WO2004084549A1 - 記録媒体及びその製造方法、再生方法及び再生装置 - Google Patents
記録媒体及びその製造方法、再生方法及び再生装置 Download PDFInfo
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- WO2004084549A1 WO2004084549A1 PCT/JP2004/002630 JP2004002630W WO2004084549A1 WO 2004084549 A1 WO2004084549 A1 WO 2004084549A1 JP 2004002630 W JP2004002630 W JP 2004002630W WO 2004084549 A1 WO2004084549 A1 WO 2004084549A1
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- video
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- list
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- finger
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- G11B20/0021—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier
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Definitions
- the present invention particularly relates to a recording medium for preventing use of contents such as a movie due to an illegal duplication act, and a method for manufacturing, a reproducing method, and a reproducing apparatus thereof.
- DVD-Video uses the 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 +, DVD + RW is prohibited by CSS contract. Have been. Therefore, copying the entire contents of a DVD-Video copyright-protected in the CSS format to a recordable DVD (bit-by-bit copy) is not a permitted activity under the CSS contract.
- CSS Content Scramble System
- C PRM Co ntent Protection for Recordable Media
- 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 is stored in ROM.
- a pirated version of a film that is converted to a baseband video signal by telecine work without paying for the value of the film to be shown in the movie theater and without obtaining permission to hold the rights, and using this as a source It is possible to produce DVD-Video.
- Breaking CSS encryption De CSS software is distributed on the Internet and is easily available to anyone, who can use it to decrypt it and write it in plaintext on a recordable DVD. Bringing this content to a DVD manufacturing plant to produce DVD-video ROMs Is also possible.
- PCs Personal computers
- CGMSA—A Copy Generation Management System
- macrovision signals and copy restrictions are valid. Since it does not work, it is possible to input the output from the DVD-Video player to the video capture board built into the PC and copy it to the HDD (Hard Disc Drive). Video data once recorded on the HDD can be written to the recordable DVD in plaintext. By bringing this content to the DV D 'manufacturing plant, it is also possible to manufacture DVD-Video that has been ROMized.
- an object of the present invention is to provide a recording medium capable of protecting the interests of a copyright owner from illegal duplication of video content, and a method of manufacturing, a method of reproducing the same, and a reproducing apparatus. Disclosure of the invention
- the invention according to claim 1 is directed to a recording medium on which data of video content is recorded, wherein a plurality of video contents for which reproduction is not permitted by a copyright manager are recorded. It is a recording medium on which the extracted video, finger, printing, and video, which are data, are 'finger, printing, data, and a list'.
- 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, wherein an editing step of editing data of video content, and a copyright manager Video that is extracted from a plurality of video contents that do not permit the recording of a finger, a printing, a video that is data, a finger, a printing, a data, and a data list recording step of recording a list. It is a medium manufacturing method.
- the invention according to claim 5 is a reproducing method for reproducing a recording medium on which data of video content is recorded, wherein a plurality of video contents for which reproduction is not permitted by a copyright manager from the recording medium.
- Each extracted video ⁇ Finger ⁇ Printing ⁇ Video that is data 'Finger ⁇ Printing ⁇ De-night ⁇ Data list reading step to read the list, and the video recorded on the recording medium from the video content to be played ⁇ Fingerprinting 'The video that is stored in memory using the same method as that used to extract the data ⁇ Video ⁇ Fingerprinting ⁇ Extraction steps for extracting data and the extracted video ⁇ Fingerprinting ⁇ Data ⁇ Finger ⁇ Printing ⁇ Day Evening ⁇ List Or read by the data list reading step Video ⁇ Finger ⁇ Printing ⁇ Data ⁇ Data list determination step to determine whether or not the data is included in the list, and the same video 'finger' printing data is included in the data list determination step If it is determined that the playback method is a playback method, the
- the invention according to claim 9 is a reproducing apparatus for reproducing a recording medium on which a video content is recorded, wherein a plurality of videos for which reproduction is not permitted by a copyright manager are recorded from the recording medium.
- Video extracted from the content ⁇ Finger ⁇ Printing ⁇ Video as data ⁇ Finger ⁇ Printing ⁇ Data ⁇
- Data list reading unit that reads the list, and the video content that is played back, recorded on the recording medium Extraction of video, finger, printing, and data in the same way that video, finger, printing, and data were extracted, and the extracted video, finger, and printing data are stored in memory.
- Stored Video ⁇ Finger ⁇ Printing ⁇ Data ⁇ List or Data The video, finger, printing, and data read in the one-list reading step.
- the data list determination unit that determines whether the data is included in the list, and the data list determination unit uses the same video, finger, printing, If it is determined that data is included, the control method restricts the reproduction operation of the recording medium.
- the playback device records the list of video, finger, printing, and data extracted from a plurality of video contents for which the copyright manager does not permit the playback, and the playback device performs the playback.
- Video, finger, and printing data from the recording media to be extracted and if the extracted video, finger, and printing data is included in the list of video, finger, and printing data, write the data.
- Reproduction of the recording medium can be restricted.
- the playback device since the playback device has a memory for storing video fingers and printing data, the playback device extracts video, finger, printing, and data from the recording medium to be played back. If the video, finger, printing, and data are included in the list of video, finger, printing, and data stored in the memory, playback of the recording medium can be restricted.
- FIG. 1 is a schematic diagram showing an example of an entire system configuration (left portion) 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 production process, a production process, and a playback device of a digital video disk 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 disc according to the first embodiment of the present invention.
- FIG. 1 is a schematic diagram showing an example of an entire system configuration (left portion) 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 production process, a production process, and
- FIG. 4 is a schematic diagram showing an example of a configuration of a data recording area in a digital video disk 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 disk 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 playback 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 regular digital video disk playback period, and an illegally duplicated DVD playback period according to the first embodiment of the present invention.
- FIG. 11 is a schematic diagram showing an example of the configuration of a signature list according to the first embodiment of the present invention.
- FIG. 12 is a diagram showing a reproduction-restricted title in the first embodiment of the present invention.
- FIG. 9 is a schematic diagram illustrating an example of a process of changing each area.
- FIG. 10 is a schematic line showing an example of a relationship between a movie screening period, a regular digital video disk playback period, and an illegally duplicated DVD playback period according to the first embodiment of the present invention.
- FIG. 11 is a schematic diagram showing an example of the configuration of a signature list according to the first embodiment of the
- FIG. 13 is a schematic diagram showing an example of the entire system configuration (left part) including a digital video disk production process, a production process, and a playback device according to the second embodiment of the present invention. is there.
- FIG. 14 is a schematic diagram showing an example of an entire system configuration (middle part) including a production process, a production process, and a playback device of a digital video disk according to the second embodiment of the present invention. is there.
- FIG. 15 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 second embodiment of the present invention.
- FIG. 14 is a schematic diagram showing an example of an entire system configuration (middle part) including a production process, a production process, and a playback device of a digital video disk according to the second embodiment of the present invention.
- FIG. 15 is a schematic diagram showing an example of an entire system configuration (right part) including a production process,
- FIG. 16 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. 17 is a schematic diagram showing an example of the configuration of a digital video disc reproducing apparatus for reproducing a digital video disc according to the second embodiment of the present invention.
- FIG. 18 is a schematic diagram showing a flow of a digital video disc editing and production process according to the second embodiment of the present invention.
- FIG. 19 is a schematic diagram showing a flow of a manufacturing process of a digital video disk according to the second embodiment of the present invention.
- FIG. 20 is a schematic diagram showing a processing flow (first half) in the digital video disc reproducing apparatus according to the second embodiment of the present invention.
