WO2003054882A1 - Support, procede et appareil d'enregistrement de donnees, et procede et appareil de reproduction de donnees - Google Patents
Support, procede et appareil d'enregistrement de donnees, et procede et appareil de reproduction de donnees Download PDFInfo
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- WO2003054882A1 WO2003054882A1 PCT/JP2002/013301 JP0213301W WO03054882A1 WO 2003054882 A1 WO2003054882 A1 WO 2003054882A1 JP 0213301 W JP0213301 W JP 0213301W WO 03054882 A1 WO03054882 A1 WO 03054882A1
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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
- G11B20/10—Digital recording or reproducing
- G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
- G11B20/1833—Error detection or correction; Testing, e.g. of drop-outs by adding special lists or symbols to the coded information
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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
- G11B20/10—Digital recording or reproducing
-
- 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
- G11B20/0021—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
- G11B20/00217—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 the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source
- G11B20/00253—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 the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source wherein the key is stored on the 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
- G11B20/0021—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
- G11B20/00217—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 the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source
- G11B20/00253—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 the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source wherein the key is stored on the record carrier
- G11B20/00282—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 the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source wherein the key is stored on the record carrier the key being stored in the content area, e.g. program area, data area or user area
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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
- G11B20/0021—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
- G11B20/00217—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 the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source
- G11B20/00253—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 the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source wherein the key is stored on the record carrier
- G11B20/00369—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 the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source wherein the key is stored on the record carrier wherein a first key, which is usually stored on a hidden channel, e.g. in the lead-in of a BD-R, unlocks a key locker containing a second
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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
- G11B20/00572—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which change the format of the recording medium
- G11B20/00579—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which change the format of the recording medium said format change concerning the data encoding, e.g., modulation schemes violating run-length constraints, causing excessive DC content, or involving uncommon codewords or sync patterns
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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
- G11B20/00731—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction
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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
- G11B20/10—Digital recording or reproducing
- G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
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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
- G11B20/10—Digital recording or reproducing
- G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
- H03M13/29—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes combining two or more codes or code structures, e.g. product codes, generalised product codes, concatenated codes, inner and outer codes
- H03M13/2906—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes combining two or more codes or code structures, e.g. product codes, generalised product codes, concatenated codes, inner and outer codes using block codes
- H03M13/2921—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes combining two or more codes or code structures, e.g. product codes, generalised product codes, concatenated codes, inner and outer codes using block codes wherein error correction coding involves a diagonal direction
- H03M13/2924—Cross interleaved Reed-Solomon codes [CIRC]
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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
Definitions
- the present invention relates to a data recording medium for encrypting and recording content data, a recording method and an apparatus for recording data on such a data recording medium, and a method for reproducing such a data recording medium.
- the present invention relates to a method and apparatus for reproducing data. Background art
- CD Compact Disc
- ROM Compact Disc Read Only Memory
- CD-DA Compact Disc Digital Audio
- CD-ROM discs CD-R discs
- CD-RW discs and other optical discs conforming to the CD standard form the core of data recording media.
- content data such as MP3 (MPEG1 Audio Layer-3) and audio data compressed with ATRAC (Adaptive TRansform Acoustic Coding) 3 have been transferred to CD-R discs, CD-RW discs, etc. It is being recorded in
- One of the methods for protecting the content data recorded on such an optical disc is to encrypt the content data recorded on the disc.
- DRM Digital Rights Management
- a place that cannot be easily accessed by a normal player or drive may be, for example, a lead-in area or a lead-fit area of a disc.
- CD-R and CD-RW drives have a disc copy function. With such a drive, you can copy the exact data from one disk to another. If such a function is used, the key data recorded in the program area may be copied as it is.
- an object of the present invention is to provide a data recording medium, a data recording method and an apparatus, and a data reproducing method and an apparatus capable of protecting the copyright of contents by preventing duplication by disk copying. To do so. Disclosure of the invention
- the present invention provides at least one data error-corrected by the first error correction code and a second error correction code that can be decoded by the first error correction code and is different from the first error correction code.
- the present invention relates to a recording medium on which at least data in a form decodable by a code is recorded.
- the present invention relates to a data encoded by an error correction code using a first error correction code, and a second error correction code.
- Error-correction encoded data A recording medium on which at least data that can be decoded by the first error correction code and can be decoded by the second error correction code is recorded.
- the present invention relates to a recording medium, comprising: at least one data error-corrected and encoded by a first error correction code; and a decoder capable of decoding by a first error correction code and a first error correction code.
- This is a recording method for a recording medium that records at least data in a form that can be decoded by a second error correction code different from a code.
- an encoding processing unit that performs an encoding process including an error correction encoding process on input data using a first error correction code, and output data from the encoding processing unit are supplied, and the recording is performed on a recording medium.
- a recording unit that generates data that can be decoded by the first error correction code and can be decoded by the second error correction code that is different from the first error correction code, and supplies the data to the encoding processing unit.
- a generating unit for performing the recording is
- the present invention provides at least one data error-corrected by the first error correction code and a second error correction code that can be decoded by the first error correction code and is different from the first error correction code.
- a head for reading data from a recording medium on which at least data in a form that can be decoded by a code is recorded; and an error correction decoding process for the output signal from the head using a first error correction code.
- a playback device for a recording medium comprising: a decoding processing unit that performs a decoding process including a decoding process; .
- At least one data error-corrected by the first error correction code can be decoded by the first error correction code.
- data read from a recording medium on which at least data in a form that can be decoded by a second error correction code different from the first error correction code is recorded.
- FIG. 1 is a plan view used to explain an optical disk to which the present invention is applied
- FIG. 2 is a schematic diagram used to explain an optical disk to which the present invention is applied
- FIG. 3 is a diagram to which the present invention is applied.
- FIG. 4A, FIG. 4B, and FIG. 4C are schematic diagrams used to describe an optical disk to which the present invention is applied
- FIG. FIG. 6 is a schematic diagram used for explaining a recording format of an optical disc to which the present invention is applied
- FIG. 6 is a schematic diagram used for explaining a recording format of an optical disc to which the present invention is applied
- FIG. 8 is a schematic diagram used for explaining a recording format of an optical disk to which the present invention is applied.
