WO2000052691A1 - Enregistreur permettant d'enregistrer des copies de production sur la base d'un attribut de copie incruste sour forme de filigrane dans la production, appareil de reproduction capable de reproduire la copie enregistree, support enregistre, procede d'enregistrement et procede de reproduction - Google Patents
Enregistreur permettant d'enregistrer des copies de production sur la base d'un attribut de copie incruste sour forme de filigrane dans la production, appareil de reproduction capable de reproduire la copie enregistree, support enregistre, procede d'enregistrement et procede de reproduction Download PDFInfo
- Publication number
- WO2000052691A1 WO2000052691A1 PCT/JP2000/001013 JP0001013W WO0052691A1 WO 2000052691 A1 WO2000052691 A1 WO 2000052691A1 JP 0001013 W JP0001013 W JP 0001013W WO 0052691 A1 WO0052691 A1 WO 0052691A1
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- WIPO (PCT)
- Prior art keywords
- copy
- recorded
- recording medium
- recording
- embedded
- Prior art date
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/913—Television signal processing therefor for scrambling ; for copy protection
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
- G11B20/00094—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised record carriers
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
- 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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
- G11B20/00731—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction
- G11B20/00746—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction wherein the usage restriction can be expressed as a specific number
- G11B20/00753—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction wherein the usage restriction can be expressed as a specific number wherein the usage restriction limits the number of copies that can be made, e.g. CGMS, SCMS, or CCI flags
- G11B20/00768—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction wherein the usage restriction can be expressed as a specific number wherein the usage restriction limits the number of copies that can be made, e.g. CGMS, SCMS, or CCI flags wherein copy control information is used, e.g. for indicating whether a content may be copied freely, no more, once, or never, by setting CGMS, SCMS, or CCI flags
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
- G11B20/00884—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a watermark, i.e. a barely perceptible transformation of the original data which can nevertheless be recognised by an algorithm
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/913—Television signal processing therefor for scrambling ; for copy protection
- H04N2005/91307—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal
- H04N2005/91328—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal the copy protection signal being a copy management signal, e.g. a copy generation management signal [CGMS]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/913—Television signal processing therefor for scrambling ; for copy protection
- H04N2005/91307—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal
- H04N2005/91335—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal the copy protection signal being a watermark
Definitions
- the present invention relates to a protection technology for protecting the reproduction right of a work by embedding a copy attribute in a work as a digital watermark.
- the present invention relates to a reproducing apparatus, a recording medium, a recording method, and a reproducing method for reproducing a copied product.
- a digital watermark is information multiplexed in an arbitrary area of the main part of a copyrighted work (data headers, control information, etc. do not correspond to this main part data; these are hereinafter referred to as contents).
- “multiplexing of digital watermark” is realized by placing a code identifiable as a digital watermark in the content. For example, when the identification code is “ ⁇ 0010110 ⁇ ” and the content is image data, it is defined that each pixel of the image data corresponds to lbit of the identification code in order from the upper left corner.
- the digital watermark is multiplexed. You can get an image de night. Since digital watermarks have the property that it is difficult to understand the multiplexed point, in view of this property, it is called "the digital watermark is embedded in the work". In the above, each pixel of the image data was corresponded in order from the upper left corner to the identification code lb it. As described above, embedding the information for protecting the copyright in the copyrighted work makes it possible to highly conceal the information for protecting the copyright.
- copy generation information includes "copy free” indicating that copying is freely permitted, "one generat ion copy” indicating that recording of one generation copy is permitted, and further copying of the copy. “No more copy” indicates that copying is prohibited, and “never copyj” indicates that copying is not allowed.
- FIG. 1 is a diagram schematically showing how copy control using copy generation information is performed.
- the recording device is a personal computer 81, and the personal computer 81 stores the original work downloaded from the network 82.
- copy generation information is embedded as an electronic watermark
- the personal computer 81 which is a recording device, copies a copy of the work into a recording medium based on the copy generation information. Record.
- the recording medium in the figure is a recordable optical disk such as a DVD-RAM, DVD-R, DVD-RW, or the like. If the digital watermark embedded in the original work is “ ⁇ more copy” as shown by the arrow yl, recording of a copy of the work is completely prohibited, and the recordable optical disc is Do not record duplicates of things.
- the copy generation information in the copy of the work is changed from “one generat i on copyj” to “no more copy”. After rewriting, it is recorded on a recordable optical disk.
- the copy generation information set to “one generation on copyj” is embedded in the original work, it becomes possible to record the first generation copy of the work on the recording medium. The operator can record a copy of the original work on the optical disc to the extent that he / she enjoys it.
- Permitting the recording of a copy for one generation only requires the permission of the copyright holder when copying the work in a limited range, such as personally, at home, or between a few friends. This is in line with the spirit of Article 30 of the Japanese Copyright Act.
- FIG. 2 is an explanatory diagram showing how reproduction control using copy generation information is performed.
- the playback device is a consumer DVD player 83, which plays back a video recorded on a recordable optical disc on a display 84.
- the consumer DVD player 83 plays CD-ROMs. Digital works recorded on read-only discs such as DVD-ROMs are played unconditionally.
- reproducing a copy recorded on a recordable disc it is strictly determined whether or not to reproduce the copy with reference to the copy generation information.
- the copy generation information is “never copy” as shown by the arrow y5 in this figure, In this case, playback from a recordable optical disk is prohibited.
- the reason is that the legitimate recording apparatus is harmful that the copy generation information does not record a copy of the work whose copyright is set to "never copyj" on a recordable optical disc, and the copy generation information indicates "never copyj. Nevertheless, a copy is recorded as evidence that the copy has been incorrectly recorded.
- the reproducing apparatus reproduces the copy.
- an unauthorized copy machine is a device that reads data recorded on one recordable optical disc in sector units and records the data as it is on another recordable optical disc. That is, when recording on a recordable optical disc, the duplicate occupies a plurality of sectors on the optical disc, but an illegal copy machine uses a plurality of occupied sectors on the copy-source recordable optical disc. The process of reading data from the optical disk and the process of writing the read data to the corresponding sector of the recordable optical disk at the copy destination are repeated for all the sectors on the recordable optical disk (this is performed in this manner). Copy processing is called dead copy.)
