files (*.rpls and *.vp1s) are stored, a CLIPINF
subdirectory in which clip information files (*.clpi) are stored, and a STREAM subdirectory in which MPEG2-formatted A/V stream clip files (*.m2ts) corresponding to the clip information files are stored. In addition to illustrating the data structure of the optical disk, Fig. 1 represents the areas of the optical disk. For example, the general information file info.bdav is stored in a general information area or areas on the optical disk.
Because the BD-RW data structure and disk format as illustrated in Fig. 1 is well-known and readily available, only a brief overview of the file structure will be provided in this disclosure.
As alluded to above, the STREAM directory includes MPEG2-formatted A/V stream files called clips.
The STREAM
directory may also include a special type of clip referred to as a bridge-clip A/V stream file. A bridge-clip is used for making seamless connection between two or more presentation intervals selected in the clips, and generally have a small data size compared to the clips. The A/V stream includes source packets of video and audio data. For example, a source packet of video data includes a header and a transport packet. A source packet includes a source packet number, which is generally a sequentially assigned number that serves as an address for accessing the source packet.
Transport packets include a packet identifier (PID) . The PID
identifies the sequence of transport packets to which a transport packet belongs. Each transport packet in the sequence will have the same PID.
The CLIPINF directory includes a clip information file associated with each A/V stream file. The clip information file indicates, among other things, the type of A/V stream associated therewith, sequence information, program information and timing information. The sequence information describes the arrival time basis (ATC) and system time basis (STC) sequences. For example, the sequence information indicates, among other things, the number of sequences, the beginning and ending time information for each sequence, the address of the first source packet in each sequence and the PID of the transport packets in each sequence. A sequence of source packets in which the contents of a program is constant is called a program sequence. The program information indicates, among other things, the number of program sequences, the starting address for each program sequence, and the PID(s) of transport packets in a program sequence.
The timing information is referred to as characteristic point information (CPI) . One form of CPI is the entry point (EP) map.
The EP map maps a presentation time stamp (e.g., on an arrival time basis (ATC) and/or a system time basis (STC) to a source packet address (i.e., source packet number) .
The PLAYLIST directory includes one or more playlist files.
The concept of a playlist has been introduced to promote ease of editing/assembling clips for playback. A playlist file is a collection of playing intervals in the clips. Each playing interval is referred to as a playitem. The playlist file, among other things, identifies each playitem forming the playlist, and each playitem, among other things, is a pair of IN-point and OUT-point that point to positions on a time axis of the clip (e.g., presentation time stamps on an ATC or STC basis) . Expressed another way, the playlist file identifies the playitems, each playitem points to a clip or portion thereof and identifies the clip information file associated with the clip. The clip information file is used, among other things, to map the playitems to the clip of source packets.
A playlist directory may include real playlists (*.rpls) and virtual playlists (* .vp1s) . A real playlist can only use clips and not bridge-clips. Namely, the real playlist is considered as referring to parts of clips, and therefore, conceptually considered equivalent in disk space to the referred to parts of the clips. A
virtual playlist can use both clips and bridge-clips, and therefore, the conceptual considerations of a real playlist do not exist with virtual playlists.
The info . bdav file is a general information file that provides general information for managing the reproduction of the A/V stream recorded on the optical disk. More specifically, the info .bdav file includes, among other things, a table of playlists that identifies the files names of the play list in the PLAYLIST directory of the same BDAV directory.
The menu.tidx, menu.tdt1 and menu.tdt2 files store information related to menu thumbnails. The mark.tidx, mark.tdt1
The standardization of new high-density read only and rewritable optical disks capable of recording large amounts of high-quality video and audio data has been progressing rapidly and new optical disk related products are expected to be commercially available on the market in the near future. The Blu-ray Disk Rewritable (BD-RW) is one example of these new optical disks.
Fig. 1 illustrates the file structure of the BD-RW. As shown, the data structure includes a root directory that contains at least one BDAV directory. The BDAV directory includes files such as linfo.bdavi, Imenu.tidx', and'mark.tidx1, a PLAYLIST subdirectory in which playlist files (*.rpls and *.vp1s) are stored, a CLIPINF
subdirectory in which clip information files (*.clpi) are stored, and a STREAM subdirectory in which MPEG2-formatted A/V stream clip files (*.m2ts) corresponding to the clip information files are stored. In addition to illustrating the data structure of the optical disk, Fig. 1 represents the areas of the optical disk. For example, the general information file info.bdav is stored in a general information area or areas on the optical disk.
Because the BD-RW data structure and disk format as illustrated in Fig. 1 is well-known and readily available, only a brief overview of the file structure will be provided in this disclosure.
As alluded to above, the STREAM directory includes MPEG2-formatted A/V stream files called clips.
The STREAM
directory may also include a special type of clip referred to as a bridge-clip A/V stream file. A bridge-clip is used for making seamless connection between two or more presentation intervals selected in the clips, and generally have a small data size compared to the clips. The A/V stream includes source packets of video and audio data. For example, a source packet of video data includes a header and a transport packet. A source packet includes a source packet number, which is generally a sequentially assigned number that serves as an address for accessing the source packet.
Transport packets include a packet identifier (PID) . The PID
identifies the sequence of transport packets to which a transport packet belongs. Each transport packet in the sequence will have the same PID.
The CLIPINF directory includes a clip information file associated with each A/V stream file. The clip information file indicates, among other things, the type of A/V stream associated therewith, sequence information, program information and timing information. The sequence information describes the arrival time basis (ATC) and system time basis (STC) sequences. For example, the sequence information indicates, among other things, the number of sequences, the beginning and ending time information for each sequence, the address of the first source packet in each sequence and the PID of the transport packets in each sequence. A sequence of source packets in which the contents of a program is constant is called a program sequence. The program information indicates, among other things, the number of program sequences, the starting address for each program sequence, and the PID(s) of transport packets in a program sequence.
The timing information is referred to as characteristic point information (CPI) . One form of CPI is the entry point (EP) map.
The EP map maps a presentation time stamp (e.g., on an arrival time basis (ATC) and/or a system time basis (STC) to a source packet address (i.e., source packet number) .
The PLAYLIST directory includes one or more playlist files.
The concept of a playlist has been introduced to promote ease of editing/assembling clips for playback. A playlist file is a collection of playing intervals in the clips. Each playing interval is referred to as a playitem. The playlist file, among other things, identifies each playitem forming the playlist, and each playitem, among other things, is a pair of IN-point and OUT-point that point to positions on a time axis of the clip (e.g., presentation time stamps on an ATC or STC basis) . Expressed another way, the playlist file identifies the playitems, each playitem points to a clip or portion thereof and identifies the clip information file associated with the clip. The clip information file is used, among other things, to map the playitems to the clip of source packets.
A playlist directory may include real playlists (*.rpls) and virtual playlists (* .vp1s) . A real playlist can only use clips and not bridge-clips. Namely, the real playlist is considered as referring to parts of clips, and therefore, conceptually considered equivalent in disk space to the referred to parts of the clips. A
virtual playlist can use both clips and bridge-clips, and therefore, the conceptual considerations of a real playlist do not exist with virtual playlists.
The info . bdav file is a general information file that provides general information for managing the reproduction of the A/V stream recorded on the optical disk. More specifically, the info .bdav file includes, among other things, a table of playlists that identifies the files names of the play list in the PLAYLIST directory of the same BDAV directory.