- FIG. 21 shows a digital video disc according to a second embodiment of the present invention.
- FIG. 18 is a schematic diagram illustrating a processing flow (the latter half) in the playback device.
- FIG. 22 is a schematic diagram showing a flow of processing of a film digital watermark check according to the second embodiment of the present invention.
- FIG. 1 to FIG. 3 show an example of an overall system configuration including a digital video disk production process, a production process, and a playback device. Due to restrictions on the drawing space, the overall system configuration is divided into Fig. 1 to Fig. 3.
- the content owner 110 owns the copyright of the video content, and has ordered the mass production of digital video discs for the purpose of selling digital video discs and selling them for profit. The intended person or group.
- Management organization 120 is a management organization for copyright protection technology, and receives requests from content owners 110, and edits, produces, reproduces, and reproduces digital, video, and discs that have a formal contractual relationship. It is an organization that provides technology and information for operating copyright protection technology for devices, manages parentheses appropriately, and eliminates illegal copying of digital, video, and discs.
- the editing and production process 130 is an editing and production process for video content requested by the content owner 110 and is set up in a digital / video / disc editing studio.
- the mastering process 140 is the process of making a master for mass duplication of digital, video and discs, and is set up in a disc manufacturing factory.
- the disk mass production process 150 is a mass production process for digital video discs, Is placed.
- Digital Video Disc 160 is a mass-produced, read-only digital video disc media that primarily records video audio signals.
- the digital video disc player 170 is a digital video disc 160 player.
- Publishing video content 1 1 1 publishes video content for recording on digital video disc 160.
- the video content is sent directly from the content owner 110 to the editing production process 130 though the management mechanism 120 is used.
- Investigation of unauthorized copy distribution 1 1 and 2 is a distribution investigation mechanism for illegal copies.
- the investigation of distribution of illegal copies here is the act of investigating illegally created / manufactured duplicate media circulating in the market.
- market research is being conducted by a commissioned research company.
- the issue of mass production number 1 13 specifies the mass production number of digital video discs 160 of the title ordered by the content owner 110.
- FIGS. 1 to 3 although the content is passed through the management mechanism 120, it is also possible to directly specify the mass production number from the content owner 110 to the editing and production process 130.
- the issue of motion picture film 1 1 4 is the issue of a new motion picture film.
- New movies shown in movie theaters are generally in the form of films, but in the case of digital cinema, they are compressed video data for theater screenings.
- the signature list is calculated from the film content that you want to protect using finger printing technology, etc., and stored in advance in the playback device so that the playback device can identify illegally leaked content .
- Finger-printing technology is based on extracting the features from the content as finger-printing, and converting the extracted data into finger-printing data. The identification of the content is determined by finger-printing data. It can be used for content search. Fingerprinting of video content is based on the overall average value of the luminance information of the entire still image that composes the moving image.
- Graphs (characteristic data of still images) arranged on the time axis (horizontal axis: number of frames, vertical axis: characteristic data) can be used. Fingerprinting is used for three graphs that use not only the luminance information of the entire still image but also the total average value of each component of Y, Cb, Cr information, and R, G, B information. You can also.
- GUID 1 2 1 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, and is provided via a network from, for example, a copyright management server licensed by the management organization 120.
- the issue of the disc key 1 2 2 is one of the key information for deriving the content key, and issues the disc key to be recorded in advance on the digital video disc 160.
- the issuance of the physical index 1 23 issues a physical index that is recorded in advance on the digital video disc 160 in order to identify that the disk medium is a read-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 on channels different from the normal data area in a way that is difficult to copy. By recording the physical index on digital video discs 160, discs manufactured through regular processes It is possible to determine that the medium is a medium.
- the issue of signature listings 1 2 4 is based on the calculation of characteristic data for identifying illegally created video content using finger printing, etc. Create a list, add the version of the list, and issue it.
- Issue device / disc / relocation / list 1 2 5 issues data to identify illegally created video content playback devices or video content.
- Illegal Copy Monitoring 126 is a monitoring mechanism that detects illegally created and manufactured duplicate media distributed on the market based on data collected from video content playback devices. Issuance of global serial number 1 2 7 issuance of mass production number 1 Issue of global serial number recorded on mass-produced discs according to mass production number of discs issued by issuer 1 1 3 .
- the global 'serial number' is a serial number for all titles, and a unique number is assigned to each disc.
- the global serial number is used as a disk identification number that uniquely identifies each disk in a series of disks.
- the device ID & device key issuance 1 2 8 issues a device ID and a device key stored in the non-volatile memory of the digital video disk playback device 170.
- the device ID is a device re-recorded in advance on the digital video disk 160. Used to identify the playback device when replaying the digital video disk playback device 170 from the list. Is done.
- the device ID is the device key of the device key previously recorded on the digital video disk 160 from the device revocation list pre-recorded on the device key and digital video disk 160. Used to get the read method It is.
- Video WM Enbeda 13 1 is a device for embedding digital watermark information in video content.
- Digital watermarking is a technology that embeds additional information, such as information on the management of copy generation of content and information on 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.
- the digital watermark used in the present invention is one that is hardly visually perceived and does not degrade the video content after embedding. In the figure, the digital watermark is abbreviated as dragon.
- the video WM embedder 13 1 calculates the hash value of the GUID and embeds the hash value in the video signal as digital watermark information.
- the hash value is used to eliminate the correlation between the value embedded as the video watermark and the value recorded in BCA 162 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 GU ID hash value is used as a title message required to guarantee the authenticity of the GU ID.
- the MPEG2 encoder 1 32 is a video compression encoder.
- the MPEG (Moving Picture Experts Group) 2 method is exemplified, but the compression method adopted is not limited to the MPEG 2 method. It 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 141 is a process of encrypting video content with a content key derived from a disc key and a physical index.
- Formatter 142 uses the encrypted video content and the disk used to encrypt it.
- INDEX a signature to identify illegally leaked video content, a list, a disc revocation list to identify illegally duplicated discs, and illegally manufactured or modified playback devices. This is the process of creating a master for mass production of digital, video, and disk 160 from the device, relocation, and list for identification. Replike is a manufacturing process that replicates a large amount of digital video discs 160 from masters.
- the content protection system 17 1 is the control mechanism of the copyright protection technology, and stores the device ID, device key, disk relocation-list and the global serial number of the played digital video disk 160 And a mechanism to report the global / serial / number of playback media to the management mechanism 120 together with the device ID of the digital / video / disk playback device 170 under certain conditions. It also has a mechanism to detect the illegal playback state by referring to the device revocation list, disk relocation list, and signature list, and execute playback restriction.
- FIG. 4 shows an example of the configuration of a data recording area in a digital video disk 160.
- the physical index recording area 16 1 is an area for recording a physical index.
- the physical index is multiplexed and recorded without affecting the original data reading.
- the width of a pit mark or the like, which is main data is partially changed by a modulation signal, and the changed portion can be multiplexed and recorded as main data as main data.
- a method has been proposed in which pits, marks, and the like, which are main data, are shifted from the center position of a recording track, and the deviation is multiplexed and recorded as main data over the main data.
- the secondary data by these recording methods that is, the data of the multiplex part, is the original data.
- the deviation of the main data such as the pit mark, which is the evening, can be read by the playback device using an optical pickup, so that the data recorded in the multiplex part can be read. It does not affect the output of the value conversion circuit.
- Such data recording by multiplex recording is used, for example, to eliminate illegal copying by recording identification information of a recording medium.
