WO2004084208A1 - 記録媒体及びその製造方法、再生方法及び再生装置、並びに著作権管理方法 - Google Patents
記録媒体及びその製造方法、再生方法及び再生装置、並びに著作権管理方法 Download PDFInfo
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- WO2004084208A1 WO2004084208A1 PCT/JP2004/003077 JP2004003077W WO2004084208A1 WO 2004084208 A1 WO2004084208 A1 WO 2004084208A1 JP 2004003077 W JP2004003077 W JP 2004003077W WO 2004084208 A1 WO2004084208 A1 WO 2004084208A1
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Classifications
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- G11B20/00166—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised contents recorded on or reproduced from a record carrier, e.g. music or software
- G11B20/00181—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised contents recorded on or reproduced from a record carrier, e.g. music or software using a content identifier, e.g. an international standard recording code [ISRC] or a digital object identifier [DOI]
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Definitions
- the present invention particularly relates to a recording medium for preventing the use of contents such as movies due to illegal duplication, a method for manufacturing the same, a reproducing method and a reproducing apparatus, and a copyright management method.
- DVD-Video adopts CSS (Content Scramble System) as copy protection technology. CSS is only approved for DVD-ROM media, and the use of CSS in recordable DVD such as DVD-R, DVD-RW, DVD + R, DVD + RW is prohibited by CSS contract. Have been. Therefore, copying the entire contents of a DVD-Video that is copyright protected in the CSS format onto a recordable DVD (pit-by-pit copy) is not a permitted activity under the CSS contract.
- CSS Content Scramble System
- CP PM Content Protection for Pre-Recorded Media
- CPRM Content Protection for Recordable Media
- These methods have the feature that when a problem arises in the encryption of content or the storage of management information, etc., the system can be updated, and the reproduction can be restricted even if the entire data is copied.
- the method of copyright protection for DVDs is described in “Yamada,” Expanding the Copyright Protection Space Starting from DVD “, Nikkei Electronics 2001.8.13, p.143-153", and CP RM is licensed. It is described in the "Content Protection for Recordable Media Specification DVD Book, Internet URL: http://www.4Centity.com/> distributed by 4C Entity, LLC, the US administrator.
- a digital movie camera is used to shoot a new movie that will be screened in a movie theater, and this is used as a source to produce DVD-Video that has been turned into ROM. Also, without paying for the value of the film to be shown in the movie theater and without obtaining permission to hold the rights, the telecine work converts it into baseband video signals, and this is a pirated version stored in ROM as a source It is possible to produce DVD-Video.
- Breaking CSS cryptography De CSS software is distributed on Internet and is easily available to anyone, and it can be used to decrypt and encrypt in plaintext. It is possible to write on recordable DVDs. By bringing this content to a DVD manufacturing plant, it is possible to manufacture DVD-Video that has been turned into ROM.
- PCs Personal computers
- CGMSA-A Copy Generation Management System-Analog
- macrovision signals and copy restrictions are effective. Since it does not work, it is possible to input the output from the DVD-Video player to the video capture port built into the PC and copy it to the HDD (Hard Disc Drive). Video data once recorded on the HDD can be written to recordable DVDs in plaintext. By bringing this content to a DVD manufacturing plant, it is also possible to manufacture DVD-Video that has been turned into ROM.
- the purpose of the present invention is to illegally copy video content.
- the invention set forth in claim 1 is a recording medium on which a video content is recorded, wherein the title information indicates the title of the video content or the title information of the title information.
- the title message required to guarantee authenticity is embedded as digital watermark information in the video content data, and the title information or title message is recorded in a recording area different from the area where the data is recorded It is a recording medium.
- the invention according to claim 3 is a recording medium manufacturing method for manufacturing a recording medium on which data of video content is recorded, comprising: an editing step of editing data of video content; and a title of video content.
- the first title recording step of embedding the title information indicating the title or the title message necessary for guaranteeing the authenticity of the title information as digital watermark information in the video content, and the title information or title message
- the invention of claim 6 is characterized in that data of video content is recorded, and title information indicating a title of the video content or a title message necessary for guaranteeing the authenticity of the title information is included in the data of the video content.
- Title information or titles recorded in the recording area A first title information detecting step for detecting a title message, a second title information detecting step for detecting title information or a title message embedded as electronic watermarking information, and first and second title information.
- a judging step for judging whether the authenticity of the title information or title message detected in the detecting step is guaranteed, and restricting a reproducing operation of the recording medium if the authenticity is not guaranteed in the judging step A playback restriction step.
- the invention according to claim 7 is characterized in that data of video content is recorded, and title information indicating a title of the video content or a title message necessary for guaranteeing the authenticity of the title information is data of the video content.
- This is a playback device that plays back a recording medium in which title information or a title message is recorded in a recording area different from the area in which the title information or title message is recorded in the evening, as digital watermark information.
- a first title information detector that detects title information or a title message recorded in a recording area different from the area, and a second title information that detects title information or a title message embedded as digital watermark information Detected by the title information detector and the first and second title information detectors, respectively.
- the invention according to claim 8 is a recording medium on which video content data is recorded, wherein the medium identification information uniquely identifies each recording medium for each series of recording media, and a recording medium to be re-reported.
- a recording medium in which at least a medium relocation list indicating the medium identification information or an identification message necessary for guaranteeing the authenticity of the medium identification information is recorded.
- the invention according to claim 14 is a recording medium manufacturing method for manufacturing a recording medium on which data of video content is recorded, wherein an editing step of editing data of the video content, and At least, a medium for recording medium identification information for uniquely identifying each recording medium for each series of recording media or a medium relocation list indicated by an identification message necessary for guaranteeing the authenticity of the medium identification information
- a recording medium manufacturing method comprising: a list recording step; and an identification information recording step of recording medium identification information of each medium by a method different from a recording method of an area where video data is recorded.
- the invention according to claim 20 is a computer-readable recording medium, comprising: medium identification information for uniquely identifying each recording medium for each of a series of recording media; This is a reproduction method for reproducing a recording medium on which information or a medium revocation list specified by an identification message necessary for guaranteeing the authenticity of the medium identification information is recorded.
- a determining step, if it is determined that should Ripoku in medium squirrel Bok determination step is a reproduction method and a reproduction restriction scan Tetsupu for limiting reproduction operation of the recording medium.
- the invention according to claim 25 is a reproduction method for reproducing a recording medium on which video content data is recorded, and medium identification information for uniquely identifying each recording medium for each series of recording media.
- the media relocation list specified by the identification message necessary for guaranteeing the authenticity of the media identification information is received, and the accumulated media identification information or the identification message of the media identification information is included in the media relocation list.
- the invention according to claim 30 is a reproducing apparatus for reproducing a recording medium on which data of video content is recorded, wherein the medium identification information uniquely identifies each recording medium for each series of recording media.
- a reading unit that reads out the recording medium to be re-read at least with the medium identification information or the medium revocation list that is indicated by an identification message necessary for guaranteeing the authenticity of the medium identification information;
- a medium identification information storage unit that stores an identification message of the medium identification information; a determination unit that determines whether the stored medium identification information or the identification message is included in the medium revocation list;
- a control unit for restricting the reproduction operation of the recording medium when it is determined that the recording medium should be re-reported.
- the invention according to claim 35 is a reproducing apparatus for reproducing a recording medium on which data of video content is recorded, wherein the medium identification information for uniquely identifying each recording medium for each series of recording media is provided.
- the receiving unit, the media list determining unit that determines whether or not the stored media identification information or identification message is included in the received media revocation list, and the media list determining unit determine that the data should be re-reported.
- the playback device has a control unit for limiting the playback operation of the recording medium.
- the invention according to claim 40 is a copyright management method in a system in which a plurality of playback devices and a copyright management server licensed by a copyright manager are connected via a network, In each case, the video content is recorded, and for each series of recording media, the media identification information for uniquely identifying each recording media is reproduced, and the media identification information of the recording media is read out.
- the invention according to claim 41 restricts the reproduction operation in a device having the predetermined mechanism up to the calendar permitted by the copyright manager when generated by the time information and read by the predetermined mechanism
- This is a playback method for playing back a recording medium on which data of video content in which data is embedded as an electronic watermark is recorded, and when the data is played back, the signature is transferred from the recording medium.
- a list of signature data which is calendar information for restricting reproduction, is generated in a device having a predetermined mechanism. It has a list generation step and a certain mechanism as long as it is included in the list.