The menu.tidx, menu.tdt1 and menu.tdt2 files store information related to menu thumbnails. The mark.tidx, mark.tdt1
3 and mark .tdt2 files store information that relates to mark thumbnails. Because these files are not particularly relevant to the present invention, they will not be discussed further.
The standardization for high-density read-only optical disks such as the Blu-ray ROM (BD-ROM) is still under way. An effective data structure for managing reproduction of video and audio data recorded on the high-density read-only optical disk such as a BD-ROM
is not yet available.
3. DISCLOSURE OF INVENTION
The recording medium according to one aspect of the invention has a recording medium having a data structure for managing reproduction of at least video data having multiple reproduction path recorded on the recording medium, comprising:
at least one navigation area storing navigation management information for managing reproduction of the video data having multiple reproduction path recorded on the recording medium, the video data being stored in one or more clip files, each navigation management information associated with one of the clip files, each clip file of the multiple reproduction paths being associated with one of the multiple reproduction paths, said navigation management information having angle change information corresponding to each of a plurality of video data blocks, wherein said angle change information indicates whether an angle change is permitted or not, and the angle change information further indicates where the angle change is permitted, the angle change from a current angle to a requested angle is performed if the angle change is permitted, and the current angle is maintained until a position at which exit of the current angle is permitted.
In another aspect of the invention, there is provided a method of recording a data structure for managing reproduction of at least video data having multiple reproduction path on a recording medium, comprising:
generating navigation management information for managing reproduction of the video data having multiple reproduction path in at least one navigation area of
The standardization for high-density read-only optical disks such as the Blu-ray ROM (BD-ROM) is still under way. An effective data structure for managing reproduction of video and audio data recorded on the high-density read-only optical disk such as a BD-ROM
is not yet available.
3. DISCLOSURE OF INVENTION
The recording medium according to one aspect of the invention has a recording medium having a data structure for managing reproduction of at least video data having multiple reproduction path recorded on the recording medium, comprising:
at least one navigation area storing navigation management information for managing reproduction of the video data having multiple reproduction path recorded on the recording medium, the video data being stored in one or more clip files, each navigation management information associated with one of the clip files, each clip file of the multiple reproduction paths being associated with one of the multiple reproduction paths, said navigation management information having angle change information corresponding to each of a plurality of video data blocks, wherein said angle change information indicates whether an angle change is permitted or not, and the angle change information further indicates where the angle change is permitted, the angle change from a current angle to a requested angle is performed if the angle change is permitted, and the current angle is maintained until a position at which exit of the current angle is permitted.
In another aspect of the invention, there is provided a method of recording a data structure for managing reproduction of at least video data having multiple reproduction path on a recording medium, comprising:
generating navigation management information for managing reproduction of the video data having multiple reproduction path in at least one navigation area of
4 the recording medium, the video data being stored in one or more clip files, each navigation management information associated with one of the clip files, each clip file of the multiple reproduction paths being associated with one of the multiple reproduction paths, said navigation management information having a plurality of angle change information corresponding to each of a plurality of video data blocks, recording the navigation management information in the navigation area of the recording medium, wherein said angle change information indicates whether an angle change is permitted or not, and the angle change information further indicates where the angle change is permitted, the angle change from a current angle to a requested angle is performed if the angle change is permitted, and the current angle is maintained until a position at which exit of the current angle is permitted.
Still another aspect of the invention provides a method of reproducing a data structure for managing reproduction of at least video data having multiple reproduction path on a recording medium, the steps comprising:
reproducing navigation management information for managing reproduction of the video data having multiple reproduction path from at least one navigation area of the recording medium, the video data being stored in one or more clip files, each navigation management information associated with one of the clip files, each clip file of the multiple reproduction paths being associated with one of the multiple reproduction paths, said navigation management information having a plurality of angle change information corresponding to each of a plurality of video data blocks, controlling reproduction of the video data having multiple reproduction path according to said navigation management information, wherein said angle change information indicates whether an angle change is permitted or not, and the angle change information further indicates where the angle change is permitted, the angle change from a current angle to a requested angle is performed if the angle change is permitted, and the current angle is maintained until a position at which exit of the current angle is permitted.
4a Yet another aspect of the invention provides an apparatus for recording a data structure for managing reproduction of at least video data having multiple reproduction path recorded on a recording medium, comprising:
a recording unit configured to record data on the recording medium;
a controller, operably coupled to the recording unit, configured to control the recording unit to record navigation management information for managing reproduction of the video data having multiple reproduction path in at least one navigation area of the recording medium, the video data being stored in one or more clip files, each navigation management information associated with one of the clip files, each clip file of the multiple reproduction paths being associated with one of the multiple reproduction paths, said navigation management information having a plurality of angle change information corresponding to each of a plurality of video data block, wherein said angle change information indicates whether an angle change is permitted or not, and the angle change information further indicates where the angle change is permitted, the angle change from a current angle to a requested angle is performed if the angle change is permitted, and the current angle is maintained until a position at which exit of the current angle is permitted.
Still another aspect of the invention provides an apparatus for reproducing a data structure for managing reproduction of at least video data having multiple reproduction path recorded on a recording medium, comprising:
a reproducing unit configured to reproduce data recorded on the recording medium;
a controller, operably coupled to the reproduction unit, configured to control the reproducing unit to reproduce navigation management information for managing reproduction of the video data having multiple reproduction path from at least one navigation area of the recording medium, the video data being stored in one or more clip files, each navigation management information associated with one of the clip files, each clip file of the multiple reproduction paths being associated with one of the multiple reproduction paths, the controller configured to control the reproducing 4b unit to execute an angle change if an angle change authorization is detected in the navigation management information, wherein said angle change information indicates whether an angle change is permitted or not, and the angle change information further indicates where the angle change is permitted, the angle change from a current angle to a requested angle is performed if the angle change is permitted, and the current angle is maintained until a position at which exit of the current angle is permitted.
4. BRIEF DESCRIPTION OF DRAWINGS
The above features and other advantages of the present invention will be more clearly understood from the following detailed description with the accompanying drawings in which:
4c Fig. 1 illustrates the prior art file or data structure of a rewritable optical disk according to the Blu-ray Disc Rewritable (BD-RW) standard;
Fig. 2 illustrates an exemplary embodiment of a recording medium file or data structure according to the present invention;
Fig. 3 illustrates an example of a recording medium in accordance with the present invention;
Fig. 4 illustrates a Contained Self -Encoded Stream Format transport stream for use in the data structure according to Fig.
2;
Fig. 5 illustrates an exemplary embodiment of a data structure for an entry point map that is recorded and managed by a search information management method for a high-density optical disk in accordance with the present invention;
Fig. 6 illustrates an exemplary embodiment of an entry point map which is recorded and managed by a search information management method for a high-density optical disk in accordance with the present invention;
Fig. 7 illustrates a schematic diagram of an embodiment of an optical disk recording and reproduction apparatus of the present invention; and Fig. 8 illustrates a multi-angle playback process based on a search information management method for a high-density optical disk in accordance with the present invention.
