WO2000026912A1 - Disque optique, procede de reproduction et de copie d'un disque optique, et procede de prevention de l'usage illegal d'un disque optique - Google Patents
Disque optique, procede de reproduction et de copie d'un disque optique, et procede de prevention de l'usage illegal d'un disque optique Download PDFInfo
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- WO2000026912A1 WO2000026912A1 PCT/JP1999/006102 JP9906102W WO0026912A1 WO 2000026912 A1 WO2000026912 A1 WO 2000026912A1 JP 9906102 W JP9906102 W JP 9906102W WO 0026912 A1 WO0026912 A1 WO 0026912A1
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- disc
- information area
- optical disk
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Classifications
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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
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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
- G11B20/00681—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which prevent a specific kind of data access
- G11B20/00688—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which prevent a specific kind of data access said measures preventing that a usable copy of recorded data can be made on another medium
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/02—Control of operating function, e.g. switching from recording to reproducing
- G11B19/04—Arrangements for preventing, inhibiting, or warning against double recording on the same blank or against other recording or reproducing malfunctions
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/02—Control of operating function, e.g. switching from recording to reproducing
- G11B19/12—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark
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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
-
- 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
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
- G11B7/0037—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with discs
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/005—Reproducing
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
Definitions
- optical disc optical disc reproducing apparatus and copying apparatus, and method for preventing illegal use of optical disc
- the present invention relates to an optical disk, a reproducing apparatus and a duplicating apparatus for an optical disk, and a method for preventing illegal use of an optical disk.
- recorded signals such as video and audio are reproduced.
- the present invention relates to a disk-shaped optical disk (recording medium) on which encryption is recorded and a device for reproducing or copying the optical disk.
- DVD disc that records (records) movies, music, and the like
- data such as video and audio is encrypted and recorded to protect copyright from unauthorized duplication.
- the DVD playback device When playing back this DVD disc with the DVD playback device, the DVD playback device reads the key information recorded in the sub information area of the same DVD disc, and encrypts the data information using the key information. It decrypts and reconstructs the original video and audio for playback.
- FIG. 12 is a perspective view showing a schematic structure of a conventional DVD disk which is powerful.
- reference numeral 101 denotes a DVD disk.
- Reference numeral 102 denotes a main information area of the DVD disc 101, and data information such as video and audio is normally encrypted and recorded in the main information area 102.
- Reference numeral 103 denotes a key information area in which key information for decrypting the data information recorded in the main information area 102 is recorded.
- the key information area 103 is located on the inner peripheral side of the DVD disc 101.
- FIG. 11 is a block diagram showing a schematic configuration of a conventional DVD playback device.
- reference numeral 101 denotes the DVD disc shown in FIG. 12, which records video and audio data information to be reproduced.
- Reference numeral 104 denotes an optical pickup, which emits laser light. Use to read the recording signal of DVD disc 101.
- a transport controller 105 moves the optical pickup 104 in the radial direction of the DVD disk 101 to read a recording signal at an arbitrary position on the DVD disk 101.
- 106 is a disk motor for rotating the DVD disk 101.
- a first control circuit 107 controls the optical pickup 104, the transfer controller 105, and the disk motor 106.
- Reference numeral 108 denotes an amplifier, which amplifies the signal read by the optical pickup 104.
- Reference numeral 109 denotes a second control circuit, which receives an output signal of the amplifier 108 and from which a servo signal such as a focus error signal and a tracking error signal necessary for reading the DVD disk 101 by the optical pickup 104 is used. Generate and output to the first control circuit 107. Further, the second control circuit 109 digitizes (binarizes) the input signal which is an analog signal. A demodulation circuit 110 analyzes a read signal from the digitized DVD disc 101 and reconstructs data information such as original video and music.
- Reference numeral 1 1 denotes a system control circuit which controls the entire DVD player.
- the transport controller 105 When playing a commercially available DVD disc, the transport controller 105 first drives the optical pickup 104 into the DVD disc 101 by driving the first control circuit 107 in accordance with the instructions of the system control circuit 111. Move to the periphery.
- the read signal of the optical pickup 104 is amplified by the amplifier 108, converted into a digital signal by the second control circuit 109, and read by the demodulation circuit 110.