- Fig. 3 is a diagram assuming a situation where a copy in which a digital watermark is embedded is dead-copied using an unauthorized copy machine. The procedure of this unauthorized copy will be described with reference to FIG.
- the personal computer 81 stores the original work downloaded from the network 82, and if the copy generation information embedded in the original work is "one generat ion copy". A copy of the original work is generated, and as shown by arrow y4, the copy generation information embedded in the copy is changed from u one generati on copy to no more copy, and then recorded. Record on possible optical disk 86.
- the person who is trying to infringe the copyright of the copyrighted work may use the recordable optical disk 86 with the copy generation information recorded as "no more copyj" as the copy source as shown by arrow y9.
- the playback is normally performed by the playback device.
- a copyrighted work whose copy generation information is set to "one generation copy” will be copied for any number of generations, and the copy generation information (Tone generatio on copy) will be copied.
- the protection of duplication rights by setting would be famously innocent.
- Dead copies made in this manner are: A process to read data from each of a plurality of occupied sectors on a recordable optical disk of a copy source to a built-in memory or a built-in hard disk of a general-purpose computer and a process of recording data read to the built-in memory or a built-in hard disk at a copy destination This is performed by repeatedly performing the process of writing to the corresponding sector of the optical disc with respect to all the sectors on the recordable optical disc.
- there is a possibility that ordinary users can easily make dead copies so it is necessary to establish a method that can effectively prevent dead copies. Disclosure of the invention
- An object of the present invention is to provide a recording apparatus, a reproducing apparatus, and a recording apparatus capable of prohibiting reproduction of a second-generation copy even if a dead copy is performed by an unauthorized copy machine and a second-generation copy is obtained. Is to provide a medium.
- the above purpose is to obtain the copy attribute by reading the digital watermark embedded in the digital work, and the acquired copy attribute allows the copy to be recorded on the recording medium for one generation only.
- Rewriting means for rewriting the acquired copy attribute to a no-more copy attribute indicating that further duplication of the copy is prohibited, and that the copy of the work is
- the recording medium on which the copy of the digital work is recorded by the recording device when the reproduction is instructed, the medium identification information given to the recording medium and the medium identification embedded in the copy as an electronic watermark. By verifying at least a part of the information, it is verified whether or not the copy is genuine.
- the copy generation information indicates that “a copy of the second generation was created by further copying a copy of no more copyj.
- the medium identification information is embedded as a digital watermark, it is extremely difficult to find out where in the copy the information is embedded, and the probability that this medium identification information is falsified is extremely low. Furthermore, even when partial bits (N bits) of the medium identification information are inserted into a copy as an electronic watermark, the medium can be reproduced only at the rate of one in 2 N powers.
- the reading means reads out the port number recorded in the burst cut area of the optical disc as medium identification information
- the recording means reads out the duplicate in which the read out lot number is embedded as an electronic watermark. May be recorded on a recording medium. Since at least the lot number is embedded as an electronic watermark in the copy recorded on the recording medium by the recording device, reproduction can be performed only on a medium having the same lot number.
- the recording device may further include a region code indicating a use area of the recording device itself, a region code assigned to a package medium on which the digital work has been recorded, and a region code indicating a provider that supplied the digital work.
- Storage means for storing at least one of the no-copy attribute and at least a part of the medium identification information, and a copy of a digital work in which a local code is embedded as an electronic watermark on a recording medium. It may be recorded. By imposing restrictions on the reproduction of the copy in accordance with the area code embedded in the copy, it is possible to prevent a recording medium on which the copy is recorded from being traded improperly.
- the recording apparatus further comprises a generating means for generating reproduction quality information that imposes a limit on the reproduction quality when reproducing the copy, wherein the recording means further comprises: a no-more-copy attribute; A copy of a digital work in which information is embedded as a digital watermark may be recorded on a recording medium.
- the reproduction device When the reproduction of the copy recorded in this way is instructed, the reproduction device performs reproduction by changing the image quality and the sound quality based on the reproduction quality information. Differentiation between a genuine digital work and its reproduction can be achieved.
- FIG. 1 is a diagram schematically showing how copy control using copy generation information is performed.
- FIG. 2 is an explanatory diagram schematically showing how reproduction control using copy generation information is performed.
- FIG. 3 is a diagram showing a state in which a copy in which a digital watermark is embedded is copied using an unauthorized copy machine.
- FIG. 4 is a diagram showing the internal configuration of the personal computer 90.
- FIG. 5 is a flowchart showing a processing procedure of recording control of the CPU 107 in the first embodiment.
- FIG. 6 is a diagram schematically showing how copy control using copy generation information is performed in the first embodiment.
- FIG. 7A is a diagram showing an example of copy generation information.
- FIG. 7B is a diagram showing a physical structure of a recordable optical disk 108.
- FIG. 7C is a diagram showing copy generation information before being rewritten by the digital watermark insertion unit 105 of the first embodiment.
- FIG. 7D is a diagram showing copy generation information after being rewritten by the digital watermark insertion unit 105 of the first embodiment.
- FIG. 8 is a diagram showing the internal configuration of the playback device according to the first embodiment.
- FIG. 9 is a flowchart showing a processing procedure of the reproduction control in the first embodiment.
- FIG. 10 is an explanatory diagram for explaining how playback control is performed by the playback device according to the first embodiment.
- FIG. 11A is a diagram showing an example of a region code.
- FIG. 11B is rewritten by the digital watermark insertion unit 105 of the second embodiment.
- FIG. 14 is a diagram illustrating previous copy generation information.
- FIG. 11C is a diagram showing copy generation information after being rewritten by the digital watermark insertion unit 105 of the second embodiment.
- FIG. 12 is a flowchart showing a recording control processing procedure of the CPU 107 in the second embodiment.
- FIG. 13 is a diagram schematically showing how copy control is performed using copy generation information in the second embodiment.
- FIG. 14 is a flowchart showing a processing procedure of reproduction control in the second embodiment.
- FIG. 15 is an explanatory diagram for explaining how the reproduction is prohibited by the reproduction device in the present embodiment.
- FIG. 16 is a diagram showing how an analog original signal is represented as digital data.
- Fig. 17 is a diagram showing the process of performing quantization using 8-bit and 9-bit quantization bits.