Still another aspect of the invention provides a method of reproducing a data structure for managing reproduction of at least video data having multiple reproduction path on a recording medium, the steps comprising:
reproducing navigation management information for managing reproduction of the video data having multiple reproduction path from at least one navigation area of the recording medium, the video data being stored in one or more clip files, each navigation management information associated with one of the clip files, each clip file of the multiple reproduction paths being associated with one of the multiple reproduction paths, said navigation management information having a plurality of angle change information corresponding to each of a plurality of video data blocks, controlling reproduction of the video data having multiple reproduction path according to said navigation management information, wherein said angle change information indicates whether an angle change is permitted or not, and the angle change information further indicates where the angle change is permitted, the angle change from a current angle to a requested angle is performed if the angle change is permitted, and the current angle is maintained until a position at which exit of the current angle is permitted.
4a Yet another aspect of the invention provides an apparatus for recording a data structure for managing reproduction of at least video data having multiple reproduction path recorded on a recording medium, comprising:
a recording unit configured to record data on the recording medium;
a controller, operably coupled to the recording unit, configured to control the recording unit to record navigation management information for managing reproduction of the video data having multiple reproduction path in at least one navigation area of the recording medium, the video data being stored in one or more clip files, each navigation management information associated with one of the clip files, each clip file of the multiple reproduction paths being associated with one of the multiple reproduction paths, said navigation management information having a plurality of angle change information corresponding to each of a plurality of video data block, wherein said angle change information indicates whether an angle change is permitted or not, and the angle change information further indicates where the angle change is permitted, the angle change from a current angle to a requested angle is performed if the angle change is permitted, and the current angle is maintained until a position at which exit of the current angle is permitted.
Still another aspect of the invention provides an apparatus for reproducing a data structure for managing reproduction of at least video data having multiple reproduction path recorded on a recording medium, comprising:
a reproducing unit configured to reproduce data recorded on the recording medium;
a controller, operably coupled to the reproduction unit, configured to control the reproducing unit to reproduce navigation management information for managing reproduction of the video data having multiple reproduction path from at least one navigation area of the recording medium, the video data being stored in one or more clip files, each navigation management information associated with one of the clip files, each clip file of the multiple reproduction paths being associated with one of the multiple reproduction paths, the controller configured to control the reproducing 4b unit to execute an angle change if an angle change authorization is detected in the navigation management information, wherein said angle change information indicates whether an angle change is permitted or not, and the angle change information further indicates where the angle change is permitted, the angle change from a current angle to a requested angle is performed if the angle change is permitted, and the current angle is maintained until a position at which exit of the current angle is permitted.
4. BRIEF DESCRIPTION OF DRAWINGS
The above features and other advantages of the present invention will be more clearly understood from the following detailed description with the accompanying drawings in which:
4c Fig. 1 illustrates the prior art file or data structure of a rewritable optical disk according to the Blu-ray Disc Rewritable (BD-RW) standard;
Fig. 2 illustrates an exemplary embodiment of a recording medium file or data structure according to the present invention;
Fig. 3 illustrates an example of a recording medium in accordance with the present invention;
Fig. 4 illustrates a Contained Self -Encoded Stream Format transport stream for use in the data structure according to Fig.
2;
Fig. 5 illustrates an exemplary embodiment of a data structure for an entry point map that is recorded and managed by a search information management method for a high-density optical disk in accordance with the present invention;
Fig. 6 illustrates an exemplary embodiment of an entry point map which is recorded and managed by a search information management method for a high-density optical disk in accordance with the present invention;
Fig. 7 illustrates a schematic diagram of an embodiment of an optical disk recording and reproduction apparatus of the present invention; and Fig. 8 illustrates a multi-angle playback process based on a search information management method for a high-density optical disk in accordance with the present invention.
5. MODES FOR CARRYING OUT THE INVENTION
In order that the invention may be fully understood, preferred embodiments thereof will now be described with reference to the accompanying drawings.
A high-density optical disk, for example, a Blu-ray ROM
(BD-ROM) in accordance with the present invention may have a file or data structure for managing reproduction of video and audio data as shown in Fig. 2. Many aspects of the data structure according to the present invention shown in Fig. 2 are similar to that of the BD-RW standard discussed with respect to Fig. 1. As such these aspects will not be described in great detail.
As shown in Fig. 2, the root directory contains at least one DVP directory. The DVP directory includes a general information file info.dvp, menu files menu.tidx, menu.tdt1 among others, a PLAYLIST directory in which playlist files (e.g., real (*.rpls) and virtual (*.vpls)) are stored, a CLIPINF directory in which clip information files (*.clpi) are stored, and a STREAM directory in which MPEG2-formattedA/V stream clip files (*.m2ts), corresponding to the clip information files, are stored.
The STREAM directory includes MPEG2-formatted A/V stream files called clips. The STREAM directory may also include a special type of clip referred to as a bridge-clip A/V stream file. A
bridge-clip is used for making seamless connection between two or more presentation intervals selected in the clips, and generally have a small data size compared to the clips. The A/V stream includes source packets of video and audio data. For example, a source packet of video data includes a header and a transport packet. A source packet includes a source packet number, which is generally a sequentially assigned number that serves as an n address for accessing the source packet. Transport packets include a packet identifier (PID). The PID identifies the sequence of transport packets to which a transport packet belongs. Each transport packet in the sequence will have the same PID.
The CLIPINF directory includes a clip information file associated with each A/V stream file. The clip information file indicates, among other things, the type of A/V stream associated therewith, sequence information, program information and timing information. The sequence information describes the arrival time basis (ATC) and system time basis (STC) sequences. For example, the sequence information indicates, among other things, the number of sequences, the beginning and ending time information for each
In order that the invention may be fully understood, preferred embodiments thereof will now be described with reference to the accompanying drawings.
A high-density optical disk, for example, a Blu-ray ROM
(BD-ROM) in accordance with the present invention may have a file or data structure for managing reproduction of video and audio data as shown in Fig. 2. Many aspects of the data structure according to the present invention shown in Fig. 2 are similar to that of the BD-RW standard discussed with respect to Fig. 1. As such these aspects will not be described in great detail.
As shown in Fig. 2, the root directory contains at least one DVP directory. The DVP directory includes a general information file info.dvp, menu files menu.tidx, menu.tdt1 among others, a PLAYLIST directory in which playlist files (e.g., real (*.rpls) and virtual (*.vpls)) are stored, a CLIPINF directory in which clip information files (*.clpi) are stored, and a STREAM directory in which MPEG2-formattedA/V stream clip files (*.m2ts), corresponding to the clip information files, are stored.
The STREAM directory includes MPEG2-formatted A/V stream files called clips. The STREAM directory may also include a special type of clip referred to as a bridge-clip A/V stream file. A
bridge-clip is used for making seamless connection between two or more presentation intervals selected in the clips, and generally have a small data size compared to the clips. The A/V stream includes source packets of video and audio data. For example, a source packet of video data includes a header and a transport packet. A source packet includes a source packet number, which is generally a sequentially assigned number that serves as an n address for accessing the source packet. Transport packets include a packet identifier (PID). The PID identifies the sequence of transport packets to which a transport packet belongs. Each transport packet in the sequence will have the same PID.
The CLIPINF directory includes a clip information file associated with each A/V stream file. The clip information file indicates, among other things, the type of A/V stream associated therewith, sequence information, program information and timing information. The sequence information describes the arrival time basis (ATC) and system time basis (STC) sequences. For example, the sequence information indicates, among other things, the number of sequences, the beginning and ending time information for each
6 sequence, the address of the first source packet in each sequence and the PID of the transport packets in each sequence. A sequence of source packets in which the contents of a program is constant is called a program sequence. The program information indicates, among other things, the number of program sequences, the starting address for each program sequence, and the PID(s) of transport packets in a program sequence.