- the demodulation circuit 110 sends the result to the system control circuit 111, and if the read content is not the key information in the key information recording area 103 (see FIG. 12), the system control circuit 111 again transmits the result.
- An instruction is issued to the first control circuit 107, and by the drive of the first control circuit 107, the transfer controller 105 moves the optical pickup 104 further inward to search for the key information of the DVD disk 101.
- the demodulation circuit 110 reads the key information.
- the system control circuit 111 detects that the demodulation circuit 110 has read the key information of the DVD disc 101
- the first control circuit 107 3 By driving, the transfer controller 105 sends the optical pickup 104 in the outer peripheral direction, and the optical pickup 104 is the recording signal of the main information area 102 of the DVD disc 101 (see Fig. 12). Is read.
- This recorded signal is generally encrypted, it does not become a normal video or audio signal even if it is played back as it is, but the key information recorded in the key information area This symbol can be solved by using The demodulation circuit 110 decrypts the recording signal in the main information area 102 using the read key information, and reconstructs the original normal video and audio data.
- FIG. 9 shows a section of a commercially available DVD disk 1 cut in the radial direction, and a recording state of the information.
- the left side is the disk inner peripheral side
- the right side is the disk outer peripheral side.
- 32 is a main information area (main recording area)
- 33 is a key information recording area.
- Reference numeral 43 denotes first key information, and this information is recorded in a key information recording area 33.
- Reference numeral 4 denotes main data, and this information is recorded in the main information area 32.
- the main data 44 is a state in which data such as video and music is encrypted, and this encryption can be decrypted by using the first key information 43.
- Reference numeral 45 denotes a recordable DVD disk (DVD-R disk), in which signals can be freely recorded in its main recording area 32.
- Reference numeral 46 denotes another key information (second key information) formed in advance by pre-pits instead of the regular key information.
- the key information recording area 33 of the recordable DVD disk 45 cannot be rewritten in advance. It is recorded in a proper state.
- the second key information 46 is invalid data for use in decrypting data, and is key information that cannot decrypt any main data 44.
- the main data 4 4 recorded in the main information area 32 of the recordable DVD disk 45 has exactly the same contents as the main data 44 of the copy source DVD disk 1.
- the inner periphery of the recordable DVD disk is 4 Since the second key information 46 recorded in the key information area 33 at a predetermined position contains invalid data that is different from the data that solves the original symbol, this invalid key information However, encrypted data cannot be reconstructed into the original normal video and audio signals. As a result, it is impossible to play recordable DVD discs that have been illegally copied.
- Fig. 10 shows a DV that has only regular key data of a commercially available reproduction-only DVD that is the copy source.
- FIG. 3 is a diagram showing a D disk.
- FIG. 10 shows a state in which the contents and key information of a commercially available DVD disc in which movies, music, and the like are recorded on a recordable DVD disc are copied to the main information area.
- both the main data 44 and the first key information 43 of the copy source DVD disk 1 are recorded in the main information area 32 of the recordable DVD disk 45 as shown in FIG. Has been recorded.
- the second key information 46 which is the original key information, is recorded in advance.
- the data is invalid for decrypting the data in the main information area 32.
- the main data 44 cannot be decrypted using the second key information 46 located at a predetermined position.
- the encryption can be decrypted by using the first key information 43 which is not at a predetermined position but is recorded in the main information area 32.
- the transfer controller 4 moves the optical pickup 3 to the innermost second sub-information area of the DVD disc 1 by driving the first control means 6 by the second control means 9.
- the optical pickup 3 reads a disc information signal such as a disc type stored in the second sub information area and position information of the first sub information area. This signal is amplified by the amplifier 5, the content is detected by the demodulation means 7, and detected and determined by the disk determination means 14.
- the second 5 The transfer controller 4 is driven by the control means 9 and the first control means 6 to move the optical pickup 3. Then, it reads the disk management information including the key data of the first sub-information area located at the regular place.
- a DVD-R or RW disk which is a DVD disk that can be recorded by a user, is used to encrypt a commercially available DVD disk such as a movie or music.
- the encrypted data information and the key information for decrypting the encrypted data have been produced, the data is encrypted based on the key information copied to the recordable DVD disc. Data information may be decrypted for playback. For this reason, there is a problem that conventional systems cannot effectively prevent illegal use of DVD discs and other optical discs that infringe copyright. Disclosure of the invention
- the present invention has been made to solve the above-mentioned conventional problems, and can effectively and physically or electrically prevent illegal use of DVD discs and other optical discs with infringement of copyright.