- BCA 162 which is a burst 'cutting area' (hereinafter referred to as BCA as appropriate), has a GUID for specifying the title and a global serial that has a different value for each disc. ⁇ The number is recorded. BCA is recorded on disk media after being recorded overnight. In the case of a disk-shaped optical recording medium, the BCA removes the reflective film made of aluminum or the like formed on the inside of the disk, for example, by irradiating it with pulsed laser light modulated in accordance with the recorded information, so that it is elongated in the radial direction Stripes (parcodes) can be formed and formed along the innermost circumference of the disk according to the recorded information.
- Stripes parcodes
- the reproducing apparatus can obtain the data recorded in the BCA by reading the BCA formed in this way with an optical pickup. Even if the data area is copied to another recording medium using a computer or the like, the data recorded in the BCA is not copied, so for example, the ID data on the recording medium or the encrypted data recorded in the data area By recording the key data of the content in the BCA, it is used to prevent the reproduction of the content by the illegally copied recording medium.
- the text and the disc key are recorded in an area that is distinguished from the area where the video content is recorded, for example, in a read-in area 163 in a non-rewritable state.
- the data area 164 is a data area that records encrypted video content in which the hash value of the GUID is embedded as digital watermark information, and a signature list for identifying illegally copied video content. is there.
- FIG. 5 shows an example of the configuration of a digital video disk reproducing device 170 for reproducing a digital video disk 160.
- the ROM discriminator 172 performs discrimination for determining whether the disc mounted on the digital video disc reproducing device 170 is a read-only digital video disc 160 or not. If it is determined that the read-only digital video disk 160 is set, the switch SW 11 is set to the ON state. Otherwise, set to off state.
- the decryptor 173 decrypts the encrypted video content.
- the encryption detector 174 checks whether the digital video disc playback device 170 has not been re-poked and the video content recorded on the digital video disc 160 is 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, the switch SW12 is set to the ON state. Otherwise, set to off state.
- MPEG 2 Decoder 175 decompresses video and converts it to baseband video signal.
- the video WM detector 176 detects video digital watermark information embedded in video content. After detecting the digital watermark information, a hash value of the GUID recorded in the BCA 162 is calculated, and the hash value is compared with the digital watermark information. Confirm that they do not match If so, set the switch SW 13 to the off state. When both match, or while no digital watermark information is detected, the switch SW13 is set to the ON state.
- the disk revocation checker 1777 is registered in the global serial number hash value recorded in the BCA 162 and the disk revocation list stored in the non-volatile memory of the playback device. This is the step of comparing the registered values and checking whether the same values are registered. If the values match, the digital video disc 160 is determined to be revoked, and the switch SW 14 is set to the off state. As long as no match is found, it is set to the on state.
- the value to be compared can be not only the hash value of global / serial / nampa, but also other information such as GUID. As a result, the probability of uniquely identifying the disk can be increased, and the risk of erroneously recalling the authorized disk is reduced.
- the hash function 1 7 8 is a hash function that calculates the hash value of the global serial number pick-up, and is the same as that used when registering the hash value of the global serial number pick-up to disk. 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 global serial narrator can protect the privacy by preventing the user from being able to identify the title watched.
- the hash value of the member is used.
- the non-volatile memory 179 is a non-volatile memory for storing a global serial serial pick-up hash value as a record of the media reproduced by the reproducing apparatus.
- Management mechanism 1 20 and digital ⁇ video ⁇ disk playback device When a network connection with the device 170 is established, the playback media recorded in the nonvolatile memory 179 is stored in the management mechanism 1 2 together with the device ID 189, device serial number 191 and device 1 192. 0, and after transfer, erase the data in this non-volatile memory 1 79 9 to secure free space.
- SSL Secure Socket Layer
- IP sec IP security protocol
- the version checker 180 is a digital video disk 160 that is recorded on a disk. Relocation list. When storing in the non-volatile memory 181, the already stored disk, the revocation list and the digital version Which a version of Bo application list make a comparison if it were a new version. If the version of the data recorded on the digital video disk 160 is newer, the switch SW 16 is set to the ON state and the disk relocation in the nonvolatile memory 18 1 is performed. Update the list data.
- the non-volatile memory 18 1 is a non-volatile memory for storing a disk relocation list.
- the disc relocation list may be transferred from the management mechanism 120 in a state where the network connection between the management mechanism 120 and the digital video disc playback device 170 is established. At this time, the data in the nonvolatile memory 18 1 is updated by the same process as that from the media.
- the version checker 185 is used to store the signature list recorded on the digital video disk 160 when storing the list in the non-volatile memory 186.
- the signature list recorded on the video disc 160 —Compare John with the new version. If the version of the data recorded on the digital video disk 160 is newer, set the switch SW 17 to the ON state to update the data in the nonvolatile memory 186.
- the nonvolatile memory 186 is a nonvolatile memory for storing a plurality of signature lists for, for example, 100 titles.
- the 100 title is, for example, a new movie being shown and has not yet been mass-produced and sold as a digital video disk 160. If the playback device plays this, it is considered to be illegally leaked content.
- the signature list may be transferred from the management mechanism 120 while the network connection between the management mechanism 120 and the digital video disk playback device 170 is established.
- the data in the nonvolatile memory 186 is updated in the same process as the update from the media.
- Finger print data calculation 187 is a process of calculating finger print data from the video content being reproduced.
- the comparator 188 is used to identify the signature list calculated in the finger / printing data calculation 187 and the illegally leaked content stored in the nonvolatile memory 186. This is the process of comparing with the signature list.
- the calculation of finger printing data 187 As long as the operation of 187 is not completed, switch SW15 is set to the ON state. Finger ⁇ Printing ⁇ Data calculation 1 8 7 If the operation is completed and its value is registered in the signature list stored in the non-volatile memory 1 86, the reproduced content will be illegally leaked.
- the content playback operation is interrupted by setting switch SW15 to OFF state. Alternatively, a message indicating that illegal content is being played is superimposed on the playback screen to notify the user.
- the device ID 189 is identification data of the digital video disc reproducing apparatus 170. A unique identification number is distributed for each manufacturer or model of playback device.
- the device key 190 is concealed by encryption etc. recorded on the digital video disk 160 by combining the device ID 189 with the data calculated from the disk revocation list. Deriving and decrypting the obtained disk key.
- the device / serial / numberer 1991 is a manufacturing serial number for specifying a device for each series of devices distributed by the manufacturer of the digital / video / disc player 170.
- the switch SW 11 is a switch for controlling video content reproduction based on the determination result of the ROM discriminator 17 2.
- the switch SW112 is a switch for controlling the reproduction of the video content based on the determination result of the encryption detector 174.
- the switch SW13 is a switch for controlling video content reproduction based on the determination result of the video WM detector 76.
- the switch SW 14 is a switch for controlling the reproduction of the video content based on the result of the disc revocation-checker 1777 determination.
- the switch SW15 is a switch for controlling video content reproduction based on the determination result of the comparator 188.
- the switch SW 16 is a switch for controlling storage of a disk, a relocation list, and the like based on the determination result of the version checker 180.
- Switch SW 17 is a Purgeyon 'checker 18 This is a switch to control the storage of signature lists based on the results.
- FIG. 6 shows the flow of the editing and production process of the digital video disc 160. A description will be given based on the processing flow of the editing and production process of the digital 'video' disk 160 shown in FIG. 6 with reference to the block diagrams showing the entire system configuration in FIGS. 1 to 3.
- An editing production project occurs when digital content, video, and disc content is received from the content owner 110.
- An editing production project for digital, video, and disc production occurs.
- 30 requests the management mechanism 120 to issue a GU ID (step S111).
- the CA in the figure indicates the management mechanism 120.
