WO2005104104A1 - 固有の識別情報が書き込まれた再生専用の光記録媒体 - Google Patents
固有の識別情報が書き込まれた再生専用の光記録媒体 Download PDFInfo
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- WO2005104104A1 WO2005104104A1 PCT/JP2005/006953 JP2005006953W WO2005104104A1 WO 2005104104 A1 WO2005104104 A1 WO 2005104104A1 JP 2005006953 W JP2005006953 W JP 2005006953W WO 2005104104 A1 WO2005104104 A1 WO 2005104104A1
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- pattern
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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
- G11B7/007—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
- G11B7/00736—Auxiliary data, e.g. lead-in, lead-out, Power Calibration Area [PCA], Burst Cutting Area [BCA], control information
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10009—Improvement or modification of read or write signals
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
- G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
- G11B27/32—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on separate auxiliary tracks of the same or an auxiliary record carrier
- G11B27/322—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on separate auxiliary tracks of the same or an auxiliary record carrier used signal is digitally coded
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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
- G11B7/268—Post-production operations, e.g. initialising phase-change recording layers, checking for defects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/84—Television signal recording using optical recording
- H04N5/85—Television signal recording using optical recording on discs or drums
Definitions
- the present invention relates to a read-only optical recording medium on which unique identification information can be written, and a management method for writing, for example, medium-specific identification information to a read-only optical recording medium, and particularly to a modulation method.
- the present invention relates to a method for recording identification information on a read-only optical recording medium to which parity preserving modulation is applied. Further, the present invention relates to an optical recording medium manufacturing apparatus and method, an identification information recording apparatus and method, and an optical recording medium reproducing apparatus and method related to the optical recording medium and the management method.
- playback-only optical recording such as CD (Compact Disc) and DVD (Digital Versatil Disc) is available.
- CD Compact Disc
- DVD Digital Versatil Disc
- the medium is known.
- the disc-shaped read-only optical recording medium such as a CD or DVD
- the disc-shaped read-only optical recording medium is a duplication medium compared to other recording media, such as tape cassettes and video tape cassettes for video tape recorders, which use a rewritable recording medium as a read-only medium.
- the master is hardly deteriorated, and the duplication is extremely easy. This is very advantageous from the viewpoint of the time required for duplication and the cost.
- the method developed by Sony Disc Technology, Inc. means that optical recording media such as CDs, which use a material that is melted by write-once light as a material of a reflective film serving as a recording layer, are mass-produced by a stamper or the like. Subsequently, a high-power laser beam is applied to a predetermined portion of the convex / concave pattern (land) formed on the recording track to convert the land into a concave (pit). That is the method.
- areas where lands can be pitted are provided in a plurality of predetermined portions on a read-only medium, and the respective portions are left in a state of a force land for pitting lands according to the unique information of the medium.
- the part where the land is pitted must be a certain predetermined part on the medium, and after the land has been pitted. If a data string that does not comply with the modulation rule is formed, the recording medium cannot be reproduced.
- an optical disc which uses a light beam having a wavelength of about 405 nm as an optical disc which has a higher recording density and a higher capacity than a CD or DVD, and which has a higher capacity.
- optical discs of this type which have been designed to have high density and high capacity, an extremely large amount of content can be recorded on one piece of data. Not only can it cause serious damage to the company, but can also cause irreparable disadvantages.
- 17 parity is used as the modulation method.
- a conservative modulation scheme is used.
- This 17-parity preservation modulation method is a modulation method in which the modulation unit is variable length, unlike the modulation method of fixed bit length such as EFM or EFM + modulation method, and information for notity preservation is transmitted before modulation. It has the feature of being added. Because of these characteristic points, it is very difficult to form a land at which identification information can be additionally recorded at a predetermined position in 1-7 parity preserving modulation as compared with EFM or the like.
- the modulation unit is of variable length, even if the same bit string is modulated, the bit string generated after the modulation may be significantly different depending on the preceding and following bit strings. . In other words, it is necessary to form a land at a specific position on the medium, but it is very difficult to form a specific recording pattern at a specific position because of the variable-length coding method.
