WO2004061832A1 - マスタリング装置、ディスク製造方法、ディスク状記録媒体、ディスク再生装置、ディスク再生方法 - Google Patents
マスタリング装置、ディスク製造方法、ディスク状記録媒体、ディスク再生装置、ディスク再生方法 Download PDFInfo
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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
- 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
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
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- 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
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- G—PHYSICS
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- 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
- G11B20/00586—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 physical format of the recording medium
- G11B20/00601—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 physical format of the recording medium wherein properties of tracks are altered, e.g., by changing the wobble pattern or the track pitch, or by adding interruptions or eccentricity
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- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/005—Reproducing
- G11B7/0053—Reproducing non-user data, e.g. wobbled address, prepits, BCA
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- 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
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- 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
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- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
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- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
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- G11B7/261—Preparing a master, e.g. exposing photoresist, electroforming
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- 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
- G11B20/00405—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 by varying characteristics of the recording track, e.g. by altering the track pitch or by modulating the wobble track
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- G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
- G11B23/28—Indicating or preventing prior or unauthorised use, e.g. cassettes with sealing or locking means, write-protect devices for discs
Definitions
- the present invention relates to a mastering device for performing mastering of a book on a disc-shaped recording medium such as a CD (Compact D1isc) or a DVD (Digital Versatile Disc), and a disc such as a CD or DVD by performing such mastering.
- the present invention relates to a disk manufacturing method for manufacturing a disk-shaped recording medium.
- the present invention relates to a disk-shaped recording medium such as a CD or a DVD, and a disk reproducing apparatus for reproducing the disk-shaped recording medium.
- an IFPI International Federation
- a signal used by a user such as a TOC (Table Of Contents)
- TOC Table Of Contents
- information used by a user such as an audio signal is conventionally regarded as the first information, and the first information is protected by copyright protection.
- the superimposition recording of the information of No. 2 is performed.
- a singular pit sequence that is configured by arranging a part of a large number of information pits such that the center line thereof is displaced in the radial direction is conventionally used as an information trajectory.
- a plurality of optical discs have been proposed which are periodically and intermittently arranged in units of tabs of recording signals on a disc.
- a light pit with an unauthorized copy prevention function characterized in that the light pit has a displacement pit row in which the information pit row is displaced in a track radial direction from a center line of the information pit row.
- a data recording medium in which the first data is recorded by repeating pits and land sequentially with a length that is an integral multiple of the length corresponding to a predetermined basic cycle. Due to the displacement from the track center force in the direction intersecting the track direction of the pit, the second data is recorded, and the displacement is off-track.
- a data recording medium characterized by being within a predetermined amount within a range not to be affected (see Japanese Patent Application Laid-Open No. 2000-224929).
- a recording track is composed of a continuous land or a groove, and a pit is formed on the recording track based on the main data, whereby the above-described recording track is formed.
- a pit formed at a predetermined distance on the recording track is moved to the center of the recording track in the traffic direction based on the additional data. Displacement by a predetermined amount in the direction perpendicular to the line.
- the displacement amount is from 20 nm to 1 nm. It is stated to be in the range of 100 nm.
- wobble will record the second information.
- Information recording by such a wobble is a technology that can be realized only in a mastering device that exposes an optical disc master. That is, information recorded by a quoble cannot be recorded by a write-once device such as a CD-R. Therefore, if the information of the wobbles is recorded on the master disc and the presence or absence of the information is checked during reproduction, the improper disc copied by a write-once device such as a CD-R is eliminated. It becomes possible to do.
- the amount of a pebble is set to 2 O nm to 10 O nm, so that a relatively large It was necessary to create discs by volume. At such a large displacement, the presence of the pebble can be confirmed by observing it with an electron microscope or the like-so that the contents of the pebble are analyzed and illegal copying is possible. There was a problem of high risk.
- the actual optical disc reproducing device is The servo is designed to position the optical spot at the center of the wobble. For this reason, when the wobble area is lengthened as described above, the amplitude of the wobble detection signal gradually decreases with the movement of the spot, and the wobble detection is performed at the position where the movement of the optical spot is completed. The signal amplitude can hardly be obtained.
- the present applicant has previously proposed a further improvement, that is, the main data is recorded by the pit length and interval in the direction along the track.
- An optical disc characterized in that a sub-telemeter is recorded by displacement of the pit in the inner and outer peripheral directions based on a track center of the track.
- the pitch is displaced in accordance with the result of the arithmetic processing between the sub-terminal and a predetermined binary sequence (Japanese Patent Application Laid-Open No. 2000-2000).
- the integrated detection when detecting the information recorded by the wobbles, the integrated detection is performed using a predetermined binary sequence.
- 1 bit of the copyright protection information is assigned to one frame of the CD and recorded.
- One frame has a length on the disk corresponding to 12 mm, and by integrating and detecting the reproduced signal in such a long section, a relatively small amplitude is obtained. It is possible to sufficiently detect even recorded wobbles.
- the clock may shift (bit slip). There is.
- the present invention in order to solve the above-mentioned problems, when recording copyright protection information for preventing unauthorized copying of CDs, DVDs, and the like as a record, such a record is used.
- the purpose of the present invention is to make it possible to keep the modulation amount sufficiently small and to be able to read this reliably.
- the first digital information is recorded by irradiating a laser beam to the disc master and recording the pit sequence, and the pit sequence is recorded.
- the mastering device that records the second digital information at the same time by making it possible, the following configuration is adopted.