- the management mechanism 120 Upon receiving the request, the management mechanism 120 issues a unique GUID for each title (step S112). In step S114, the editorial production process 130 receiving the GUID embeds the GUID hash value in the video content (step S113).
- the video WM enbeder 131 provided under the license agreement with the management mechanism 120 calculates the hash value of the GU ID, and uses the hash value as video watermark information in the video content. Embedded in the video signal (step S114).
- step S110 that is, in steps S111 to S114, the editing and production process 130 and the management mechanism 120 constitute a VPN using SSL, IPsec technology, or the like, It is assumed that data can be transmitted and received via a secure network connection.
- Fig. 7 shows the flow of the manufacturing process of the digital and video disk 160. Based on the processing flow of the manufacturing process of the digital video disk 160 shown in FIG. 7, a block diagram showing the overall system configuration in FIGS. 1 to 3 and a disk media relationship diagram in FIG. 4 are shown. It will be described with reference to FIG.
- HD Receive a DVD disc image from the editing and production process 130 (step S 1 2 1). Read out the GUID by expanding the policy descriptor. The GU ID obtained here is transferred from the disk manufacturing factory to the management mechanism 120 (step S122).
- the content owner 110 passes the editing and production video content to the editing and production process 130 and orders the disc production factory for mass production of the disc. At that time, the number of orders is also specified ( Step S 1 2 3).
- the disc manufacturing factory which received the order for mass production of the discs from the content owner 110, transfers the GU ID and the order quantity to the management organization 120, and writes it to each disc to be manufactured. Request issuance of a Nampa (Step S124).
- the management mechanism 120 gives the disc manufacturing plant a license to manufacture the disc, ie, HD—the disc key required to encrypt the DVD disc image, the global 'serial number', device and revocation. Transfer the list of sillons, the list of discs and the list of signatures (step S126).
- the device revocation list is data for restricting the reproduction of a legitimate disc media in an illegally manufactured disc reproducing apparatus.
- the disc repositories list is a reminder to ensure that illegally manufactured disc media is restricted from playing on legitimate disc players, and the signature list is used by content owners 110 in theaters.
- an opportunity to earn box office revenue for the new movie and a legitimate disc media can be obtained by selling pirated disc media before the new movie is sold as disc media.
- the purpose of this program is to prevent the loss of sales revenue from the company, and to identify movies that are or are going to be launched. It is.
- the disc manufacturing plant combines the HD-DVD disc 'image received from the editing and production process 130 with the data received from the management organization 120, and then, based on a license agreement with the management organization 120.
- the HD—DVD disc image is encrypted to create a disc master (master) (step S127).
- Step S 1 2 that is, Step S 1 2 4 to Step S 1 2 In 7, it is assumed that the disk manufacturing factory and the management mechanism 120 constitute a VPN using SSL, IPsec technology, and the like, and are in a state where data can be transmitted and received through a secure network connection.
- Mass production of disk media from disk 'master' (master) (step S128).
- BCA is burned onto the manufactured disk media.
- the BCA records a GU ID that can identify the title and a global serial number that has a different value for each one (step S129).
- FIG. 8 and FIG. 9 show the flow of processing in the playback device of the digital video disk 160.
- 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 161 from the loaded disk medium (step S130).
- the readout method of the fuji-index recording area 16 1 is provided by the manufacturer of the playback apparatus and the components used in the playback apparatus by making a formal contract with the management organization 120.
- step S131 It is determined whether or not the physical index is correctly detected by the reading (step S131). If the playback device does not correctly detect the physical index, the playback operation is stopped and the user is notified of the stop through the user interface. Here, the playback device is assumed to play only the read-only disc medium. If it is possible to play recordable disk media without an index, it is assumed that the process will move to the process for playing back the recordable disk media.
- the playback device When the playback device correctly detects the physical index, the BCA data is read, and the GUID and the global serial number are obtained (step S132). The hash value of the global serial number is calculated, and the playback disk media list stored in the nonvolatile memory 179 is searched (step S133).
- Step S1 3 4 This list is transferred from the digital video disk playback device 170 to the management mechanism 120 when the digital video disk playback device 170 and the management mechanism 120 are securely connected to the network.
- the list recorded in the nonvolatile memory 179 after the transfer is deleted according to the memory availability.
- the disk revocation list stored in the non-volatile memory 18 1 is searched by the hash value of the global serial number (step S 135). If the hash value exists in the disk / revocation list, the playback disk medium is determined to be a revocation target, and the playback operation is stopped, and the user is notified through the user interface that the playback operation has been stopped.
- Step S136 If the hash value does not exist in the disk, revocation list, read out the device in the lead-in area, relocation list, disk, relocation list, and the disk key concealed by encryption, etc. (step S136). This information is stored in the disc recorded on the disc. Required to decode encoded video content. The technology for decrypting this 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 organization 120. Device ⁇ Revocation ⁇ List and disk ⁇ Relocation ⁇ List can be read correctly, playback device is device ⁇ Relocation ⁇ Disk not liable to be re-listed by encryption, etc. It is determined whether or not it is (Step S137).
- the device / relocation 'list or disk revocation list could not be read correctly, or the playback device was revoked in the device / relocation' list and correctly reads the concealed disk key by encryption. If it is determined that the video content has not been properly encrypted and recorded, for example, when the playback has not been completed, the playback operation is stopped and the user is informed that the operation has been stopped through the user interface.
- the system waits until a video watermark embedded in the video signal is detected until a certain time elapses (step S140). If after a certain period of time, or after processing a certain amount of streams, no video watermark has been detected, the playing disc media will contain video content created by an unauthorized editing process. If there is, stop the playback operation and notify the user via the user interface that the playback has stopped.
- This video 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 120.
- step S14 If a video digital watermark is detected within a certain period of time or within a certain processing amount, it is checked whether the digital watermark information indicates the same value as the hash value of the GU ID (step S14). 1) If they do not match, the playback disc media is determined to be video content created by an unauthorized editing process or disc media manufactured by an unauthorized manufacturing process, and playback is stopped. Inform the user of the stoppage through the one-interface. If they match, the reproducing operation is continued (step S142).
- the video signal characteristic data of the video signal is calculated (step S144). After the calculation is completed, the signature list stored in the non-volatile memory 186 is searched, and it is confirmed whether or not the matching video finger 'printing data' is registered (step S144).
- play the disc media Has illegally obtained a film shown in a theater and edited it using it as a source. It is determined that the video content is manufactured, and the reproduction operation is stopped, and the user is notified of the stop through the user interface. If there is no registration, it is confirmed that the disc media is edited, produced and manufactured based on a regular contract, and normal playback operation is guaranteed.
- the GUID and the hash value of the GUID are recorded on the digital video disk 160 by two different recording methods.
- the GUID is recorded on the BCA of the disk media.
- the hash value of the GUID is embedded as digital watermark information in the video content to be converted to digital video.
- the digital video disc playback device 170 reads the GU ID from the BCA, compares the hash value of the read GU ID 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 130 approved by the management organization 120 can be converted into the disc manufacturing process (mastering process 140, disk mass production process 1) also authorized by the management organization 120.
- the digital video disc playback device 170 can confirm that the data was recorded on the digital video disc 160 manufactured in 50).
- the video signal obtained by illegally editing the video signal in an illegal 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 170, This makes it possible to restrict the playback.
- CCI Copy Control Information
- the GU ID information embedded as digital watermark information is correct. This is compared with the GUID information separately recorded in the BCA of the disk media, and playback is permitted with a match, so the digital watermark information cannot be detected. Attack makes no sense. 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 by the management mechanism 120 is recorded on the digital video disk 160 in the masking step 140.