- FIG. 18A is a diagram showing an example of reproduction quality information on digital audio data and digital video data.
- FIG. 18B is a diagram showing copy generation information before being rewritten by the digital watermark insertion unit 105 of the third embodiment.
- FIG. 18C is a diagram showing copy generation information after being rewritten by the digital watermark insertion unit 105 of the third embodiment.
- FIG. 19 is a flowchart showing a recording control processing procedure of the CPU 107 in the third embodiment.
- FIG. 20 is a diagram schematically showing how copy control is performed using copy generation information in the third embodiment.
- FIG. 21 is a diagram showing the internal configuration of the playback device in the third embodiment.
- FIG. 22 is a diagram showing a processing procedure of reproduction control in the third embodiment.
- FIG. 23 is a diagram showing the internal configuration of the personal computer 90 in another application form (b) of the first embodiment.
- FIG. 24 is a diagram showing the internal configuration of the personal computer 90 in another application form (c) of the first embodiment.
- FIG. 4 is a diagram showing an internal configuration of a personal computer 90 as a recording device.
- the personal computer 90 includes a host computer 91 and a drive device 97, and the personal computer 90 stores the original work downloaded from the network 92. I have.
- copy generation information is embedded as an electronic watermark, and the recording device, which is a personal computer 90, performs a recording process based on the copy generation information.
- the host computer 91 includes a communication adapter 93 for communicating with the public network 92, an interface control unit 94 for performing data transmission with the drive device 97, a memory 95, and a CPU 96. .
- the memory 95 stores a download program and an original work for acquiring an original work such as video and music through the network 92 and recording the original work on the optical disk 108.
- copy generation information is embedded in the original work stored in the memory as a digital watermark.
- the host computer 91 In recording a copy of this work on a recordable optical disk 108, the host computer 91 generates a copy of the work and transmits the copy and a recording command to the drive unit 9 via an external bus. Output to 7.
- the drive device 97 is a device capable of loading a recordable optical disk 108 and writing a copy onto the recordable optical disk 108 in accordance with a recording command from the host computer 91, as shown in FIG. As shown, the signal processing unit 101 WO 00/52691 PCT / JP00 / 01 (fl3
- the work to be recorded on the recordable optical disk 108 is moving image data compressed according to the MPEG (Moving Picture Experts Group) standard, and LPCM.Dolby-AC3, MPEG-audio, This is audio data encoded by an encoding method such as MPEG-AAMP3 or the like.
- the recordable optical disk 108 on which the audio data is recorded is reproduced using a dedicated reproducing device.
- the signal processing unit 101 performs a modulation process on data to be written to the recordable optical disk 108, and adds an error correction code.
- the interface X control unit 102 controls input / output between the external bus and the signal processing unit 101. Since the host computer 91 is connected to this external bus, when the host computer 91 outputs a copy of the copyrighted work, the interface I / O control unit 102 transmits the copy via the external bus. And outputs it to the digital watermark detection unit 104.
- the optical head 103 is driven by a seek mechanism (not shown), and writes data by irradiating the optical disk 108 with laser light.
- FIG. 7A is a diagram showing an example of copy generation information.
- the copy generation information is 2-bit information. "00" is “copy free”, “0” is “u one generat i on copy”, “U” is “no more copy”, and "01” is “never copyj". Thus, it can be seen that it is indicated whether recording of a copy of a digital work is permitted or prohibited.
- the digital watermark input unit 105 records from a predetermined area on the disc 108 when only the first generation copy is permitted in the copy generation information embedded in the original work.
- the medium identification information of the medium 108 is obtained, and this is electronically transmitted to the work from the host computer 91 through the interface control unit 102.
- FIG. 7B is a diagram showing a physical structure of a recordable optical disk 108. As shown in Fig. 7B, the area on the optical disk is roughly divided into two areas, mainly consisting of a user area in which user data is recorded and a BCA (Burst Cutting Area).
- the BCA is formed by removing the reflective film on the optical disk in a stripe shape, and it is an area that cannot be read without special authority.
- 188 bytes of data including the lot number and the like are recorded in a non-tamperable state.
- the digital watermark insertion unit 105 stores the 188 bytes of data recorded in the BCA in this recording medium 1 Acquired as information unique to 08 (medium identification information).
- the electronic watermark insertion unit 105 transmits a copy of the copyrighted work transferred from the host computer 91 via the external bus via the interface control unit 102.
- the media identification information is embedded in a copy of the work as electronic watermarks.
- FIG. 7C and 7D are diagrams for comparing before and after rewriting of copy generation information by the digital watermark input unit 105.
- FIG. 7C the digital watermark insertion unit 105 rewrites the copy generation information for a copy of the digital work whose copy generation information is set to "10".
- the copy generation information set to “10” has been rewritten to “1 1” and set to “no more copy”.
- medium identification information having a value of “01 101 1001 1 100 1 1001001 1” is added to the copy generation information indicating “1 1”.
- the CPU 107 receives the command issued by the host computer 91 through the external bus and the interface control unit 102, interprets the command, and executes the command of the optical head 103. It controls the head position and rotation speed. At the time of writing a copy of the work, the copy transferred to the external bus is received via the interface control unit 102 and a write operation is performed. If the copy generation information detected by the digital watermark detection unit 104 is “copy f reej,” the CPU 107 copies the copy of the copyrighted work received via the interface control unit 102 as it is. Recordable optical disk 1 0 If the copy generation information detected by the digital watermark detection unit 104 is “no more copy” or “never copy”, writing of a copy of the copyrighted work is prohibited.
- the copy generation information is rewritten to “no more copy”, and the digital watermark insertion unit is inserted so that the medium identification information is embedded as a digital watermark in the copy of the copyrighted work. Then, a copy of the work is recorded on a recordable optical disc 108.
- step S401 if the CPU 107 obtains an original work from outside the device, the CPU 107 generates a copy of the original work in the memory 95.
- the digital watermark detection unit 104 detects copy generation information embedded as a digital watermark of the copy (note that the copy at this time is: Since it is completely the same as the original work, it is no different from detecting the copy generation information from the original work
- the memory 95 storing the original work and the digital watermark detection unit 10 4 exists in separate devices (host computer 91, drive device 97), so copy generation information was detected from a copy exactly identical to the original work, but the digital watermark was sent to the host computer 91.