- An issue to be solved is to provide an optical disk, an optical disk reproducing device and an optical disk reproducing device, or a method for preventing illegal use of an optical disk.
- An optical disk, an optical disk reproducing apparatus and a duplication apparatus, and an optical disk illegal use prevention method according to the present invention which have been made to solve the above problems, basically include the following elements, or a combination thereof. It is characterized by the following.
- a second sub-information area is provided on the inner peripheral side of the first sub-information area, and the disk management information is divided and stored. 6
- the optical disk reproducing apparatus comprises: (a) a group having a group, a main information area in which encrypted data information is recorded in the group, and an encryption of data information. (B) When reproducing the data information, the data information is recorded on the basis of the disc management information based on the disc management information. (C) determining whether the optical disk is a recordable optical disk based on information other than the disk management information when reproducing the data information.
- the protection mode determining means determines that the data information is protected by the copyright, and the optical disk can be recorded by the disk determining means.
- the optical disk used here is, for example, a write-once optical disk. In this optical disk reproducing apparatus, it is preferable that the disk reproduction prohibiting means prohibits reproduction of the optical disk by prohibiting decryption of data information.
- the disk determining means determines whether (a) a pebble exists in the group and (b) a subgroup in which a predetermined part of the group is connected to the adjacent group in the sub information area. (C) whether there is a code indicating that the optical disc is recordable in another sub-information area different from the sub-information area provided on the optical disc. (D) When at least one of the pebble, the subgroup part, and the code is detected, it is determined that the optical disc is a recordable optical disc. preferable.
- the optical disk copying apparatus includes: (a) a main information area for recording decrypted data information, and disk management information including key information for decrypting the data information.
- the data information recorded on the first optical disc having the sub-information area is copied to a recordable second optical disc by an optical disc duplicator.
- protection mode determination means for determining whether or not the data information is protected by copyright, based on the disc management information when copying the data information; and
- protection mode determination means Means for prohibiting duplication of the data information recorded on the first optical disc to the second optical disc when it is determined that the data information is protected by copyright by It is characterized by
- the optical disk used here is, for example, a write-once optical disk.
- the disk duplication prohibition means prohibits the duplication of the data information by prohibiting the decryption of the data information.
- the optical disc according to the present invention comprises: (a) a main element for recording encrypted data information in a form that can be read out via light on a recording layer of a groove extending along a spiral track. An information area, (b) a first sub-information area located on the inner side of the main information area, and (c) a second sub-information area located on the inner side of the first sub-information area.
- a recordable optical disc provided with: (d) disc management information including key information for decrypting data information is divided into a first sub-information area and a second sub-information area and recorded, The disk management information recorded in the sub-information area of the read-only optical disc is prevented from being copied to the first sub-information area.
- Examples of such an optical disk include a write-once optical disk.
- disc management information including key information for decrypting data information is recorded in a first sub information area, and at least position information of the first sub information area is recorded in a second sub information area.
- the disc management information in the first sub-information area and the disc management information in the second sub-information area are formed by different recording methods.
- the disc management information of the first sub-information area is formed by pre-pits. More preferably, the disc management information in the second sub-information area is formed by laser trimming. Laser trimming can be processed after the disc is completed, so the key of the copyright holder is 8 Information and disc ID information can also be recorded.
- Another optical disc comprises: (a) recording encrypted data information on a recording layer of a group extending along a spiral or spiral track in a form that can be read out via light; (B) a first sub-information area located on the inner side of the main information area, and (c) a second sub-information area located on the inner side of the first sub-information area.
- the recordable optical disk provided with: (d) a first sub-information area is provided with a sub-group portion in which a predetermined part of the group is connected to an adjacent group, so that the sub-information area of the read-only optical disc is provided.
- the recorded disk management information is prevented from being copied to the first sub-information area or the main information area.
- An example of such an optical disk is a write-once optical disk.