- the invention according to claim 45 is a playback device for playing back a recording medium on which data of video content is recorded, wherein the playback device is embedded in the data of video content as a digital watermark when played back. Generated based on time information and restricts the playback operation to the calendar permitted by the copyright manager.Signatures that detect dataSignatures and data detectors, and restricts playback based on detected signatures and data A list generation unit that generates a list of signature data, which is calendar information, and, as long as it is included in the list, reproduces the recording media on which the signature * data is recorded up to the calendar permitted by the copyright administrator. A playback device having a control unit for limiting.
- the invention according to claim 49 is a copyright management method in a copyright management system in which a plurality of playback devices and a copyright management server licensed by a copyright manager are connected via a network.
- the signature operation that restricts the playback operation on a device having the specified mechanism up to the calendar permitted by the copyright manager is transmitted electronically to the video content.
- Each device embeds as watermark information and detects signature data when playing back video content.
- Signature data is calendar information that limits playback based on the detected signature data.
- a recording method for embedding title information or a title message in video content data of a recording medium as digital watermark information Recording is performed in a recording area different from the area on the recording medium where the video content is recorded.
- the playback device reads the title information or title message recorded by two different recording methods, respectively, and compares the read title information or title message with each other. , Playback can be restricted.
- the medium identification information for uniquely identifying the recording medium is recorded on the recording medium, and the reproducing apparatus compares the medium identification information with the medium relocation list, so that the medium relocation list is recorded. If the recording medium to be repoked matches the recording medium uniquely identified by the medium identification information, the reproduction can be restricted as an unauthorized recording medium.
- the signature data is embedded as an electronic watermark in the recording medium, and the device is the signature.
- a signature generated by reading data and generating time information in the device. By comparing the data with the list in the evening, if they match, the reproduction can be restricted as an unauthorized recording medium that was reproduced during a period not permitted by the copyright manager.
- FIG. 1 is a schematic diagram showing an example of an entire system configuration (left part) including a digital video disk production process, a production process, and a playback device according to a first embodiment of the present invention.
- FIG. 2 is a schematic diagram showing an example of an entire system configuration (middle part) including a digital video disk production process, a production process, and a playback device according to the first embodiment of the present invention.
- FIG. 3 is a schematic diagram showing an example of an entire system configuration (right part) including a production process, a production process, and a playback device of a digital video disk according to the first embodiment of the present invention.
- Figure 4 shows this FIG.
- FIG. 2 is a schematic diagram illustrating an example of a configuration of a data recording area in a digital video disc according to the first embodiment of the present invention.
- FIG. 5 is a schematic diagram showing an example of a configuration of a digital video disc reproducing apparatus for reproducing a digital video disc according to the first embodiment of the present invention.
- FIG. 6 is a schematic diagram showing the flow of a digital video disc editing and production process according to the first embodiment of the present invention.
- FIG. 7 is a schematic diagram showing a flow of a manufacturing process of the digital video disc according to the first embodiment of the present invention.
- FIG. 8 is a schematic diagram showing a processing flow (first half) in the digital video / disk reproducing apparatus according to the first embodiment of the present invention.
- FIG. 9 is a schematic diagram showing a processing flow (the latter half) in the digital video disk reproducing apparatus according to the first embodiment of the present invention.
- FIG. 10 is a schematic line showing an example of a relationship between a movie screening period, a release period of a regular digital video disk, and a reproduction restriction period of an illegally copied DVD according to the first embodiment of the present invention.
- FIG. 11 is a schematic diagram showing an example of an entire system configuration (left part) including a production process, a production process, and a playback device of a digital video disc according to a second embodiment of the present invention. .
- FIG. 12 is a schematic diagram showing an example of an entire system configuration (middle part) including a digital video / disc production process, a production process, and a playback device according to the second embodiment of the present invention. is there.
- FIG. 13 is a schematic diagram showing an example of an entire system configuration (right portion) including a digital video disk production process, a production process, and a playback device according to the second embodiment of the present invention.
- FIG. 14 is a schematic diagram showing an example of the configuration of a data recording area in a digital video disk according to the second embodiment of the present invention.
- FIG. 15 is a schematic diagram showing an example of the configuration of a digital video disk reproducing apparatus for reproducing a digital video disk according to the second embodiment of the present invention.
- FIG. 13 is a schematic diagram showing an example of an entire system configuration (right portion) including a digital video disk production process, a production process, and a playback device according to the second embodiment of the present invention.
- FIG. 14 is a schematic diagram showing an
- FIG. 16 shows a second embodiment of the present invention.
- FIG. 3 is a schematic diagram showing the flow of a digital video disc editing and production process according to the form.
- FIG. 17 is a schematic diagram showing a flow of a manufacturing process of the digital-video disc according to the second embodiment of the present invention.
- FIG. 18 is a schematic diagram showing a processing flow (first half) in a digital video disk reproducing apparatus according to a second embodiment of the present invention.
- FIG. 19 is a schematic diagram showing a processing flow (the latter half) in the digital video / video disc reproducing apparatus according to the second embodiment of the present invention.
- FIG. 20 is a schematic diagram showing a flow of processing of a film digital watermark check according to the second embodiment of the present invention.
- Figures 1 to 3 show digital video.
- An example of an overall system configuration including a disc production process, a production process, and a playback device is shown. Due to restrictions on the drawing space, the overall system configuration is divided into Fig. 1 to Fig. 3.
- Content owner 10 owns the copyright of the video content and intends to place an order for mass production of digital video discs for the purpose of selling and profiting digital video discs. People or organizations.
- the management mechanism 20 is a management mechanism for copyright protection technology. Upon receiving a request from the content owner 10, it goes to the editing and production process, the manufacturing process, and the playback device of digital video discs under a formal contractual relationship. It is an organization that provides technology and information for operating copyright protection technology, manages parentheses appropriately, and eliminates unauthorized copying of digital 'video' discs.
- the editing and production process 30 is the editing and production process for video content requested by the content owner 10 and is set up in digital video disc editing studios.
- the mass ring process 40 is a process for making a master for mass duplication of digital and video discs, and is installed in a disc manufacturing factory or the like.
- the disk mass production process 50 is a mass production process of digital video discs, and is installed in a disk manufacturing factory or the like.
- Digital video disk 60 is a mass-produced, read-only digital video disk medium in which video and audio signals are mainly recorded.
- Digital video disc playback device 70 is a digital video 'disc 60 playback device.
- Publishing video content 1 1 publishes video content for recording on digital video disc 60. 1 to 3, the video content is transmitted via the management mechanism 20, but it is also possible to directly send the video content from the content owner 10 to the editing and production process 30.
- Investigation of illegal copy distribution 1 2 is the organization for investigating illegal copy distribution.
- the distribution survey of illegal copies here is the act of investigating illegally created and manufactured duplicate media distributed in the market. At present, market research is being conducted by commissioned research companies.
- the issue of the mass production number 13 specifies the mass production number of the digital video disc 60 of the title ordered by the content owner 10.
- FIGS. 1 to 3 although the content is passed through the management mechanism 20, it is also possible for the content owner 10 to directly specify the mass production number in the editing and production process 30.
- GUID 21 issues a global unique ID (GUID; Global Unique ID) distributed for each title.
- GUID Global Unique ID
- the GUID is used as title information indicating the title of the video content.
- the issue of a disc key 22 is one of the key information for deriving the content key, and issues a disc key recorded in advance on the digital video disc 60.
- the issuance of a physical index 23 issues a physical index recorded in advance on the digital video disk 60 for the purpose of identifying that the disk medium is a playback-only medium. In the first embodiment, it is also used as one of key information for deriving a content key. Physical indexes are recorded only on read-only media, and are recorded in a channel that is different from the normal data area in a manner that is difficult to copy. By recording the physical index on a digital video disc 60, it is possible to determine that the disc is a disc media manufactured through a regular process.
- Revocation list publishing list 25 is illegally created. ⁇ Publishes data to identify the playback device or video content of manufactured video content. Illegal copy monitoring 26 was illegally distributed to the factory. It is a monitoring mechanism that detects manufactured duplicate media based on data collected from video content playback devices.
- the issue of the global serial number 27 issues the global serial number recorded on the mass-produced disk according to the number of mass-produced disks issued by the issuer of mass production number 13.
- Global serial naming is a serial number for all titles, and a unique number is assigned to each disk.
- the global 'serial' number is used as a disk identification number that uniquely identifies each disk in a series of disks.
- Issue Device ID & Device Key 28 It issues a device ID and a device key stored in the non-volatile memory in the disk player 70.
- the device ID is used to specify the playback device when revoking the digital / video / disc playback device 70 by a device pre-recorded on the digital / video / disc 60 / revocation / list.
- the device ID is used to read the device key and the device revocation, restorer, etc. prerecorded on the digital video disk 60, and the method of reading the disk key prerecorded on the digital video disk 60. Used when acquiring.
- Video WM Enbeda 31 is a device for embedding digital watermark information in video content.