- parity storage modulation information for storing parity is added by 1 bit before modulation. Due to the influence of this bit, even if the same information is used, the information may change if this bit enters in the middle. Furthermore, since one bit is added in the middle of the variable length in units of two bits, irregularity is further increased.
- a predetermined bit string is placed at a predetermined position. It is much more difficult to generate such a pattern than in the conventional case where a pattern of a predetermined bit string is generated at a predetermined position by EFM, EFM + modulation.
- An object of the present invention is to provide a read-only optical recording medium on which a bit string subjected to variable-length modulation such as 17-parity preserving modulation is recorded by performing variable-length modulation on identification information such as medium-specific information.
- An object of the present invention is to provide an optical recording medium that can be additionally recorded in a bit string later, and a method for managing identification information of a read-only medium.
- Another object of the present invention is to provide an optical recording medium manufacturing apparatus and method for manufacturing such an optical recording medium, an identification information recording apparatus and method for writing identification information to such an optical recording medium, Another object of the present invention is to provide an optical recording medium reproducing apparatus and method for reproducing such an optical recording medium.
- a convex portion (land) and a concave portion (pit) are formed along a recording track in accordance with a modulated bit sequence generated by performing variable length modulation on an information bit sequence.
- a write-once area in which a predetermined write-on pattern is formed is provided at a plurality of predetermined positions on a recording track.
- the pattern has the shape of a pit land pit, and the length of the pit-land-pit additional recording pattern is equal to or less than the longest code length of the modulated bit sequence and is three times or more the shortest code length of the modulated bit sequence.
- the modulated bit string before and after the pit additional write pattern is also changed when the pit-land-pit additional write pattern portion is replaced with a pattern composed entirely of pits.
- the entire post-adjustment bit string is generated so as to conform to the rules of variable-length modulation.
- the pit land The middle land of the pit additional write pattern does not change materially even when irradiated with the laser power for reproduction. However, when a laser beam having a power larger than the laser power for reproduction is irradiated, the pits have the same reflection characteristics.
- the method for managing identification information of a read-only medium includes a convex portion (land) and a concave portion (land) along a recording track corresponding to a modulated bit sequence generated by performing variable length modulation on an information bit sequence. (Pits) are continuously formed, and a management method for recording the identification information of the optical recording medium in the recording track on the read-only optical recording medium, comprising: At a plurality of positions, a write-once area in which a predetermined write-on pattern is formed is set, and the write-once pattern formed in the write-on area is a pit-land-pit shape, and the length of the pit-land-pit write-on pattern is set.
- the bit length after the modulation is equal to or less than the longest code length of the bit string after modulation, and at least three times the shortest code length of the bit string after modulation. Even when the pattern of the additional write pattern of the bit is replaced with a pattern composed entirely of pits, the entire bit string after modulation is generated so as to follow the rules of variable length modulation, and the pit land Irradiation of the lands with the laser power for reproduction does not cause any physical change, but when irradiating a laser beam with a power higher than the laser power for reproduction, the reflection characteristics of the pits are reduced.
- the identification information represented by the bit value that is identified by the presence or absence of is recorded by irradiating a laser beam with a power higher than the laser power for reproduction.
- An optical recording medium manufacturing apparatus provides a convex portion (land) and a concave portion (pit) along a recording track corresponding to a modulated bit sequence generated by performing variable length modulation on an information bit sequence.
- An optical recording medium manufacturing apparatus for manufacturing a read-only optical recording medium in which a write-once pattern is formed continuously has a write-once area where a predetermined write-on pattern is formed at a plurality of predetermined positions on a recording track.
- the additional recording pattern formed in the additional recording area has the shape of a pit land pit, and the length of the pit land pit additional recording pattern is equal to or less than the longest code length of the modulated bit sequence and the shortest code length of the modulated bit sequence.
- the modulated bit string before and after the pit-to-land-to-pit write pattern is composed of all pits. Even when the pattern is replaced, the pit land is reproduced using the stamper generated from the master, which is generated so that the entire bit sequence after modulation follows the rules of variable length modulation. Irradiation with a laser power for laser irradiation does not cause any physical change, but irradiation with a laser beam having a power higher than the laser power for reproduction produces an optical recording medium having the same pit reflection characteristics.