- This physical index is multiplex-recorded on a read-only disk medium without affecting the original data reading.
- the digital video disk reproducing device 170 is configured to perform a reproducing operation when a physical index is detected from a reproduced disk. This allows the digital video disk playback device 170 to confirm whether or not it is a read-only disk / media manufactured at a disk manufacturing factory licensed by the management organization 120. Make it possible.
- the video content recorded on the digital video disk 160 is encrypted.
- the digital video disc reproducing apparatus 170 can determine whether the illegally obtained video signal is a disc medium manufactured and distributed by an unauthorized disc manufacturing factory or not. Check if the disc is a read-only disc media by detecting the physical 'index in 7 2, and encrypt the video content of the digital video disc 160 by the encryption detector 1 7 4. It can be identified by two means, that is, confirmation of the existence, and it is possible to restrict the reproduction.
- the number of discs that If you try to make extra hardware 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 120 connected to the digital video disk playback device 170 and the network. Therefore, it is possible to manage the disk manufacturing factory, which has been authorized by the management mechanism 120, so that the disk manufacturing will not be performed in excess of the ordered number.
- the hash value of global / serial / nampa is sent to the network, the title cannot be specified from the hash value, and the privacy of the user can be protected.
- feature data for specifying video content from film content shown in a movie theater or the like is calculated using a technique such as finger printing, and the digital video is calculated.
- the digital video disk playback device 170 calculates finger printing data of the video content being played in calculation 187 of finger printing data when playing the disk.
- the comparator 188 compares the calculated finger printing data with the latest signature list stored in the non-volatile memory 186. If the two match, the reproduction is stopped. I do.
- the digital video disc playback device 1700 checks whether the reproduced disc media is pirated disc media manufactured from the video signal illegally leaked from the movie theater where the new movie is being shown. This makes it possible to restrict playback.
- Figure 10 shows the movie showtimes and regular DVD
- the following shows an example of the relationship between the playback timing and the playback restriction period of an illegally copied DVD.
- Fig. 10 for example, restrict the playback of illegally duplicated DVDs until a new movie is released in theaters in the order of titles A, B, C,... and a regular DVD is released. Shall be.
- the digital video disk player 170 plays the digital video disk of Title X, and the digital video disk player 170 ⁇
- the printing restriction title of the printing database is updated to Title A, B, C,... according to the title X digital ⁇ Video ⁇ Signature recorded on the disc ⁇ List.
- the signature / list of the title / digital / video disc recorded on the title A digital / video disc is newer than the signature / list of the title X digital / video disc.
- the playback restriction title of the fingerprint printing database in the digital video disk playback device 170 is updated to the titles B, C, D, ... excluding the title A of the own device.
- the signature list of the digital video disk of the digital video disk playback device 170 can be changed according to the new signature list of the digital video disk of the title A recorded on the digital video disk of the title B.
- Restrictions on the printing database are updated to titles C, D, E,... excluding the title B of the printing.
- the latest signature list updates the playback restricted title of the finger printing database in the digital video disc playback device 170.
- FIG. 11 shows an example of the configuration of the signature list.
- the signature list shown in FIG. 11 is composed of purge information and finger printing data of titles A, B, C,... Finger —
- the printing data consists of a title ID assigned to each title and a feature extraction data of the title.
- Played digital video ⁇ Video's disc finger ⁇ Printing ⁇ Data and digital video ⁇ Video ⁇ Disc playback device 170 Signature in the list ⁇ Printing by list 'Printing' ⁇ When the data matches, playback Restrictions apply.
- the title ID of the referenced finger, printing, and data is stored in non-volatile memory in the digital, video, and disk playback device 170, and the management mechanism 120
- the title ID is transferred to the copyright management server along with the region 'code of the digital / video / disc player 170 to the copyright management server.
- the management server can know which title movie is illegally distributed in which region. This can contribute to early detection of traders who distribute pirated copies. If the digital video disk playback device 170 is equipped with a GPS (global position system), transmitting the location information also makes it easier to identify the area.
- Figure 12 shows a digital video using region 'code'
- the following is an example of updating the signature list when the release date of Isk differs in each region.
- the list selector 202 the same signature list as the region 'code 203 in the player is selected, and the data in the nonvolatile memory 186 is updated.
- the title of the movie whose playback is restricted can be changed for each region.
- the signature list of the copyright management server 201 approved by the management mechanism 120 is configured for each region code, and the list selector 204 is the same as the region code 203 in the player
- 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. 13 to 15 show an example of an overall system configuration including a digital video disk production process, a production process, and a playback device. The entire system is divided into Fig. 13 to Fig. 15 due to drawing space restrictions.
- the content owner 110 owns the copyright of the video content and wants to make it profitable by selling it on digital video discs.
- Management organization 120 is a management organization for copyright protection technology, which is requested by the content owner 110, and has a formal contractual relationship with digital video-disc editing, production, production, and playback. It is an organization that provides technology and information for operating copyright protection technology for devices, manages parentheses appropriately, and eliminates illegal copying of digital, video, and discs.
- the editing and production process 130 is an editing and production process for video content requested by the content owner 110 and is set up in a digital / video / disc editing studio.
- the mastering process 140 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 150 is a mass production process of digital-video discs, and is installed in a disk manufacturing factory.
- the digital video disk 160 is a mass-produced, read-only digital video disk media that mainly records video audio signals.
- the digital video disc player 170 is a digital video disc 160 player.
- Publishing video content 1 1 1 publishes video content for recording on a digital 'video disk 160'.
- the video content is sent directly from the content owner 110 to the editing and production process 130, but it can also be sent via the management mechanism 120.
- Investigation of distribution of illegal copy 1 1 2 is the distribution inspection mechanism of illegal copy. The investigation of the distribution of illegal copies here is the act of investigating illegally created / manufactured duplicate media that is distributed in the market. Survey currently commissioned The company is conducting market research.
- the issue of mass production number 1 13 specifies the mass production number of digital video disk 160 of the title ordered by content owner 110.
- mass production is specified directly from the content owner 110 to the editing and production process 130, but it is also possible to specify it through the management mechanism 120. is there.
- motion picture film 1 1 4 is the issue of a new motion picture film.
- New movies that are screened in movie theaters are generally in the form of films, but the format of digital cinema is compressed video for theater screening.
- mass-produced digital video discs are obtained by shooting a movie shown in a movie theater with a digital video camera or by converting the video signal obtained by telecine conversion into a digital video disc 160.
- the signature list is calculated from the film content that you want to protect using finger printing technology, etc., and stored in advance in the playback device so that the playback device can identify illegally leaked content .
- GUID 1 2 1 issues a global unique ID (GUID Universal ID) distributed for each title.
- the 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 licensed by the management mechanism 120.
- the issue of the disc key 1 2 2 is one of the key information for deriving the content key, and issues the disc key to be recorded in advance on the digital video disc 160.
- Issuance of physical index 1 2 3 issues a physical index recorded in advance on a digital video disc 160 for the purpose of identifying that the disk medium is a read-only medium. In the second embodiment, it is also used as one of key information for deriving a content key.
- Physical Index is a read-only media This is recorded only on a channel different from the normal data area in a way that is difficult to copy. Physical Index to Digital Video Disc
- List publication 1 2 4 calculates the characteristic data for identifying illegally produced video content by using fingerprinting and other technologies, and calculates this using, for example, a list of 100 titles. And issue it with the version of the list added.
- Device / disk ⁇ Relocation ⁇ List publishing 1 25 issues data to identify the video content playback device or video content that has been illegally created and manufactured.
- Monitoring of unauthorized copying 1 26 is a monitoring mechanism that detects illegally created and manufactured duplicate media distributed on the market based on data collected from video content playback devices.