- Digital watermarking is a technology that embeds additional information, such as information related to the management of the copy generation of content and information about the copyright holder, in digital content such as still images and moving images.
- the digital watermark is embedded by a method based on, for example, spectrum diffusion. Specifically, the digital watermark used in the present invention is hardly visually perceivable, and the video content does not deteriorate after embedding. In the drawings, the digital watermark is abbreviated as.
- the video WM member 31 calculates the hash value of GUID and embeds the hash value in the video signal as digital watermark information.
- a hash value is used to eliminate a correlation between a value embedded as a video watermark and a value recorded in BCA 62 described later.
- the hash value here is a value obtained by a one-way function such as a hash function (a function that is computationally infeasible to find any two different inputs that have the same output value). .
- the hash value of GU ID is used as a title message necessary for guaranteeing the authenticity of GU ID.
- MPEG 2 encoder 32 is a video compression encoder.
- the MPEG (Moving Picture Experts Group) 2 method is exemplified,
- the compression method adopted is not limited to the MPEG 2 method. Includes the task of configuring files that can be managed in the file system, and the GUID is recorded in the volume / descriptor.
- the video encryptor 41 is a process of encrypting video content with a content key derived from a disc key and a physical index.
- the formatter 42 contains the encrypted video content, the disk key and physical index used to encrypt it, the disk relocation to identify illegally duplicated disks, lists, This is the process of creating a master for mass-producing digital, video and discs 60 from a list of devices and revocations that identify illegally manufactured or modified playback devices.
- the reblinker 51 is a manufacturing process for duplicating a large number of digital video discs 60 from a master disc.
- the content protection system 71 is a control mechanism for copyright protection technology, and is a global 'serial' for device ID, device key, disk relocation list, and played digital video disk 60.
- ⁇ A mechanism for storing numbers, a built-in secure ⁇ A mechanism for calibrating the storage media, and a global playback media under certain conditions ⁇ Serial ⁇ Numbering digital ⁇ Video ⁇ Management with the device ID of the disc playback device 70 20 Provide a mechanism to report to It also has a mechanism to calibrate the built-in secure timer and to report the status of the found film digital watermark when connected to the management mechanism 20. In addition, it has a mechanism to detect an illegal playback state by referring to the device relocation list, disk relocation list, and signature list, and execute playback restriction.
- the issue of a movie film 101 indicates a new movie to be shown in a movie theater.
- the playback device can identify illegally leaked content by providing a means to reproduce this signature data in the playback device. It becomes possible.
- Movie film 102 with WM is a movie film that is distributed to movie theaters by movie companies for screening. Film is generally used, but in the case of digital cinema, it is compressed video data for theater screening. Signature data specified by the copyright protection technology management mechanism is embedded by digital watermark technology.
- the secure timer 103 is a clock whose time information is difficult to falsify.
- the generation of a signature * data 104 is generated as electronic watermark information in a movie film, and the signature * data generation for identifying a movie film is generated based on the time information of the sex timer 103.
- Film WM Enbeda 105 is a device for embedding digital watermark information in movie film. There are two methods: embedding in the film master itself, and embedding when transferring from the master.
- the evening calibration 106 has a mechanism for calibrating the time of a secure timer built in the playback device.
- FIG. 4 shows an example of the configuration of a data recording area in the digital video disk 60.
- the physical index recording area 61 is an area for recording a physical index. Physical indexes are multiplexed and recorded without affecting the original data readout.
- the width of a pit, mark, or the like, which is the main data can be partially changed by a modulation signal, and the changed portion can be multiplexed and recorded on the main data as sub-data.
- pits and marks that are the main data are recorded and recorded.
- the sub-data by these recording methods that is, the data of the multiplex part, is the original data, and the deviation of the width of the main data such as pits and marks, etc., is read by an optical pickup by the playback device.
- the recorded data can be read, and it does not affect the output of the original data binarization circuit.
- Such overnight recording by multiplex recording is used, for example, to eliminate illegal copying by recording identification information of a recording medium.
- BCA Bast.
- a GUID for specifying the title and a global serial number that is different for each disc are recorded.
- the BCA is recorded on the disc media after the data is recorded.
- BCA is a strip that is stripped in the radial direction by irradiating a reflective film made of aluminum or the like formed on the inside of the disc with pulsed laser light modulated according to the recorded information. (Bar code), and can be formed along the innermost circumference of the disc according to the recorded information.
- the playback device can obtain the data recorded in the BCA by reading the BCA thus formed with an optical pickup.
- the data recorded in the BCA is not copied.
- the ID data on the recording medium or the encrypted contents recorded in the data area By recording the key data of the BCA, It is used to prevent the reproduction of contents by unauthorized recording media.
- the device, revocation list, disc, revocation list, and disc key are recorded in a non-rewritable area, such as the lead-in area 63, which is different from the area where video content is recorded. Is recorded.
- the data area 64 is a data area for recording an encrypted video content in which a hash value of GUID is embedded as digital watermark information.
- FIG. 5 shows an example of the configuration of a digital video disc reproducing apparatus 70 for reproducing a digital video disc 60.
- the ROM discriminator 72 performs discrimination for determining whether or not the disc mounted on the digital video disc reproducing device 70 is a read-only digital video disc 60. If read-only digital 'video. If it is determined that the disk is 60, the switch SW1 is turned on. Otherwise, set to off state.
- the decryptor 73- Decrypts the encrypted video content.
- the encryption detector 74 checks whether the digital video disc playback device 70 has been revoked and checks whether the video content recorded on the digital video disc 60 has been encrypted and recorded. Check if it is. If the inspection result indicates that the playback device has not been re-poked and the video content has been encrypted and recorded, the switch SW2 is set to the ON state. Otherwise, set to off state.
- the MPEG2 decoder 75 decompresses the video and converts it into a baseband video signal.
- the video WM detector 76 detects video digital watermark information embedded in video content. After detecting the digital watermark information, The hash value of the GUID recorded in the BCA 62 is calculated, and the hash value is compared with the digital watermark information. If it is confirmed that they do not match, set switch SW 3 to the off state. When both match, or while no digital watermark information is detected, the switch SW3 is set to the ON state.
- the disk revocation checker 77 stores the hash value of the global serial number recorded in the BCA 62 and the disk revocation list stored in the nonvolatile memory in the playback device. This is a process of comparing the registered value and checking whether the same value is registered. If the values match, the digital video disc 60 is determined to be a relocation target and sets the switch SW4 to the off state. As long as no match is found, it is set to the on state. Note that the value to be compared can be combined with other information such as GUID as well as the hash value of the global serial number. As a result, the probability of uniquely identifying a disk can be increased, and the risk of incorrectly recalling a regular disk is reduced.
- the hash function 7 8 is a hash function that calculates the hash value of the serial * pick-up. It is the same as that used when registering the hash value of the global serial pick-up to be re-reported to the disk. It is a function.
- the hash value of the global 'serial' pick-up is used as an identification message necessary to guarantee the authenticity of the global serial pick-up.
- the hash value of the global serial number is used to protect the privacy by making it impossible to identify the title viewed by the user. Is done.
- the non-volatile memory 79 stores the media played by the playback device. This is a non-volatile memory for storing hash values of global, serial, and pick-up.
- the playback media recorded data in the nonvolatile memory 79 is transferred to the device ID 89 and the device serial number pickup device.
- the data is transferred to the management mechanism 20 together with 91, and after the transfer, the data in the nonvolatile memory 79 is erased to secure a free area.
- VPN Virtual Private Network
- SSL Secure Socket Layer
- IP sec IP security protocol
- the version checker 80 is used for storing a digital video disk 60, a disk recorded on the disk 60, a revocation list, and a disc already stored when the list is stored in the non-volatile memory 81. A comparison is made between the version of the unit and the version of the disc, revocation list and list recorded on the digital video disc 60, which is the new version. If the version of the data recorded on the digital video disk 60 is newer, set the switch SW 6 to the ON state and set the disk relocation in the non-volatile memory 81. Update the list data.
- the non-volatile memory 81 is a non-volatile memory for storing the disk relocation list 1.
- the disk / revocation list may be transferred from the management mechanism 20 in a state where a network connection between the management mechanism 20 and the digital video disk playback device 70 is established. At this time, the update of the data in the nonvolatile memory 81 is performed in the same process as the update from the media.
- the secure timer 82 is a timer built into the digital video disk playback device 70 that is difficult to falsify. Based on the output time information, Gunetia list is generated. The time information of the evening image is synchronized with the secure timer 103 in the management mechanism 20 when the network connection between the management mechanism 20 and the digital / video / disk playback device 70 is established. It may be taken and calibrated.