- a first signal generating means for generating the first signal by changing the first digital information in accordance with a required format, and a relative signal from a synchronization signal included in the first signal.
- Bit selecting means for allocating a plurality of bits constituting the second digital information within the same unit section of the synchronization signal according to the position m., And according to the output of the vector selecting means.
- a wobble modulating means for wobbling the pit row in both the positive and negative directions.
- the first digital information is recorded by irradiating a laser beam to the disc master to record the pit row, and the pit row is wobbled.
- a disk manufacturing method for manufacturing a disk-shaped recording medium by simultaneously recording the second digital information and performing mastering is as follows. It was decided to.
- a first signal generation procedure for generating a first signal by modulating the first digital information according to a required format, and a synchronization information included in the first signal.
- a bit selection procedure for allocating a plurality of bits constituting the second digital information within a unit section of the same synchronization signal in accordance with the relative position of the same, and according to the output of the bit selection means described above.
- a double modulation procedure for wobbling the pit row in both positive and negative directions.
- the first digital format is set in accordance with a required format.
- the first signal generated by the modulation of the bit information is recorded by the length and interval of the pit, and the position of the pit is also tracked.
- a disc-shaped recording medium on which the second digital information is recorded is configured as follows.
- a plurality of bits constituting the second digital information are allocated within the same synchronization signal section, and the allocation is performed.
- the pit position is displaced in both the positive and negative directions in accordance with the set bit.
- the disc reproducing apparatus is configured as follows.
- the first digital information is modulated according to a required format to obtain a first signal recorded on a disc-shaped recording medium by a pit length and an interval.
- a plurality of signals for integrating the second digital information read by the second reading means in accordance with a relative position from a synchronization signal included in the first signal read by the second reading unit By determining the outputs of the integrating means and the plurality of signal integrating means, a plurality of the second digital information can be obtained within a unit section of each synchronous signal as the second digital information. Decision means for decoding the bits of It was in the jar by.
- the following method is used as a disc reproducing method. That is, the first digital information is modulated according to a required format to obtain a first signal recorded on a disc-shaped recording medium by a pit length and an interval. And a second reading step of reading the second digital information recorded by being superimposed on the first signal by the above-mentioned pittable, and further performing the second reading step.
- the integration of the second digital information read by the second reading procedure is performed in accordance with the relative position from the synchronization signal included in the first signal read by the first reading procedure.
- the second digital signal is generated within a unit section of each period signal as the second digital information. Implements the decision procedure to decode multiple bits of information It was a call to.
- a plurality of bits constituting the second digital information are allocated and recorded in a unit section of the same synchronization signal included in the first signal.
- a plurality of bits forming the second digital information are allocated in a unit section of the same synchronization signal and recorded periodically.
- a plurality of bits constituting the second digital information recorded periodically as described above are read a plurality of times for each unit section of the synchronization signal during reproduction, and Then, the information of the bits read in this way is integrated.
- FIG. 1 is a block diagram showing an example of the internal configuration of a master / gang device according to an embodiment of the present invention.
- FIG. 2 is a block diagram showing an example of the internal configuration of the additional modulation circuit 7 provided inside the mastering device according to the embodiment.
- FIG. 3 is a diagram schematically showing the structure of a modulation signal according to the RLL (1-7) PP modulation method.
- FIG. 4 is a diagram showing a configuration example of a synchronization pattern inserted into the modulation signal.
- FIGS. 5A, 5B and 5C show select signals SL for specifying the selection by the fan switch 28 shown in FIG.
- FIG. 6 is a diagram for explaining transition of a value of CT.
- FIGS. 6A, 6B, and 6C similarly illustrate the transition of the value of the select signal SLCT for designating the selection by the fan ⁇ switch 28 shown in FIG. FIG.
- FIG. 7 is a diagram schematically showing an operation when the second information S B is recorded based on the cobble command signal S BW.
- FIG. 8 is a diagram exemplifying a structure of reference information 24 a stored in reference table 24 shown in FIG.
- FIG. 9 is a block diagram showing an example of an internal configuration of a disc reproducing apparatus according to an embodiment of the present invention.
- FIG. 10 is a block diagram showing an example of the internal configuration of the second decoding circuit 41 provided in the disc reproducing apparatus according to the embodiment.
- the disk-shaped recording medium of this example is, for example, a disk such as a CD or DVD, or a high-density disk (bull-disk) recently developed.
- a disk such as a CD or DVD
- a high-density disk (bull-disk) recently developed.
- read-only data is recorded by an emboss pit having a depth of about 4L.
- recording and reproduction are performed with a track pitch of 0.32 ⁇ and a linear density of 0.12 m / hit.
- the processes for manufacturing the above-mentioned discs are roughly divided into the so-called mastering process (mastering process) and the disc-making process (replication process). Divided.
- the mastering process is the process of forming seven metal masters (stampers) to be used in the disc-forming process, and the taste quenching process uses a stamper to create an optical disc that is a duplicate of the stamper. This is a mass production process.
- a so-called mastering in which a photoresist is applied to a polished glass substrate and a pittable is formed on the photosensitive film by exposure to a laser beam, is used. Do.
- predetermined processing such as development is performed, and then information is transferred to a metal surface by, for example, an electrode.
- stampers needed to duplicate disks.
- the stamper is used to transfer information onto a resin substrate by, for example, an injection method or the like, to form a reflective film thereon, and then to process the disk into a required disk form. To complete the final product.