- the device ID & device key issuance 1 2 8 issues a device ID and a device key stored in the non-volatile memory in the digital video disk player 170.
- the device ID is used to identify the playback device when recalling the digital video disk playback device 170 from a device pre-recorded on the digital video disk 160, a relocation list, or the like. Used.
- the device ID can be obtained from the device rekey list, which is pre-recorded on the device-key and the digital video disk 160, from the disk key pre-recorded on the digital video disk 160. It is used when acquiring the readout method.
- Video WM Enbeda 13 1 is a device for embedding digital watermark information in video content.
- Video WM1 3 1 1 calculates the GUID hash value, and uses the hash value as digital watermark information in video Embed in the issue.
- a hash value is used to eliminate a correlation between a value embedded as a video digital watermark and a value recorded in BCA 162 described later.
- the GUID hash value is used as a title message required to guarantee the authenticity of the GUID. Since the digital watermark and the hash value have been described in the first embodiment, the description is omitted here.
- the MPEG2 encoder 1332 is a video compression encoder.
- the MPEG 2 system is exemplified, but the compression system adopted is not limited to the MPEG 2 system. Includes the task of configuring files that can be managed by the file system, and the GUID is recorded in the poly-descript.
- the video encryptor 1441 is a process of encrypting video content with a content key derived from a disc key and a physical index.
- Formatters 1 4 2 include encrypted video content, disk keys and filing index used to encrypt it, signatures list to identify illegally leaked video content, illegal Mass production of digital-video discs 160 from disc revocation lists to identify discs that have been duplicated in the device, and devices to identify playback devices that have been illegally manufactured or modified This is the process of creating a master to perform. Replike is a manufacturing process that replicates a large amount of digital video discs 160 from masters.
- the content protection system 171 is the control mechanism of the copyright protection technology.
- the device ID, device key, disk relocation list and the reproduced digital video disk 160 ⁇ A mechanism for storing a pick-up and a mechanism for reporting the playback media disk 'unique ⁇ number under a certain condition to the management mechanism 120 together with the device ID of the digital ⁇ video ⁇ disk playback device 170. It also has a mechanism to detect the illegal playback state by referring to the device / relocation list, disk relocation list, and signature list, and execute playback restriction.
- the disc-number pick-up consists of a random number unique to each disc obtained by scrambling the serial number etc. for all titles and its verification value.
- the verification value is calculated by MDC (Message Digest Code) or MAC (Message Authentication Code) using GUID as a key.
- the disk's unique number is used as a disk identification number for uniquely identifying each disk in a series of disks.
- FIG. 16 shows an example of the configuration of a data recording area in the digital video disk 160.
- the physical index recording area 16 1 is an area for recording a physical index.
- the physical * index is multiplexed and recorded without affecting the original data readout. In this recording method, even if the original data is read out over the entire area of the disc and copied, Since the physical index is not copied, it is effective for whole copy (bit-by-bit copy).
- a GU ID for specifying a title and a disc, a unique number, and a different number for each disc are recorded.
- the BCA is recorded on the disk media after the data is recorded.
- the specific recording method of the physical index and the BCA has been described in the first embodiment, and the description is omitted here.
- 'Revocation' list, disc 'Relocation list', and disc 'key' are areas that cannot be rewritten to areas where video content is recorded, for example, lead-in area 163 Recorded in.
- the data area 164 is a data area in which the encrypted video content in which the GUID hash value is embedded as digital watermark information is recorded.
- FIG. 17 shows an example of the configuration of a digital video disk playback device 170 for playing back a digital video disk 160.
- the ROM discriminator 172 performs discrimination to determine whether the disc mounted on the digital video disc reproducing apparatus 170 is a read-only digital video disc 160 or not. If it is determined that the read-only digital-video disk is 160, set the switch SW 11 to the ON state. Otherwise, set to off state.
- Decrib 173 decrypts the encrypted video content.
- the encryption detector 174 checks whether the digital video disk playback device 170 has not been re-poked and whether the video content recorded on the digital video disk 160 has been encrypted and recorded. An inspection is performed. If the playback device has not been re-poked and the video content has been encrypted and recorded, switch SW12 is set to the ON state. Otherwise, set to off state.
- the MPEG2 decoders 175 and 192 decompress the video and convert it to a baseband video signal.
- the video WM detectors 1 ⁇ 6 detect video digital watermark information embedded in video content. After detecting the digital watermark information, a hash value of the GU ID recorded in the BCA 162 is calculated, and the hash value is compared with the digital watermark information. That they do not match After confirming the above, set the switch SW 13 to the off state. If the two match, or while no digital watermark information is detected, the switch SW13 is set to the ON state.
- the disk revocation checker 1 7 7 is registered in the disk unique number recorded in BCA 16 2 and the disk repo list stored in the non-volatile memory of the playback device. This is a process to compare the registered values and check whether the same values are registered. If the values match, the digital video disk 160 is determined to be revoked, and the switch SW 14 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 179 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 recorded data in the nonvolatile memory 179 is stored in the device ID 1 89, Device ⁇ Serial 'Transfers to the management mechanism 120 with the number 191, and after the transfer, erases the data in the non-volatile memory 179 to secure free space.
- Encryptiation such as SSL authentication and VPN based on IPsec encryption is performed.
- Version checker 180 can be used for digital video disk 160 Reproduced list is stored in non-volatile memory 181 when already stored disk Relocation list Version and the version recorded on the digital video disc 160 on the disk relocation list and compare which is the newer version. If the version of the data recorded on the digital .video disc 160 is newer, Touch switch 16 is set to the ON state to update the data in the disk location list in nonvolatile memory 18 1.
- the non-volatile memory 18 1 is a non-volatile memory for storing a disk 'relocation list.
- the disk / relocation list may be transferred from the management unit 120 in a state where the network connection between the management unit 120 and the digital video disk playback device 170 is established. At this time, the data in the nonvolatile memory 18 1 is updated by the same process as that from the media.
- the version of the signature list and the version of the signature list already stored are stored.
- Video ⁇ Signature recorded on disk 160 ⁇ Version comparison of list and which is newer. If the version of the data recorded on the digital video disk 160 is newer, the switch SW 17 is set to the ON state to update the data in the nonvolatile memory 186.
- the nonvolatile memory 186 is a nonvolatile memory for storing a plurality of signature lists for, for example, 100 titles.
- the 100 title is, for example, a new movie being shown and is not yet sold in production as a digital video disk 160. If the playback device plays this, it is considered to be illegally leaked content.
- the signature list may be transferred from the management mechanism 120 while the network connection between the management mechanism 120 and the digital video disk playback device 170 is established.
- the update of the data in the nonvolatile memory 186 is performed in the same process as the update from the media. Is
- Calculation of finger printing data 187 is a process of calculating finger printing data from the video content being reproduced.
- the comparator 188 is used to identify the signature list calculated in the fingerprint 'printing data calculation 187 and the illegally leaked content stored in the nonvolatile memory 186. This is the process of comparing with the signature list.
- Switch SW 15 is set to the ON state while the calculation of finger 187 printing data 187 is not completed. Fingerprinting data calculation If the operation of 187 is completed and its value is registered in the signature list stored in the non-volatile memory 186, the reproduced content is illegally leaked.
- the content playback operation is interrupted by setting switch SW 15 to the off state. Alternatively, a message indicating that illegal content is being played is superimposed on the playback screen to notify the user.
- the device ID 189 is an identification device of the digital video disk reproducing device 170. A unique identification number is distributed for each manufacturer or model of playback device.