- the signature list generator 83 generates a signature list by generating signature data of a plurality of movie films, for example, 100 titles, retroactively from the time information output by the secure timer 82. .
- the 100 title is, for example, a new movie being shown, and it is a title that has not yet been mass-produced as digital video 'disc 60'. If the playback device plays it, it is considered to be illegally leaked content.
- the film WM detector 84 is a step of detecting a film digital watermark status embedded as digital watermark information in the video content being reproduced.
- the comparator 88 has a film digital watermark status detected by the film WM detector 84 and a signature stored in the signature list generator 83 for identifying illegally leaked content. . This is the process of comparing with the list. While the detection of the film WM detector 84 is not completed, the switch SW5 is set to the ON state. If the detection of the film WM detector 84 has been completed and the status has been registered in the signature list stored in the signature list generator 83, the playback content is determined to be illegally leaked content. No, the content playback operation is interrupted by setting switch SW5 to OFF. Alternatively, a message indicating that illegal content is being reproduced is sent to the user by notifying the user of the reproduction screen.
- Device ID 89 is the identification of digital video disc player 70. This is another data. A unique identification number is distributed for each manufacturer or model of playback device.
- the device 'key 90 is used for combining the device ID 89 and data calculated from the disk's relocation list to create a digital video disk 60 that is concealed by encryption or the like. Derive key.
- the device / serial / numberer 91 is a manufacturing serial number for identifying a device for each of a series of devices distributed by the manufacturer of the digital / video-disc player 70.
- the switch SW1 is a switch for controlling video content reproduction based on the determination result of the ROM discriminator 72.
- the switch SW2 is a switch for controlling video content reproduction based on the determination result of the encryption detector 74.
- the switch SW3 is a switch for controlling video content reproduction based on the determination result of the video WM detector 76.
- the switch SW4 is a switch for controlling the reproduction of the video content based on the determination result of the disc revocation checker 77.
- the switch SW5 is a switch for controlling the reproduction of the video content based on the judgment result of the comparator 88.
- the switch SW 6 is a switch for controlling the storage of the disk revocation list based on the determination result of the version checker 180.
- FIG. 6 shows a flow of the editing and production process of the digital video 'disc 60'. A description will be given based on the processing flow of the editing and production process of the digital video disk 60 shown in FIG. 6 with reference to the block diagrams showing the overall system configuration in FIGS. 1 to 3.
- Content owner 10 wants to make digital ⁇ video ⁇ disc Receiving video content generates an editing production project.
- the editing / production process 30 requests the management mechanism 20 to issue a GU ID (step S11).
- the CA in the figure indicates the management mechanism 20.
- the management mechanism 20 Upon receiving this request, the management mechanism 20 issues a unique GUID for each title (step S12). In step S14, the editing production process 30 receiving the GU ID embeds the GU ID hash value in the video content (step S13).
- the video WM embedder 31 provided based on the license agreement with the management mechanism 20 calculates the hash value of the GU ID, and then uses the hash value as digital watermark information for the video of the video content. Embed in signal (Step S1 4)
- step S10 that is, in steps S11 to S14, the editing and production process 30 and the management mechanism 20 are to configure a VPN using SSL, IPsec technology, etc., and secure network connection It is assumed that data can be transmitted and received by the.
- FIG. 7 shows the flow of the manufacturing process of the digital video disk 60. Based on the processing flow of the digital video disk 60 manufacturing process shown in Fig. 7, refer to the block diagrams showing the overall system configuration in Figs. 1 to 3 and the disk media diagram in Fig. 4. I will explain while.
- HD Receive a DVD disc image from the editing and production process 30 (step S 21). Read the GUID by expanding the polyme descriptor. The GU ID obtained here is transferred from the disk manufacturing factory to the management mechanism 20 (step S22).
- the content owner 10 hands over the video content for editing and production to the editing and production process 30, and also orders mass production of discs to the disc manufacturing factory, at which time the number of orders is also specified (step S23). ).
- the disk manufacturing factory that received the order for mass production of the disk from the content owner 10 transfers the GU ID and the number of ordered disks to the management mechanism 20 and issues a global serial number to write it to each disk to be manufactured. Request (step S24).
- the management mechanism 20 specifies the title of the video content from the GUID received from the disc manufacturing factory. Unused global serial numbers are strictly calculated for the number of orders so that the disc media manufactured from the received order quantity can record a unique serial number for each title across all titles (step S twenty five) .
- the management mechanism 20 gives the disk manufacturing plant a license to manufacture the disk, ie the disk key required to encrypt the HD-D VD disk image, the global 'serial' numbered device, and the device ' Transfer the option list and the disc revocation list (step S26).
- Device Reposition List now restricts playback of legitimate disc media on illegally manufactured disc players. This is the data for The disc 'revocation' list is data for restricting the reproduction of illegally manufactured disc media in a legitimate disc player.
- the disc manufacturing factory combines the HD-D VD disc image received from the editing and production process 30 with the data received from the management organization 20 and provides it under a license agreement with the management organization 20.
- the HD-DVD disc image is encrypted to create a disc and master (master) (step S27).
- step S20 that is, in steps S24 to S27, the disk manufacturing factory and the management mechanism 20 shall configure a VPN using SSL, IPsec technology, etc., and secure data via a secure network connection. It is assumed that transmission / reception of data is possible.
- Disk Mass production of disk media from the master (master) (step S28). Burn BCA into the manufactured disc media.
- FIGS. 8 and 9 show the flow of processing in the digital video / disc 60 reproducing apparatus.
- the processing flow is divided into Fig. 8 and Fig. 9 due to restrictions on the drawing space.
- the playback device reads the physical index recording area 61 from the loaded disk medium (step S30).
- Physical '' The method of reading the index recording area 61 is provided by the manufacturer of the reproducing apparatus and the components used in the reproducing apparatus, by making a formal contract with the management mechanism 20.
- step S31 it is determined whether or not the physical index is correctly detected. If the playback device does not correctly detect the physical index, the playback operation is stopped and the user is notified through the user interface. Here, it is assumed that the playback device plays only the read-only disc media. However, if the recordable disc media having no physical index can be played, the process shifts to a process for playing the recordable disc media. It is also assumed.
- the BCA data is read to obtain the GUID and the global'serial number (step S32).
- the hash value of the global serial number is calculated, and the reproduction disk media list stored in the non-volatile memory 9 is searched (step S33).
- step S35 If a hash value exists in the list, the process proceeds to step S35. If the hash value does not exist in the playback disk / media list, the hash value is stored in the non-volatile memory 79 (step S34). This list is transferred from the digital video disk playback device 70 to the management device 20 when the digital video disk playback device 70 and the management mechanism 20 are securely connected to the network, and is stored in the memory. The list recorded in the non-volatile memory 79 after the transfer is deleted according to the availability.
- step. S36 If the hash value does not exist in the disk / revocation list, read out the device / relocation list in the lead-in area, the disk / relocation list, and the disk key concealed by encryption (step). S36). These pieces of information are needed to decrypt the encrypted video content recorded on the disc.
- the technology for decrypting the encrypted video content is provided by the manufacturer of the playback device and the components used in the playback device by making a formal contract with the management mechanism 20.
- Device ⁇ Revocation ⁇ List and disk ⁇ Revocation ⁇ The list was read correctly, or the playback device is the device ⁇ Revocation * Disk not encrypted by the list but concealed by encryption etc. * The key is read correctly It is determined whether or not it has been issued (step S37).
- Device / Relocation list / Disk / Revocation list could not be read correctly, or the playback device is a device / Relocation / List that is to be re-reported and was concealed by encryption etc. If it is determined that the video content has not been properly encrypted and recorded, such as when it could not be read, stop the playback operation and notify the user via the user interface that the playback has been stopped.
- disk ⁇ Revocation list can be read correctly, and disks and keys that are concealed by encryption etc. can be read correctly, and the playback device is subject to device and relocation. If not, the disk-relocation list is updated (step S38).
- This resource The list contains version information. When a newer disk relocation list than the past disk revocation list stored in the non-volatile memory 81 is acquired, the list in the non-volatile memory 81 is updated. I do.
- a FIF ⁇ (First-InFirs t-Out) structure in which multiple versions of the disk 'Relocation' list is stored in the memory and erased in order from the oldest version It is possible. The data area is read, and playback of the decrypted encrypted video content is started (step S39).
- step S40 After the reproduction is started, it waits until a certain time elapses until a video watermark embedded in the video signal is detected (step S40). If after a certain period of time, or after processing a certain amount of streams and no video watermark has been detected, the playing disc media is considered to be video content created by an unauthorized editing process. The playback operation is stopped and the user is notified through the user interface.
- This video watermark detection technique is provided by the manufacturer of the playback device and the components used in the playback device, by making a formal contract with the management organization 20.