- a convex portion (land) and a concave portion (pit) are formed along a recording track corresponding to a modulated bit sequence generated by performing variable length modulation on an information bit sequence.
- a write-once pattern is continuously formed, a write-once area having a predetermined write-on pattern is formed at a plurality of predetermined positions on a recording track.
- the additional recording pattern formed in the additional recording area has the shape of a pit land pit, and the length of the pit land pit additional recording pattern is equal to or less than the longest code length of the modulated bit sequence and the shortest code length of the modulated bit sequence.
- the modulated bit string before and after the pit-to-land-to-pit write pattern is composed of all pits. And replaced by a pattern Also, using the stamper generated from the master to generate the entire bit sequence after modulation in accordance with the rules of variable length modulation, the land in the center of the pit additional pattern of the pit is used for reproduction. Irradiation with a laser power of the same does not cause any physical change, but irradiation with a laser beam having a power higher than the laser power for reproduction produces an optical recording medium having the same pit reflection characteristics.
- the identification information recording device includes a convex portion (land) and a concave portion (pit) along a recording track corresponding to a modulated bit sequence generated by performing variable length modulation on an information bit sequence.
- a read-only optical recording medium formed continuously, and has a write-once area where a predetermined write-on pattern is formed at a plurality of predetermined positions on a recording track, and is formed in the write-once area.
- the additional recording pattern described above has the shape of a pit land pit, and the length of the pit land pit additional recording pattern is equal to or less than the longest code length of the modulated bit string and is three times or more the shortest code length of the modulated bit string.
- the post-modulation bit string before and after the pit land pit write pattern is changed when the pattern of the pit land pit write pattern is replaced with a pattern composed entirely of pits. After the modulation, the entire bit string is generated so as to follow the rules of variable length modulation.
- the pit land The middle land of the pit additional recording pattern does not change materially even when irradiated with the laser power for reproduction. However, when a laser beam with a power higher than the laser power for reproduction is applied, the recording power of the read-only optical recording medium, which has the same reflection characteristics as the pits, is applied to the laser power for reproduction.
- Recording means for writing data by irradiating a laser beam having a large power, and identification information generating means for generating identification information to be written in an additional recording area, wherein the recording means performs additional recording while reproducing the optical recording medium.
- the additional write pattern of the area is sequentially detected, and when the additional write pattern is detected, the detected additional write pattern is reproduced according to the identification information generated by the identification information generating means.
- Laser light having a power larger than the laser power for the pattern writing is used to change the reflection characteristic of the land portion of the write-once pattern.
- a convex portion (land) and a concave portion (pit) are formed along a recording track corresponding to a modulated bit sequence generated by performing variable length modulation on an information bit sequence.
- a read-only optical recording medium formed continuously, and has a write-once area where a predetermined write-on pattern is formed at a plurality of predetermined positions on a recording track,
- the write-once pattern formed in the write-on area has the shape of a pit land pit, and the length of the pit land pit write-on pattern is less than or equal to the longest code length of the modulated bit string and three times the shortest code length of the modulated bit string.
- the modulated bit string before and after the pit land pit additional write pattern is the same as the entire pit land pit additional write pattern even when the part of the additional pit land pit additional write pattern is replaced with a pattern composed of pits.
- the pit land is generated so as to follow the variable length modulation rule, and the lands in the middle of the pit postscript pattern do not change materially even when irradiated with the laser power for reproduction.
- the recording track of a read-only optical recording medium that has the same pit reflection characteristics
- the recording pattern is sequentially detected while reproducing the recording information, and when the additional recording pattern is detected, identification information is generated, and according to the generated identification information, the additional recording pattern is detected.
- a laser beam having a power larger than the laser power for reproduction is irradiated to change the reflection characteristic of the land portion of the additional recording pattern.
- a convex portion (land) and a concave portion (pit) are formed along a recording track in correspondence with a modulated bit sequence generated by performing variable length modulation on an information bit sequence.
- a read-only optical recording medium formed continuously, and has a write-once area where a predetermined write-on pattern is formed at a plurality of predetermined positions on a recording track.