- the digital watermark detection unit 104 should detect the copy generation information from the original copyrighted work stored in the memory 95 When the original work is recorded on a read-only disc and loaded into the drive unit 97, copy generation information embedded in the original work recorded on the read-only disc should be detected. Is).
- step S402 the CPU 107 branches to processing corresponding to the content of the copy generation information in the digital watermark. If the copy generation information is “copy free”, the CPU 107 records a copy of the copyrighted work on the disc 108 in step S403. Copy If the generation information is “no more copyj” or “never copyj, In the WO 00/52691 PCT / JPOO / 010f3 S408, the CPU 107 stops recording the copy on the disc 108. If the copy generation information is “one generation on copy”, the CPU 107 reads the medium identification information of the recording medium 108 from the BCA on the disk 108 in step S405.
- the host computer 91 issues a special command (a command that cannot be used by a general user) to the drive unit 97, and the CPU 107 of the drive unit 97 performs special read processing according to the special command.
- a special command a command that cannot be used by a general user
- the CPU 107 of the drive unit 97 performs special read processing according to the special command.
- step S406 the CPU 107 performs electronic transparency so as to avoid rewriting the copy generation information embedded in the copy into the "one generat i on copy" power, or u no more copyj.
- the read medium identification information is passed to the digital watermark insertion unit 105, and the medium identification information of the recording medium 108 obtained from the BCA is embedded in the copy as a digital watermark. Let it.
- step S407 the CPU 107 executes recording on the disk 108.
- FIG. 6 is a diagram schematically showing how copy control using copy generation information is performed.
- the copy control using the copy generation information will be described with reference to FIG.
- the digital watermark embedded in the copy is “one generat i on copyj” as shown by the arrow y24, this digital watermark is detected and rewritten to “no more copyj” and read from the BCA.
- the medium identification information is embedded in the duplicate again as a digital watermark and recorded on the optical disk.
- This playback device is a copy It reproduces a copy in which the medium identification information is embedded together with the substitute information as a digital watermark, and has the internal configuration shown in FIG.
- FIG. 8 is a diagram showing a block configuration diagram of the playback device in the first embodiment.
- the playback device is composed of an optical head 203, a signal processing unit 204, an electronic watermark detection unit 205, a decoding unit 206, and a CPU 201.
- the optical disc loaded in the reproducing apparatus as the optical disc 202 in the reproducing apparatus includes a read-only optical disc and a recordable optical disc 108.
- the signal processing unit 204 demodulates a signal read from the optical disc 202 via the optical head 203 and performs error correction and the like.
- the digital watermark detection unit 205 determines the medium identification information embedded as a digital watermark from this copy and the copy generation information. To detect.
- the decoding unit 206 decodes the duplicate read from the optical disc 202 and outputs it as a video signal and an audio signal to an externally connected display device and speaker device.
- the CPU 201 controls the head position and the rotation speed of the optical head 203 to read data from the optical disc 202.
- an error correction process and a demodulation process are performed by the signal processing unit 204 and the digital watermark detection unit 205 detects a digital watermark from the duplicate read from the optical disk 202, the CPU 201 Performs playback control based on the digital watermark.
- step S701 of FIG. 9 the CPU 201 obtains information on the disk type of the optical disk 202 loaded in the playback device. If the disc type is a read-only disc, the original copyrighted work is recorded on the disc, so the process proceeds to step S710 and the CPU 201 records on the read-only disc. Original work To play. If the disc type is a recordable disc, it is suspected that two generations of illegally recorded duplicates are recorded on the optical disc 202.
- step S703 the CPU 201 sends to the digital watermark detection unit 205 the copy generation information embedded as the digital watermark in the data read from the optical disc 202. And the medium identification information of the optical disk 202 are detected. After the detection, in step S704, the CPU 201 determines the contents of the copy generation information. If the copy generation information is “copy free”, it is considered that there is no need to verify whether the copy right recorded on the optical disc 202 infringes the copy right. The CPU 201 executes reproduction from the optical disk 202.
- the copy generation information is “one generation on copy”, the duplication right is suspected to have been infringed. This is because, when a copy of "one generati on copyj" is recorded on optical disc 202, copy generation information is usually rewritten to "no more copyj", and there is no evidence of such rewriting. The fact that the copy is recorded on the optical disk 202 as on copyj is evidence that the copy is recorded improperly. Therefore, if the copy generation information embedded in the copy recorded on the optical disc 202 is “one generation on copy”, the process proceeds to step S706, and the CPU 201 executes the reproduction. Ban.
- the copy generation information is "never copyj," it is suspected that the copy right has been infringed. This is because the legitimate recording device is harmful to not record a copy whose copy generation information is set to “never copyj” on the optical disc 202, and copies the copy generation information to “never copyj while the copy is set to“ never copyj ”. Recorded in 2 is evidence that the copy has been incorrectly recorded. In this case, the process proceeds to step S706, and the CPU 201 prohibits the reproduction.
- the optical disk 202 can be considered as a recording medium on which a copy is properly recorded by a recording device.
- a quick decision is dangerous and this copy is suspected to have been copied illegally.
- the copy generation information is "one" using an illegal copy machine.
- the optical disc 202 records an illegal second-generation copy. This is because the copy generation information is set to "no more copyj" in the second generation copy.
- the medium identification information read from the optical disk 202 is compared with the medium identification information embedded in the copy, it is determined whether the optical disk 202 has recorded a valid copy or an unauthorized copy. It can be determined whether the copy of the second generation is recorded. At this time, even if all of the medium identification information partially matches the medium identification information given to the optical disc 202, the first generation copy is properly recorded by the recording device. May be determined.
- FIG. 10 is an explanatory diagram for explaining the prohibition of reproduction by the reproduction device in the present embodiment.
- a recordable optical disk 71 is a recording medium on which a copy is legally recorded by a recording device
- a recordable optical disk 72 is an illegal copy machine using the recordable optical disk 71 as a copy unit. This is an illegal second-generation copy obtained by using.
- the copy generation information is set to "no more copyj", and the medium identification information in the BCA and the medium identification information embedded as an electronic watermark match. I have. Therefore, the copy recorded on the recordable optical disk 71 is reproduced as usual as shown by the arrow y31.