- FIG. 1 is a block diagram showing an example of the internal configuration of a mastering device 1 according to the present embodiment, which performs a mastering process (mastering) in the above-described disk manufacturing process. .
- a disk master 15 is driven to rotate by a spindle motor 14 shown in the figure.
- the rotation of the spindle motor 14 is controlled by a spindle servo circuit 13, and the spindle motor 14 is controlled so as to be driven at a rotation speed corresponding to the rotation control method employed.
- Digital information such as music and video recorded on the disk master 15 is supplied from two first signal sources shown as first information SA.
- the second information SB is supplied from the illustrated second signal source 6 as information for preventing unauthorized copying such as so-called piracy. I'm doing it.
- the second information SB controls, for example, ID information set so as to be unique for each disc master 15, information on a manufacturing plant, manufacturing date, and whether copying is possible.
- Digital information composed of information for
- the first information SA is encrypted and recorded by the encryption circuit 3 described below using the second information SB as key information.
- this allows this second The information SB is used to prevent unauthorized copying.
- the second information SB is composed of 32 bits of data
- Increasing the number of bits more often can complicate decryption and make unauthorized copying more difficult.
- the encryption circuit 3 uses the 32-bit data supplied from the second signal source 6 as the second information SB as the key information, and uses the first signal supplied from the first signal source 2 as the key information.
- Information Encrypt the SA For example, any encryption method such as DES (Data Encryption Standard) may be adopted as this encryption method.
- An ECC (Error Correcting Code) circuit 4 adds an error correction code to the output of the above-mentioned symbol circuit 3 and interleaves the data to which the error correction code has been added. Perform a leave process. As a result, even if a disc created on the basis of the master disc 15 has a missing disc, data can be reliably reproduced. .
- the PP conversion circuit 5 modulates the input data from the ECC circuit 4 according to the RLL (1, 7) PP modulation method (RLL: Run Length Limited / Parity preserve Prohibit rmtr repeated minimum transition run-length). Perform processing.
- the 1-7 PP conversion circuit 5 generates a pit modulation signal SD such that the level 1 and the level 0 change at a period that is an integral multiple of a predetermined period. At this time, the DC component of the bit modulation signal SD is suppressed, and a synchronization pattern is inserted periodically. It becomes the thing.
- the additional modulation circuit 7 detects the synchronization pattern from the bit modulation signal SD on which the RLL (1-7) PP modulation has been performed, and performs timing synchronization, thereby converting the second information SB into both positive and negative polarities. It is configured to convert it into a wobble command signal SBW. Then, the thus obtained wobble command signal SBW is output to the optical deflector 9 as shown in the figure.
- the recording laser 8 is composed of, for example, a gas laser or the like, and emits a laser beam LO to an optical deflector (AOD) 9.
- AOD optical deflector
- the optical deflector 9 includes an electro-acoustic optical element (Acoustic Optical Deflector) and the like.
- the optical deflector 9 controls the traveling direction of the laser beam LO incident from the recording laser 8 by a cobble command signal SBW supplied from the additional modulation circuit 7 described above. And emitted as a laser beam L 1.
- the optical modulator 10 is composed of an electro-acoustic modulator (Acoustic Optical Modulator) or the like. According to the level of the pit modulation signal SD supplied from the 1-7 PP conversion circuit 5, the laser beam L 1 is turned on / off at high speed and output as laser beam L2.
- Acoustic Optical Modulator Acoustic Optical Modulator
- the optical path of the laser beam L 2 is bent by the mirror 11 shown in the drawing at an angle to be emitted to the recording surface of the master disk 15, and passes through the objective lens 12. The light is focused on the recording surface of the master disc 15.
- the mirror 11 and the objective lens 12 are configured to be sequentially moved in the radial direction of the disk in synchronization with the rotation of the disk master 15 by a thread mechanism (not shown). You. That is, the condensing position of the laser beam L2 is sequentially shifted, for example, in the outer circumferential direction of the disk master 15 so that the disk master 15 is swirled. A track (pit row) is formed in the shape.
- the length and the interval of the pit row correspond to the pit modulation signal SD.
- the position of the pit in the direction orthogonal to the track (the wobbled) is displaced in accordance with the wobbled command signal SBW.
- the disc master 15 exposed by the mastering apparatus 1 as described above is developed and subjected to a plating process as described above, whereby a stamper is formed. Is generated as The stamper is used to transfer information onto a resin substrate, generate a reflective film thereon, and then process the disk into a required disk form. Thus, a disk 100 in the form of is generated.
- FIG. 2 shows an example of the internal configuration of the additional modulation circuit 7 described above.
- the pit modulation signal SD is a signal output from the 17 PP conversion circuit 5 shown in FIG. 1, and as shown in FIG. SD is input to a synchronization pattern (FS) detection circuit 20 in the additional modulation circuit 7.
- FS synchronization pattern
- the first information S A that has been subjected to the RLL (1-7) PP modulation processing is input to the synchronization pattern detection circuit 20.
- FIG. 3 is a diagram schematically illustrating the configuration of a signal recorded on disk 100 (disk master 15) in the present embodiment.
- a pit row is recorded on the disk 100 on a spiral or concentric circle.
- the pit sequence recorded here is divided into units called blocks of a predetermined length.
- Each block has an error correction code and address information added to it, making it the minimum unit from which data can be read independently.
- Each block is divided into six frames named "Frame 5" from “Frame 0" as shown in Fig. 3 (b).