- step S41 If a video digital watermark is detected within a certain time or within a certain processing amount, it is checked whether the digital watermark information shows the same value as the GUID hash value (step S41). . If they do not match, the playback disc media is determined to be video content created by an illegal editing process or disc media manufactured by an unauthorized manufacturing process, and the playback operation is stopped. Inform the user of the stoppage through the design evening festival. If they match, the reproducing operation is continued (step S42).
- a signature is generated in the signature list generator 83.
- Generate a gnetti list (step S43).
- Signature's list states that when content owners 10 release a new movie at a theater, they will sell disc media manufactured by piracy before the new movie is sold as disc media. It is designed to prevent the opportunity to earn box office revenue for new movies and the opportunity to earn revenue from sales of regular disc media.
- Signature data is used to identify movies that are or are going to be performed. Is a database with multiple records. The method of generating the signature list is provided by a manufacturer of the reproducing apparatus and a component used in the reproducing apparatus, by making a formal contract with the management organization 20.
- the detection of the film digital watermark by the film WM detector 84 is executed. If a film watermark is detected, the signature stored in the signature list generator 83 with that status. Search the list to see if the matching Signature is registered (step S44) .If it is, the playback media will incorrectly copy the movie that was shown at the theater. It is determined that the video content is edited, produced and manufactured using this as a source, and the playback operation is stopped and the user is notified through the user interface that the playback has been stopped. If there is no registration, it is confirmed that the disc is a media that has been edited and produced under a formal contract. It is manufactured as a medium, and normal playback operation is guaranteed.
- This film digital watermark detection technology is provided by the manufacturer of the playback device and the components used in the playback device by making a formal contract with the management organization 20.
- the GUID and the hash value of the GUID are recorded on the digital video disk 60 by two different recording methods.
- the GUID is recorded on the BCA of the disk media.
- GUID hash value performs digital video disc It is embedded in the video content as digital watermark information.
- the digital video disc reproducing device 70 reads the GUID from the BCA, compares the hash value of the read GUID with the digital watermark information embedded in the video content, and performs a reproducing operation when they match.
- the digital video disk playback device 70 can confirm that the digital video disk 60 manufactured in 50) has been recorded.
- the video signal obtained by the illegally edited video is edited in an unauthorized editing and production process, and the disk media manufactured and distributed at the disk manufacturing factory can be identified by the digital video disk reproducing device 70. It is possible to place a playback restriction on
- CCI Copy Control Information
- the GUID information embedded as the digital watermark information is correctly detected and compared with the GUID information separately recorded in the BCA of the disk medium, and a match is confirmed. Since the reproduction is permitted with such a situation, an attack to make the digital watermark information undetectable has no meaning. Therefore, it is not necessary to deal with an attack on the digital watermark technology, and the applied digital watermark technology is simplified. This contributes to the cost reduction of a playback device to which the new technology is applied.
- the physical index issued from the management mechanism 20 is digital video. Recorded on disc 60. This physical index The data is multiplex-recorded on the read-only disk medium without affecting the original data reading.
- the digital video disc reproducing device 70 is configured to perform a reproducing operation when a physical index is detected from the reproduced disc. As a result, the digital / video / disc reproducing apparatus 70 can confirm whether or not the disc is a read-only disc / media manufactured at a disc manufacturing factory that has been approved by the management mechanism 20.
- the video content recorded on the digital video disk 60 is encrypted.
- the digital video disk reproducing device 70 can determine whether the illegally obtained video signal is a disk medium manufactured and distributed at an unauthorized disk manufacturing factory by the ROM discriminator 72. Confirmation of whether the disc is a read-only disc media by detecting a physical index, and confirmation of whether the video content of the digital video disc 60 is encrypted by the encryption detector 74 It can be identified by the following two means, and it is possible to restrict the reproduction.
- the global serial number will always be duplicated. This duplication can be detected by monitoring with a management server or the like of the management mechanism 20 connected to the digital video disk playback device 70 via a network. Therefore, it is possible to manage so that a disk manufacturing factory that has been approved by the management mechanism 20 does not manufacture disks that exceed the number of disks ordered. Furthermore, even if the hash value of Global / Serial No. is sent to the network, the title cannot be specified from the hash value, and the privacy of the user can be protected.
- signature data is embedded in a film content to be shown in a movie theater or the like by a digital watermark in a film WM application 105.
- the digital video disc reproducing device 70 When playing back a disc, the digital video disc reproducing device 70 generates a signature list based on the time information in the signature list generator 83, and converts it into film content in the film WM detector 84. Read the embedded electronic watermark information. Then, the comparator 88 compares the signature list with the signature data, and if both match, the reproduction is stopped. Thus, the digital / video / disc playback device 70 checks whether or not the reproduced disc media is a pirated disc / media produced from a video signal illegally leaked from a movie theater where a new movie is being played.
- Figure 10 shows an example of the relationship between the duration of a movie as film content, the release time of a legitimate digital / video / disc, and the limited playback time of illegally copied DVDs.
- new movies are released in theaters in the order of evening titles A, B, C,..., and then, as shown on the scheduled DVD release date, titles A, B, C, In the following order, it is assumed that regular digital video discs will be released.
- the “reproduction date” shown in FIG. 10 indicates the date on which the digital video disk reproducing device 70 according to the first embodiment of the present invention reproduced a DVD. For example, suppose that the reproduction of illegally duplicated DVDs is restricted until the official digital video disc is released. As shown in FIG. It is assumed that the overnight generation range is, for example, 200 days from the reproduction date. In this case, at the time of the first playback, the titles A and B including the scheduled release date of the regular DVD within 200 days from the playback date are set as the playback-limited titles, and the title is set in the digital video disc playback device 70. Signature data specifying A and B is generated. Similarly, on the second playback date, evening titles A, B, and C are set as playback restriction titles, and a signature file for identifying titles A, B, and C in the digital video disc playback device 70 is set. One night is generated.
- titles B and C are set as playback-limited titles because the official DVD of title A has already been released, and titles B and C are set in digital video disc playback device 70.
- Signature data is generated that identifies the Similarly, on the fourth playback date, the title C is set as a playback restriction title, and signature data for specifying the title C is generated in the digital video disk playback device 70. The fifth and subsequent-. Similarly, a playback-restricted title is determined, and a signature for specifying a title for which playback is to be restricted is generated.
- ⁇ Data is generated in the digital / video / disk playback device 70.
- the signature list based on the plurality of signature data generated in this way is compared with the signature data embedded by the digital watermark of the reproduced DVD, and if they match, the digital video disc reproducing apparatus is used. 70 limits disc playback.
- the disk-specific number is assumed to be a global serial number that is assigned by a serial number. However, a disk-specific number can be assigned at random. In the second embodiment of the present invention, disc-specific numbers are randomly assigned in the first embodiment.
- FIGS. 11 to 13 show an example of the entire system configuration including a production process, a production process, and a playback device for a digital 'video' disc.
- the entire system is divided into Fig. 11 to Fig. 13 due to the restriction of drawing space.
- the content owner 10 owns the copyright of the video content and intends to order mass production of the digital video disc for the purpose of selling it as a digital video disc for profit. People or organizations.
- the management mechanism 20 is a management mechanism for copyright protection technology. Upon receiving a request from the content owner 10, it goes to the editing and production process, the manufacturing process, and the playback device of digital video discs under a formal contractual relationship. Providing technology and information to operate copyright protection technology, properly managing parentheses, and digitally. video. An organization with a function to eliminate unauthorized copying of disks
- the editing and production process 30 is the editing and production process for video content requested by the content owner 10 and is set up in digital video disc editing studios.
- the master ring process 40 is a process for making a master for mass duplication of digital video discs, and is set up in a disc manufacturing factory.
- the disk mass production process 50 is a mass production process of digital video disks, and is installed in a disk manufacturing factory or the like.
- Digital Video Disk 60 is a mass-produced, read-only digital video disk medium in which video and audio signals are mainly recorded.
- the digital video disc player 70 is a digital video disc 60 player.
- GUID 21 issues a GUID (Global ID) distributed by title.
- GUID is used as title information indicating the title of the video content, and is provided, for example, via a network from a copyright management server approved by the management mechanism 20.
- Issuing a disc key 22 is one of the key information for deriving a content key, and is digital. Issue a disk key pre-recorded on the video disk 60.
- the issuance of a physical index 23 issues a physical index recorded in advance on a digital 'video' disk 60 in order to identify that the disk media is a playback-only medium. In the second embodiment, it is also used as one of key information for deriving a content key. Physical indexes are recorded only on read-only media, and are recorded in a channel that is different from the normal data area in a hard-to-reproduce manner. By recording the physical index on a digital video disk 60, the disk media manufactured through the regular process Key can be determined.