- FIG. 1 is a plan view used to explain an optical disk to which the present invention is applied
- FIG. 2 is a schematic diagram used to explain an optical disk to which the present invention is applied
- FIG. 3 is a diagram to which the present invention is applied.
- FIG. 8 is a schematic diagram used for explaining a recording format of an optical disk to which the present invention is applied. Is the optical data to which the present invention is applied.
- FIG. 10 is a schematic diagram used for explaining a recording format of a disk
- FIG. 10 is a schematic diagram used for explaining a recording format of an optical disk to which the present invention is applied
- FIG. Fig. 12 is a schematic diagram used to explain the interleave in the case of CIRC 7 system
- Fig. 13 is a schematic diagram used to explain the interleave in the case of CIRC 4 system.
- FIGS. 14A and 14B are schematic diagrams used to describe data that can be decoded even by the CIRC 7 system.
- FIG. 14A and 14B are block diagrams of an example of an optical disc recording apparatus to which the present invention is applied.
- Fig. 15 A and 15 FIG. B is a block diagram of an example of an optical disk reproducing apparatus to which the present invention is applied, and
- FIG. 16 is a schematic diagram of another example of an optical disk to which the present invention is applied.
- a novel optical disk is used as a recording medium.
- the optical disc according to the present invention has almost the same physical specifications as the CD disc in terms of size and the like, and is capable of optically reading information on the disc with a current disc drive.
- Encrypted content data is recorded on the optical disc according to the present invention.
- the encrypted content data is, for example, encrypted content data such as audio and images in CD-ROM format or CD-DA format.
- DESS Data Encryption Standard
- the content data can be transferred to ATRAC 3 (Adaptive TRansform).
- FIG. 1 and FIG. 2 show the configuration of an optical disk to which the present invention is applied.
- the optical disc 1 to which the present invention is applied has a diameter of 120 mm and has a hole 2 at the center thereof.
- the optical disc 1 includes a read-only disc, a write-once disc, and a re-recordable disc.
- the read-only optical disc 1 aluminum is used as a member for forming a recording layer.
- data is recorded as physical pits.
- a disk substrate is formed using a stamper, and a recording layer is formed on the formed substrate as a reflective layer made of aluminum. Is formed.
- an organic dye such as phthalocyanine or cyanine is used for a recording layer.
- the temperature of the recording layer made of organic dye on the disc is raised by a laser during writing. As a result, a part of the substrate is thermally deformed by heating the recording layer made of the organic dye.
- the rewritable optical disk 1 uses a phase change material for the recording layer.
- a phase change material for example, an alloy of Ag-In-Sb_Te (silver-indium-antimony tellurium) is used.
- Such a phase change material has a crystalline phase and an amorphous phase (amorphous phase).
- the recording layer made of the phase-change material is gradually cooled after being heated to a temperature near the crystallization temperature to be in a crystalline state.
- Data can be rewritten by reversibly changing between a crystalline phase and an amorphous phase.
- the innermost circumference of the optical disc 1 has a first lead-in area LII.
- the first program area PA1 is provided around the lead-in area LI1, and the first readout area LO1 is provided outside the first program area PA1. Audio data is recorded in the first program area PA1 in the same recording format as the data in the CD-DA format.
- the recording format is the same as the recording format of the CD-DA format, and it is not encrypted, so it is a player for normal music playback, that is, a CD_DA disc such as a CD player. It is possible to play back with a player having the above-mentioned playback function.
- a second lead-in area LI 2 is provided outside the first lead-out area L 0 1, a second program area PA 2 is provided around the outer periphery of the lead-in area LI 2, and a second program area outside the PA 2, a second lead out area LO 2 is provided.
- the second program area P A2 for example, audio data compressed by an encoding method such as ATRAC3 is encoded and recorded as content data.
- the second program area PA 2 includes an area AR 1 in which data is error-correction-coded by the CIRC 4 method and an area AR 2 in which data is error-correction-coded by the CIRC 7 method. And is divided into
- the audio data compressed by ATRAC3 is encrypted in the area A R1 and recorded as content data.
- key locker data K_L ⁇ CK and data of the software player SFT1 are recorded in the area AR1.
- Key-opening means that a plurality of content key data are coded and encrypted.
- Coded and encrypted content key data can be regarded as a real-world rocker storing multiple content keys, and is therefore called key rocker data.
- the keys in each room are often stored in a single lock and locked and managed.
- Encoding and encrypting a content key for decrypting a plurality of contents recorded on an optical disc is similar to storing and managing keys in each room in the real world in a secure manner.
- force data To encrypt and encrypt the content key data This is referred to as force data.
- the key rocker data can include copyright management information, which is data for managing copyright, such as content reproduction restrictions and copy restrictions for each content data.
- the data relating to the software player SFT1 is program data for decrypting the content data by software.
- At least part of the key data for decrypting the encryption of the content data recorded in the area AR1 of the second program area PA2 is hidden key data KH.
- the hidden key data KH is recorded in a form that can be decrypted by either the CIRC4 method or the CIRC7 method.
- both CIRC 4 and CIRC 7 systems perform error correction coding based on the CIRC (Cross Interleave Reed-Solomon Code) system used in ordinary CDs. However, their interleave lengths are different.
- the error correction coding method used in the drive of a normal CD-R disk, CD-R disk, and CD-RW disk is referred to as a CIRC4 method here.
- the error correction coding scheme that is to be adopted for double-density CDs is referred to herein as the CIRC7 scheme.
- the CIRC4 error correction decoder cannot decode data corrected and coded by the CIRC7 method. For this reason, the data in the area AR2 that has been error-correction-coded by the CIRC7 method cannot be decoded by an existing ordinary player drive.
- data that is in a particular array can be decoded using either CIRC4 or CIRC7.
- the special relation is, as explained later, when the data is arranged in two dimensions, the vertical unit is Is a case where the data is such that predetermined data is repeated.
- the above-mentioned hidden key data KH is data that repeats predetermined data in units of the vertical direction as described above, is subjected to error correction encoding by the CIRC7 method, and is recorded in the area AR2. I have.