- Fig. 3 (c) different synchronization patterns are added at the beginning of each of these frames, and the frame number can be determined based on the type of these synchronization patterns. I'm wearing Furthermore, as shown in FIG. 3 (c), each synchronization pattern is configured so that 220 bytes of data follow.
- a pattern having a 30-bit length as described in Japanese Patent Application Laid-Open No. 2000-68846 is used. are doing.
- this synchronization pattern As an example of this synchronization pattern, as shown in Fig. 4, for example, different synchronization patterns are used for six different frames (FS0 to FS5 in the figure).
- the fixed pattern in which the first 24 bits of the 30 bits forming the synchronous pattern are used as a sync body is divided. Have been assigned.
- the bit indicated by “#” in the figure is determined according to the value of the immediately preceding bit, and is followed by the inversion of “0 1 0” followed by the 9T – 9T inversion interval.
- Each of the frames F S0 to F S5 can be identified.
- the synchronization pattern detection circuit 20 has six types of synchronization patterns (FS 0) included in the bit modulation signal SD as described above.
- the synchronization pattern detection circuit 20 activates the reset pulse RS at the timing when the synchronization pattern is detected, and outputs the first counter 22 and the second counter 2. V-count 3 counts. As a result, the first counter 22 and the second counter
- V is set, and the value is sequentially increased.
- the second counter 23 starts counting from the count value “0” and outputs the value in units of channel lock. The count value is increased, and as the count value becomes a predetermined value, the reproduction count value is increased.
- the predetermined value is
- ⁇ 16 4 J is set, and the second counter 23 is a 16-th power counter.
- the first counter 22 is configured so that each time the power count value of the second counter 23 overflows and returns to “0”, only one power count is performed. I have.
- the output PN of the first counter 22 shown in the figure is reset to “0” immediately after the synchronization pattern, and after that, the value becomes 165 clocks, and so on. It will be incremented by one.
- the reference tape hole 24 is provided with a memory element such as a ROM (Read Only Memory).
- ROM Read Only Memory
- the frame number information FN supplied from the illustrated latch 21 and the value of the output PN for the first counter 22 are stored.
- Reference information 42a for outputting a predetermined select signal SLCT is stored.
- the reference table 24 stores the frame number information F
- the select signal S LCT output with reference to this reference information 24a based on the N and the above output PN is converted to the analog switch 2 shown in the figure.
- the structure of the reference information 24a stored in the reference table 24 will be described later.
- the second information SB shown in FIG. 1 is input to the caro circuit 25 with a CRC (Cyclic Redundancy Check).
- the CRC adding circuit 25 is composed of a flip-flop and an exclusive OR, etc., and adds a CRC code to the second information SB input above.
- the CRC addition circuit 25 receives the second information SB composed of 32 bits and adds a 16-bit CRC code for error detection.
- the second information SB composed of 32 bits and adds a 16-bit CRC code for error detection.
- S B is assumed to be a total of 48 bits of information (B 0 to B 47).
- the copyright protection information (second information SB) B0-: B47 with the CRC code attached as described above and made into 48 bits is represented by a signal parallel parallel (as shown in the figure). SP) Input to the conversion circuit 26.
- the serial-parallel conversion circuit 26 of- is composed of flip-flops and the like, and inputs 48-bit information to be input into one bit.
- Each of the non-inverting amplifiers 27 A (0 to 47) outputs a voltage of “10 Vw” when the input signal is ⁇ 1 ”, and outputs a voltage of ⁇ 0” when the input signal is ⁇ 0 ”. Is configured to output a voltage of "1 Vw"
- each inverting amplifier 27 B (0 to 47) outputs a voltage of “1 Vw” when the logic of the input signal is “1”, and the logic of the input signal is “1 Vw”. In the case of "0", it is configured to output the voltage of "+ Vw”.
- each of the input 1-bit digital signals (B0 to B47) It is to be converted into two analog signals (+ Vw, -Vw).
- this value is the non-inverting amplifier 27A-0 and the inverting amplifier 27B-0.
- two analog signals of “+ V w” output as “B 0A” and “1 V w” output as “: B 0B” are shown. It is converted to and output. Note that the voltage Vw directly affects the amplitude of the cobbles as described later.
- the amount of displacement of the cobbles is set to, for example, 5 nm or less. For this reason, it is assumed that the voltage Vw is adjusted to such a level that the displacement of the diode is set to 5 nm or less in this way.
- the analog switches 28 are connected to the respective non-inverting amplifiers 27 A (0
- select 1 signal based on the value of select signal SLCT supplied from lookup table 24 described above.
- FIGS. 5A, 5B, 5C, 6A, 6B, and 6C show select signals for specifying the selection by the analog switch 28 shown in FIG.
- FIG. 9 is a diagram for explaining a transition of a value of SLCT. Note that Fig. 5A, Fig. 5B, Fig. 5C, Fig. 6A, Fig. 6B, Fig. 6 In C, each frame of FSO to FS6 forming one block shown in FIG. 4 is schematically shown.
- the synchronization shown in Fig. 2 is performed. Depending on the pattern detection circuit 20, this frame sink will be detected. At this time, as described above, in the present embodiment, there are six different frames (FS0 to FS5), and the frame detected by the synchronous pattern detection circuit 20 is used. Recognition of the sink ID of the musk is recognized. Then, along with this, the latch 21 outputs the value of the frame number information FN thus recognized by the synchronous northern detection circuit 20 in the lookup table 24. Will be output.