- the device key 190 can be concealed by combining the device ID 189 with the data calculated from the disk revocation list, digital video, and encryption recorded on the disk 160. Derived disk key is derived.
- the device / serial / numberer 1911 is a manufacturing serial number for identifying a device for each series of devices distributed by the manufacturer of the digital video / disc player 170.
- the switch SW 11 is a switch for controlling video content reproduction based on the determination result of the ROM discriminator 17 2.
- the switch SW12 is a switch for controlling video content reproduction based on the determination result of the encryption detector 174.
- the switch SW13 is a switch for controlling video content reproduction based on the determination result of the video WM detector 176.
- the switch SW 14 is a switch for controlling the reproduction of the video content based on the determination result of the disc's reversal check.
- the switch SW15 is a switch for controlling video content reproduction based on the determination result of the comparator 188.
- the switch SW16 is a switch for controlling storage of the disk revocation list based on the determination result of the version 'checker 180'.
- the switch SW17 is a switch for controlling the storage of the signature list based on the determination result of the version 'checker 1885.
- FIG. 18 shows the flow of the editing and production process of the digital video 'disc 160'. A description will be given based on the processing flow of the editing / production process of the digital video disk 160 shown in FIG. 18 with reference to the block diagrams showing the overall system configuration in FIGS. 13 to 15.
- An editorial project is created by receiving video content desired to be digital, video, or disc from content owner 110.
- the editing production process 130 requests the management organization 120 to issue a GUID (step S311).
- the CA in the figure indicates the management mechanism 120.
- the management organization 1 200 will have a unique GU ID for each title Is issued (step S3 1 2).
- the editing production process 130 receiving the GU ID embeds the hash value of the GU ID in the video content (step S313).
- the video WM embedder 131 which was provided based on the license agreement with the management mechanism 120, calculates the hash value of the GU ID, and then uses the hash value as digital watermark information for the video content. Embedded in the video signal (step S314).
- step S310 that is, in steps S311 to S314, the editing and production process 130 and the management mechanism 120 constitute a VPN using SSL, IPsec technology, etc. It is assumed that data can be transmitted and received via a secure network connection.
- Each file / data is multiplexed, and the GUID is recorded in the volume / desktop, which is file system management information (step S316).
- FIG. 19 shows the flow of the manufacturing process of the digital video disk 160.
- the block diagram showing the overall system configuration in FIGS. 13 to 15 and the block diagram in FIG. This will be described with reference to a disk media diagram.
- HD Receiveive the DVD disc image from the editing and production process 130 (step S 3 2 1). Expand the volume 'descriptor' and read out the GU ID.
- the GU ID obtained here is transferred from the disk manufacturing factory to the management mechanism 120 (step S32).
- the content owner 110 passes the editing / production video contents to the editing / production process 130 and places an order for the mass production of the disc with the disc manufacturing factory.
- the disc manufacturing factory which received the order for mass production of the discs from the content owner 110, transfers the GU ID and the number of ordered discs to the management mechanism 120, and writes the discs to be manufactured one by one. Is requested (step S324).
- the management mechanism 120 specifies the title of the video content from the GUID received from the disc manufacturing factory.
- disc media manufactured from the order quantity received will be used strictly for unused discs and unique pick-ups consisting of unique random numbers and their verification values for all titles. It is calculated (step S325).
- the verification value shall be calculated by a method such as MDC or MAC using GU ID as a key.
- the management mechanism 120 grants the disc manufacturing factory a license to manufacture the disc, ie, the HD's required to encrypt the DVD disc image, the disc's key, the disc's unique number type, the device's revocation. ⁇ List, disk ⁇ Revocation ⁇ List, Signature-Transfer the list (step S 326).
- the device / relocation list is data for restricting the reproduction of a legitimate disc media in a disc reproduction device manufactured illegally.
- the 'List' is data for restricting the reproduction of illegally manufactured disk media on a legitimate disk playback device.
- Signature List is a new way for content owners to publish new movies in theaters and sell disc media manufactured by piracy before the new movie is sold as disc media.
- the purpose of this program is to identify the movies that are or are going to be launched, with the goal of earning the box office revenue of the movie and the sale of the regular disc media.
- the disc manufacturing plant combines the HD-DVD disc image received from the editing and production process 130 with these data received from the management organization 120, and furthermore, based on a license agreement with the management organization 120.
- the disk manufacturing factory and the management mechanism 120 constitute a VPN using SSL, IPsec technology, etc., and are in a state where data can be transmitted / received by secure network connection.
- master master
- Mass production of disk media from the disk master (master) (step S328). Burn the BCA onto the manufactured disc media.
- a GU ID that can identify the title and a disc unique record that has a different value from one to another are recorded (step S32 9) 0
- FIG. 20 and FIG. 21 show the processing flow in the digital video disc 160 reproducing apparatus. Processing due to restriction of drawing space Is divided into FIG. 20 and FIG. 21. Fig. 20 and Fig. 2
- the reproducing device reads the physical index recording area 161 from the loaded disk medium (step S330).
- the reading method of the filing index storage area 161 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 120.
- step S331 it is determined whether or not the physical index is correctly detected. If the playback device fails to detect the physical index correctly, it is determined that the content is a disc media other than the read-only disc media whose content has been encrypted by the encryption method described in the second embodiment, and will be described later. Processing shifts to finger printing, data check.
- the reproducing apparatus reproduces only the reproduction-only disc media, it is assumed that the reproducing operation is stopped and the user is notified of the stop through the user interface.
- the playback device If the playback device correctly detects the physical index, it reads the BCA data and gets the GUID and disk unique 'number.
- Step S3332 the validity of the obtained disk, unique, and pick-up is confirmed by the verification value (step S333). If the validity is not confirmed, the disc media is judged to be an illegally manufactured disc media, and the playback operation is stopped and the user is notified via the user interface that the operation has been stopped. If the validity is confirmed, the process proceeds to step S334. To determine whether a read-only disc media with the same value as the disc's unique number has been played in the past, the playback disc media list stored in the non-volatile memory 179 is checked. Search (step S3 3 4).
- step S336 If the same value exists in the reproduction disk / media / list, the process proceeds to step S336. If the same value does not exist in the playback disk / media list, the value is stored in the nonvolatile memory 179 (step S335). When the digital video disk playback device 170 and the management mechanism 120 are securely connected to the network, this list is transmitted from the digital video disk playback device 170 to the management mechanism 120. The list recorded in the non-volatile memory 179 after the transfer is deleted according to the memory availability.
- the disk relocation list stored in the non-volatile memory 18 1 is searched by the value of the disk's unique number (step S336). If the same value exists in the disc / relocation list, the playback media is judged to be revoked, and the playback operation is stopped and the user is notified via the user interface that the playback has been stopped. If the same value does not exist in the device, the device relocation list, the disk relocation list, and the disk key concealed by encryption or the like in the lead-in area are read out (step S333). This 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 organization 1.20.
- the list was read correctly, or the playback device It is determined whether or not the disk key concealed by encryption or the like, which is not the target of the repo by the strike, was correctly read (step S338).
- the device / relocation list / disk relocation list could not be read correctly, or the playback device was a device / relocation / list and the disk / key which was concealed by encryption etc. If it is determined that the video content is not properly encrypted and recorded, for example, if the video cannot be read correctly, the playback in which the content is encrypted by the encryption method described in the second embodiment will be performed.
- the device, revocation, list, disk, revocation list, encryption, etc. can correctly read the concealed disk key, read the temporary storage area and obtain the signature list.
- These lists contain version information.