- the content data recorded in the second program area PA 2 is reproduced by an existing player or drive having only a CIRC 4 type error correction decoding circuit.
- the application of software player SFT1 is started.
- the recording position of the hidden key data KH for decoding the data of the key rocker data K-LOCK in the area AR2 is written.
- the position where the hidden key data KH is recorded is specified.
- the hidden key data KH is recorded in the area AR2 in a form that can be decrypted by the CIRC4 system or the CIRC7 system. Therefore, the hidden key data KH can be obtained from the area AR2 by using an existing player or drive having only a CIRC4 error correction decoding circuit, as long as the recording position is known.
- the hidden key data KH is read from the second area AR 2 by accessing the position. .
- a key locker data key KL for decrypting the key locker data symbol is generated from the hidden key data KH, and the data of the locker K—L ⁇ CK is extracted by the key port data KL. .
- Content key for decrypting the content from the key lock Data KC is extracted, and the content key data KC is used to decrypt the content.
- the content key C for decrypting the content data is stored in the key locker data K—L 0 CK, and the key locker data key KL for decrypting the encryption of the key port header is stored.
- a part of the key for generating the key is recorded as hidden key data KH in the area AR2, but this is done by applying multiple keys to improve security and facilitate management. To do that.
- the content key data KC may be recorded in the area AR2 where the error correction coding is performed by the CIRC7 in such a manner that it can be decoded by the CIRC4 system or the CIRC7 system.
- the key KL may be recorded in an area A R2 where error correction encoding is performed by the CIRC7 in such a manner that it can be decoded by either the CIRC4 method or the CIRC7 method.
- the second program area P A2 is thus divided into two areas A R 1 and AR 2 having different error correction coding schemes.
- the area AR2 at least a part of the key data for decrypting the content data is recorded in a format that can be decrypted by the CIRC7 system or the CIRC4 system.
- hidden key data KH which is at least a part of key data for decrypting content data
- area AR2 Even if it is known that the data is recorded, the hidden key data KH is recorded in the area AR2 where the data is error-correction-coded by the CIRC7 method, and the area AR2 is recorded by a normal player or drive. Reading will result in an uncorrectable error. For this reason, it is not easy to find the hidden key data KH.
- the area AR 2 is the area where the data is error-correction coded according to the CI RC7 system, so even if the entire data recorded on the disc is copied, the data in the area AR 2 is copied as it is. Nevertheless, Hidden Key Data KH is protected. For this reason, the security of copying the entire data recorded on a disc (hereinafter simply referred to as “disk copying”) is also improved.
- FIG. 3 shows an outline of a process when disc data is copied from the original optical disc 1A to the copy destination optical disc 1B.
- the area AR 2 of the original optical disc 1 A records the error-corrected encoded data in the CIRC 7 format as described above.
- Hidden key data KH is recorded in a data format that can be decoded even in CIRC 7 format.
- the original optical disk 1A is mounted on the playback device 31, and the data of the optical disk 1A is read.
- the data on the original optical disk 1A is subjected to error correction processing by an error correction circuit 33 that performs error correction processing of the CIRC4 system.
- the uncorrectable errors are usually filled with interpolation data. Assuming that the uncorrectable error is filled with interpolation data, when data is output from the playback device 31, the data corresponding to the area AR2 is filled with interpolation data as shown in Fig. 4B. The hidden key data KH will be lost.
- the recording device 32 is loaded with an optical disc 1 B to be copied.
- the data input to the recording device 32 is supplied to a CIRC4 type error correction encoding circuit 34.
- the error correction encoding circuit 34 performs an error correction encoding process on the input data in a CIRC4 system.
- the data thus error-correction-coded by the CIRC4 method is recorded on the optical disc 1B.
- the error correction code is originally added to detect and correct a burst error or a random error.
- the key data for decrypting the content data is decoded by the CIRC 7 method in a form that can be decoded by the CIRC 7 method or the CIRC 4 method. In order to improve security by recording in the area AR2 where correction coding has been performed. are doing.
- CIRC which performs double error correction coding processing on C1 sequence (vertical direction) and C2 sequence (diagonal direction), is adopted as an error correction coding method.
- the error-corrected encoded data is EFM-modulated and recorded in units of one frame.
- Fig. 5 shows one frame of the CD data structure before EFM modulation.
- one frame when one frame is 16 bits of audio data, one frame consists of 24 symbols (6 symbols each for L (left) and R (right)) (1 symbol is 16 bits) It is divided into 8 bits (8 bits), 4-symbol Q parity, 4-symbol P parity, and 1 symbol subcode.
- One frame of data recorded on the disc is converted from 8 bits to 14 bits by EFM modulation, a DC suppression bit is added, and a frame sync is added.
- the total number of channel bits in one frame is 588 channel bits.
- the sub-code of one symbol in each frame is for each of the eight channels P to W Includes one bit of the channel.
- one sector is composed of data of the cycle (98 frames) in which the subcode is completed.
- the subcodes of the first two frames of the 98 frames are subcode frame syncs SO and SI.
- 98 sectors (2,352 bytes), which is a unit of subcode, are defined as one sector.
- FIG. 7 and FIG. 8 are block diagrams shown along the flow of the coding of the CIRC system.
- the encoding of audio data is targeted for easy understanding.
- the output from the Z scramble circuit 11 is supplied to the C 2 encoder 12.
- the C 2 encoder 1 2 encodes (28, 24, 5) Reed-Solomon code on GF (28), and generates 4-symbol Q parity Q 12n, Q12n + 1, Q12n + 2, Q12n + 3 Occurs.
- P parity P12n, P12n + l, P12n + 2, P12n + 3 of 4 symbols are generated from C1 encoder 14-4.
- the minimum distance for both the CI code and the C2 code is 5. Therefore, it is possible to correct (2) the correction of the symbol and the erasure correction of the symbol (when the position of the error symbol is known).
- the 32 symbol from the C1 encoder 14 is supplied to the one-symbol delay circuit 15.