- the reset pulse RS is also output from the synchronization pattern detection circuit 20, and in response to this, the first counter 22 is output. Is reset to "0". That is, as the value of the output PN of the first counter 22, “0” is output to the lookup table 24. Further, at this time, the count value of the second counter 23 is also reset to "0" according to the reset noise RS. Then, in the second force counter 23, the counting by the hexadecimal system according to the channel clock described above is started.
- the first counter 22 counts each time the force count value of the second counter 23 goes round (changes the channel clock force S 165 times). Increment the value by one.
- the value of the output PN of the first counter 22 is one increment for each one of the above-mentioned one-frame clocks “2640”. Therefore, in this case, the value of the output PN becomes 0 to 1 as shown in FIG.
- the output PN having a value of 0 to 15 and the frame number information FN output from the latch 21 are input to the reference template 24. Accordingly, in the reference table 24, a predetermined select signal SLCT based on the output PN and the frame number information FN is output.
- a plurality of bits constituting the second information SB are allocated in correspondence with a predetermined position in the frame based on a relative time from the time when the synchronization pattern is detected. I have.
- the way of allocating such bits is as follows. 2 Divide the 8-bit information (B0 to B47) that constitutes the information SB into the six frames (FS0 to FS5) that form one block in order. To
- each of these 48-bit information is shown in Figure 2.
- the non-inverting amplifier 27A and the inverting amplifier 27B are converted into two analog signals (outputs), so that 1-bit information consists of two signals. Will be done.
- [B 16A, B 16 ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ 23 ⁇ and ⁇ 23 ⁇ ] are placed in frame FS 2 shown in Fig. 5C, and [ ⁇ 24 ⁇ , ⁇ 24 ⁇ ⁇ ⁇ ⁇ ⁇ 31 ⁇ , ⁇ 31 ⁇ ], and the frame FS 4 shown in Fig. 6 ⁇ ⁇ contains [B 32A, B 32B ⁇ ⁇ ⁇ B 39A, B 39B], and the frame FS 5 shown in Fig. 6C.
- [B 40A, B 40B ⁇ ⁇ ⁇ B 47A, B 47B] The power S is harmful.
- Reference information is provided so that a plurality of bits constituting the second information SB can be allocated to predetermined positions in each frame as described above. 2 4 a is stored.
- Reference table 2 such as-4 Reference information stored internally 2
- FIG. 4a has a structure as shown in FIG. 8, for example.
- this reference information 24a is a combination of the frame number information FN output from the latch 21 and the output PN of the first input counter 22 as shown in the figure. Assign one of the non-inverting amplifier 27A output signal (B0A to B47A) and the inverting amplifier 27B output signal (B0B to B47B) Of and Become.
- the frame number information FN is set so that the signals are allocated in the order shown in FIGS. 5A, 5B, 5C, 6A, 6B, and 6C.
- the signals of [B0A, BOB-B7A and B7B] are divided as shown in Fig. 5A.
- Each signal is assigned in order according to the value of the frame number information FN and the value of the output PN so as to follow thereafter.
- the values of the select signal SLCT output from the reference table 24 are as shown in FIG. 5A, FIG. 5B, FIG. 5C, FIG. 6A, FIG. As shown in FIG. 6C, [B0A, B0B... B47A, B47B] are sequentially selected for every 16.5 clocks.
- the value of the second information SB is obtained as the double command signal SBW output from the analog switch 28.
- An analog signal corresponding to the current is output.
- the wobble command signal SBW as an analog signal thus output is input to the optical deflector 9 as described with reference to FIG. 1, and based on this, the laser beam The traveling direction of L0 is changed.
- the second information SB is to be recorded on the disc master 15 by using a pebble.
- FIG. 7 is a diagram schematically illustrating an operation when the second information SB is recorded by a probe based on the sample command signal SBW in this way.
- the values of the lower bits B0 to B7 of the second information SB are, for example, those shown in FIG. 7 (d).
- the output of the non-inverting amplifier 27 A-0 is approximately “1 V” as described in FIG. w ”
- the output of the inverting amplifier 27B-0 is“ + V w ”.
- the cobble command signal SBW shown in FIG. 7 (e) is the first section in which “B0A” is selected as the value of the select signal SLTC shown in FIG. 7 (c). Outputs a voltage of “1 Vw”, and then outputs “+ Vw” in the section where “: B0B” is selected.
- the output of the non-inverting amplifier 27 A-1 is “+ Vw” and the output of the inverting amplifier 27B_1 is “1”. V w ”. Therefore, in this case, the voltage of “+ Vw” is output in the section in which “: B1A” is selected by the select signal SLTC, and the section in which “B1B” is selected. In between, a voltage of “1 Vw” is output.
- the period during which a positive voltage “+ V w” is output for each bit and the negative voltage “1 V The period during which “w” is output is equal to.
- the non-inverting amplifier 27 A and the inverting amplifier 27 B always set the 1-bit value to “one Vw” and “+ Vw”. Converted into two analog signals and output It depends on what you do.
- the wobble is performed evenly in both the positive and negative polarities, whereby the tracking point is located at the position of the optical spot. Avoid changing things.
- the traveling direction of the laser beam L0 is changed according to the cobbler command signal SBW. Therefore, the pit recorded on the recording surface of the disk master 15 is displaced in a direction orthogonal to the track length direction.