- the method for preventing illegal use of an optical disc comprises the steps of: (a) deciphering a main information area having a group, in which encrypted data information is recorded in the group, and the data information; In a method for preventing illegal use of an optical disc having a sub-information area in which disc management information including key information is recorded, (b) when reproducing data information, the data is reproduced based on the disc management information. (C) determining whether or not the optical disk is a recordable optical disk based on information other than the disk management information; and (d) determining whether the information is protected by copyright. When the optical disk is protected by copyright and the optical disk is a recordable optical disk, reproduction of the optical disk is prohibited.
- the optical disk used here is, for example, a write-once optical disk. In this method of preventing illegal use of an optical disk, it is preferable to prohibit reproduction of the optical disk by prohibiting decryption of data information.
- information other than disc management information includes (a) information as to whether or not a pebble exists in the group, and (b) a predetermined portion of the group adjacent to the sub-information area. (C) whether there is a code indicating that the optical disc is recordable in another sub-information area different from the sub-information area; (D) at least one of the cobbles, the subgroup part, and the code; 9
- the optical disk is a recordable optical disk when one is detected.
- Another method for preventing illegal use of an optical disk comprises the steps of: (a) storing a main information area in which encrypted data information is recorded, and disk management information including key information for decrypting a symbol of the data information; A method for preventing illegal use of an optical disc when duplicating data information recorded on a first optical disc having a recorded sub-information area onto a second recordable optical disc, comprising the steps of: Based on the management information, it is determined whether or not the data information is protected by a copyright. (C) When the data information is protected by the copyright, the data recorded on the optical disk is transferred to a recordable optical disk. It is characterized by prohibiting the copying of The optical disk used here is, for example, a write-once optical disk.
- Still another method for preventing illegal use of an optical disk according to the present invention is as follows.
- (A) A method for encrypting an optical disk on a recording layer of a group extending along a spiral track in such a manner that it can be read out via light.
- a main information area for recording data information a first sub-information area located on the inner side of the main information area, and a second sub-information area located on the inner side of the first sub-information area.
- the disk management information of the first sub-information area is formed in advance by pre-pits, so that (c) or a predetermined portion of the group is assigned to an adjacent group.
- the disc management information recorded in the first sub-information area of the read-only optical disc is copied to the first sub-information area of the recordable optical disc.
- Ru der which is characterized in that that summer to prevent the. Examples of the optical disk used here include a write-once optical disk.
- Still another method for preventing illegal use of an optical disk comprises the steps of: (a) encrypting a recording layer of a group extending along a spiral track in a form that can be read out via light; Main information area for recording the recorded data information, a first sub-information area located on the inner side of the main information area, and a second sub-information area located on the inner side of the first sub-information area.
- (B) By pre-forming the disc management information of the first sub-information area by pre-pits, or by adding a sub-group that connects a predetermined portion of the group to an adjacent duplicate in the first sub-information area.
- the disc management information recorded in the first sub-information area of the read-only optical disc is prevented from being copied to the first sub-information area of the recordable optical disc.
- C When reproducing data information recorded on the recordable optical disc, the data information is protected by copyright based on the disc management information recorded in the first sub-information area.
- D when the data information is protected by copyright, the reproduction of the optical disc is prohibited.
- the optical disk used here is, for example, a write-once optical disk. In this method of preventing illegal use of an optical disc, it is preferable to prohibit the reproduction of the optical disc by prohibiting the decoding of the signal of the data information.
- the illegal use of the DVD disc and other optical discs with the infringement of the copyright is physically or electrically controlled. Can be effectively prevented.
- FIG. 1 is a block diagram of a DVD playback device according to the first embodiment of the present invention.
- FIG. 2 is a block diagram of a DVD playback device according to the second embodiment of the present invention.
- FIG. 3 is a block diagram of the DVD playback device according to the third or fourth embodiment of the present invention.
- FIG. 4 is a block diagram of the DVD playback device according to the fifth embodiment of the present invention.
- FIG. 5 is a partial cross-sectional perspective view of a DVD disk provided with a wobble.
- FIG. 6 is a partial cross-sectional perspective view of a DVD disk having a sub-groove section.
- FIG. 7A is a plan view of a DVD disk provided with a disk determination code, and
- FIG. 7B is a side view of the DVD disk shown in FIG. 7A.
- FIG. 8 is a partially sectional perspective view of a DVD disk provided with prepits.
- FIG. 9 is a diagram showing a recording structure of a commercially available DVD disc.