- the list in the non-volatile memory 18 1 is retrieved. Update. If a newer signature list is acquired than the previous signature list stored in the nonvolatile memory 1886, the list in the non-volatile memory 1886 is updated (step S). 3 3 9).
- the FIF 0 First-InFirst-Out
- the data read from the data area The playback of the encrypted video content thus started is started (step S340).
- the system waits until a video watermark embedded in the video signal is detected until a certain time elapses (step S3341). 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. When it is determined that there is, the reproduction operation is stopped, and the user is informed of the stop through the user interface.
- This video 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 120.
- a video digital watermark is detected within a certain period of time or within a certain processing amount, it is checked whether or not the digital watermark information indicates the same value as the GUID hash value (step S3342). ). 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. Inform the user of the stoppage through the face. If they match, the playback operation is continued.
- the medium is a disk other than the read-only disk medium in which the content is encrypted by the encryption method described in the second embodiment, that is, a read-only disk medium or a recordable disk in which the content is not encrypted
- a read-only disk medium or a recordable disk in which the content is not encrypted When playing video content recorded on media or video content recorded on disc media of different formats, such as DVDs and SVCDs, it is illegal to calculate finger, print, and data while playing. Is determined.
- FIG. 22 shows the processing flow at that time.
- the finger printing data check process shown in FIG. 22 calculates the video data's printing data, which is the feature data of the video signal, while the video content is being played back (step S3 43 ). After the calculation is completed, the signature list stored in the non-volatile memory 186 is searched, and it is confirmed whether the matching video, finger, printing, and data are registered (step S3444).
- the playback disc media illegally obtains the work shown in the theater and uses it as a source for editing and production. Is stopped and the user is notified of the stop through the user interface. If there is no registration, it will be confirmed that the disc is a media that has been edited, produced and manufactured based on a regular contract, and normal playback operation will be guaranteed.
- the GUID and the hash value of the GUID are recorded on the digital video disk 160 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 digital, video, and disc video content.
- the digital / video / disk playback device 170 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 130 which was approved by the management organization 120, was converted to the disc manufacturing process (mastering process 140, disk mass production), which was also approved by the management organization 120.
- the digital video disc reproducing device 170 can confirm that the digital video disc 160 produced in the step 150) has been recorded. Therefore, the video signal obtained illegally can be video-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 player 170. This makes it possible to restrict the playback.
- the information of the GUID embedded as the digital watermark information is correctly detected and compared with the information of the GUID separately recorded in the BCA of the disk medium, 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 the cost reduction of the playback device to which the new technology is applied. Also, in the second embodiment of the present invention, in the mastering step 140, the physical index issued from the management mechanism 120 is recorded on the digital video disk 160. This physical index is multiplex-recorded on a read-only disk medium without affecting the original data reading.
- the digital video disk reproducing device 170 is configured to perform a reproducing operation when a physical index is detected from a reproduced disk. This allows the digital video disk playback device 170 to confirm whether or not it is a read-only disk / media manufactured at a disk manufacturing factory licensed by the management organization 120. Make it possible.
- the video content recorded on the Digital Video Disc 160 is encrypted.
- the digital / video / disk reproducing apparatus 170 can determine whether or not the illegally obtained video signal is a disk / media that has been manufactured and distributed by an unauthorized disk manufacturing factory.
- 7 A read-only disk based on physical index detection in 2 Can be identified by two means, that is, whether the media content is encrypted and whether the video content of the digital video disk 160 is encrypted by the encryption detector 174. Therefore, 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 a management mechanism 120 connected to the digital / video / disk playback device 170 via a network. Therefore, in a disk manufacturing factory that has been approved by the management mechanism 120, it is possible to manage the disk so that the number of disks that have been ordered is not exceeded. Furthermore, by using a disk unique number for each disk, the title cannot be specified from the disk unique number even if this data is sent to the network, protecting the privacy of users. It becomes possible.
- feature data for specifying video content from film content displayed in a movie theater or the like is calculated by using a technique such as finger printing, and the digital data is calculated.
- the digital / video / disc player 170 calculates the finger / printing / data when playing the disc.
- the video / finger / printing / data of the video content being played is calculated.
- the comparator 188 compares the calculated video, finger, printing, and data with the latest signature list stored in the nonvolatile memory 186. Stop playback.
- the digital, video, and disk playback device 1700 can check whether it is a pirated disk media manufactured from a video signal that has been illegally leaked, and it is possible to add playback restrictions It becomes.
- a specific example of the playback restriction using the signature list, the fingerprint, the printing data according to the second embodiment is the same as that described with reference to FIG. 10 in the first embodiment. The description is omitted.
- the present invention is not limited to the embodiment 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.
- the present invention is not limited to this. If the title can be specified, another allocation such as a digital / video / disk manufacturing request can be performed. May be better.
- the GUID is recorded in the BCA, and the hash value of the GUID is recorded as digital watermark information of the video content.
- the authenticity of the digital watermark information value and the BCA value is determined.
- other combinations may be used, such as recording the GUID as digital watermark information of video content and recording the hash value of the GUID in the BCA.
- the present invention is not limited to this. Multiple recording may be performed in the 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 revocation list of the first and second embodiments described above The disc and key are recorded in the lead-in area before the manufacturing process by Replicate, but this is not a limitation. For example, when the data volume is large, the data may be encrypted and recorded in the data area. .
- the judgment is made by the global, serial, pick-up or disk-unique pick-up, and then the judgment 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.
- the playback device can record the latest list of videos, fingers, printing, and data of a plurality of video contents for which playback is not permitted.
- the video, finger, printing, and data are extracted from the video content to be played, and the extracted video, fingerprints, and printing are used to determine whether the media is a legitimate recording medium based on the data and the list. It is possible to discriminate and restrict the reproduction of the unauthorized recording medium. Therefore, it is possible to protect the interests of the copyright holder from illegal duplication of video contents.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US10/513,577 US20050238324A1 (en) | 2003-03-20 | 2004-03-03 | Recording medium and production method, playback method, and playback device thereof |
EP04716744A EP1605695A4 (en) | 2003-03-20 | 2004-03-03 | RECORDING MEDIUM AND MANUFACTURING METHOD, PLAYING METHOD AND PLASTER DEVICE THEREFOR |
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JP2003078376A JP2004288281A (ja) | 2003-03-20 | 2003-03-20 | 記録媒体及びその製造方法、再生方法及び再生装置 |
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CN (1) | CN100527812C (ja) |
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KR20070009983A (ko) * | 2004-01-22 | 2007-01-19 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | 콘텐츠로의 액세스를 인증하는 방법 |
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- 2004-03-03 CN CNB2004800002389A patent/CN100527812C/zh not_active Expired - Fee Related
- 2004-03-03 WO PCT/JP2004/002630 patent/WO2004084549A1/ja active Application Filing
- 2004-03-03 US US10/513,577 patent/US20050238324A1/en not_active Abandoned
- 2004-03-03 KR KR1020047018769A patent/KR20050122172A/ko not_active Application Discontinuation
- 2004-03-03 EP EP04716744A patent/EP1605695A4/en not_active Withdrawn
- 2004-03-19 TW TW093107513A patent/TWI272594B/zh active
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Also Published As
Publication number | Publication date |
---|---|
EP1605695A1 (en) | 2005-12-14 |
CN1698364A (zh) | 2005-11-16 |
CN100527812C (zh) | 2009-08-12 |
TW200511255A (en) | 2005-03-16 |
US20050238324A1 (en) | 2005-10-27 |
TWI272594B (en) | 2007-02-01 |
EP1605695A4 (en) | 2010-09-08 |
KR20050122172A (ko) | 2005-12-28 |
JP2004288281A (ja) | 2004-10-14 |
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