- Monitoring of illegal copying 26 was illegally distributed in the market. It is a monitoring mechanism that detects manufactured duplicate media based on data collected from video content playback devices.
- the device ID & device key issuance 28 issues a device ID and a device key stored in a non-volatile memory in the digital video disk player 70.
- the device ID is used to identify the playback device when revoking the digital video playback device 70 by means of a device pre-recorded on the digital video disc 60 and a relocation list.
- the device ID is the device key and the device recorded in advance on the digital video disk 60. ⁇ The method of reading the disk key recorded in advance on the digital * video disk 60 is obtained from the revocation list. Used when
- Video WM Enbeda 31 is a device for embedding digital watermark information in video content.
- the video WM member 31 calculates the hash value of GUID and embeds the hash value as digital watermark information in the video signal.
- a hash value is used to eliminate a correlation between a value embedded as a video digital watermark and a value recorded in BCA 62 described later.
- the hash value of GU ID is used as a title message necessary to guarantee the authenticity of GU ID. Since the digital watermark and the hash value have been described in the first embodiment, the description is omitted here.
- MPEG 2 encoder 32 is a video compression encoder.
- the MPEG 2 system is exemplified, but the compression system employed is not limited to the MPEG 2 system.
- Configuring files that can be managed in the file system And the GUID is recorded in the poly-descript.
- the video encryptor 41 is a process of encrypting video content using a disc key and a content key derived from a physical index.
- the formatter 42 contains the encrypted video content, the disk key and physical index used to encrypt it, the disk revocation list to identify the illegally duplicated disk, and the illegal This is the process of creating a master for mass-producing digital, video and discs 60 from a device, relocation, and list to identify a newly manufactured or modified playback device.
- Rebrique Ito 51 is a manufacturing process that produces large volumes of digital video discs 60 from masters.
- Content protection system 71 is a control mechanism of copyright protection technology, device ID device 'key, disk. Revocation> List and reproduced digital video, mechanism to memorize the disc number of disc 60, mechanism to calibrate the built-in secure timer, and disc of playback media under certain conditions It has a mechanism to report the unique number to the management system 20 together with the device ID of the video and disk playback device 70. In addition, when connected to the management mechanism 20, it has a mechanism to calibrate the built-in secure password and report the status of the found film digital watermark. In addition, the system has a mechanism to detect an illegal playback state by referring to the device / relocation list, the disk / relocation list, and the signature list, and execute a playback restriction.
- the issue of a movie film 101 indicates a new movie to be shown in a movie theater.
- a movie that was screened in a cinema was shot with a digital video camera, or a video signal obtained by telecine conversion was converted to a digital video
- a video signal obtained by telecine conversion was converted to a digital video
- embed signature data into the film content to be protected using digital watermarking technology, etc. and provide a means to reproduce this signature data in the playback device. By doing so, it becomes possible for the playback device to specify the illegally leaked content.
- Movie film 102 with WM is a movie film that is distributed to movie theaters by movie companies for screening. Film is generally used, but in the case of digital cinema, it is compressed video data for theater screening.
- the signature date specified by the copyright protection technology management mechanism is embedded by digital watermarking technology.
- the secure timer 103 is a clock whose time information is difficult to falsify.
- the generation of signature data 104 is a device that embeds digital watermark information into movie film as digital watermark information and generates signature data for identifying the movie film based on the time information of the timer 103. is there.
- Film WM Enbeda 105 is a device for embedding digital watermark information in movie film. There is a method of embedding it into the film itself and a method of embedding it when transferring from the film.
- Timer calibration 106 is secure built into the playback device. There is a mechanism to calibrate the time of the evening.
- the issue of discs ⁇ unique ⁇ numbering 27 issues the number of discs to be mass-produced according to the number of discs issued by the issuer of mass production 13, and the disc ⁇ unique ⁇ number.
- the disc unique number is composed of a random number unique to each disc obtained by scrambling the serial number and the like throughout all titles and its verification value.
- the verification value is calculated by MDC (Message Digest Code) or MAC (Message Authentication Code) using GU ID as a key.
- the disk unique number is used as a disk identification number for uniquely identifying each disk in a series of disks.
- FIG. 14 shows an example of the configuration of a data recording area in the digital video disk 60.
- the physical index recording area 61 is an area for recording a physical index.
- Physical indexes are multiplexed and recorded without affecting the original data reading. With this recording method, even if the original data is read out over the entire area of the disk and copied, the physical index of the multiplex part is not copied, so that it is effective for whole copy (bit-by-pit copy). It is said.
- burst cutting area BCA 62 a GUID for specifying a title and a disc number that is different for each disc are recorded.
- BCA is recorded on disk media after being recorded overnight.
- the specific recording method of the physical index and the BCA has been described in the first embodiment, and a description thereof will be omitted.
- the device, relocation list, disc, relocation list, and disc key are recorded in a non-rewritable area, for example, in the lead-in area 63. You.
- the data area 64 is a data area for recording an encrypted video content in which the hash value of GUID is embedded as digital watermark information.
- FIG. 15 shows an example of the configuration of a digital video disk playback device 70 for playing back a digital video disk 60.
- the ROM discriminator 72 performs discrimination for determining whether the disc mounted on the digital video disc reproducing apparatus 70 is a read-only digital video disc 60 or not. If read-only digital video If it is determined that the switch is 60, the switch SW1 is set to the ON state. Otherwise, set to off state.
- Decrib 73 decrypts the encrypted video content.
- the encryption detector 74 checks whether the digital video disk playback device 70 has been re-poked and the video content recorded on the digital video disk 60 is encrypted and recorded. Check if it is. If the playback device has not been re-poked and the video content has been encrypted and recorded, switch SW2 is set to the ON state. Otherwise, set to off state.
- the MPEG2 decoders 75 and 92 decompress the video and convert it to a baseband video signal.
- the video WM detector 76 detects video digital watermark information embedded in video content. After detecting the digital watermark information, a hash value of GUID recorded in BCA 62 is calculated, and this hash value is compared with the digital watermark information. If it is confirmed that they do not match, the switch SW3 is turned off. When both match, or while no digital watermark information is detected, the switch SW3 is set to the ON state.
- Disc Revocation checker 77 is a disc recorded in BCA 62.Unique pick-up and disc stored in non-volatile memory in the playback device.Relocation list is registered in the list. This is a process of comparing the registered values and checking whether the same values are registered. If the values match, the digital video disc 60 is determined to be revoked, and the switch SW4 is set to the off state. As long as no value match is found, it is set to the on state.
- the non-volatile memory 79 is a non-volatile memory for storing a disk unique number as a record of a medium reproduced by the reproducing apparatus.
- the playback media recording data in the nonvolatile memory 79 is stored in the device ID 89, the device The data is transferred to the management mechanism 20 together with the serial pick-up 91, and after the transfer, the data in the nonvolatile memory 79 is erased to secure a free area.
- encrypted communication such as SSL authentication and VPN based on IPsec encryption will be performed.
- the version checker 80 can store the disk revocation list recorded on the digital video disk 60 in the non-volatile memory 81 when the disk revocation list is already stored. Version and the version of the digital video recorded on disk 60. Compare the version in the list and which is the new version. If digital. If the data version recorded on the video disk 60 is newer, set the switch SW 6 to the ON state and set the switch in the non-volatile memory 81 to the disk ⁇ Relocation list data To update.
- the non-volatile memory 81 is a disk. Revocation ⁇ Non-volatile memory for storing lists. Disc ⁇ The revocation list may be transferred from the management mechanism 20 while the network connection between the management mechanism 20 and the digital video disk playback device 70 is established. At this time, the data in the non-volatile memory 81 is updated in the same process as the update from the media.
- the secure timer 82 is a timer built in the digital video disk playback device 70 that is difficult to falsify. Signature data is generated based on the output time information.
- the time information of the evening image is stored in a network connection between the management mechanism 20 and the digital / video / disc player 70. In this state, the secure timer 103 in the management mechanism 20 may be synchronized and calibrated.
- the signature list generator 83 generates a signature list by generating signature data of a plurality of movie films, for example, for 100 titles, retroactively from the time information output by the secure timer 82.
- This 100 title is, for example, a new movie being shown and is not yet mass-produced and sold as a digital video disc 60. If the playback device plays it, it is considered to be illegally leaked content.
- the film WM detector 84 is a step of detecting a film digital watermark status embedded as digital watermark information in the video content being reproduced.