- the copy recorded on the recordable optical disk 72 has the copy generation information set to “no more copy” as shown in the frame w2, and the medium identification information in BCA and the digital watermark. Since the embedded media identification information does not match, reproduction is prohibited as shown by arrow y32.
- a digital work consists of multiple bitplanes
- 8 ⁇ 8 pixels in each bit plane of the still image data are set as a block, and a block satisfying a predetermined complexity criterion is detected from a plurality of blocks constituting the bit plane.
- the pixel value of the block is rewritten based on the information to be embedded as a digital watermark in the block. This pixel value rewriting is performed by the following processing.
- each block composed of 8 x 8 pixels corresponds to lbit of information to be embedded as a digital watermark, such as copy generation information, in order from the upper left corner, and the pixel value of each pixel corresponds to the digital watermark. If the information matches the information to be embedded, the original pixel value is used. If not, the new pixel value is used.
- the above rewriting process is repeated for all bits of information to be embedded as a digital watermark. After the rewriting is completed, if a map file indicating the block whose pixel value has been rewritten is attached to the still image data, the still image data in which the information to be embedded as a digital watermark is embedded as an electronic watermark can be obtained. Obtainable.
- the copyrighted work is audio data consisting of multiple audio frames (the encoding method may be any encoding method such as LPCM, Do-by-AC3, MPEG-audio, MPEG-AAC, MP3, etc.)
- the audio frames that make up the audio data that is the copyrighted work are treated as blocks, and a block that satisfies a predetermined complexity criterion is detected from the blocks. If a block that satisfies the predetermined complexity criterion is detected, the block is rewritten with the same block pixel values as in the case of still image data, and the audio frame for which the pixel value is rewritten Sound map file showing Attach to voice data.
- medium identification information that can identify individual optical disks is embedded as an electronic watermark at the time of recording, and medium identification information embedded as an electronic watermark is detected at the time of reproduction. Since the collation is performed with the medium identification information in the BCA of the optical disc and the reproduction control is performed according to the collation result, it is possible to prohibit the reproduction of the duplicate obtained by the illegal dead copy.
- the identification information of the optical disc embedded in the copy as a digital watermark uses a different ID for each optical disc.
- the identification information of the optical disk to be inserted may be information indicating the type of the optical disk such as DVD-RAM, DVD-R, DVD-RW or the like, or a slot number at the time of manufacturing the optical disk.
- the present embodiment is an embodiment for preventing a copy recorded on a recording medium by a recording device from being illegally traded. That is, a copy whose copy generation information is set to “copy free” or “one generat ion copy” is intended for personal use, and the recording device records the copy on a recording medium. It is harm that is used only in the affected areas. If the recording medium is used outside of the area where the recording device recorded the copy on the recording medium, the recording medium was illegally traded beyond personal use. there is a possibility.
- a region code indicating an area where the copy is properly used is embedded in the copy as a digital watermark, and when the playback device is instructed to reproduce the copy, the region code of the playback device is designated. And the regional code embedded as a digital watermark is checked, and if they do not match, the reproduction should be prohibited.
- a region code it is conceivable to use a region code indicating a country where the recording device itself is exported / imported and a region where the recording device is sold.
- FIG. 11A is a diagram showing an example of a region code.
- the region code is assigned a 3-bit value, and indicates the use region of the recording device itself, such as 000 for North America, 001 for Japan, Europe, 010 for South Asia, 01 1 for Latin America, etc. .
- the area code indicating the area where the recording device itself is used
- a regional code or the like indicating the provider (broadcasting station) that broadcasts the original copyrighted work by digital satellite broadcasting may be used.
- the CPU 107 shown in FIG. 4 performs recording control in accordance with the processing target procedure shown in the flowchart of FIG. This is realized by performing Hereinafter, the recording control of the CPU 107 in the second embodiment will be described with reference to FIG.
- step S501 of FIG. 12 when the original work is received, the CPU 107 generates a copy of the original work, and sends a digital watermark to the digital watermark detection unit 104 in the copy. Is detected as copy generation information embedded as ".”
- step S502 the CPU 107 branches to processing corresponding to the content of the copy generation information in the digital watermark. That is, if the copy generation information is set to “no more copy” or “never copy”, the CPU 107 stops recording to the optical disk 108 in step S503.
- step S504 the CPU 107 sets the area embedded in the electronic circuit of the drive unit 97. Get the code.
- step S505 the CPU 107 causes the digital watermark input unit 105 to embed a digital watermark for the region code of the drive device 97 in the generated copy, and in step S506, the CPU Numeral 107 executes recording on the optical disk 108.
- the medium identification information is read from the BCA on the optical disk 108 in addition to the embedding of the area code.
- the medium identification information is transferred to the digital watermark insertion unit 105, and the processing of embedding the medium identification information of the recording medium obtained from the BCA as a digital watermark in the copy is performed. The description is omitted because it is the same as that shown in the embodiment.
- FIGS. 11B and 11C are diagrams showing before and after rewriting of copy generation information by the digital watermark insertion unit 105 in comparison.
- copy generation information WO 00/52691 It is assumed that the digital watermark insertion unit 105 has rewritten copy generation information for a copy in which PCT / JPOO / 010r3 is set to “10”. In this case, the copy generation information set to “10” is rewritten to “1 1” indicating “no more copyj” and “01 101 1001 1 100
- the addition of the medium identification information having a value of “1 10010011 1” is similar to FIGS. 7C and 7D of the first embodiment. In this figure, it can be seen that in addition to this, an area code of “001” is added. This area code of “001” indicates that this copy was recorded on an optical disk by a recording device installed in Japan.
- FIG. 13 is a diagram schematically showing how copy control is performed using copy generation information in the second embodiment.
- This drawing is based on Fig. 6 and has many common features, so only the differences from Fig. 6 will be explained.
- the digital watermark embedded in the copy is ⁇ one generat i on copyj '' as shown by the arrow y24, this digital watermark was detected and rewritten to ⁇ no more copyj '' and read from the BCA.
- the embedding of the medium identification information as a digital watermark in the copy again is the same as in FIG. 6 of the first embodiment.
- the difference from FIG. 6 is that the area code indicating the area of use of the recording device itself is embedded as an electronic watermark in the copy and recorded on the optical disc.