- the formed additional recording pattern has the shape of a pit land pit, and the length of the pit land pit additional recording pattern is equal to or less than the longest code length of the modulated bit sequence and is at least three times the shortest code length of the modulated bit sequence.
- the bit string after modulation before and after the pit land pit additional write pattern is obtained when the part of the pit land pit additional write pattern is replaced with a pattern composed entirely of pits.
- the reproducing means reads the additional recording pattern formed in each additional recording area of the optical recording medium.
- Read-out, read-out additional writing pattern power Determines whether the pit-to-land-to-pit pattern is a pattern composed of all pits, detects the bit value of the additional writing area, and optically records. Based on the bit values detected from the write-once areas at a plurality of positions on the medium, identification information written on the optical recording medium is generated.
- a convex portion (land) and a concave portion (pit) are formed along a recording track corresponding to a modulated bit sequence generated by performing variable length modulation on an information bit sequence.
- a read-only optical recording medium formed continuously, and has a write-once area where a predetermined write-on pattern is formed at a plurality of predetermined positions on a recording track.
- the formed additional recording pattern has the shape of a pit land pit, and the length of the pit land pit additional recording pattern is equal to or less than the longest code length of the modulated bit sequence and is at least three times the shortest code length of the modulated bit sequence.
- the bit string after modulation before and after the pit land pit additional write pattern is obtained when the part of the pit land pit additional write pattern is replaced with a pattern composed entirely of pits.
- the optical recording medium which is generated so that the entire modulated bit sequence complies with the variable length modulation rule, is reproduced, and the additional recording pattern formed in each additional recording area of the optical recording medium is read.
- Pit land Determines whether the pit pattern has a pattern composed of all pits and whether the pattern is composed of all pits, detects the bit value of the additional recording area, and detects the additional recording area force at a plurality of positions on the optical recording medium. Based on the bit value, identification information written on the optical recording medium is generated.
- a write-once pattern having a pit-land-pit shape is formed in a plurality of predetermined areas in a recording track of a read-only optical recording medium employing variable length modulation.
- the additional write pattern has a length equal to or less than the longest code length of the post-modulation bit sequence and three times or more the shortest code length of the post-modulation bit sequence. Even when the entire bit sequence is replaced with a pattern composed of pits, the entire modulated bit sequence is generated so as to follow the rules of variable length modulation, and the land in the middle of the additional recording pattern is used for reproduction. Irradiation with the laser power does not cause any physical change, but when irradiating a laser beam with a power higher than the laser power for reproduction, it is considered to be equivalent to the pit reflection characteristics.
- identification information such as medium-specific information is additionally recorded later in a bit string that has been subjected to variable-length modulation. It becomes possible.
- FIG. 1A is a plan view showing an example of an optical disc to which the present invention is applied
- FIG. 1B is an enlarged partial perspective view showing a pit pattern formed on the optical disc.
- FIG. 2 is a diagram showing a format of an error detection code (EDC).
- EDC error detection code
- FIG. 3 is a diagram showing a format of an error correction code (ECC).
- ECC error correction code
- FIG. 4 is a diagram showing a BIS format.
- FIG. 5 is a diagram showing a relationship between a physical cluster and a linking area.
- FIG. 6 is a diagram showing a data configuration of a physical cluster.
- FIG. 7A to FIG. 7C are diagrams each showing a data configuration of a data frame.
- FIG. 8 is a diagram showing a UDI generation bit string provided in a DC control block.
- FIG. 9A is a partial cross-sectional view of an optical disc showing a write-once pattern before melting.
- 9B is a partial cross-sectional view of the optical disc showing a state where the write-once pattern is irradiated with laser light.
- FIG. 9C is a partial cross-sectional view of the optical disc showing a write-once pattern after melting.
- FIG. 10 is a diagram showing a modulation table of 1-7 parity storage modulation.
- FIG. 11 is a diagram showing a frame synchronization signal of a data frame.
- FIG. 12 is a diagram showing a UID generation bit string for generating a 3T-2T-3T additional recording pattern.
- FIG. 13 is a diagram showing information after demodulating the result of performing 1-7 parity storage modulation on a UID generation bit sequence for 3T-2T-3T.