The timing information is referred to as characteristic point information (CPI) . One form of CPI is the entry point (EP) map.
The EP map maps a presentation time stamp (e.g., on an arrival time basis (ATC) and/or a system time basis (STC) ) to a source packet address (i.e., source packet number) .
The PLAYLIST directory includes one or more playlist files.
The concept of a playlist has been introduced to promote ease of editing/assembling clips for playback. A playlist file is a collection of playing intervals in the clips. Each playing interval is referred to as a playitem. The playlist file, among other things, identifies each playitem forming the playlist, and each pla.yitem, among other things, is a pair of IN-point and OUT-point that point to positions on a time axis of the clip (e.g., presentation time stamps on an ATC or STC basis) . Expressed in another way, the playlist file identifies playitems, each playitem points to a clip or portion thereof and identifies the clip information file associated with the clip. The clip information file is used, among other things, to map the playitems to the clip of source packets.
A playlist directory may include real playlists (*.rpls) and virtual playlists (*.vpls) . A real playlist can only use clips and not bridge-clips. Namely, the real play list is considered as referring to parts of clips, and therefore, conceptually considered equivalent in disk space to the referred to parts of the clips. A
virtual playlist can use both clips and bridge-clips, and therefore, the conceptual considerations of a real playlist do not exist with virtual playlists.
The timing information is referred to as characteristic point information (CPI) . One form of CPI is the entry point (EP) map.
The EP map maps a presentation time stamp (e.g., on an arrival time basis (ATC) and/or a system time basis (STC) ) to a source packet address (i.e., source packet number) .
The PLAYLIST directory includes one or more playlist files.
The concept of a playlist has been introduced to promote ease of editing/assembling clips for playback. A playlist file is a collection of playing intervals in the clips. Each playing interval is referred to as a playitem. The playlist file, among other things, identifies each playitem forming the playlist, and each pla.yitem, among other things, is a pair of IN-point and OUT-point that point to positions on a time axis of the clip (e.g., presentation time stamps on an ATC or STC basis) . Expressed in another way, the playlist file identifies playitems, each playitem points to a clip or portion thereof and identifies the clip information file associated with the clip. The clip information file is used, among other things, to map the playitems to the clip of source packets.
A playlist directory may include real playlists (*.rpls) and virtual playlists (*.vpls) . A real playlist can only use clips and not bridge-clips. Namely, the real play list is considered as referring to parts of clips, and therefore, conceptually considered equivalent in disk space to the referred to parts of the clips. A
virtual playlist can use both clips and bridge-clips, and therefore, the conceptual considerations of a real playlist do not exist with virtual playlists.
7
8 PCT/KR2003/001276 The info . dvp file is a general information file that provides general information for managing the reproduction of the A/V streams recorded on the optical disk. More specifically, the info. dvp. file includes, among other things, a table of playlists that identifies the file names of the playlists in the PLAYLIST directory. The info. dvp file will be discussed in greater detail below with respect to the embodiments of the present invention.
In addition to illustrating the data structure of the recording medium according to an embodiment of the present invention, Fig.
2 represents the areas of the recording medium. For example, the general information file is recorded in one or more general information areas, the playlist directory is recorded in one or more playlist directory areas, each playlist in a playlist directory is recorded in one or more playlist areas of the recording medium, etc.
Fig. 3 illustrates an example of a recording medium having the data structure of Fig. 2 stored thereon. As shown, the recording medium includes a file system information area, a data base area and an A/V stream area. The data base area includes a general information file and playlist information area and a clip information area. The general information file and playlist information area have the general information file recorded in a general information file area thereof, and the PLAYLIST directory and playlist files recorded in a playlist information area thereof. The clip information area has the CLIPINFO directory and associated clip information files recorded therein. The A/V stream area has the A/V streams for the various titles recorded therein.
Video and audio data are typically organized as individual titles; for example, different movies represented by the video and audio data are organized as different titles. Furthermore, a title may be organized into individual chapters in much the same way a book is often organized into chapters.
Because of the large storage capacity of the newer, high-density recording media such as BD-ROM optical disks, different titles, various versions of a title or portions of a title may be recorded, and therefore, reproduced from the recording media. For example, video data representing different camera angles may be recorded on the recording medium. As another example, versions of title or portions thereof associated with different languages may be recorded on the recording medium. As a still further example, a director's version and a theatrical version of a title may be recorded on the recording medium. Or, an adult version, young adult version and young child version (i.e., different parental control versions) of a title or portions of a title may be recorded on the recording medium. Each version represents a different reproduction path, and the video data in these instances is referred to as multiple reproduction path video data. It will be appreciated that the above examples of multiple reproduction path video data are not limiting, and the present invention is applicable to any type or combination of types of multiple reproduction path video data. As will be described in detail below with respect to embodiments of the present invention, the data structures according to the present invention include path management information and/or navigation information for managing reproduction of multiple reproduction path video data recorded on the recording medium.
Fig. 4 shows a Self-Encoded Format Transport Stream (SESF) having a plurality of SEFS capsules. Each of the SEFS capsules has a TIP source packet, followed by a multiplexing unit of video data packets "V". One constrained SEFS TS consists of one or more SESF
capsules, and each SESP capsule starts with a SESF TIP packet. Every TIP contains audio or video stream information for succeeding source packets. The audio/video stream also contains a program map table (PMT) , that is a TS packet that contains the PIDs for each of the elementary streams. A program association table (PAT) , which is also a TS packet, carries the PIDs that identify various PMTs.
Fig. 5 illustrates a portion of the clip information file according to an embodiment of the present invention. As shown, the
In addition to illustrating the data structure of the recording medium according to an embodiment of the present invention, Fig.
2 represents the areas of the recording medium. For example, the general information file is recorded in one or more general information areas, the playlist directory is recorded in one or more playlist directory areas, each playlist in a playlist directory is recorded in one or more playlist areas of the recording medium, etc.
Fig. 3 illustrates an example of a recording medium having the data structure of Fig. 2 stored thereon. As shown, the recording medium includes a file system information area, a data base area and an A/V stream area. The data base area includes a general information file and playlist information area and a clip information area. The general information file and playlist information area have the general information file recorded in a general information file area thereof, and the PLAYLIST directory and playlist files recorded in a playlist information area thereof. The clip information area has the CLIPINFO directory and associated clip information files recorded therein. The A/V stream area has the A/V streams for the various titles recorded therein.
Video and audio data are typically organized as individual titles; for example, different movies represented by the video and audio data are organized as different titles. Furthermore, a title may be organized into individual chapters in much the same way a book is often organized into chapters.
Because of the large storage capacity of the newer, high-density recording media such as BD-ROM optical disks, different titles, various versions of a title or portions of a title may be recorded, and therefore, reproduced from the recording media. For example, video data representing different camera angles may be recorded on the recording medium. As another example, versions of title or portions thereof associated with different languages may be recorded on the recording medium. As a still further example, a director's version and a theatrical version of a title may be recorded on the recording medium. Or, an adult version, young adult version and young child version (i.e., different parental control versions) of a title or portions of a title may be recorded on the recording medium. Each version represents a different reproduction path, and the video data in these instances is referred to as multiple reproduction path video data. It will be appreciated that the above examples of multiple reproduction path video data are not limiting, and the present invention is applicable to any type or combination of types of multiple reproduction path video data. As will be described in detail below with respect to embodiments of the present invention, the data structures according to the present invention include path management information and/or navigation information for managing reproduction of multiple reproduction path video data recorded on the recording medium.