- FIG. 10 is a diagram showing the recording structure when the contents of a commercially available DVD disc are copied to a recordable DVD disc together with key information.
- FIG. 11 is a block diagram of a conventional DVD playback device.
- FIG. 12 is a perspective view of a conventional DVD disk. BEST MODE FOR CARRYING OUT THE INVENTION
- the first embodiment will be described with reference to FIGS. 1 and 5, taking a case of reproducing a DVD disc as an example.
- it is determined whether or not a DVD disk to be reproduced is a recordable DVD disk based on the presence or absence of a wobble.
- FIG. 1 is a block diagram showing a configuration of a DVD playback device according to the present invention.
- reference numeral 1 denotes a DVD disc, which records video and audio data information to be reproduced.
- data information is generally recorded in an encrypted form in order to protect the copyright from unauthorized duplication. Therefore, key information for decrypting the data is also specified on DVD disc 1. Area.
- Reference numeral 3 denotes an optical pickup, which reads a recording signal of the DVD disk 1 using a laser beam.
- Reference numeral 4 denotes a transfer controller which moves the optical pickup 3 in the radial direction of the DVD disc 1 in order to read a recording signal at an arbitrary position on the DVD disc 1.
- Reference numeral 2 denotes a disk monitor for rotating the DVD disk 1.
- Reference numeral 6 denotes first control means for controlling the optical pickup 3, the transfer controller 4, and the disk motor 2.
- Reference numeral 5 denotes an amplifier, which amplifies the signal read by the optical pickup 3.
- Reference numeral 7 denotes a demodulation unit that analyzes a read signal from the digitized DVD disk 1 and reconstructs data such as original video and music.
- Reference numeral 10 denotes a wobble detection unit, which generates and detects a wobble signal obtained from a focus error signal, a tracking error signal, and the like. The specific configuration of the cable will be described later (see FIG. 5).
- Reference numeral 9 denotes a second control unit.
- 12 means for disc determination 14 to be activated.
- the protection mode determination means 13 extracts and determines a code indicating the presence or absence of copyright protection from the disc management information in the demodulated detection signal.
- the disc determination means 14 determines whether or not the DVD 1 is a recordable DVD based on the presence or absence of the wobble signal.
- Reference numeral 15 denotes a reproduction prohibiting means.
- the data information of the DVD disk 1 is the data information protected by the copyright in accordance with the judgment results of the protection mode judging means 13 and the disc judging means 14 and the DVD disc.
- 1 is a recordable DVD disc, the output of the demodulated signal of the data information from the output means 8 is prohibited.
- FIG. 5 is a partial cross-sectional perspective view of a write-once DVD disc provided with a wobbled disk.
- the groove 21 (groove) or the track (spiral) formed on the surface of the substrate 20 is meandering.
- the meandering state is the pebble 23.
- a land portion 22 is formed between adjacent grooves 21 as viewed in the disk radial direction.
- the DVD playback device detects whether or not the disk 23 exists in the group 21 and when the disk 23 is detected, the DVD disc 1 can record. It is determined that the disc is an optical disc, and if the data information is protected by copyright, the reproduction of the disc is prohibited. Can be effectively prevented.
- Embodiment 2 will be described with reference to FIGS. 2 and 6, taking a case of playing back a DVD disc as an example.
- it is determined whether or not a DVD to be reproduced is a recordable DVD according to the presence or absence of a subgroup portion. Note that the basic parts in FIGS. 2 and 6 are the same as those in FIGS. 1 and 5, respectively. Description is omitted.
- the cobble detecting means 10 as in the first embodiment is not provided, but a subgroup part detecting means 11 is provided instead. Then, the sub-group part detecting means 11 is provided with a focus error signal and 13 Generate and detect signals from the subgroup obtained from tracking error signals.
- Other configurations are the same as those of the DVD playback device according to the first embodiment (FIG. 1). The specific configuration of the subgroup will be described later (see FIG. 6).
- the second control means 9 outputs the signal from the protection mode determination means 13 to which the signal from the demodulation means 7 is input and the signal from the sub-groove part detection means 11. And disc determination means 14 to be inputted.
- the protection mode determining means 13 extracts and determines a code indicating the presence or absence of the copyright protection from the disk management information in the demodulated detection signal, and the disk determining means 14 determines whether or not the code is from the sub-gain section.