- the 1-symbol delay circuit 15 is to prevent the occurrence of 2-symbol error due to an error that crosses the boundary between symbols by separating adjacent symbols.
- the Q parity is inverted by inversion, so that errors can be detected even when data and parity are all zero.
- the unit delay D of the interleave circuit 13 is different between the case of the CIRC4 system and the case of the CIRC7 system. Burst errors are dispersed by the interleave circuit 13.
- FIG. 9 and FIG. 10 are block diagrams represented along the flow of decryption. is there.
- the decoding process is performed in the reverse order of the above-described encoding process.
- reproduction data from the EFM demodulation circuit is supplied to the one symbol delay circuit 21.
- the delay given by the one symbol delay circuit 15 on the encoding side is canceled in this circuit 21.
- the 32 symbol from the 1 symbol delay circuit 21 is supplied to the C 1 decoder 22.
- the output of the C1 decoder 22 is supplied to the interleave circuit 23.
- Dinning leave circuit 23 cancels 27 D, 26 D,..., D, 0 with respect to 28 symbol so as to cancel the delay amount given by in-leave leave circuit 13. Provides an amount of delay that varies in an equal manner.
- the output of the din-live circuit 23 is supplied to the C2 decoder 24, where the C2 code is decoded.
- the output of the 24 symbol of the C 2 decoder 24 is supplied to the 2 symbol delay / descramble circuit 25. From this circuit 25, decoded data of 24 symbols is obtained.
- An interpolation flag is generated by the interpolation flag generation circuit 26 from the error flags from the C1 decoder 22 and the C2 decoder 24. Data indicating an error is interpolated by the interpolation flag.
- error correction coding is performed in the C1 sequence in the vertical direction
- error correction coding is performed in the C2 sequence in the diagonal direction
- error correction coding is performed twice.
- the interleave length is different between the CIRC4 system and the CIRC7 system.
- the total interleave length stipulates the ability to correct burst errors in which a large number of data are continuously erroneous due to fingerprints on the disc, scratches on the disc, etc.
- the longer the interleave length the higher the burst error correction ability.
- double-density CDs it is required to improve the ability to correct burst errors. For this reason, double-density CDs are expected to improve error correction performance against burst errors by using CIRC 7 error correction codes.
- data is error-correction-encoded and recorded by the CIRC 7 method and can be decoded by the CIRC 7 method or the CIRC 4 method.
- the data pattern is included. Data that can be decoded by either the CIRC7 system or the CIRC4 system will be described.
- decoding can be performed by a CIRC4 decoder or a CIRC7 decoder.
- Fig. 13 explains the data arrangement that can be decoded by both the CIRC4 decoder and the CIC7 decoder.
- the vertical direction is used as a unit.
- data is repeated with al, a2, a3, and a4 as one unit.
- the same data is arranged in the horizontal direction. That is, as shown in Fig. 13, the data in the first row in the horizontal direction are all a1, the data in the second row are all a2, and the data in the third row are all a1. a3, the data in the fourth row are all a4, and the same data is arranged in the horizontal direction.
- the C1 sequence is of course the same, but the C2 sequence is the same for the CIRC4 system and the CIRC7 system. That is, in the example of Fig. 12, the parity of the C2 sequence is always formed by al, a2, a3, a4 regardless of the total interleave length (that is, the angle in the oblique direction). You.
- the error-corrected coded data can be decoded by the CIRC 4 decoder using the CIRC 7 method, or the error-corrected data can be decoded by the CIRC 4 method.
- the encoded data can be decoded by a CIRC 7 decoder.
- FIGS. 14A and 14B show the configuration of a recording apparatus for producing the optical disc 1 as described above.
- the input terminal 51 Digital audio data is supplied as content data to be recorded in the area PA1.
- the input terminal 52 is supplied with content data to be recorded in the program area PA2.
- the content data is digital audio data compressed by a compression method such as ATRAC3.
- the content key from the input terminal 52 is supplied to the encryption circuit 55.
- the content key key KC is supplied from the content key generation circuit 56 to the encryption circuit 55.
- the content data is encrypted by the content key data KC from the content key generation circuit 56.
- the decoded content data is supplied to an error correction encoding circuit 54 that performs error correction encoding processing of the CIRC4 system.
- the content key data KC from the content key generation circuit 56 is supplied to an encryption circuit 55 and also to a locker data generation circuit 57. 01 ⁇ 1
- the generation circuit 58 generates a copyright management data DRM for the content data.
- the copyright management data is, for example, whether the reproduction of the content data is permitted or prohibited, whether the duplication of the content data is permitted or prohibited, and whether the duplication of the content data is permitted for one generation or for multiple generations. Is shown.
- the key mouth data generating circuit 57 the content key data KC and the copyright management data DRM are encoded, and key rocker data is generated.
- the output data from the key port header generation circuit 57 is supplied to a key locker data encryption circuit 59.
- the key rocker data encryption circuit 59 is supplied with the key rocker data key KL from the hash calculation circuit 60.
- the key rocker data generated by the key-lock data generation circuit 57 is encrypted by the key-port encryption circuit 59 by the key rocker data key KL from the hash operation circuit 60.
- the hash calculation circuit 60 generates a key-opening key KL from the device key data KD and the hidden key data KH.
- the hash operation circuit 60 is supplied with the device key data KD from the input terminal 61 and the hidden key data KH from the hidden key data generation circuit 62.
- the device key data KD is stored somewhere on the device as unique data.
- the hidden key data KH is generated by a hidden key data generating circuit 62 using random numbers.
- a key rocker data key KL is generated by a hash operation from the device key data KD from the input terminal 61 and the hidden key data KH from the hidden key data generation circuit 62. You.
- the key locker data key KL is supplied to the key rocker data encryption circuit 59.
- the one-day data generated by the key rocker data generating circuit 57 is encrypted by the one-time data key KL from the hash operation circuit 60.
- the encrypted key K__L 0 CK is supplied to a CIRC4 type error correction coding circuit 54.
- data of the software player SFT1 which is program data for performing decoding of a symbol by software, is generated.
- the data of the software player SFT1 is supplied to an error correction encoding circuit 54 of the CIRC4 system.