- FIG. 14 is a diagram showing a UID generation bit sequence for generating a 4T-2T-2T additional recording pattern.
- FIG. 15 is a diagram showing information after demodulating the result of performing 1-7 parity storage modulation on a UID generation bit sequence for 4T-2T-2T.
- FIG. 16 is a flowchart showing a process of a method for manufacturing an optical disc to which the present invention is applied.
- FIG. 17 is a block diagram showing an example of a UID cutting device to which the present invention is applied.
- FIG. 18 is a block diagram showing a more detailed configuration of the UID cutting device.
- FIG. 19 is a block diagram showing an example of an optical disc reproducing apparatus to which the present invention has been applied.
- FIG. 20 is a block diagram showing another example of the optical disc reproducing apparatus to which the present invention is applied.
- the optical disk 1 is a read-only disk in which data is reproduced using a light beam having a wavelength of about 405 nm and the density of recorded data is increased and the capacity is increased.
- This optical disc 1 has a radius R of 60 mm and a thickness d of 12 mm, as shown in FIGS. 1A and IB.
- a blue-violet laser emitting a laser beam having a wavelength of 405 nm is used.
- a lens having a numerical aperture (NA) of 0.85 is used as the objective lens for converging and irradiating the laser beam emitted from the laser onto the signal recording surface of the optical disc 1.
- data is written on the optical disc 1 by forming a concave portion 4 along a recording track on a bottom surface portion 3 which is a laser light reflecting surface side. That is, it is formed on a recording track having a continuous force of a concavo-convex pattern corresponding to a bit string of data to be recorded.
- the concave portion 4 formed on the bottom surface 3 of the recording track is referred to as “pit”, and the bottom surface 3 other than the pit on the bottom surface of the recording track is referred to as “land”.
- the optical disc 1 has a reflective film 6 having high light reflection characteristics laminated on a substrate 5 made of synthetic resin such as polycarbonate or acrylic having light transmittance, and a protective film laminated on the reflective film 6. It is configured.
- the optical disk 1 is irradiated with a light beam from the protective film side, and data is read.
- the material properties of the reflective film 6 do not change at all even when irradiated with a laser beam having a power of a normal reproduction level.
- the material melts and has a partial force equivalent to the reflection characteristics of the S-pit portion.
- the lands are made of a material that can be regarded as pits when irradiated with high-power laser light.
- the reflection layer is formed of aluminum.
- the reflection layer is made of, for example, an alloy of aluminum and titanium, an alloy of aluminum and another element, an alloy containing silver, or the like. It is composed of
- the optical disc 1 is manufactured by transferring the pattern of concavo-convex (land and pit) by a stamper or the like, the same product is mass-produced.
- the identification information unique to each disk (hereinafter, also referred to as a unique ID or UID) is recorded one by one.
- the recording method is such that a predetermined position in a recording track of a disc is irradiated with a high-power laser and a plurality of additional recording areas in which a land can be pitted are set in advance as a transfer pattern, and a unique ID is set.
- a predetermined additional recording area of all the additional recording areas is selected according to the content of the additional recording area, and a land at a predetermined position in the selected additional recording area is irradiated with a high-power laser to perform pitting.
- the optical disc 1 is managed by a recorded logical capacity and a predetermined physical format.
- the logical format is characterized in that an error correction code based on Reed'Solomon code is applied to user information.
- the physical format is characterized in that information subjected to error correction coding is subjected to 1-7 parity preserving modulation coding and NRZ-NRZI conversion.
- the entire information recorded on the optical disk 1 is divided into 64 kilobyte data groups, error detection and correction codes are added to each divided data group, and it is called one ECC cluster.
- ECC cluster Form the basic unit of data.
- ECC error detection code
- predetermined scrambling is performed for each of the 32 2052 byte data groups, and the data is returned to the original data group (32 ⁇ 2052 bytes). Then, as shown in Figure 3, this 32 x 20
- the 52-byte data group is subdivided into 304 data groups of 216 bytes in size. next
- the ECC cluster is completed by performing a predetermined interleaving and rearranging.