Fig. 4 shows a Self-Encoded Format Transport Stream (SESF) having a plurality of SEFS capsules. Each of the SEFS capsules has a TIP source packet, followed by a multiplexing unit of video data packets "V". One constrained SEFS TS consists of one or more SESF
capsules, and each SESP capsule starts with a SESF TIP packet. Every TIP contains audio or video stream information for succeeding source packets. The audio/video stream also contains a program map table (PMT) , that is a TS packet that contains the PIDs for each of the elementary streams. A program association table (PAT) , which is also a TS packet, carries the PIDs that identify various PMTs.
Fig. 5 illustrates a portion of the clip information file according to an embodiment of the present invention. As shown, the
9 EP map for one stream PID entry is used to populate a table of PTS
_ _ _ _ _ values and addresses for packets having the same PID in a single elementary stream. These tables collectively define an EP map that is part of the data structure's characteristic point information (CPI) that relates the time information in the AV stream with the address information in the AV stream.
' In order to reduce the size of the table and to improve the searching performance of the system, the EP_map_for_one_stream_PID
is divided into two sub tables: EP coarse and EP fine. EP fine _ _ _ contains the least significant bits (LSB) from the presentation time stamp start and the source packet number start for each of the packets associated with a PID. EP coarse refers to EP fine and contains _ _ the most significant bits (MSB) of the presentation time stamp start, the source packet number and the EP fine number that corresponds to the EP coarse entry having the same presentation time stamp start.
_ The number of entries in the EP _coarse sub table is comparatively less than the EP fine sub table.
_ The entry map for EP_map_for_one_stream_PID stores the presentation time stream entry point (PTS_EP_start) and the entry point of address (SPN_EP_start) to manage source packets in an audio/video stream corresponding to the same PID.
The EP fine table start address is the start address of the _ _ _ _ first EP_video_type_(EP_fine_id) field in relative byte number from the first byte of the EP_map_for_one_stream_PID() .
The ref _ to _ EP fine id is the EP fine entry number that contains the _ _ _ PTS EP fine that relates to the PTS EP coarse immediately following _ _ _ _ this field. PTS _ EP_ coarse and SPN EP coarse are both derived from _ _ the PTS _ EP start for the entry point.
_ For each EP map entry, the combination of the EP_video_type (EP fine_id) and I end offset (EP fine id) defines _ _ _ _ _ various conditions. For example, if the I_end_position_off set (EP_fine_id) set to a value other than "000", for particular video types, this indicates that the offset address of the end of a video access unit that includes an I -picture pointed to by the SPN EP start.
Fig. 6 shows possible combinations of some of the foregoing parameters stored in the EP map that may be used to set certain conditions in the data structure such as a change angle request.
In Fig. 6, the various factors shown include the EP_video_type (EP fine id) , I end_position offset (EP fine id) , PTS EP fine _ and SPN EP fine.
_ _ Where the EP_video_type is set to "0", the PTS_EP_fine and the SPN Entry fine become the values that correspond to TIP packet start SPN of the head of the SESF capsule.
In the second condition, the EP_video_type is set to "1" and the I end position offset is set to "000" . The PTS EP fine and the _ _ _ _ SPN EP fine are placed into the values that correspond to first _ _ I-Picture end relative to source packet number (first I-end relative SPN) .
In the third condition, the I-Picture end position offset is '001', the PTS_EP_fine and the SPN_EP_fine become the values that correspond to the first P-picture end relative source packet number (first_P_end_relative_SPN) ; and when the I-picture end position offset is '010', the PTS_EP_fine and the SPN_EP_fine become the values that correspond to the second P-picture end relative source packet number (second_P_end_relative SPN) .
In the fourth condition, when the I-picture end position offset is '100', the PTS_EP_fine and the SPN_EP_fine become the values that correspond to the Angle Change (or AC) or the Interleaved Unit end relative source packet number (ILVU_end_relative_SPN) . Namely, this confirms where an angle change is permitted.
Each of the aforementioned conditions are offered to show a more efficient method of recording, reproducing and managing of data on a optical disk by recording certain information in an EP map and using this information to determine critical points in the data structure.
Fig. 7 illustrates a schematic diagram of an embodiment of an optical disk recording and reproducing apparatus according to the present invention. As shown, an AV encoder 9 receives and encodes audio and video data. The AV encoder 9 outputs the encoded audio and video data along with coding information and stream attribute information. A multiplexer 8 multiplexes the encoded audio and video data based on the coding information and stream attribute information to create, for example, an MPEG2 transport stream. A source packetizer 7 packetizes the transport packets from the multiplexer 8 into source packets in accordance with the audio/video format of the optical disk. As shown in Fig. 7, the operations of the AV encoder 9, the multiplexer 8 and the source packetizer 7 are controlled by a controller 10. The controller 10 receives user input on the recording operation, and provides control information to AV encoder 9, multiplexer 8 and the source packetizer 7. For example, the controller 10 instructs the AV encoder 9 on the type of encoding to perform, instructs the multiplexer 8 on the transport stream to create, and instructs the source packetizer 7 on the source packet format. The controller 10 further controls a drive 3 to record the output from the source packetizer 7 on the optical disk.
The controller 10 also creates the navigation and management information for managing reproduction of the audio/video data being recorded on the optical disk. For example, based on information received via the user interface (e.g., instruction set saved on disk, provided over an intranet or internet by a computer system, etc.) , the controller 10 controls the drive 3 to record the data structure of Figs. 2, 3, 5 or 6 on the optical disk.
During reproduction, the controller 10 controls the drive 3 to reproduce this data structure. Based on the information contained therein, as well as user input received over the user interface (e.g., control buttons on the recording and reproducing apparatus or a remote associated with the apparatus) , the controller controls the drive 3 to reproduce the audio/video source packets from the optical disk. For example, the user input may specify a path to reproduce. This user input may be specified, for example, via a menu based graphical user interface preprogrammed into the 5 controller 10. Using the user input and the path management information reproduced from the optical disk, the controller 10 controls the reproduction of the specified path.
For example, to execute an angle change, a user inputs a request for an angle change via the user interface into the controller 10.
_ _ _ _ _ values and addresses for packets having the same PID in a single elementary stream. These tables collectively define an EP map that is part of the data structure's characteristic point information (CPI) that relates the time information in the AV stream with the address information in the AV stream.
' In order to reduce the size of the table and to improve the searching performance of the system, the EP_map_for_one_stream_PID
is divided into two sub tables: EP coarse and EP fine. EP fine _ _ _ contains the least significant bits (LSB) from the presentation time stamp start and the source packet number start for each of the packets associated with a PID. EP coarse refers to EP fine and contains _ _ the most significant bits (MSB) of the presentation time stamp start, the source packet number and the EP fine number that corresponds to the EP coarse entry having the same presentation time stamp start.
_ The number of entries in the EP _coarse sub table is comparatively less than the EP fine sub table.
_ The entry map for EP_map_for_one_stream_PID stores the presentation time stream entry point (PTS_EP_start) and the entry point of address (SPN_EP_start) to manage source packets in an audio/video stream corresponding to the same PID.
The EP fine table start address is the start address of the _ _ _ _ first EP_video_type_(EP_fine_id) field in relative byte number from the first byte of the EP_map_for_one_stream_PID() .