- the error correction coding circuit 54 of CIRC 4 performs double error correction coding processing on the C1 sequence (vertical direction) and the C2 sequence (diagonal direction).
- the hidden key data KH from the hidden key data generation circuit 62 is supplied to the CIRC 4 / CIRC 7 pattern conversion circuit 65.
- CIRC 4 / C The IRC 7 pattern conversion circuit 65 converts the information of the hidden key data KH from the hidden key data generation circuit 62 into a CI scale 4 format. It converts the data into data that can be decrypted even in the IRC 7 format.
- the data that can be decoded by the CI RC 4 system and the CI RC 7 system is a predetermined unit with the vertical direction (C1 series) as the unit when the data is arranged two-dimensionally.
- the data is data that repeats.
- the output of the CI RC 4 / CI RC 7 pattern conversion circuit 65 is supplied to the mix circuit 66.
- the data to be recorded in the area AR2 is supplied from the input terminal 70 to the mix circuit 66.
- the data to be recorded in the area AR 2 may be any data.
- data that can be reproduced only by a device equipped with a CIRC 7 decoder is assumed to be data to be recorded in the area AR 2. May be.
- the mix circuit 66 mixes the data from the input terminal 70 and the information of the hidden key data KH from the CIRC4 / CIRC7 pattern conversion circuit 65 at a predetermined position.
- the position at which the data from this input terminal 69 is mixed with the secret key data KH from the CI RC 4 / CI RC 7 pattern conversion circuit 65 is described in the soft-to-air player S FT 1 by the mix position specifying circuit 69. It is set according to the position being set.
- the output of the mix circuit 66 is supplied to an error correction encoding circuit 67 of the CIRC7 system.
- the error correction coding circuit 67 of CIRC 7 performs double error correction coding processing on the C1 sequence (vertical direction) and the C2 sequence (diagonal direction).
- the outputs of the CI RC 4-type error correction coding circuit 54 and the CI RC 7-type error correction coding circuit 67 are supplied to the subcode addition circuit 71.
- the output of the subcode addition circuit 71 is supplied to the modulation circuit 72.
- the modulation circuit 72 performs EFM modulation on the recording data.
- the optical disc 1 is placed on a turntable (not shown) and rotated by a spindle motor 73.
- the spindle motor 73 is driven to rotate at a constant linear velocity (CLV) or a constant angular velocity (CAV) by the spindle control circuit 75 under the control of the servo control circuit 74.
- the servo control circuit 74 generates various servo drive signals for focus, tracking, thread, and spindle based on the focus error signal, the racking error signal, and the operation command from the system controller 80, and the actuator control signal is generated. Output to overnight control circuit 76, thread control circuit 77, and spindle control circuit 75.
- the optical pickup 78 is a mechanism for scanning concentrically or spirally formed tracks on the optical disc 1 while condensing laser light of a semiconductor laser as a light source on the signal surface of the optical disc 1. It is.
- the laser beam from the optical pickup 78 moves the track following the surface runout and eccentricity of the optical disc 1 by moving the object lens supported by the actuator in the focusing direction and the tracking direction. Scan.
- the operation is controlled by the operation control unit 76 under the control of the support control circuit 74.
- the entire optical pickup 78 can be moved in the radial direction of the disk by a thread mechanism 79.
- the movement of the thread mechanism 79 is controlled by the thread control circuit 77 under the control of the support control circuit 74.
- the output data of the modulation circuit 72 is supplied to the optical pickup 78.
- the optical pickup 78 outputs laser light whose emission waveform has been modulated in accordance with the output data of the modulation circuit 72. This laser light is applied to the recording surface of the optical disc 1 to record information on the optical disc 1.
- digital audio data from the input terminal 51 is supplied to a CIRC4 type error correction encoding circuit 54.
- the error correction coding circuit 54 performs error correction coding processing on the digital audio data in the CIRC4 system.
- the output data of the error correction encoding circuit 54 is supplied to the optical pickup 78 via the subcode adding circuit 71 and the modulation circuit 72, and is recorded on the optical disc 1.
- the content data from the input terminal 52 is encrypted by the encryption circuit 55.
- the content data encrypted by the encryption circuit 55 is supplied to an error correction encoding circuit 54 of the CIRC4 system.
- the error correction encoding circuit 54 performs an error correction encoding process on the content data in a CIRC4 system.
- the output data of the error correction encoding circuit 54 is supplied to the optical pickup 78 via the subcode adding circuit 71 and the modulation circuit 72, and is recorded on the optical disk 1.
- Content key data K C for encrypting the content data is generated by a content key generation circuit 56.
- the content key data KC is coded together with the copyright management data DRM from the DRM generation circuit 58 by the key port data generation circuit 57 to generate key rocker data data.
- the data data is encrypted by the key locker data encryption circuit 59 in the key locker key data KL.
- the encrypted key data K—LOCK is supplied to a CIRC4 type error correction encoding circuit 54.
- the output data of the error correction encoding circuit 54 is supplied to the optical pickup 78 via the subcode addition circuit 71 and the modulation circuit 72, and is recorded on the optical disk 1.
- Software player SF in program area PA 2 of optical disk 1 When recording the data of T1, the data of the software player SFT1 is output from the software player generation circuit 63, and the data of the software player SFT1 is output to the CIRC4 type error correction coding circuit 54. Supplied to The output data of the error correction encoding circuit 54 is supplied to the optical pickup 78 via the sub code addition circuit 71 and the modulation circuit 72, and is recorded on the optical disc 1.
- the data from the input terminal 70 is transmitted through the mix circuit 66 to the error correction coding circuit 6 of the CIRC 7 system. Supplied to 7.
- the hidden key data KH which is data that can be decrypted in either the CIRC4 system or the CIRC7 system, is supplied to the mixing circuit 66.
- the position in the area AR2 where the hidden key data KH is to be recorded is described in the software player SFT1 from the soft-to-air player generation circuit 63.
- the mix position specifying circuit 69 mixes the data from the input terminal 68 with the hidden key data K H in accordance with the position described in the software player SFT1.