- the presence or absence of a signal determines whether the DVD disk is a recordable DVD disk.
- the playback prohibition means 14 receives the determination result of the protection mode determination means 13 and the disc determination means 14, and is the data information protected by the copyright, and in the case of a recordable DVD disc, the data information. Output from the output means 8 is prohibited.
- the optical pickup moves to the adjacent group via the subgroup in response to the control signal from the tracking error signal.
- FIG. 6 is a partially sectional perspective view of a write-once DVD disc having a subgroup portion. As shown in FIG. 6, in the DVD disc 1b, a sub-region connecting a predetermined portion of a certain group 21 and an adjacent group 21 on the inner peripheral side is provided on the surface (sub-information area) of the substrate 20. A group part 24 is formed. In this DVD reproducing apparatus, whether or not the DVD disk is a recordable DVD disk is determined based on the presence or absence of the subgroup section 24.
- the recording device or the duplication device provided a sub-groove in front of the management information area to prevent copying of key information, etc., so that the key information could not be read, and was provided in the original group after passing through a certain area. Movement by another subgroup or track jump can enhance the copy protection function.
- the presence or absence of the subgroup portion 24 is detected, and when the subgroup portion 24 is detected, the optical disc on which the DVD 1 can be recorded is detected. And the data information is authoritative. 14 Since the reproduction is prohibited when protected by copyright, illegal use of DVD discs that infringes copyright can be effectively prevented physically or electrically.
- the third embodiment will be basically described with reference to FIGS. 3 and 7, taking a case of playing a DVD disc as an example.
- the DVD disc can be recorded in a second sub-information area (inner side than the first sub-information area) different from the first sub-information area (normal sub-information area).
- Whether or not a DVD disc to be played is a recordable DVD disc is determined based on whether or not a code indicating that the disc is a DVD disc (hereinafter referred to as a “disc determination code”) is present. I have to. Note that, since the basic part of FIG. 3 is common to FIG. 1, in order to avoid repetition of description, the same elements or members are denoted by the same reference numerals, and description thereof will be omitted.
- the third embodiment based on a signal input from the disc determination means 14 and the demodulation means 7 constituting the second control means 9, It is determined whether or not there is a disc determination code indicating that the DVD disc is a recordable DVD disc.
- Other configurations are the same as those of the DVD playback device according to the first embodiment (FIG. 1). The specific configuration of the second sub information area will be described later (see FIG. 7).
- the protection mode determination means 13 constituting the second control means 9 uses the code indicating the presence or absence of copyright protection from the disc management information in the demodulated detection signal.
- the disc judgment means 14 judges whether or not the DVD disc is a recordable DVD disc based on the presence or absence of the disc judgment code.
- the reproduction prohibition means 14 receives the results of the determination by the protection mode determination means 13 and the disk determination means 14, and is the data information protected by copyright, and in the case of a recordable DVD disc, the data information. The output of the demodulated signal from the output means 8 is prohibited.
- FIG. 7A and 7B are a plan view and a side view of a write-once DVD disc having a second sub-information area, respectively.
- this DVD 15 disk 1c a main information area 26 for recording encrypted data information in a form that can be read out via light on a recording layer of a group extending along a spiral track;
- a first sub-information area 27 located on the inner peripheral side of 26 and a second sub-information area 28 located on the inner peripheral side of the first sub-information area 27 are provided.
- Disk management information including key information for decrypting information is divided into first and second sub-information areas 27 and 28 and recorded.
- a disc determination code (for example, a bar code) indicating that the DVD disc is a recordable DVD disc, and position information of the first sub-information area 27 are stored in the second sub-information area 28. Etc. are formed.
- this DVD reproducing apparatus it is determined whether or not the DVD disk is a recordable DVD disk based on the presence or absence of the disk determination code.
- the DVD playback device detects whether or not the disc determination code exists in the second sub-information area 28, and when the disc determination code is detected, the DVD Disc 1 is determined to be a recordable optical disc, and if its data information is protected by copyright, its reproduction is prohibited, so illegal use of DVD discs with copyright infringement Can be effectively prevented physically or electrically. Furthermore, if an unauthorized first sub-information area is recorded in the main information area, disc management information such as key information may be copied illegally, and the symbol data may be demodulated. By reading the surrounding second sub-information area first, in the present invention, the position of the regular first sub-information area can be determined, so that illegal copying can be prevented. Note that key information may be recorded in the second sub-information area.