- the comparator 8 8 is a film electronic watermark status detected by the film WM detector 8 4 and a signature list stored in the signature list generator 8 3 for identifying the illegally leaked content. This is a step of comparing and. While the detection of the film WM detector 84 is not completed, the switch SW5 is set to the ON state. If the detection of the film WM detector 84 has been completed and the status has been registered in the signature list stored in the signature list generator 83, the playback content is regarded as illegally leaked content. By setting switch SW 5 to the OFF state, the content playback operation is interrupted. Alternatively, a message indicating that illegal content is being reproduced is sent to the user by notifying the user of the reproduction screen.
- the device ID 89 is identification data of the digital / video / disc reproducing device 70. A unique identification number is distributed for each manufacturer or model of playback device.
- the device key 90 is a disk concealed by encryption recorded on the digital video disk 60 by combining the device ID 89 with the disk calculated from the revocation list. ⁇ Deriving keys.
- the device / serial / numberer 91 is a production serial number for identifying a device for each series of devices distributed by the manufacturer of the digital / video / disc reproducing device 70.
- the switch SW1 is a switch for controlling video content reproduction based on the determination result of the ROM discriminator 72.
- the switch SW2 is a switch for controlling video content reproduction based on the determination result of the encryption detector 74.
- the switch SW3 is a switch for controlling the reproduction of the video content based on the determination result of the video WM detector 76.
- the switch SW 4 is a switch for controlling the reproduction of video content based on the judgment result of the disc relocation checker 77.
- the switch SW5 is a switch for controlling video content reproduction based on the determination result of the comparator 88.
- Switch SW6 is a version. This is a switch for controlling the storage of the disk / relocation / list based on the judgment result of the checker 180.
- Fig. 16 shows the flow of the editing and production process of digital video disc 60. A description will be given based on the processing flow of the editing and production process of the digital video disk 60 shown in FIG. 16 with reference to the block diagrams showing the overall system configuration shown in FIGS. 11 to 13. .
- the Content owner 10 Receives video content that the user wants to convert to digital, video and discs. Editing projects for digital, video and disc production Then, the editing and production process 30 requests the management mechanism 20 to issue a GU ID (step S211).
- the CA in the figure indicates the management mechanism 20.
- the management mechanism 20 Upon receiving this request, the management mechanism 20 issues a unique GUID for each title (step S212).
- the editing production process 30 receiving the GU ID embeds the GU ID hash value in the video content in step S214 (step S2 13).
- the video WM member 31 provided based on the license agreement with the management mechanism 20 calculates the hash value of the GU ID, and then uses the hash value as digital watermark information for the video of the video content. Embed in the signal (step S214).
- step S210 that is, in steps S211 to S214, the editing and production process 30 and the management mechanism 20 are configured to form a VPN using SSIP sec technology or the like. It is assumed that data can be transmitted and received by network connection.
- Each file / data is multiplexed, and the GUID is recorded in the volume / descriptor which is file system management information (step S216).
- Fig. 17 shows the flow of the manufacturing process of the digital video disc 60. You. Based on the processing flow of the manufacturing process of the digital video disk 60 shown in FIG. 17, a block diagram showing the overall system configuration shown in FIGS. 11 to 13 and the disk shown in FIG. This will be described with reference to a media relation diagram.
- HD Receive a DVD disc image from the editing and production process 30 (step S2 21). Read the GU ID by expanding the volume descriptor. The GU ID obtained here is transferred from the disk manufacturing factory to the management mechanism 20 (step S222).
- the content owner 10 hands over the video content for editing and production to the editing and production process 30 and orders mass production of the discs to the disc manufacturing factory, at which time the order quantity is also specified (step S2). twenty three) .
- the disc manufacturing factory that has received the order for mass production of the discs from the content owner 10 transfers the GU ID and the number of ordered discs to the management mechanism 20 and requests the issuance of disc unique numbers to be written on each disc to be manufactured (step S2 24).
- the management mechanism 20 specifies the title of the video content from the GUID received from the disc manufacturing factory.
- the disc media manufactured from the received order quantity is calculated strictly for unused discs, unique pick-ups consisting of a unique random number and its verification value for each title for all titles. Yes (Step S225).
- the verification value shall be calculated by a method such as, for example, MD C or MA C using GU ID as a key.
- the management mechanism 20 gives the disc factory a license to manufacture discs, that is, HD—the disc key, disc, unique number, device, and revocation required to encrypt the DVD disc image.
- -List, Disc & Revocation 'Transfer List (Step S226).
- the device / relocation list is data for restricting the playback of regular disk media in an illegally manufactured disk player.
- the disc repo list is data for restricting the reproduction of illegally manufactured disc media on a legitimate disc player.
- the disc manufacturing factory combines the HD-D VD disc and image received from the editing and production process 30 with the data received from the management mechanism 20 and provides it based on a license agreement with the management mechanism 20
- the HD-DVD disc image is encrypted using the selected encryption technology to create a disc master (master) (step S227).
- step S220 that is, in steps S224 to S227, the disk manufacturing factory and the management mechanism 20 shall configure a VPN using SSL, IPsec technology, etc. It is assumed that data transmission and reception can be performed over a network connection.
- Step S228 Mass production of disk media from the disk master (master) (Step S228) Burn BCA to the manufactured disk media.
- a disk unique pick-up having a value different from the GU ID for identifying the title and each one is recorded (step S 2 29).
- FIG. 18 and FIG. 19 show the processing flow in the playback device of the digital video 'disk 60.
- the processing flow is divided into Fig. 18 and Fig. 19 due to restrictions on the drawing space.
- the playback device reads the physical-index recording area 61 from the loaded disk medium (step S230).
- the reading method of the fuji-index storage area 61 is provided by the manufacturer of the reproducing apparatus and the parts used for the reproducing apparatus by making a formal contract with the management organization 20.
- step S231 it is determined whether or not a physical index is correctly detected. If the playback device cannot correctly detect the physical-index, the playback device determines that the content is a disk media other than the playback-only disk media whose content has been encrypted by the encryption method described in the second embodiment, and will be described later. Processing shifts to film WM check. Here, if the playback device plays only the read-only disc medium, it is assumed that the playback operation is stopped and the user is notified via the user interface that the playback operation has been stopped.
- the playback device If the playback device detects physical and index correctly, it reads the BCA data and obtains the GUID and disk unique number
- Step S2 32 the validity of the obtained disk “unique pick-up is confirmed by the verification value (step S233). If the validity is not confirmed, the disc media is determined to be an illegally manufactured disc media, and the playback operation is stopped and the user is notified through the user interface that the operation has been stopped. If the validity is confirmed, the process proceeds to step S2334.
- Step S2 3 4 Search the playback disk / media list stored in the non-volatile memory 79 to check whether the read-only disk media having the same value as the disc / unique / number has been played in the past.
- Step S if the same value exists in the playback disk, media, and list Proceed to 2 3 6. If the same value does not exist in the playback disk / media list, the value is stored in the non-volatile memory 79 (step S235). This list is transferred from the digital video disc playback device 70 to the management device 20 when the digital video disk playback device 70 and the management mechanism 20 are securely connected to the network, and the memory The list recorded in the non-volatile memory 79 after the transfer is deleted according to the availability.
- the disc / revocation list stored in the non-volatile memory 81 is searched by the value of the disc / unique / number (step S2336). If the same value exists in the disc's revocation list, the playback disc media is determined to be revoked, and the playback operation is stopped and the user is notified through the user interface that the playback operation has been stopped. If the same value does not exist in the disk / revocation list, read the device in the lead-in area, the relocation list and the disk, and read the list and the disk / key that has been concealed by encryption. (Step S237). Such information is needed to decode the encrypted video content recorded on the disc.
- the technology for decrypting the encrypted video content is provided by the manufacturer of the playback device and the components used in the playback device by making a formal contract with the management mechanism 20. It is determined whether the device key, the revocation list, the disk, the revocation list, and the disk key concealed by encryption or the like have been correctly read (step S2388). It is determined that video content is not properly encrypted and recorded, such as when a device, relocation list, disk, relocation location, or a disk key concealed by encryption or the like could not be read correctly. In this case, the content is encrypted by the encryption method described in the second embodiment.
- the disc is determined to be a disc medium other than the read-only disc medium, and the processing shifts to the film WM check described later.
- the reproduction operation is stopped at this point and the user is notified of the stop through the user interface.
- Step S 239 This list contains version information. If the version of the past disk / revocation list stored in the non-volatile memory 8 1 is also a new disk / revocation list, the list in the non-volatile memory 8 1 is updated. I do. It is possible to have a FIFO structure in which multiple versions of a disc »revocation * list are stored in the memory and erased in order from the oldest version. The data area is read out, and the reproduction of the decrypted encrypted video content is started (step S240).