- the digital watermark is “copy free” as shown by arrow y23, the area code indicating the use area of the recording device itself is embedded in the copy as a digital watermark and recorded on the optical disc.
- playback control when playing back a copy in which a new area code is embedded as a digital watermark is performed by the CPU 201 shown in FIG. 8 according to the processing procedure shown in the flowchart of FIG. It is realized by doing.
- the processing procedure of the reproduction control in the second embodiment will be described with reference to FIG.
- step S8001 in FIG. 14 the CPU 201 sends the local code and the copy generation to the digital watermark detection unit 205 from the digital watermark embedded in the copy read from the optical disk 202. Instruct to detect information.
- step S802 the CPU 201 obtains the area code detected from within the digital watermark and the CPU 201. And compares it with the region code of the playback device. If they do not match, in step S808, the CPU 201 suspends reproduction of the copy from the optical disk 202. If they match, the CPU 201 shifts to the processing from step S804.
- step S804 information of the disk type determined by the CPU 201 is obtained. If the disc type is a reproduction-only disc, the process proceeds to step S809, and the CPU 201 executes reproduction from the optical disc 202. If the disc type is a recordable disc, the process proceeds to step S806, where the CPU 201 copies the copy generation as an electronic watermark embedded in the copy read from the optical disc 202. Detect information. Next, in step S807, the CPU 201 decodes the copy generation information in the digital watermark, and branches to processing corresponding to these contents. If the copy generation information is set to “one generation on copy” or “never copy”, the CPU 201 stops the reproduction from the optical disk 202 in step S808.
- the copy generation information is set to "copy free” or "no more copy"
- the medium identification information is collated as in the first embodiment, and if the medium identification information matches, the process proceeds to step S8.
- the CPU 201 executes reproduction from the disk 202.
- FIG. 15 is an explanatory diagram for explaining the prohibition of reproduction by the reproduction device in the present embodiment. This drawing is based on FIG. 10 and has many common features, so only the differences will be described.
- the recordable optical disk 71 is a recording medium on which the recording device has duly recorded a duplicate, and the recordable optical disk 72 has the duplicatively recorded copy, similarly to the recordable optical disk 71. Although it is a recording medium, it is an illegally distributed product distributed through an illegal distribution channel.
- the copy generation information is set to "no more copyj"
- the medium identification information in the BCA and The medium identification information embedded as an electronic watermark in the copy is the same as that in Fig. 10, but in addition to this, the area code indicating the use area of the playback device itself and the recording The area code indicating the use area of the device itself matches. Since the medium identification information and the area code match, the copy recorded on the recordable optical disk 71 is considered to be authentic and is reproduced by the reproducing device.
- the copy generation information is set to "no more copy", and the medium identification information in the BCA and the medium identification information embedded as a digital watermark are compared.
- This is the same as the recordable optical disk 71, but since it passed through an unauthorized distribution channel, the area code indicating the area of use of the playback device itself and the area indicating the area of use of the recording device itself Code does not match. Since the region codes do not match, the copy recorded on the recordable optical disk 72 is considered to be illegally distributed and is not reproduced by the reproducing device.
- by detecting the area code as a digital watermark it is possible to prevent a copy recorded on the recording medium by the recording device from being illegally traded.
- the third embodiment is an embodiment in which, when a copy of a digital work is recorded on a recording medium, reproduction quality information is embedded in the copy and the image quality and the sound quality at the time of reproduction of the copy are restricted.
- the reproduction quality of the copy is limited by specifying the sampling frequency and the number of quantization bits.
- FIG. 16 is a diagram showing how an analog original signal is represented as digital data.
- the “sampling frequency” is a frequency indicating constant intervals kl, k2, and k3 for sampling digital values when decoding digital data into analog data.
- the signal spectrum with the maximum frequency B (Hz) or less is obtained.
- the analog value can be decrypted. This is because, in the sampling theorem, if the maximum frequency of a signal spectrum of analog data is B (Hz), the signal can be restored by sampling performed at a speed of 2 XB times / sec or more. is there.
- the sampling frequency is increased, the maximum frequency of the signal spectrum of the analog data to be decoded is increased, and if the sampling frequency is reduced, the signal spectrum of the analog data to be decoded is increased.
- the highest frequency of the tor becomes lower
- the “quantization bit number” is the number of bits that determines the shortness of the quantization step interval j l. J 2. j 3. j 4 shown on the amplitude axis in FIG. In FIG. 16, the amplitude of the digital value is divided by the quantization step interval indicated by the number of quantization bits, and is approximated to the quantization level closest to each sampling point.
- FIG. 17 is a diagram showing a process in which quantization is performed by rounding off using a quantization bit number of 8 bits and 9 bits.
- the analog value on the left side of FIG. 17 is expressed as "3" when the number of quantization bits is 8 bits. Referring to the right side of the figure, it can be seen that the analog value is expressed as "7" when the quantization bit number is 9 bits. Furthermore, comparing the maximum quantization error dl when the number of quantization bits is 8 bits and the maximum quantization error d2 when the number of quantization bits is 9 bits, the quantization error d2 is dl It can be seen that it is halved compared to
- the maximum quantization error is halved, indicating that if the quantization bit is changed, the precision of the analog data to be restored changes.
- FIG. 4 is a diagram illustrating an example of reproduction quality information on data and digital video data.
- the reproduction quality information for digital audio data is composed of sampling frequency information and quantization bit number information.
- the sampling frequency information specifies the value from 001 to 110, and instructs the playback device to play at any of the sampling frequencies of “48kHz, 96kHz, 192kHz, 44.1kHz, 88.2kHz, 176.4kHz”. It is.
- the reproduction device By specifying the value of 001 to 011 for the quantization bit number information, the reproduction device is instructed to perform reproduction with any of the quantization bit numbers of “16 bits, 20 bits, and 24 bits”. Information.
- the internal configuration of the recording device in this embodiment is the same as that shown in the first embodiment, and the restriction on the reproduction quality using the reproduction quality information as described above is shown in the flowchart of FIG. This is realized by performing recording control according to the processing procedure.
- the recording control in the third embodiment will be described with reference to the flowchart of FIG.
- steps S601 to S603 are the same as steps S501 to S503 in FIG.