- the output of the mix circuit 66 is supplied to an error correction encoding circuit 67 of the CIRC7 system.
- the error correction coding circuit 67 performs error correction coding on the digital audio data in accordance with the CIRC7 method.
- the output data of the error correction encoding circuit 67 is supplied to the optical pickup 78 through the subcode adding circuit 71 and the modulation circuit 72, and is recorded on the optical disk 1.
- FIGS. 15A and 15B show the configuration of a reproducing apparatus for reproducing data from the optical disk 1.
- FIG. 15A and 15B show the configuration of a reproducing apparatus for reproducing data from the optical disk 1.
- this playback device is an ordinary player or drive,
- the content is further decrypted. Therefore, various key reproduction circuits, key rocker data reproduction circuits, and content data decoding circuits are realized by software.
- the block diagrams corresponding to the functions are described. Of course, it is also possible to realize them with hardware for processing these.
- the optical disc 1 is placed on a table (not shown) and rotated by a spindle motor 81.
- the spindle motor 81 is rotationally driven at a constant linear velocity (CLV) or a constant angular velocity (CAV) by the spindle control circuit 82 under the control of the servo control circuit 83.
- the support control circuit 83 generates various servo drive signals of focus, tracking, thread, and spindle based on the focus error signal and the tracking error signal, and the operation command from the system controller 80, and performs the operation. It outputs to the evening control circuit 84, the thread control circuit 85, and the spindle control circuit 82.
- the optical pickup 87 is a mechanism for scanning a concentrically or spirally formed track on the optical disk 1 while condensing the laser light of a semiconductor laser as a light source on the signal surface of the optical disk 1. The entire optical pickup 87 is moved in the radial direction of the optical disc 1 by a thread mechanism 88.
- the output signal of the optical pickup 87 is supplied to a demodulation circuit 90 via an RF amplifier 89.
- the demodulation circuit 90 performs EFM demodulation.
- the output data of the demodulation circuit 90 is supplied to the subcode extraction circuit 91.
- the subcode extraction circuit 91 extracts subcode data.
- the output data of the subcode extraction circuit 91 is supplied to an error correction circuit 92 that performs error correction processing of the CIRC4 system.
- the optical pickup 87 accesses the program area PA1, and the data in the program area PA1 is read.
- the output signal from the optical pickup 87 is supplied to an error correction circuit 92 via an RF amplifier 89, a demodulation circuit 90, and a subcode extraction circuit 91.
- the error correction circuit 92 carries out CIRC 4 error correction processing, and the error correction circuit 92 outputs audio data. This audio data is output from the output terminal 94 via the switching circuit 93.
- the content data of the program area PA2 of the optical disc 1 is encrypted. Therefore, in order to play back the entire contents of the program area PA2, it is necessary to decrypt the contents.
- the optical pickup 87 accesses the head of the area of the program area P A2 where the data of the software player SFT 1 is recorded.
- the data from the software player SFT1 is supplied to the error correction circuit 92 via the RF amplifier 89, the demodulation circuit 90, and the subcode extraction circuit 91.
- Error correction processing of CIRC 4 is performed in the error correction circuit 92, and the data of the software player SFT1 is output from the error correction circuit 92.
- the data of the software player is sent to the software player starting unit 95 via the switching circuit 93.
- the software player activation unit 95 determines at which position in the area AR2 from the data of the software player SFT1 whether data that can be decoded by the CIRC4 system or the CIRC7 system is described.
- the optical pickup 87 is accessed to that position. In this area, both CIRC 4 and CIRC 7 methods in AR 2 are restored.
- the data that can be decoded is supplied to an error correction circuit 92 via an RF amplifier 89, a demodulation circuit 90, and a subcode extraction circuit 91.
- the output data of the error correction circuit 92 is supplied to the hidden key reproducing circuit 96.
- the hidden key data KH is reproduced by the hidden key reproducing circuit 96.
- the hidden key data KH reproduced by the hidden key reproduction circuit 96 is supplied to the hash calculation circuit 97.
- the hash operation circuit 97 is supplied with device key data KD unique to the playback device from the input terminal 104.
- a key-opening key data key KL is obtained from the hidden key data KH and the device key data KD.
- the key locker data key KL is supplied to the encryption / decryption circuit 99.
- the optical pickup 87 is moved to the position of the key rocker data K—LOCK in the program area PA 2 and the key rocker data K—L ⁇ CK Is played.
- the output signal from the optical pickup 87 corresponding to the key locker K-L0CK is RF amplifier 89, demodulation circuit 90, subcode extraction circuit 91, error correction circuit 92, switching circuit 9
- the signal is supplied to the key rocker data reproducing circuit 98 via the terminal 3.
- the output of the key rocker data reproduction circuit 98 is supplied to the encryption / decryption circuit 99.
- the key locker data K—LO CK is decrypted by the key locker key KL from the hash operation circuit 97.
- the output data of the encryption / decryption circuit 99 is supplied to the content key reproduction circuit 100 and also to the copyright management data reproduction circuit 101.
- the content key reproducing circuit 100 extracts the content key data KC from the key rocker data K-LOCK.
- the content key data KC is supplied to the encryption / decryption circuit 102.
- the copyright management data playback circuit 101 retrieves the copyright management data DRM from the key lock data K LOCK. Will be issued.
- the copyright management data DRM is sent to the system controller 80.
- the optical pickup 8 is read out from the optical disk 1 when the content key data KC is extracted from the optical disk 1 and the content key data KC is taken out of the keyed data K-L0CK. 7 is moved to the position of the content data in the program area PA2, and the encrypted content data is read.
- the signal is supplied to a signal decoding circuit 102 via a pump 89, a demodulation circuit 90, a subcode extraction circuit 91, an error correction circuit 92, and a switching circuit 93.
- the encryption / decryption circuit 102 the content key data KC from the content key reproduction circuit 100 is used to decrypt the encrypted content data, and the content data is decoded.
- the decrypted content data is output from the output terminal 103.
- the optical disk 1 to which the present invention is applied has a format in which the hidden key data KH is error-corrected and coded by the CIRC 7 system in a form that can be decoded by the CI RC 7 system or the CI RC 4 system.