- Fig. 7 (f) the state of this displacement is schematically shown in the example.-In the case where "B1A" is selected by the select signal SLCT signal, the section in which w ”signal is output,
- ⁇ is output as w, so the pit row is displaced by “1 ⁇ ”.
- an optical disc reproducing apparatus 300 that is manufactured using the mastering apparatus 1 described above and reproduces a disc 100 on which the first information SA and the second information SB are superimposed and recorded. Will be described with reference to FIGS. 9 to 10 below.
- FIG. 9 is a block diagram showing an example of the internal configuration of an optical disc reproducing device 30 as an embodiment to which the disc reproducing device of the present invention is applied.
- a disc 100 is a disc-shaped recording medium manufactured by using the mastering apparatus 1, and as will be understood from the description so far, the first information SA and second information SB as copyright protection information formed by the pit row of wobbles as the first information SA are recorded.
- This disc 100 is rotated by a spindle motor 31 shown in the figure.
- the spindle motor 31 and the optical pickup 32 are controlled by the servo circuit 39 to perform predetermined operations.
- the optical pickup 32 converts the light beam reflected from the disc 100 into an electric signal by a plurality of detectors and outputs the electric signal.
- the matrix amplifier (MA) 33 performs a matrix operation on a plurality of electrical signals detected by the optical pickup 32, thereby generating a track error. Generates and outputs signal TK, focus error signal FS, push-pull signal PP, and playback signal HF.
- the track error signal TK and the focus error signal FS are supplied to the servo circuit 39 and used for controlling the focal position of the optical pickup 32 and the like.
- the reproduction signal HF is binarized. By being supplied to the circuit 34, it is used as a pit modulation signal 'SD for detecting information recorded on the disc 100.
- the push-pull signal PP is supplied to a non-pass filter (BPF) 40 to remove unnecessary low-frequency and high-frequency noise components, and then to the second decoding circuit 41. Then, in the second decoding circuit 41, based on the push-pull signal PP, as described above, the second information SB recorded by the pop-up on the disc 100 as described above. Is read out.
- BPF non-pass filter
- the binarizing circuit 34 binarizes the supplied reproduction signal HF to generate a binarized signal BD.
- This binarized signal BD is also supplied to the 17 PP decoding circuit 35, the PLL circuit 38, and the above-mentioned second decoding circuit 35.
- the decoding circuit 35 restores the recorded information by performing an inverse operation of the RLL (1-7) PP modulation, and supplies the restored information to the ECC circuit 36.
- the E C C circuit 36 is the E C C added in the encoding at the time of recording.
- the PLL circuit 38 generates a channel lock CK based on the supplied binary signal BD. Then, the channel lock CK generated in this way is supplied to each part in the figure and used as an operation lock.
- the CRC detection circuit 42 inputs the 48-bit second information SB read out by the second decoding circuit 41, and outputs the information to the CRC addition circuit 25 described in FIG. Error detection is performed based on the code added to the second information SB. If the CRC checker circuit 42 determines that the second information SB is correctly read by the error check, the 48-bit information (B0 to B47) is used. The first 32 bits of the copyright protection information excluding the CRC code (16 bits) are sent to the decryption circuit 37.
- the decryption circuit 37 decrypts the encryption performed at the time of recording using such second information SB, and restores and outputs the first information SA.
- this makes it possible to decrypt the first information SA, which has been encrypted using the copyright protection information as the second information SB as a key, and to normally reproduce the same. It is.
- the CRC check circuit 42 determines that an error is included by the error check, the encryption of the first information SA cannot be correctly canceled. In this case, for example, this is notified to a system controller (not shown), and the system controller controls each unit of the optical disc reproducing apparatus 30 to restart the system. It is sufficient to take measures such as re-detecting the copyright protection information B0 to B47.
- FIG. 10 is a block diagram showing an example of the internal configuration of the second decoding circuit 41 for decoding the second information SB shown in FIG. 9 described above.
- the push-pull signal PP supplied from the band-pass filter 40 shown in FIG. 9 is input to an AD converter 50 shown in FIG. 9 and converted into a digital signal. Then, the digital signal is delayed by a predetermined time by the delay circuit 51, and the digital signal is timed with the binary signal BD.
- the binarized signal BD shown in FIG. 9 is input to a synchronization pattern (FS) detection circuit 58 shown in the figure. This synchronization pattern detection circuit 58 performs the same operation as the synchronization pattern detection circuit 20 shown in FIG.
- the reset pulse RS is activated at the timing when the synchronization pattern is detected as described above, and the counters 60 and 61 shown in the figure are activated. Reset the count value.
- the first counter 60 and the second counter 61 have a value of “0” immediately after the synchronization pattern, and the values sequentially increase. Let's go.
- the first counter 60 and the second counter 61 perform the same operation as that shown in FIG. That is, the second counter 61 is a counter of 16 decimal, and the first counter 60 counts every time the count value of the second counter 61 returns to “0”. This is to make the count value increment by one.
- the reference table 62 performs the same operation as that shown in FIG. That is, a value predetermined according to the frame number information FN and the value of the output PN of the first counter 60 is output as a select signal SLCT shown in the figure.
- the above-mentioned select signal SLCT is input to the analog switch 52 shown in the drawing, whereby the signal SLCT shown in FIGS. Equivalent to the described recording At the timing, one of the signals ( ⁇ 0 ⁇ , B0B, B47A, B47B) input to the analog switch 52 is selected.o In this case, the reference The reference information in the table 6 2 is also equivalent to the reference information 24 a shown in FIG. 8 above.