- step S604 after identifying the data type of the copy, the reproduction quality when reproducing the copy is determined based on a predetermined criterion.
- step S605 the CPU 107 causes the digital watermark insertion unit 105 to embed the determined reproduction quality information as an electronic watermark, and in step S606, the CPU 107 executes recording on the optical disc 108.
- FIGS. 18B and 18C are diagrams showing before and after rewriting of copy generation information by the digital watermark insertion unit 105 in comparison. As shown in FIG. 18B, it is assumed that the digital watermark input unit 105 has rewritten the copy generation information for a copy of the digital work in which the copy generation information is set to “10”. In this case, the copy generation information set to “10” is rewritten to “11” indicating “no more copy”,
- Medium identification information with a value of “0110110011100 110010011” is added. (This is the same as FIGS. 7C and 7D of the first embodiment.) In this figure, in addition to this, it can be seen that a sampling frequency having a value of “010” and quantization bit number information having a value of “01” are added. A value of “010” indicates that this digital copy should be reproduced at a sampling frequency of 96 kHz, and a value of “01” indicates that it should be decoded with a 16-bit quantization bit.
- FIG. 20 is a diagram schematically showing how copy control is performed using copy generation information in the third embodiment. This drawing is based on Fig. 6 and has many common features, so only the differences will be described.
- the digital watermark embedded in the copy is ⁇ one generat i on copyj '' as shown by the arrow y24, this digital watermark was detected and rewritten to ⁇ no more copyj '' and read from the BCA. Embed the media identification information as a digital watermark in the copy again.
- This is the same as FIG. 6 of the first embodiment, except that the reproduction quality information when reproducing the duplicate is embedded in the duplicate as an electronic watermark and recorded on the optical disc. It is different from the figure.
- the digital watermark is “copy freej” as shown by the arrow y23, the reproduction quality information when reproducing the duplicate is embedded in the duplicate as an electronic watermark and recorded on the optical disc. different.
- the internal configuration of the playback device in the present embodiment is as shown in FIG.
- the same components as those shown in FIG. 8 are denoted by the same reference numerals, and newly added components (quality control unit 207) are denoted by new reference numerals. are doing.
- the quality control unit 207 newly provided in FIG. 21 will be described.
- the quality control unit 207 determines the copy frequency using the sampling frequency information and the quantization bit number information indicated in the playback quality information.
- the decoding unit 206 is controlled so as to perform reproduction. For example, when the reproduction is digital audio data quantized at a sampling frequency of 176.4 kHz, and reproduction quality information indicating a sampling frequency of 96 kHz is embedded in the digital audio data as an electronic watermark with "010" , Quality control section 207, 176.4 kHz Of the digital audio data quantized at the sampling frequency of 96 kHz, the audio component exceeding the sampling frequency of 96 kHz is cut, and the decoding unit 206 is configured to decode and output the audio component of the sampling frequency of 96 kHz or less. Control.
- the duplicate is digital audio data that has been quantized with a 24-bit quantization bit number, and playback quality information indicating the 16-bit quantization bit number is embedded in the digital audio data as a digital watermark with “01”. It is assumed that In this case, the quality control unit 207 decodes the lower 16-bit audio components of the digital audio data quantized with the 24-bit quantization bit number, and emphasizes the upper 8-bit audio components. Control the part 206.
- the function of the quality control unit 207 is as described above, the restriction of the reproduction quality using the reproduction quality information as described above is performed by performing the reproduction control according to the processing procedure shown in the flowchart of FIG. Is realized by:
- the reproduction control in the third embodiment will be described with reference to the flowchart in FIG.
- steps S1001, S1003, and S1004 are the same as the processes of steps S701, S703, and S710 of FIG. If it is determined in step S1001 that the optical disk 202 is a read-only disk, the process proceeds to step S1002, where the CPU 201 executes the reproduction. In step S1004, the CPU 201 makes a determination based on the copy first generation information in the digital watermark. If the result is "one generation copy” or "nevercopy", the CPU 201 re-executes the process from the optical disc 202 in step S1005. Cancel life.
- step S 1007 the CPU 201 controls the quality control unit 207 to control the reproduction quality based on the reproduction quality information in the digital watermark. Let it start. Thereafter, the flow shifts to step S1002 to execute reproduction.
- the reproduction apparatus performs reproduction by changing the image quality and sound quality based on the reproduction quality information, thereby differentiating a genuine digital work and its reproduction. be able to.
- the first to third embodiments described above are merely described as examples of systems in which the best effects can be expected at present.
- the present invention can be implemented and changed without departing from the gist thereof. Specifically, the following changes (a), (b), (c), (d), and (e) can be implemented.
- FIG. 23 is a diagram showing another applied form of the first embodiment. This figure differs from the personal computer 90 in FIG. 4 in that the recordable optical disk 108 and the signal processing unit 101 are rewritten to the flash memory card 110 and the power connector 111, respectively. That is the point.
- the flash memory card 110 has a “special area”, an “authentication area”, and a “user area”.
- the “user area” includes various types of devices connected to the flash memory card 110. It is an area where the evening can be freely written and data can be freely read, and its internal area is managed by the file system.
- the “special area” is an area in which medium identification information having a unique value for each of the flash memory cards 110 is stored. While the user area is writable, the special area is read-only and the medium identification information stored here cannot be rewritten.
- the “authentication area” is an area in which data can be written similarly to the user area. The difference from the user area is that in the user area, data can be read and written freely, while in the authentication area, the device connected to the flash memory card 110 and the flash memory card 110 Should read and write only if they confirm each other's legitimacy. In other words, it is possible to read and write only when mutual authentication between the device connected to the flash memory card 110 and the flash memory card 110 is successful.
- FIG. 24 is a diagram showing the internal configuration of the personal computer 90 in another applied form.
- the down-loading program in the communication adapter 93 and the memory 95 for acquiring the digital work from the network is removed from the host computer 91.
- the source of the digital work in the memory 95 is as follows.
- the read-only optical disk 112 is loaded into the drive unit 97, it is recorded on the read-only optical disk 112. Is read out and stored in the memory 95.
- copy generation information is embedded as a digital watermark in the digital work recorded on the read-only optical disk 112 in this manner.
- the host computer 91 performs the same processing as in the first embodiment.