- the area is recorded in AR2, and its position is specified by the data of software player SFT1.
- the secret key data KH is recorded in the area AR2 where the data is error-correction-coded by the CIRC7 system, in a form that can be decoded by the CIRC7 system or the CIRC4 system.
- recording in a format that can be decrypted by both CIRC 7 and CIRC 4 methods is not limited to hidden key data overnight KH.
- the content key data KC may be recorded, or the key entry key KL may be recorded.
- various data may be recorded in the area AR2 in a format that can be decoded by the CIRC7 system or the CIRC4 system, and the software player SFT1 may be used as the data indicating the recording positions of these pieces of information.
- the recording position of data recorded in a format that can be decoded by the CIRC7 system or the CIRC4 system is indicated by the software player SFT1, but this recording position is designated. It is not limited to the software player SFT1.
- the optical disk is divided into an inner area and an outer area as shown in Fig. 1 and Fig. 2.
- CD-DA data is recorded on one side and compressed on the other side.
- the optical disk of the two sessions in which the recorded audio data is encrypted is recorded, it is needless to say that an optical disk of one session may be used as shown in FIG.
- a lead-in area LI is provided on the innermost circumference of the optical disc
- a program area PA is provided on the outer circumference of the lead-in area LI
- a lead-out area is provided outside the program area PA.
- the program area PA in which the LO is provided is divided into an area AR1 and an area AR2.
- data is recorded after being error-corrected by a CIRC4 error correction code.
- the key rocker data K-LOCK2 and the data of the software player SFT1 are recorded, and the data is recorded after being error-correction-coded according to the CIRC7 method. Is the data that can be decrypted by both CIRC 4 and CIRC 7 systems, and includes the hidden key data KH.
- data that can be decoded by a plurality of error correction methods can be extended not only to the CIRC method but also to other coding methods such as error correction coding in two sequences.
- data that can be decoded by a plurality of error correction codes is conceivable as in the case of CIRC.
- the part of the area AR 2 is subjected to error correction coding by CIRC 7 and converted into data by (: 1 14 method or (: 1; ⁇ C 7 method). If a part containing data that can be decoded by either the CIRC 4 or CIRC 7 system is mistakenly reproduced as a sound, the sound may be offensive. For example, it is conceivable that the upper bits of the PCM signal are all set to 0 so that the sound is low. Of course, if 1 is a low sound, the upper bits are all set to 1.
- the sound generated in the decodable part is DC or high frequency in both the CIRC4 and CIRC7 systems, the user will not notice it easily, and there is a risk of raising the volume. Therefore, it is conceivable to embed the data of 0 and the data of 1 in a specific pattern in the portion including the data that can be decoded by both methods, and generate sound in the audible band. As an example, it is possible to repeat 0 and 1 at 7.35 kHz.
- an optical disk used as a data recording medium records data that has been subjected to error correction coding with at least two or more error correction codes. For example, while data is recorded after being error-correction-encoded by CIRC4, an area is provided for error-correction-encoding by CIRC7. The data in a format that can be decoded by the CIRC4 method or the CIRC7 method is recorded therein.
- the present invention provides a data recording medium for encrypting and recording content data, such as a CD, and a recording method and apparatus for recording data on such a data recording medium.
- the data reproducing method and apparatus for reproducing such a data recording medium are suitable for use in protecting content data.
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Physics & Mathematics (AREA)
- Probability & Statistics with Applications (AREA)
- Theoretical Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Television Signal Processing For Recording (AREA)
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
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AU2002364785A AU2002364785B2 (en) | 2001-12-21 | 2002-12-19 | Data record medium, data recording method and apparatus, and data reproducing method and apparatus |
EP02790810A EP1457985B1 (en) | 2001-12-21 | 2002-12-19 | Data record medium, data recording method and apparatus, and data reproducing method and apparatus |
DE60228490T DE60228490D1 (de) | 2001-12-21 | 2002-12-19 | "datenaufzeichnungsmedium, datenaufzeichnungsverfahren und vorrichtung und datenwiedergabeverfahren und vorrichtung" |
KR10-2003-7009371A KR20040062426A (ko) | 2001-12-21 | 2002-12-19 | 데이터 기록 매체, 데이터 기록 방법 및 장치, 데이터재생 방법 및 장치 |
US10/467,339 US7151733B2 (en) | 2001-12-21 | 2002-12-19 | Data recording medium, data recording method and apparatus, and data reproducing method and apparatus |
HK04107967A HK1065161A1 (en) | 2001-12-21 | 2004-10-14 | Data recording method and apparatus, and data reproducing method and apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2001-389750 | 2001-12-21 | ||
JP2001389750A JP3575461B2 (ja) | 2001-12-21 | 2001-12-21 | 記録媒体、記録方法および装置、ならびに、再生装置および方法 |