- the error correction code added to the ECC cluster uses the Reed-Solomon code encoding scheme shown by the following generator polynomial of Equation 2.
- the optical disc 1 has a data unit called a BIS cluster in addition to the ECC cluster.
- the BIS cluster is a data unit in which an ECC cluster number called an address, a block number in the ECC cluster, and a number called a user control indicating a function of information recorded in the ECC cluster are recorded.
- the specific configuration of the BIS cluster is as follows. First, an address composed of 4 bytes of information indicating an address number, 1 byte of information as additional data, and an error correction code of 4 bytes of Reed'Solomon code is formed. Next, 24 30-byte data groups are formed by combining such 9-byte address information and 21-byte user control. Next, as shown in FIG. 4, a 32-byte error correction code is added to each of the 30-byte data groups, and finally rearranged by performing a predetermined interleaving to complete the BIS cluster.
- the generator polynomial of the error correction code added to the BIS cluster is as shown in Equation 3 below.
- the physical layer of the optical disc 1 includes a physical cluster portion in which data obtained by combining an ECC cluster and a BIS cluster is recorded, and two linking portions connecting these physical cluster portions. It is configured to appear.
- the physical cluster section is divided into 16 blocks called address units, and each address unit is further divided into 31 data frames.
- the linking unit is composed of two data frames.
- Data frame 155 bytes of information are recorded as shown in FIG. 7A.
- Data frame The data of the team is the information of the three-knowledge BIS cluster at the 39th, 78th, and 117th knots, and the remaining 152 bytes are the information of the ECC cluster.
- the BIS cluster contains address data and user control data. The address is included in the BIS cluster of the first three data frames in each address unit, and the user control data is the rest. Included in the BIS cluster of the data frame! / ,.
- the actual data is divided into a total of 28 data groups, with the first 25 bits as one data group and the rest as 45-bit data groups. .
- the data frame consists only of a 20-bit frame synchronization signal, 25-bit real data, and one DC control bit at the beginning, and the other 45-bit real data and one bit as shown in Figure 7C.
- the DC control bits are divided into 28 DC control blocks.
- the 1-bit DC control bit at the end of each block is an index digital sum value indicating the magnitude of the DC component obtained by adding the modulated bit values 0 to 1 and 1 in correspondence with 1.
- the bit value is determined so that the absolute value of (DSV) approaches 0.
- a bit string of a predetermined number of bits (eg, 12 bits (before 1-7 parity preservation modulation)) for forming an additional recording area for identification information unique to the medium, as shown in FIG. (Record generation data) so that (UID generation bit string) is formed in a predetermined DC control block. That is, after the optical disc 1 is manufactured by the stamper, a UID generation bit string is formed at a predetermined position in order to form an additional recording area for additionally recording a unique ID by irradiating a high output laser.
- This UID generation bit sequence is a bit sequence for generating a pit-land-pit additional recording pattern (described in detail later) after performing 1-7 parity storage modulation and NRZ-NRZI conversion.
- the UID generation bit sequence is not provided for all DC control blocks, but only for a specific DC control block. For example, one or more predefined physical
- the UID generation bit sequence is formed in the DC control block of some of the data frames. Also, the UID generation bit string is formed only for some DC control blocks, not for all DC control blocks in the data frame.
- FIG. 8 is a diagram showing a formation position of a UID generation bit string in the DC control block.
- the UID generation bit string is formed at a predetermined position in the DC control block.
- the UID generation bit string is provided so as to be located at the terminal end of the DC control block excluding the DC control bits.
- the DC control bit has two bits. This is described for convenience because the 1-7 parity storage modulation is modulated in units of two bits.
- the position where the UID generation bit sequence is formed is from the beginning of the DC control block to the 33rd bit and the 44th bit (before modulation).
- the UID generation bit string as described above needs to prevent the optical disk 1 from becoming a disk that does not conform to the above-mentioned logical format and physical format by forming the UID generation bit string.
- pits (concave portions) -land (convex portions) are formed at a plurality of predetermined positions on a recording track of the optical disk as shown in FIG. 9A.
- -A pit (recess) pattern is formed.
- this additional pattern is formed by irradiating a high-power laser to the middle land portion to melt the land to form a pit.