- Even a digital work recorded on a read-only disc, that is, a digital work as package software is recorded on the recordable optical disc 108.
- a filtering parameter may be provided in the reproduction quality information. Since the "filtering parameters" includes the number of scanning lines or the number of pixels, when digital video data is reproduced, interpolation can be performed in units of the number of scanning lines or the number of pixels included in the reproduction quality information. be able to. When the digital work is digital video data, the quality of the reproduced image is limited by such interpolation, so that the reproduction quality can be controlled.
- the product S control unit 207 is provided at the preceding stage of the decoding unit 206, but it may be configured to be included inside the decoding unit 206.
- the copy attribute of each copy may be stored in management information provided for each copy.
- the present invention is useful for manufacturing a recording device capable of private copying and a reproducing device for reproducing a copy obtained by private copying. May be used in
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Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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KR1020017010891A KR20010103027A (ko) | 1999-02-26 | 2000-02-23 | 저작물에 전자워터마크로서 매립되어 있는 복제속성에기초하여, 저작물의 복제물을 기록매체에 기록하는기록장치, 기록된 복제물의 재생을 행하는 재생장치,기록매체, 기록방법 및 재생방법 |
US09/914,129 US6937553B1 (en) | 1999-02-26 | 2000-02-23 | Recorder for recording copy of production on the basis of copy attribute embedded as electronic watermark in the production, reproducing device for reproducing recorded copy, recorded medium, recording method, and reproducing method |
AU26895/00A AU2689500A (en) | 1999-02-26 | 2000-02-23 | Recorder for recording copy of production on the basis of copy attribute embedded as electronic watermark in the production, reproducing device for reproducing recorded copy, recorded medium, recording method, and reproducing method |
DE60017877T DE60017877T2 (de) | 1999-02-26 | 2000-02-23 | Rekorder zur aufzeichnung von produktionskopien auf basis eines kopierattributes das eingebettet ist als elektronisches wasserzeichen in der produktion, wiedergabevorrichtung zur wiedergabe von aufgezeichneten kopien, aufgezeichnungsmedium, aufzeichungsverfahren und wiedergabeverfahren. |
EP00905275A EP1158514B1 (en) | 1999-02-26 | 2000-02-23 | Recorder for recording copy of production on the basis of copy attribute embedded as electronic watermark in the production, reproducing device for reproducing recorded copy, recorded medium, recording method, and reproducing method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP11/50892 | 1999-02-26 | ||
JP11050892A JP2000251395A (ja) | 1999-02-26 | 1999-02-26 | 記録媒体、記録装置及び再生装置 |
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WO2000052691A1 true WO2000052691A1 (fr) | 2000-09-08 |
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PCT/JP2000/001013 WO2000052691A1 (fr) | 1999-02-26 | 2000-02-23 | Enregistreur permettant d'enregistrer des copies de production sur la base d'un attribut de copie incruste sour forme de filigrane dans la production, appareil de reproduction capable de reproduire la copie enregistree, support enregistre, procede d'enregistrement et procede de reproduction |
Country Status (8)
Country | Link |
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US (1) | US6937553B1 (ja) |
EP (1) | EP1158514B1 (ja) |
JP (1) | JP2000251395A (ja) |
KR (1) | KR20010103027A (ja) |
CN (1) | CN1188857C (ja) |
AU (1) | AU2689500A (ja) |
DE (1) | DE60017877T2 (ja) |
WO (1) | WO2000052691A1 (ja) |
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WO2023272729A1 (zh) * | 2021-07-02 | 2023-01-05 | 叶立三 | 著作物流通资源生成与分享方法、装置、设备和平台 |
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- 2000-02-23 AU AU26895/00A patent/AU2689500A/en not_active Abandoned
- 2000-02-23 DE DE60017877T patent/DE60017877T2/de not_active Expired - Fee Related
- 2000-02-23 US US09/914,129 patent/US6937553B1/en not_active Expired - Fee Related
- 2000-02-23 EP EP00905275A patent/EP1158514B1/en not_active Expired - Lifetime
- 2000-02-23 CN CNB008067538A patent/CN1188857C/zh not_active Expired - Fee Related
- 2000-02-23 KR KR1020017010891A patent/KR20010103027A/ko active IP Right Grant
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AU2001294203B2 (en) * | 2000-10-06 | 2007-12-20 | Pioneer Corporation | Information recording/reproducing apparatus and method, recording medium and information recording medium with recording/reproducing control program |
AU2001294203B9 (en) * | 2000-10-06 | 2008-05-29 | Pioneer Corporation | Information recording/reproducing apparatus and method, recording medium and information recording medium with recording/reproducing control program |
US7394739B2 (en) * | 2000-10-06 | 2008-07-01 | Pioneer Corporation | Method and apparatus for recording/reproducing type information onto/from a plurality of locations on a recording medium, and recording medium having type information recorded thereon at a plurality of locations |
AU2001294203C1 (en) * | 2000-10-06 | 2008-08-28 | Pioneer Corporation | Information recording/reproducing apparatus and method, recording medium and information recording medium with recording/reproducing control program |
US7885158B2 (en) * | 2000-10-06 | 2011-02-08 | Pioneer Corporation | Information recording apparatus, recording medium, and information recording method for recording information including characteristic information in correspondence to medium type information |
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US7454627B2 (en) | 2001-03-08 | 2008-11-18 | Samsung Electronics Co., Ltd. | Recording medium containing copyright information, recording apparatus and recording method therefor |
JP2012069240A (ja) * | 2005-09-21 | 2012-04-05 | Rovi Europe Ltd | コンピュータ可読媒体上のデータへのアクセスをモニタリングし制御する機器および方法 |
Also Published As
Publication number | Publication date |
---|---|
JP2000251395A (ja) | 2000-09-14 |
DE60017877D1 (de) | 2005-03-10 |
EP1158514A1 (en) | 2001-11-28 |
CN1188857C (zh) | 2005-02-09 |
EP1158514A4 (en) | 2002-09-25 |
CN1348592A (zh) | 2002-05-08 |
AU2689500A (en) | 2000-09-21 |
US6937553B1 (en) | 2005-08-30 |
EP1158514B1 (en) | 2005-02-02 |
DE60017877T2 (de) | 2005-06-30 |
KR20010103027A (ko) | 2001-11-17 |
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