- the fourth embodiment will be described with reference to FIG. 3 and FIG. 8 as an example of a case where a DVD disc is played.
- it is determined whether or not a DVD disc to be reproduced is a recordable DVD disc based on whether or not a pre-pit exists in the sub information area.
- the fourth embodiment based on the signal input from the disk determination means 14 constituting the second control means 9 It is designed to determine whether there are 16 lipids.
- Other configurations are the same as those of the DVD playback device according to the first embodiment (FIG. 1). The specific structure of the prepit will be described later (see Fig. 8).
- the protection mode determination means 13 constituting the second control means 9 indicates the presence or absence of the copyright protection from the disc management information in the demodulated detection signal.
- the code is extracted and determined, and the disk determination means 14 determines whether the DVD disk is a recordable DVD disk based on the presence or absence of prepits and the prepit information.
- the reproduction prohibition means 14 receives the results of the protection mode determination means 13 and the disc determination means 14 and, if the data is copyright-protected data and is a recordable DVD disc, the data prohibition means 14 The output of the demodulated signal from the output means 8 is prohibited.
- FIG. 8 is a partial cross-sectional perspective view of a write-once DVD disc having pre-pits. As shown in FIG. 8, in this DVD disc 1 d, prepits 29 are provided in the sub information area of the substrate 20. In this DVD reproducing apparatus, whether or not the DVD disk is a recordable DVD disk is determined based on the presence or absence of the pre-pit 29.
- the DVD reproducing apparatus detects whether or not the pre-pit 29 is present in the sub-information area, and when the pre-pit 29 is detected, the optical disc on which the DVD 1 can be recorded. And if the data information is protected by copyright, the reproduction is prohibited.Therefore, illegal use of the DVD disc, which infringes copyright, is prohibited by physical or electrical Can be effectively prevented.
- the fifth embodiment will be basically described with reference to FIG. 4 by taking a case of reproducing a DVD disc as an example.
- it is determined whether or not a DVD disk to be played is a recordable DVD disk based on a plurality of elements of the wobbles, the sub-double section, the disk determination code, and the pre-pits. I am trying to do it.
- the basic parts in FIG. 4 are the same as those in FIG. 1, so that elements or members common to both are denoted by the same reference numerals in order to avoid repetition of the description. 17 Omit.
- a cobble detecting means 10 is provided as in the case of the first embodiment, and a subgroup part detecting means 1 is provided as in the case of the second embodiment. 1 is provided. Further, as in the case of the third and fourth embodiments, it is possible to determine the presence or absence of a disk determination code and a pre-pit, which are disk determining means 14 constituting the second control means 9. Other configurations are the same as those of the DVD playback device (FIG. 1) according to the first embodiment.
- the DVD disc 1 is determined based on a plurality of elements including presence / absence of a copy, presence / absence of a sub-glue, presence / absence of a disc determination code, and presence / absence of a pre-pit. Is determined as to whether it is a recordable optical disk, and therefore, compared to the first to fourth embodiments, the accuracy of the determination of the type of the disk is increased, and copyright infringement of the DVD disk is increased. Illegal use can be more effectively prevented.
- the optical disc in the optical disc, whether or not there is a pebble in the group and whether or not there is a subgroup part in which the predetermined portion of the dub is connected to the adjacent group in the sub information area And whether or not there is a code indicating that the optical disc is recordable in the second sub-information area different from the normal sub-information area. If at least one of the part and the code is detected, it is determined that the optical disk is a recordable optical disk, and if the data information is protected by copyright, the reproduction or duplication is prohibited. In this way, illegal use of optical discs that infringes copyright can be effectively prevented physically or electrically.
- the optical disc, the optical disc reproducing apparatus and the duplication apparatus, and the method for preventing the illegal use of the optical disc according to the present invention effectively and physically prevent the illegal use of the DVD disc and other optical discs. It is useful as an optical device that can be used as a medium, and is particularly suitable for use as a means of distributing copyrighted works such as video and audio while protecting copyright.