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WO2003054882A1 true WO2003054882A1 (fr) | 2003-07-03 |
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PCT/JP2002/013301 WO2003054882A1 (fr) | 2001-12-21 | 2002-12-19 | Support, procede et appareil d'enregistrement de donnees, et procede et appareil de reproduction de donnees |
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US (1) | US7151733B2 (ja) |
EP (1) | EP1457985B1 (ja) |
JP (1) | JP3575461B2 (ja) |
KR (1) | KR20040062426A (ja) |
CN (1) | CN1311461C (ja) |
AU (1) | AU2002364785B2 (ja) |
DE (1) | DE60228490D1 (ja) |
HK (1) | HK1065161A1 (ja) |
WO (1) | WO2003054882A1 (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP3575461B2 (ja) | 2001-12-21 | 2004-10-13 | ソニー株式会社 | 記録媒体、記録方法および装置、ならびに、再生装置および方法 |
JP3960061B2 (ja) | 2002-01-31 | 2007-08-15 | ソニー株式会社 | データ記録媒体、データ記録方法および装置、データ再生方法および装置、データ送信方法およびデータ受信方法 |
EP1805760A1 (en) * | 2004-10-21 | 2007-07-11 | Koninklijke Philips Electronics N.V. | Method of saving keylockers on optical discs |
US9459955B2 (en) * | 2012-05-24 | 2016-10-04 | Sandisk Technologies Llc | System and method to scramble data based on a scramble key |
JP6782190B2 (ja) * | 2017-04-25 | 2020-11-11 | 株式会社東芝 | ディスク装置、コントローラ回路、及び制御方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07211014A (ja) * | 1994-01-14 | 1995-08-11 | Sony Corp | 誤り訂正符号符号化方法、誤り訂正符号復号化方法、誤り訂正符号符号化装置、誤り訂正符号復号化装置、デイジタル信号符号化方法、デイジタル信号復号化方法、デイジタル信号符号化装置、デイジタル信号復号化装置及び記録媒体 |
EP0743642A2 (en) * | 1995-05-18 | 1996-11-20 | Sony Corporation | Data recording/reproducing apparatus corresponding to a plurality of error correcting system and a data recording medium |
JP2000276852A (ja) * | 1999-03-19 | 2000-10-06 | Sony Corp | 記録方法、記録媒体、エンコード装置及び記録装置 |
US6144743A (en) * | 1997-02-07 | 2000-11-07 | Kabushiki Kaisha Toshiba | Information recording medium, recording apparatus, information transmission system, and decryption apparatus |
EP1107234A2 (en) * | 1999-12-10 | 2001-06-13 | Sony Corporation | Method for formatting an audio bitstream |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5341356A (en) * | 1991-04-02 | 1994-08-23 | U.S. Philips Corporation | Method and device for recording information volumes in a track of a record carrier, and a device for reading the record carrier |
JP3483612B2 (ja) * | 1994-04-08 | 2004-01-06 | 株式会社東芝 | 記録方法、記録装置並びに再生装置 |
MY116522A (en) * | 1995-05-31 | 2004-02-28 | Sony Corp | Data recording/reproducing apparatus, method thereof, and data recording medium |
TW307862B (ja) * | 1995-06-20 | 1997-06-11 | Sony Co Ltd | |
JPH09115241A (ja) * | 1995-06-30 | 1997-05-02 | Sony Corp | データ記録装置及び方法、データ再生装置及び方法、並びに記録媒体 |
DE69618509T2 (de) * | 1995-07-14 | 2002-08-29 | Sony Corp | Übertragung, Aufzeichnung und Wiedergabe von Daten |
JP3951317B2 (ja) * | 1995-09-28 | 2007-08-01 | ソニー株式会社 | データ記録/再生のための装置および方法 |
JP2000207829A (ja) * | 1999-01-11 | 2000-07-28 | Yamaha Corp | 暗号化及びその解除方式 |
WO2001030019A1 (fr) * | 1999-10-18 | 2001-04-26 | Sony Corporation | Processeur d'information et procede de traitement d'information, support enregistre |
JP2001307424A (ja) * | 2000-04-21 | 2001-11-02 | Pioneer Electronic Corp | 情報記録装置及び方法、情報再生装置及び方法並びに情報記録媒体 |
JP3575461B2 (ja) | 2001-12-21 | 2004-10-13 | ソニー株式会社 | 記録媒体、記録方法および装置、ならびに、再生装置および方法 |
-
2001
- 2001-12-21 JP JP2001389750A patent/JP3575461B2/ja not_active Expired - Lifetime
-
2002
- 2002-12-19 EP EP02790810A patent/EP1457985B1/en not_active Expired - Fee Related
- 2002-12-19 CN CNB028047370A patent/CN1311461C/zh not_active Expired - Fee Related
- 2002-12-19 AU AU2002364785A patent/AU2002364785B2/en not_active Ceased
- 2002-12-19 KR KR10-2003-7009371A patent/KR20040062426A/ko active IP Right Grant
- 2002-12-19 DE DE60228490T patent/DE60228490D1/de not_active Expired - Lifetime
- 2002-12-19 WO PCT/JP2002/013301 patent/WO2003054882A1/ja active IP Right Grant
- 2002-12-19 US US10/467,339 patent/US7151733B2/en not_active Expired - Fee Related
-
2004
- 2004-10-14 HK HK04107967A patent/HK1065161A1/xx not_active IP Right Cessation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07211014A (ja) * | 1994-01-14 | 1995-08-11 | Sony Corp | 誤り訂正符号符号化方法、誤り訂正符号復号化方法、誤り訂正符号符号化装置、誤り訂正符号復号化装置、デイジタル信号符号化方法、デイジタル信号復号化方法、デイジタル信号符号化装置、デイジタル信号復号化装置及び記録媒体 |
EP0743642A2 (en) * | 1995-05-18 | 1996-11-20 | Sony Corporation | Data recording/reproducing apparatus corresponding to a plurality of error correcting system and a data recording medium |
US6144743A (en) * | 1997-02-07 | 2000-11-07 | Kabushiki Kaisha Toshiba | Information recording medium, recording apparatus, information transmission system, and decryption apparatus |
JP2000276852A (ja) * | 1999-03-19 | 2000-10-06 | Sony Corp | 記録方法、記録媒体、エンコード装置及び記録装置 |
EP1107234A2 (en) * | 1999-12-10 | 2001-06-13 | Sony Corporation | Method for formatting an audio bitstream |
Non-Patent Citations (1)
Title |
---|
See also references of EP1457985A4 * |
Also Published As
Publication number | Publication date |
---|---|
EP1457985A4 (en) | 2006-08-16 |
HK1065161A1 (en) | 2005-02-08 |
CN1311461C (zh) | 2007-04-18 |
KR20040062426A (ko) | 2004-07-07 |
US20040073852A1 (en) | 2004-04-15 |
EP1457985A1 (en) | 2004-09-15 |
DE60228490D1 (de) | 2008-10-02 |
AU2002364785A1 (en) | 2003-07-09 |
JP2003196930A (ja) | 2003-07-11 |
EP1457985B1 (en) | 2008-08-20 |
CN1491414A (zh) | 2004-04-21 |
JP3575461B2 (ja) | 2004-10-13 |
US7151733B2 (en) | 2006-12-19 |
AU2002364785B2 (en) | 2008-10-02 |
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