The ref _ to _ EP fine id is the EP fine entry number that contains the _ _ _ PTS EP fine that relates to the PTS EP coarse immediately following _ _ _ _ this field. PTS _ EP_ coarse and SPN EP coarse are both derived from _ _ the PTS _ EP start for the entry point.
_ For each EP map entry, the combination of the EP_video_type (EP fine_id) and I end offset (EP fine id) defines _ _ _ _ _ various conditions. For example, if the I_end_position_off set (EP_fine_id) set to a value other than "000", for particular video types, this indicates that the offset address of the end of a video access unit that includes an I -picture pointed to by the SPN EP start.
Fig. 6 shows possible combinations of some of the foregoing parameters stored in the EP map that may be used to set certain conditions in the data structure such as a change angle request.
In Fig. 6, the various factors shown include the EP_video_type (EP fine id) , I end_position offset (EP fine id) , PTS EP fine _ and SPN EP fine.
_ _ Where the EP_video_type is set to "0", the PTS_EP_fine and the SPN Entry fine become the values that correspond to TIP packet start SPN of the head of the SESF capsule.
In the second condition, the EP_video_type is set to "1" and the I end position offset is set to "000" . The PTS EP fine and the _ _ _ _ SPN EP fine are placed into the values that correspond to first _ _ I-Picture end relative to source packet number (first I-end relative SPN) .
In the third condition, the I-Picture end position offset is '001', the PTS_EP_fine and the SPN_EP_fine become the values that correspond to the first P-picture end relative source packet number (first_P_end_relative_SPN) ; and when the I-picture end position offset is '010', the PTS_EP_fine and the SPN_EP_fine become the values that correspond to the second P-picture end relative source packet number (second_P_end_relative SPN) .
In the fourth condition, when the I-picture end position offset is '100', the PTS_EP_fine and the SPN_EP_fine become the values that correspond to the Angle Change (or AC) or the Interleaved Unit end relative source packet number (ILVU_end_relative_SPN) . Namely, this confirms where an angle change is permitted.
Each of the aforementioned conditions are offered to show a more efficient method of recording, reproducing and managing of data on a optical disk by recording certain information in an EP map and using this information to determine critical points in the data structure.
Fig. 7 illustrates a schematic diagram of an embodiment of an optical disk recording and reproducing apparatus according to the present invention. As shown, an AV encoder 9 receives and encodes audio and video data. The AV encoder 9 outputs the encoded audio and video data along with coding information and stream attribute information. A multiplexer 8 multiplexes the encoded audio and video data based on the coding information and stream attribute information to create, for example, an MPEG2 transport stream. A source packetizer 7 packetizes the transport packets from the multiplexer 8 into source packets in accordance with the audio/video format of the optical disk. As shown in Fig. 7, the operations of the AV encoder 9, the multiplexer 8 and the source packetizer 7 are controlled by a controller 10. The controller 10 receives user input on the recording operation, and provides control information to AV encoder 9, multiplexer 8 and the source packetizer 7. For example, the controller 10 instructs the AV encoder 9 on the type of encoding to perform, instructs the multiplexer 8 on the transport stream to create, and instructs the source packetizer 7 on the source packet format. The controller 10 further controls a drive 3 to record the output from the source packetizer 7 on the optical disk.
The controller 10 also creates the navigation and management information for managing reproduction of the audio/video data being recorded on the optical disk. For example, based on information received via the user interface (e.g., instruction set saved on disk, provided over an intranet or internet by a computer system, etc.) , the controller 10 controls the drive 3 to record the data structure of Figs. 2, 3, 5 or 6 on the optical disk.
During reproduction, the controller 10 controls the drive 3 to reproduce this data structure. Based on the information contained therein, as well as user input received over the user interface (e.g., control buttons on the recording and reproducing apparatus or a remote associated with the apparatus) , the controller controls the drive 3 to reproduce the audio/video source packets from the optical disk. For example, the user input may specify a path to reproduce. This user input may be specified, for example, via a menu based graphical user interface preprogrammed into the 5 controller 10. Using the user input and the path management information reproduced from the optical disk, the controller 10 controls the reproduction of the specified path.
For example, to execute an angle change, a user inputs a request for an angle change via the user interface into the controller 10.
10 The controller 10 then determines the number of reproduction paths, and that the user has requested an angle change. The controller 10 also determines if the user' s request is permitted by referencing the EP map. Depending on the information stored in the EP map, the change angle request may be immediately processed, delayed and/or refused.
The reproduced source packets are received by a source depacketizer 4 and converted into a data stream (e.g., an MPEG-2 transport packet stream) . A demultiplexer 5 demultiplexes the data stream into encoded video and audio data. An AV decoder 6 decodes the encoded video and audio data to produce the original audio and video data that was fed to the AV encoder 9. During reproduction, the controller 10 controls the operation of the source depacketizer 4, demultiplexer 5 and AV decoder 6. The controller 10 receives user input on the reproducing operation, and provides control information to AV decoder 6, demultiplexer 5 and the source packetizer 4. For example, the controller 10 instructs the AV
decoder 9 on the type of decoding to perform, instructs the demultiplexer 5 on the transport stream to demultiplex, and instructs the source depacketizer 4 on the source packet format.
While Fig. 7 has been described as a recording and reproducing apparatus, it will be understood that only a recording or only a reproducing apparatus may be provided using those portions of Fig.
8 providing the recording or reproducing function.
Fig. 8 illustrates application of the described data management system for executing an angle change by detecting a flag recorded in the EP_map_for_one_stream_PID. As shown in Fig. 8, multiple reproduction path data are recorded in the unit of Angle Block which is divided by the fourth condition of Fig. 6 in which the PTS_EP_fine and the SPN_EP_fine have the values that correspond to the Angle Change (or AC) or the Interleaved Unit end relative source packet number (ILVU_end_relative_SPN). The data for one reproduction path are recorded as one or more Angle Blocks, and the Angle Blocks are interleaved.
When a user requests an angle change to a second angle Angle 2 while playing the data stream of a first angle Angle 1, an angle change may only be executed when a predetermined condition exists for selected parameters as recorded in the EP map as discussed in detail below.
In this example, upon receiving the angle change request, the system reviews the EP map to determine if the angle change request is permitted. By comparing the address information for the audio/video stream with the information stored in the EP, the system determines that address information does not correspond to condition 4 in Fig. 6, i.e., the angle change request does not occur at permitted angle point. As illustrated in Fig. 8, the angle change request is delayed until the system reaches the end of the Angle Block, and condition 4 of Fig. 6 is met, that permits processing of the angle change. Upon execution of the angle change request, the system skips to Angle Block 2 in the AA/ stream to the SPNI_start address for the requested angle, in this case, the second data block of Angle Block (Angle 2).
Although the detailed description of the invention has been directed to certain exemplary embodiments, various modifications of these embodiments, as well as alternative embodiments, will be suggested to those skilled in the art. The invention encompasses any modifications or alternative embodiments that fall within the scope of the claims.
The reproduced source packets are received by a source depacketizer 4 and converted into a data stream (e.g., an MPEG-2 transport packet stream) . A demultiplexer 5 demultiplexes the data stream into encoded video and audio data. An AV decoder 6 decodes the encoded video and audio data to produce the original audio and video data that was fed to the AV encoder 9. During reproduction, the controller 10 controls the operation of the source depacketizer 4, demultiplexer 5 and AV decoder 6. The controller 10 receives user input on the reproducing operation, and provides control information to AV decoder 6, demultiplexer 5 and the source packetizer 4. For example, the controller 10 instructs the AV
decoder 9 on the type of decoding to perform, instructs the demultiplexer 5 on the transport stream to demultiplex, and instructs the source depacketizer 4 on the source packet format.