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/582,727 US6992959B1 (en) | 1998-11-02 | 1999-11-02 | Optical disk, method of reproducing and copying optical disk, and method of preventing illegal use of optical disk |
EP99951206A EP1067544A4 (en) | 1998-11-02 | 1999-11-02 | OPTICAL DISC, METHOD FOR REPRODUCING AND COPYING AN OPTICAL DISC, AND METHOD FOR PREVENTING THE ILLEGAL USE OF AN OPTICAL DISC |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10312222A JP2000149415A (ja) | 1998-11-02 | 1998-11-02 | 光ディスク、光ディスクの再生装置及び複製装置並びに光ディスクの違法使用防止方法 |
JP10/312222 | 1998-11-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000026912A1 true WO2000026912A1 (fr) | 2000-05-11 |
Family
ID=18026663
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1999/006102 WO2000026912A1 (fr) | 1998-11-02 | 1999-11-02 | Disque optique, procede de reproduction et de copie d'un disque optique, et procede de prevention de l'usage illegal d'un disque optique |
Country Status (7)
Country | Link |
---|---|
US (1) | US6992959B1 (ja) |
EP (1) | EP1067544A4 (ja) |
JP (1) | JP2000149415A (ja) |
KR (1) | KR100371672B1 (ja) |
CN (1) | CN1331143C (ja) |
TW (1) | TW484133B (ja) |
WO (1) | WO2000026912A1 (ja) |
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JP2004288271A (ja) * | 2003-03-20 | 2004-10-14 | Pioneer Electronic Corp | 情報処理装置、その方法、そのプログラム、そのプログラムを記録した記録媒体、および、再生装置 |
JP3972256B2 (ja) | 2003-08-25 | 2007-09-05 | ソニー株式会社 | 光ディスク駆動装置および方法、記録媒体、並びにプログラム |
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US7746746B2 (en) * | 2004-11-16 | 2010-06-29 | Hewlett-Packard Development Company, L.P. | Optical media with control data in wobble |
JP4810572B2 (ja) * | 2006-05-30 | 2011-11-09 | パイオニア株式会社 | 記録可能型情報記録媒体、情報記録装置および情報記録方法 |
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US6614749B2 (en) | 1999-05-21 | 2003-09-02 | Matsushita Electric Industrial Co., Ltd. | Recordable optical disk |
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US6597654B2 (en) | 1999-05-21 | 2003-07-22 | Matsushita Electric Industrial Co., Ltd. | Recordable optical disk |
US6603731B2 (en) | 1999-05-21 | 2003-08-05 | Matsushita Electric Industrial Co., Ltd. | Recordable optical disk |
US6603732B2 (en) | 1999-05-21 | 2003-08-05 | Matsushita Electric Industrial Co., Ltd. | Recordable optical disk |
US6606290B2 (en) | 1999-05-21 | 2003-08-12 | Matsushita Electric Industrial Co., Ltd. | Recordable optical disk |
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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 |
US7292509B2 (en) * | 2002-04-30 | 2007-11-06 | Pioneer Corporation | Recording disc and apparatus and method for reproducing recorded information |
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US7688697B2 (en) * | 2002-08-22 | 2010-03-30 | Lg Electronics, Inc. | High-density optical disc and recording/reproducing method thereof |
US8331209B2 (en) | 2002-08-22 | 2012-12-11 | Lg Electronics Inc. | High-density optical disc and recording/reproducing method thereof |
US7649819B2 (en) | 2003-02-27 | 2010-01-19 | Lg Electronics Inc. | High-density recording medium and method and apparatus for controlling data playback thereof |
US7978582B2 (en) | 2003-02-27 | 2011-07-12 | Lg Electronics Inc. | High-density recording medium and method and apparatus for controlling data playback thereof |
Also Published As
Publication number | Publication date |
---|---|
CN1331143C (zh) | 2007-08-08 |
JP2000149415A (ja) | 2000-05-30 |
KR20010033803A (ko) | 2001-04-25 |
CN1287668A (zh) | 2001-03-14 |
TW484133B (en) | 2002-04-21 |
EP1067544A4 (en) | 2002-01-16 |
EP1067544A1 (en) | 2001-01-10 |
US6992959B1 (en) | 2006-01-31 |
KR100371672B1 (ko) | 2003-02-12 |
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