- the illustrated delay circuit The output of the push-pull signal PP from 51 comes to appear at the “B0A” terminal of the analog switch 52 described above.
- a push-pull signal obtained by reproducing an area in which “B 0B” has been selected and recorded has been obtained.
- the 48-bit information converted into two analog signals at the time of recording, respectively, is used as the push-pull signal input from the delay circuit 51. It can be obtained based on PP.
- Each of the illustrated inverting elements 5 3 — 0 to 5 3 — 47 is connected to the B 0 B to B 47 B terminals of the above analog switch 52, and outputs the signal with its signal polarity inverted. Is configured.
- the signals obtained in this way are respectively added by adders 54-0 to 54-47 shown in the figure, and the signals added in this way are Input to the corresponding digital integration circuit 55 (0 to 47).
- the digital integration circuits 5 5 — 0 to 5 5 — 47 integrate the signals supplied from the corresponding addition circuits 54.
- each digital integrating circuit 55 integrates the signal on which the inversion operation has been performed as described above. That is, for example, when the logic of the recorded bit is “0”, in each integrating circuit 55, only the signal corresponding to the “ ⁇ ” signal is integrated. As a result, the digital integration circuit 55 can obtain a negative value. Conversely, if the bit logic is, for example, “1”, a positive value will be obtained.
- Each judgment circuit 56 (0 to 47) counts the number of times of integration in each of the above digital integration circuits 55, and when the number of times of integration exceeds a predetermined number, the corresponding digital integration circuit Determine the polarity of the circuit 55 output. That is, when the output of the digital integration circuit 55 has a positive polarity, each determination circuit 56 outputs a logic “1”, and when it has a negative polarity, outputs a logic “0”. It is.
- the predetermined value for the number of integrations set in each of the determination circuits 56 is set so that the predetermined value n> 16.
- the above-described digital integration circuit 55 integration operation is repeated until, for example, a reproduced signal having the same frame number information F N is input at least 16 times.
- the second information SB is recorded so as to be completed in a section of six frames (one block shown in FIG. 3).
- the integration operation is repeated until a push-pull signal PP for at least 16 blocks is input. It becomes the thing.
- the digital integration circuits 55 perform integration over at least a period of 16 blocks, and as a result, In the optical disc reproducing device 30 of the embodiment described above, it is possible to remove the influence of noise and to reliably determine the second information SB recorded in a minute pulse of 5 nm or less.
- the amount of sample ⁇ is set to 5 nm or less.
- SNR signal-to-noise ratio
- the optical disc reproducing apparatus 30 of the present embodiment is configured so that the digital integration circuit 55 performs the integration at least 16 times or more as described above, and the conventional configuration.
- a disk with the smallest possible wobble amount ⁇ can be reliably detected with an SNR equal to or higher than the conventional one.
- the second information SB is allocated and recorded in one block as shown in FIGS. 5 and 6, and then, as described above. Recorded in multiple blocks. In other words, this means that the same information as the second information SB is recorded over a plurality of blocks on the disk 100.
- the second information SB recorded as a cobble is integrated a plurality of times repeatedly. And the quarble on disk 100
- such second information SB is repeatedly recorded for a plurality of blocks on the disk 100, and such second information SB is also recorded.
- the second information SB as the copyright protection information can be reliably reproduced. Become so.
- the present embodiment while realizing recording of the second information SB with the same small amount of displacement of the quable as in the past, in the case of Example 7L, the effect is recorded at the beginning of the frame. In the case where there is a missing dot, it is possible to more reliably reproduce the second information SB.
- the second information s B recorded by the minute pebble does not change the recorded signal at all.
- a value of 0 will render the file unplayable, which will allow only legitimate discs to be circulated, and will further strengthen copyright protection. .
- each of the second information SBs is alternately allocated to a positive polarity signal and a negative polarity signal by the non-inverting amplifier 27 ⁇ ⁇ ⁇ and the inverting amplifier '27 7. .
- a pseudo-random number sequence for example, a pseudo-random number sequence
- the multiple bits that make up the fundal information are recorded as allocated.
- a plurality of bits constituting the second digital information are allocated in a unit section of the same synchronization signal so as to be recorded periodically.
- ⁇ -As a result, it is possible to determine the value of each bit by integrating information from a large number of bridging bits over a unit section of a plurality of synchronization signals.
- the second digital information can be read stably and surely without being affected by the lack of the discs present on the disc-shaped recording medium.
- the second digital signal since the value of each bit constituting the second digital signal is determined after integration during reproduction, the second digital signal is compared. It is possible to record with a very small quarble.