- the system waits until a video watermark embedded in the video signal is detected until a certain time elapses (step S2241). If after a certain period of time, or after processing a certain amount of streams, no video watermarks have been detected, the playback disc media will contain video content created by an unauthorized editing process. Is determined, the reproduction operation is stopped, and the user is informed of the stop through the user interface.
- This video watermark detection technique is provided by the manufacturer of the playback device and the components used in the playback device, by making a formal contract with the management organization 20.
- Video watermarking within a certain period of time or within a certain amount of processing If is detected, it is checked whether the digital watermark information indicates the same value as the GUID hash value (step S2422). If they do not match, it is determined that the playback disc media is video content created by an unauthorized editing process or disc media manufactured by an unauthorized manufacturing process, and the playback operation is stopped and the user Inform the user of the suspension via the interface. If they match, the playback operation is continued.
- the film WM is detected during playback to determine whether or not the content is illegal. I do.
- FIG. 20 shows the processing flow at that time.
- Signature list is that when content owners 10 release a new movie in a theater, they will sell disc media manufactured by piracy before the new movie is sold as disc media. The purpose of this program is to prevent the loss of the opportunity to earn the box office of a new movie and the opportunity to earn the sales of regular disc media. Signature This is a data base where multiple data are recorded. This signature list generation method is provided by the manufacturer of the playback device and the parts used for the playback device by making a formal contract with the management organization 20. You.
- the detection of the film digital watermark by the film WM detector 84 is executed. If a film digital watermark is detected, the signature list stored in the signature list generator 83 is searched according to the status, and it is confirmed whether or not the matching signature data is registered (step S24). Four ) . If it is confirmed that the content is registered, the playback disc media illegally obtains the work shown at the theater, determines that it is edited, produced, and manufactured using this as the source, and performs the playback operation. And inform the user of the stoppage through the user interface. If there is no registration, it is confirmed that the disk is a disk / media that has been edited / produced / manufactured under a regular contract, and normal playback operation is guaranteed.
- This film digital watermark detection technology is provided by the manufacturer of the playback device and the components used in the playback device by making a formal contract with the management organization 20.
- the GUID and the hash value of the GUID are recorded on the digital video disk 60 by two different recording methods.
- the GUID is recorded on the BCA of the disk media.
- the GUID hash value is embedded as digital watermark information in the video content that performs digital, video, and disk conversion.
- the digital video disk playback device 70 reads the GUID from the BCA, compares the hash value of the read GUID with the digital watermark information embedded in the video content, and performs a playback operation when they match.
- the content that was video-edited in the editing and production process 30 with the approval of the management organization 20 was converted to the disc manufacturing process (mass and ring ring process 40, mass production of disks with the same approval of the management organization 20).
- the digital video disc 60 produced in step 50) is recorded on the digital video disc 60
- the raw device 70 can be confirmed.
- the video signal obtained by the illegally edited video is edited in an unauthorized editing and production process, and the disk media manufactured and distributed at the disk manufacturing factory can be identified by the digital video disk reproducing device 70. It is possible to place a playback restriction on
- the GUID information embedded as the digital watermark information is correctly detected and compared with the GUID information separately recorded in the BCA of the disk media, and a match is confirmed. Since the reproduction is permitted after the attack, the attack to make the digital watermark information undetectable has no meaning at all. Therefore, there is no need to deal with attacks on the digital watermark technology, and the applied digital watermark technology is simplified. This contributes to reducing the cost of the playback device to which the new technology is applied.
- the physical index issued from the management mechanism 20 is recorded on the digital video disk 60 in the master ring process 40. This physical index is multiplex-recorded on a read-only disc medium without affecting the original data reading.
- Digital> Video * Disc playback device 70 is configured to perform a playback operation when a physical index is detected from the played disc. As a result, the digital / video / disc reproducing apparatus 70 can confirm whether or not the disc is a read-only disc / media manufactured in a disc manufacturing factory that has been approved by the management mechanism 20.
- the video content recorded on the digital video disk 60 is encrypted.
- the digital video disc reproducing apparatus 70 can determine whether the illegally obtained video signal is a disc media manufactured and distributed at an unauthorized disc manufacturing factory by using a ROM discriminator 7. Confirmation of whether the disc is a read-only disc by detecting the physical index in step 2, and the video content of the digital video disc 60 by the encryption detector 74 is encrypted and recorded. It can be identified by two means, that is, confirmation of whether or not it is possible, and it is possible to restrict the reproduction.
- the second embodiment of the present invention if an attempt is made to manufacture more disks than the specified number, random unique numbers in the disc / unique / nampa will always be duplicated.
- This duplication can be detected by monitoring with a management server or the like of the management mechanism 20 connected to the digital / video / disk playback device 70 via a network. Therefore, in a disk manufacturing factory that has been approved by the management mechanism 20, it is possible to manage the disk production so that the number of disks that have been ordered is not exceeded. Furthermore, by using the disk's unique number for each disk, even if this data is sent to the network, the title cannot be specified from the disk, unique, or naming device, and the privacy of the user is increased. It becomes possible to protect.
- signature data is embedded in a film content to be screened in a movie theater or the like by a digital watermark in the film WM enbeder 105.
- the digital video disc reproducing device 70 generates a signature list based on time information in a signature list generator 83 when reproducing a disc, and a film WM detector 84 generates a film list. Read the electronic watermark information embedded in the content. Then, in the comparator 88, the signature list is compared with the signature list, and if both match, the reproduction is stopped.
- the digital / video / disc reproducing apparatus 70 can confirm whether or not the disc is a key, and it is possible to add a reproduction restriction thereto.
- a specific example of the reproduction restriction using the list and the signature date is the same as that described with reference to FIG. 10 in the above-described first embodiment, and the description thereof will not be repeated. .
- the present invention is not limited to the embodiments of the present invention described above, and various modifications and applications are possible without departing from the gist of the present invention.
- the GUID is allocated for each title. However, the present invention is not limited to this. If the title can be specified, another allocation method such as a digital video / disc manufacturing request may be used. It may be.
- the GUID is recorded in the BCA, and the hash value of the GUID is recorded as the digital watermark information of the video content.
- the authenticity of the digital watermark information value and the BCA value is
- other combinations may be used, such as recording the GUID as digital watermark information of the video content and recording the hash value of the GUID in the BCA.
- the physical index in the first and second embodiments described above is shown to be multiplex-recorded on a part of the data area, but the present invention is not limited to this.
- multiple recording may be performed in a lead-in area or the like.
- the video content in which the digital watermark is embedded is recorded, and then the GUID and the like are recorded in the BCA.
- the recording order is not limited to this.
- the above-described relocation list, disk, and key according to the first and second embodiments are recorded in the lead-in area before the manufacturing process by the replica, but the present invention is not limited to this. When the amount is large May be encrypted and recorded in the data area.
- the playback device has a secure timer.
- the playback device does not have a secure timer and refers to time information of an external secure timer such as a copyright management server. You may do it.
- the determination is made by the global serial pickup or the disk unique pickup, and then the determination is made by the signature list. It is not limited to this.
- an optical disc is described as a recording medium for video content.
- the present invention is not limited to this, and other media such as a magnetic disc, a magneto-optical disc, an optical card, and a memory card may be used. It can also be applied to a read-only recording medium.
- information that can be determined as to whether the medium is a legitimate recording medium is recorded on the recording medium. It is possible to read determinable information from a medium and restrict reproduction of an unauthorized recording medium based on the read information. This protects the copyright owner's interests from unauthorized duplication of video content.
Abstract
Description
Claims
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US10/512,073 US20060062073A1 (en) | 2003-03-20 | 2004-03-10 | Recording medium and producing method thereof, reproducing method and reproducing apparatus, and copyright managing method |
CN2004800002459A CN1698112B (zh) | 2003-03-20 | 2004-03-10 | 记录媒体及其生产方法、再现方法和再现设备和版权管理方法 |
US14/192,368 US20140177904A1 (en) | 2003-03-20 | 2014-02-27 | Recording medium and producing method thereof, reproducing method and reproducing apparatus, and copyright managing method |
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Also Published As
Publication number | Publication date |
---|---|
US20140177904A1 (en) | 2014-06-26 |
EP1605462A4 (en) | 2011-06-22 |
JP2004288280A (ja) | 2004-10-14 |
US20060062073A1 (en) | 2006-03-23 |
KR101009592B1 (ko) | 2011-01-20 |
CN1698112B (zh) | 2011-01-19 |
JP4043388B2 (ja) | 2008-02-06 |
EP1605462A1 (en) | 2005-12-14 |
TWI272597B (en) | 2007-02-01 |
TW200501114A (en) | 2005-01-01 |
CN1698112A (zh) | 2005-11-16 |
KR20050115200A (ko) | 2005-12-07 |
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