While Fig. 7 has been described as a recording and reproducing apparatus, it will be understood that only a recording or only a reproducing apparatus may be provided using those portions of Fig.
8 providing the recording or reproducing function.
Fig. 8 illustrates application of the described data management system for executing an angle change by detecting a flag recorded in the EP_map_for_one_stream_PID. As shown in Fig. 8, multiple reproduction path data are recorded in the unit of Angle Block which is divided by the fourth condition of Fig. 6 in which the PTS_EP_fine and the SPN_EP_fine have the values that correspond to the Angle Change (or AC) or the Interleaved Unit end relative source packet number (ILVU_end_relative_SPN). The data for one reproduction path are recorded as one or more Angle Blocks, and the Angle Blocks are interleaved.
When a user requests an angle change to a second angle Angle 2 while playing the data stream of a first angle Angle 1, an angle change may only be executed when a predetermined condition exists for selected parameters as recorded in the EP map as discussed in detail below.
In this example, upon receiving the angle change request, the system reviews the EP map to determine if the angle change request is permitted. By comparing the address information for the audio/video stream with the information stored in the EP, the system determines that address information does not correspond to condition 4 in Fig. 6, i.e., the angle change request does not occur at permitted angle point. As illustrated in Fig. 8, the angle change request is delayed until the system reaches the end of the Angle Block, and condition 4 of Fig. 6 is met, that permits processing of the angle change. Upon execution of the angle change request, the system skips to Angle Block 2 in the AA/ stream to the SPNI_start address for the requested angle, in this case, the second data block of Angle Block (Angle 2).
Although the detailed description of the invention has been directed to certain exemplary embodiments, various modifications of these embodiments, as well as alternative embodiments, will be suggested to those skilled in the art. The invention encompasses any modifications or alternative embodiments that fall within the scope of the claims.
Claims (29)
1. A recording medium having a data structure for managing reproduction of at least video data having multiple reproduction path recorded on the recording medium, comprising:
at least one navigation area storing navigation management information for managing reproduction of the video data having multiple reproduction path recorded on the recording medium, the video data being stored in clip files, each navigation management information associated with one of the clip files, each clip file of the multiple reproduction paths being associated with one of the multiple reproduction paths, said navigation management information having angle change information corresponding to each of a plurality of video data blocks, wherein said angle change information indicates whether an angle change is permitted or not, and the angle change information further indicates where the angle change is permitted, the angle change from a current angle to a requested angle is performed if the angle change is permitted, and the current angle is maintained until a position at which exit of the current angle is permitted.
at least one navigation area storing navigation management information for managing reproduction of the video data having multiple reproduction path recorded on the recording medium, the video data being stored in clip files, each navigation management information associated with one of the clip files, each clip file of the multiple reproduction paths being associated with one of the multiple reproduction paths, said navigation management information having angle change information corresponding to each of a plurality of video data blocks, wherein said angle change information indicates whether an angle change is permitted or not, and the angle change information further indicates where the angle change is permitted, the angle change from a current angle to a requested angle is performed if the angle change is permitted, and the current angle is maintained until a position at which exit of the current angle is permitted.
2. The recording medium of claim 1, wherein the navigation management information includes an entry point map, the entry point map including the angle change information.
3. The recording medium of claim 1, wherein said navigation management information includes an entry point corresponding to one of said plurality of video data blocks.
4. The recording medium of claim 1, wherein said navigation management information includes a start point of a presentation time stamp, said start point of a presentation time stamp is corresponding to one of said plurality of video data blocks.
5. The recording medium of claim 1, wherein said navigation management information includes source packet identification information for a corresponding one of said plurality of video data blocks.
6. The recording medium of claim 1, wherein said navigation information includes an entry point in a video stream to a corresponding one of said plurality of video data blocks.
7. The recording medium of claim 1, wherein said navigation management information includes an indicator for indicating a stream type information of video data, said indicator is corresponding to one of said plurality of video data blocks.
8. The recording medium of claim 1, wherein said navigation management information includes offset information regarding I-picture pointing to an address of a last I-picture contained, said offset information is corresponding to one of said plurality of video data blocks.
9. The recording medium of claim 1, wherein said navigation management information includes an entry point corresponding to one of said plurality of video data blocks, a start point of a presentation time stamp corresponding to one of said plurality of video data blocks, a source packet number corresponding to one of said plurality of video data blocks, an entry point corresponding to one of said plurality of video data blocks, video stream type information corresponding to one of said plurality of video data blocks, and an I-picture offset information pointing to an address of a last I-picture contained in a corresponding one of said plurality of video data blocks.
10. The recording medium of claim 2, wherein said angle change information corresponding to each of a plurality of video data blocks is included in the entry point map.
11. The recording medium of claim 1, wherein said angle change information corresponding to each of a plurality of video data blocks includes the address of the last interleaved video unit in the corresponding video data block.
12. The recording medium of claim 1, wherein said video data having multiple reproduction path are recorded in the unit of angle block which is referred by angle change information.
13. The recording medium of claim 12, wherein data for each reproduction path data are recorded as one or more angle blocks and the angle blocks are interleaved.
14. A method of recording a data structure for managing reproduction of at least video data having multiple reproduction path on a recording medium, comprising:
generating navigation management information for managing reproduction of the video data having multiple reproduction path in at least one navigation area of the recording medium, the video data being stored in clip files, each navigation management information associated with one of the clip files, each clip file of the multiple reproduction paths being associated with one of the multiple reproduction paths, said navigation management information having a plurality of angle change information corresponding to each of a plurality of video data blocks, recording the navigation management information in the navigation area of the recording medium, wherein said angle change information indicates whether an angle change is permitted or not, and the angle change information further indicates where the angle change is permitted, the angle change from a current angle to a requested angle is performed if the angle change is permitted, and the current angle is maintained until a position at which exit of the current angle is permitted.
generating navigation management information for managing reproduction of the video data having multiple reproduction path in at least one navigation area of the recording medium, the video data being stored in clip files, each navigation management information associated with one of the clip files, each clip file of the multiple reproduction paths being associated with one of the multiple reproduction paths, said navigation management information having a plurality of angle change information corresponding to each of a plurality of video data blocks, recording the navigation management information in the navigation area of the recording medium, wherein said angle change information indicates whether an angle change is permitted or not, and the angle change information further indicates where the angle change is permitted, the angle change from a current angle to a requested angle is performed if the angle change is permitted, and the current angle is maintained until a position at which exit of the current angle is permitted.