- the second digital signal may be analyzed by an electron microscope or the like. This can be made more difficult, and the above second digital information can be easily decrypted
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- Computer Security & Cryptography (AREA)
- Manufacturing & Machinery (AREA)
- Optical Recording Or Reproduction (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
- Manufacturing Optical Record Carriers (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
Description
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Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
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EP03768297A EP1475788B1 (en) | 2003-01-06 | 2003-12-26 | Mastering device, disc manufacturing method, disc-shaped recording medium, disc reproduction device, and disc reproduction method |
CA2477424A CA2477424C (en) | 2003-01-06 | 2003-12-26 | Mastering device, disc manufacturing method, disc-shaped recording medium, disc reproduction device, and disc reproduction method |
US10/504,322 US7248558B2 (en) | 2003-01-06 | 2003-12-26 | Mastering device, disc manufacturing method, disc-shaped recording medium, disc reproduction device, and disc reproduction method |
AT03768297T ATE533150T1 (de) | 2003-01-06 | 2003-12-26 | Vorrichtung zur masterherstellung, herstellungsverfahren einer platte, aufzeichnungsplatte, plattenwiedergabevorrichtung und wiedergabeverfahren fuer platten |
HK06103732A HK1083919A1 (en) | 2003-01-06 | 2006-03-24 | Mastering device, disc manufacturing method, disc-shaped recording medium, disc reproduction device,and disc reproduction method |
US11/764,418 US7596075B2 (en) | 2003-01-06 | 2007-06-18 | Mastering device, disc manufacturing method, disc-shaped recording medium, disc reproduction device, and disc reproduction method |
US12/512,613 US7903522B2 (en) | 2003-01-06 | 2009-07-30 | Mastering device, disc manufacturing method, disc-shaped recording medium, disc reproduction device, and disc reproduction method |
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JP2001357533A (ja) | 1999-07-07 | 2001-12-26 | Matsushita Electric Ind Co Ltd | 光ディスク、その記録装置、記録方法及び再生装置 |
JP2002197671A (ja) * | 2000-12-26 | 2002-07-12 | Sony Corp | 光記録媒体、光記録媒体の記録方法及び記録装置、光記録媒体の再生方法及び再生装置 |
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JPH09246979A (ja) | 1996-03-04 | 1997-09-19 | Hitachi Ltd | ディジタルデータの変調方法,変調装置,復調方法および復調手段 |
JP3442945B2 (ja) | 1996-10-31 | 2003-09-02 | 株式会社東芝 | 同期回路 |
JP3551727B2 (ja) * | 1997-10-21 | 2004-08-11 | ソニー株式会社 | 光情報記録装置、光情報記録媒体及び光情報再生装置 |
US6735160B1 (en) * | 1999-07-07 | 2004-05-11 | Matsushita Electric Industrial Co., Ltd. | Optical disc, and recording apparatus, recording method, and reproducing apparatus for the same |
JP3503930B2 (ja) | 1999-08-04 | 2004-03-08 | 株式会社リコー | 復調回路及びこれを用いた情報記録再生装置 |
JP4310885B2 (ja) | 2000-05-11 | 2009-08-12 | ソニー株式会社 | 光ディスク装置、光ディスクのアクセス方法及び光ディスク |
JP4449175B2 (ja) | 2000-06-22 | 2010-04-14 | ソニー株式会社 | 光ディスク装置、光ディスクの記録方法、光ディスク、光ディスクの再生方法 |
JP4273767B2 (ja) * | 2003-01-06 | 2009-06-03 | ソニー株式会社 | マスタリング装置、ディスク製造方法、ディスク状記録媒体、ディスク再生装置、ディスク再生方法 |
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- 2003-12-26 WO PCT/JP2003/016868 patent/WO2004061832A1/ja active Application Filing
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JPH07272282A (ja) * | 1994-02-10 | 1995-10-20 | Victor Co Of Japan Ltd | 光ディスク,チェック装置,及び記録装置 |
JPH1166739A (ja) * | 1997-08-19 | 1999-03-09 | Seiji Yonezawa | 光記録担体および光記録担体の記録装置ならびに再生装置 |
JP2000242929A (ja) * | 1998-12-07 | 2000-09-08 | Sony Corp | データ記録方法および装置、データ再生方法および装置、並びに記録媒体 |
JP2000195049A (ja) * | 1998-12-28 | 2000-07-14 | Sony Corp | 光ディスク記録装置、光ディスクの記録方法、光ディスク再生装置、光ディスクの再生方法及び光ディスク |
JP2001357533A (ja) | 1999-07-07 | 2001-12-26 | Matsushita Electric Ind Co Ltd | 光ディスク、その記録装置、記録方法及び再生装置 |
JP2002197671A (ja) * | 2000-12-26 | 2002-07-12 | Sony Corp | 光記録媒体、光記録媒体の記録方法及び記録装置、光記録媒体の再生方法及び再生装置 |
Also Published As
Publication number | Publication date |
---|---|
HK1103848A1 (en) | 2007-12-28 |
CN100429704C (zh) | 2008-10-29 |
CN1692413A (zh) | 2005-11-02 |
CN1917049A (zh) | 2007-02-21 |
US7903522B2 (en) | 2011-03-08 |
CA2477424A1 (en) | 2004-07-22 |
TWI277965B (en) | 2007-04-01 |
US20050122889A1 (en) | 2005-06-09 |
EP1475788B1 (en) | 2011-11-09 |
CN1310223C (zh) | 2007-04-11 |
US7248558B2 (en) | 2007-07-24 |
KR101017306B1 (ko) | 2011-02-28 |
JP4273767B2 (ja) | 2009-06-03 |
US20090285058A1 (en) | 2009-11-19 |
US7596075B2 (en) | 2009-09-29 |
TW200425102A (en) | 2004-11-16 |
ATE533150T1 (de) | 2011-11-15 |
EP1475788A4 (en) | 2010-01-06 |
TW200630980A (en) | 2006-09-01 |
EP1475788A1 (en) | 2004-11-10 |
HK1083919A1 (en) | 2006-07-14 |
KR20050088260A (ko) | 2005-09-05 |
CA2477424C (en) | 2012-07-24 |
JP2004213781A (ja) | 2004-07-29 |
TWI268496B (en) | 2006-12-11 |
US20070297318A1 (en) | 2007-12-27 |
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