15. A method of reproducing a data structure for managing reproduction of at least video data having multiple reproduction path on a recording medium, the steps comprising:
reproducing navigation management information for managing reproduction of the video data having multiple reproduction path from at least one navigation area of the recording medium, the video data being stored in clip files, each navigation management information associated with one of the clip files, each clip file of the multiple reproduction paths being associated with one of the multiple reproduction paths, said navigation management information having a plurality of angle change information corresponding to each of a plurality of video data blocks, controlling reproduction of the video data having multiple reproduction path according to said navigation management information, wherein said angle change information indicates whether an angle change is permitted or not, and the angle change information further indicates where the angle change is permitted, the angle change from a current angle to a requested angle is performed if the angle change is permitted, and the current angle is maintained until a position at which exit of the current angle is permitted.
reproducing navigation management information for managing reproduction of the video data having multiple reproduction path from at least one navigation area of the recording medium, the video data being stored in clip files, each navigation management information associated with one of the clip files, each clip file of the multiple reproduction paths being associated with one of the multiple reproduction paths, said navigation management information having a plurality of angle change information corresponding to each of a plurality of video data blocks, controlling reproduction of the video data having multiple reproduction path according to said navigation management information, wherein said angle change information indicates whether an angle change is permitted or not, and the angle change information further indicates where the angle change is permitted, the angle change from a current angle to a requested angle is performed if the angle change is permitted, and the current angle is maintained until a position at which exit of the current angle is permitted.
16. An apparatus for recording a data structure for managing reproduction of at least video data having multiple reproduction path recorded on a recording medium, comprising:
a recording unit configured to record data on the recording medium;
a controller, operably coupled to the recording unit, configured to control the recording unit to record navigation management information for managing reproduction of the video data having multiple reproduction path in at least one navigation area of the recording medium, the video data being stored in clip files, each navigation management information associated with one of the clip files, each clip file of the multiple reproduction paths being associated with one of the multiple reproduction paths, said navigation management information having a plurality of angle change information corresponding to each of a plurality of video data block, wherein said angle change information indicates whether an angle change is permitted or not, and the angle change information further indicates where the angle change is permitted, the angle change from a current angle to a requested angle is performed if the angle change is permitted, and the current angle is maintained until a position at which exit of the current angle is permitted.
a recording unit configured to record data on the recording medium;
a controller, operably coupled to the recording unit, configured to control the recording unit to record navigation management information for managing reproduction of the video data having multiple reproduction path in at least one navigation area of the recording medium, the video data being stored in clip files, each navigation management information associated with one of the clip files, each clip file of the multiple reproduction paths being associated with one of the multiple reproduction paths, said navigation management information having a plurality of angle change information corresponding to each of a plurality of video data block, wherein said angle change information indicates whether an angle change is permitted or not, and the angle change information further indicates where the angle change is permitted, the angle change from a current angle to a requested angle is performed if the angle change is permitted, and the current angle is maintained until a position at which exit of the current angle is permitted.
17. An apparatus for reproducing a data structure for managing reproduction of at least video data having multiple reproduction path recorded on a recording medium, comprising:
a reproducing unit configured to reproduce data recorded on the recording medium;
a controller, operably coupled to the reproduction unit, configured to control the reproducing unit to reproduce navigation management information for managing reproduction of the video data having multiple reproduction path from at least one navigation area of the recording medium, the video data being stored in clip files, each navigation management information associated with one of the clip files, each clip file of the multiple reproduction paths being associated with one of the multiple reproduction paths, the controller configured to control the reproducing unit to execute an angle change if an angle change authorization is detected in the navigation management information, wherein said angle change information indicates whether an angle change is permitted or not, and the angle change information further indicates where the angle change is permitted, the angle change from a current angle to a requested angle is performed if the angle change is permitted, and the current angle is maintained until a position at which exit of the current angle is permitted.
a reproducing unit configured to reproduce data recorded on the recording medium;
a controller, operably coupled to the reproduction unit, configured to control the reproducing unit to reproduce navigation management information for managing reproduction of the video data having multiple reproduction path from at least one navigation area of the recording medium, the video data being stored in clip files, each navigation management information associated with one of the clip files, each clip file of the multiple reproduction paths being associated with one of the multiple reproduction paths, the controller configured to control the reproducing unit to execute an angle change if an angle change authorization is detected in the navigation management information, wherein said angle change information indicates whether an angle change is permitted or not, and the angle change information further indicates where the angle change is permitted, the angle change from a current angle to a requested angle is performed if the angle change is permitted, and the current angle is maintained until a position at which exit of the current angle is permitted.
18. The method of claim 14, wherein said generating step includes generating said navigation management information including an entry point map, the entry point map including the angle change information.
19. The method of claim 14, wherein said generating step includes encoding at least video data and multiplexing at least video data to create a transport stream.
20. The method of claim 19, wherein said generating step further includes packetizing the transport stream into source packets in accordance with a format of optical disk.
21. The method of claim 15, wherein the controlling step includes analyzing the angle change information if the angle change is requested via an interface, and selectively changing the reproduction path based on the analyzed angle change information.
22. The method of claim 15, wherein the controlling step includes referring to an entry point map within said navigation management information to determine if a request for angle change is permitted or not, the entry point map including one or more entry points corresponding to one of said plurality of video data blocks, the entry point map including the angle change information.
23. The apparatus of claim16, wherein said controller is configured to create said navigation management information based on a reference information received via a interface, said navigation management information including an entry point map for accessing the corresponding video block, the entry point map having one or more entry points corresponding to one of said plurality of video data blocks, the entry point map including the angle change information.
24. The apparatus of claim 16, said recording unit comprising:
an encoder configured to encodes at least video data, and a multiplexer configured to multiplex at least video data to create a transport stream according to control information of the controller.
an encoder configured to encodes at least video data, and a multiplexer configured to multiplex at least video data to create a transport stream according to control information of the controller.
25. The apparatus of claim 24, wherein said recording unit further comprising:
a packetizer configured to packetize the transport stream from the multiplexer into source packets in accordance with a format of optical disk, said packetizer is controlled by the controller.
a packetizer configured to packetize the transport stream from the multiplexer into source packets in accordance with a format of optical disk, said packetizer is controlled by the controller.
26. The apparatus of claim 16, further comprising a user interface for receiving the request for the angle change from a user, wherein the controller operably coupled to the user interface, is configured to perform the angle change based on the received request through the user interface.
27. The apparatus of claim 17, further comprises a user interface for receiving the request for the angle change from a user, wherein the controller operably coupled to the user interface, is configured to perform the angle change based on the received request through the user interface.
28. The apparatus of claim 17, wherein said navigation management information includes an entry point map, said entry point map including the angle change information, wherein said controller is configured to analyze the angle change information if the angle change is requested via an interface, and control the reproducing unit to selectively change the reproduction path based on the analyzed angle change information, the angle change information including at least one indicator for indicating whether the angle change is permitted or not.
29. The apparatus of claim 17, wherein said controller is configured to reference an entry point map within said navigation management information to determine if a request for angle change is permitted or not, the entry point map including one or more entry points corresponding to one of said plurality of video data blocks.
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| PCT/KR2003/001276 WO2004003908A1 (en) | 2002-06-28 | 2003-06-28 | Recording medium having data structure for managing recording and reproduction of multiple path data recorded thereon and recording and reproducing methods and apparatus |
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- 2003-06-28 EP EP03761863.4A patent/EP1518240B1/en not_active Expired - Lifetime
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- 2003-06-28 JP JP2004517390A patent/JP4312151B2/en not_active Expired - Fee Related
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| AU2003243049B2 (en) | 2010-03-04 |
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| JP4312151B2 (en) | 2009-08-12 |
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| KR100554767B1 (en) | 2006-02-22 |
| EP1518240A4 (en) | 2008-04-30 |
| CA2459086A1 (en) | 2004-01-08 |
| CN1565031A (en) | 2005-01-12 |
| US20040001700A1 (en) | 2004-01-01 |
| AU2003243049A1 (en) | 2004-01-19 |
| RU2004124945A (en) | 2006-01-20 |
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