- FIG. 9C the pit (recess) -pit ( (Recess)-A pattern for recording a unique ID on the optical disc 1 by using a pit (recess) pattern.
- FIG. 9 shows a diagram in which the substrate is also melted, it is considered that the reflective film is actually melted.
- this additional recording pattern is not limited to any pit-land-pit configuration, and the following conditions are required.
- the postscript pattern is a pit-land-pit concavo-convex pattern.
- the length of the additional write pattern is not more than the longest code length after 17 parity protection modulation and NRZ-NRZI conversion, and is at least 3 times the shortest code length after 17 parity protection modulation and NRZ-NRZI conversion. . That is, since the longest code length is 8T and the shortest code length is 2 ⁇ ( ⁇ is the length of one bit of the modulated bit string), the length of the additional write pattern is 6 ⁇ , 7 ⁇ , or 8 ⁇ .
- the entire post-modulation bit sequence is 1-7 parity protected modulation and NRZ-NRZI. It is generated to follow the rules after conversion.
- the following additional pit-land-pit pattern is a specific example of the additional recording pattern under the above conditions.
- T is the bit length of one modulated bit string.
- 2T is the minimum code length of 1-7 parity preserving modulation, and the energy for melting is the least and it is efficient.
- the 3T-2T-3T pattern has the minimum code length in the 17-parity preservation modulation because the middle land of the pit land pit additional write pattern is 2T, and requires the least energy for melting and additionally write. Since the position margins before and after the position are the widest, it is highly desirable to add the shape.
- the 4T-2T-2T pattern is the middle of the pit-by-land-by-pit postscript pattern. Since the land is 2T, it is the minimum code length in 17-sparity preservation modulation.It requires the least energy for melting, and the efficiency of using residual heat during additional recording is highly desirable. .
- FIG. 10 shows a modulation table of 1-7 parity storage modulation.
- XX in FIG. 10 means that X takes any value of 0 or 1. It is assumed that (_fs) in FIG. 10 represents a bit string of a frame sync.
- FIG. 11 shows a frame synchronization signal. # In FIG. 11 becomes 1 only when the bit string before modulation before this frame sync is “00” or “0000”, and becomes 0 otherwise.
- FIG. 12 shows a 12-bit UID generation bit string for forming a 3T-2T-3T (pit-land-pit) additional recording pattern for recording a unique ID on the optical disc 1.
- the 12-bit UID generation bit string consists of the first 2 bits of the modulation termination bit string (Termination), the next 2 bits of the polarity control bit string (polarity control), and the last 8 bits.
- UID bit string UID Bit
- the 2-bit bit string (parity) after the UID bit string in FIG. 12 is a bit string for generating DC control bits.
- the modulation termination bit string (Termination), which is the first and second 2 bits of the 12-bit UID generation bit string, is equivalent to the part that determines the last part of the modulation unit of the data immediately before the UID bit string. I do. In other words, this is a bit sequence that terminates the 1-7 parity-preserving modulation of the previous bit sequence properly and does not affect the immediately preceding bit sequence to the modulation of the last modulation end bit sequence and the UID bit sequence. .
- the modulation termination bit sequence (Termination) is, specifically, one of 01, 10, and 11, as shown with reference to the last two bits of the pre-modulation bit sequence.
- the fifth to twelfth eight bits of the 12-bit UID generation bit string are UID bits for generating a 3T-2T-3T pattern.
- the UID bit becomes “01000001” when the bit string power after modulation in FIG. 10 is also found.
- the fifth and twelfth 8-bit UID bits perform 1-7 parity preserving modulation on the assumption that the modulation is terminated by the fourth bit.
- the bit string generated by performing 1-7 parity preserving modulation on the UID bit is "010-010-100-100".
- NRZ-NRZI conversion it becomes "001-110-011-100". Lands and pits correspond to the 0 and 1 forces of the bit string value after this N RZ-NRZI conversion.
- the bit sequence after NRZ-NRZI conversion is 2T-3T-2T-3T-2T.
- the patterns from the 3rd bit to the 10th bit are 3T-2T-3T patterns.
- the pattern power of the 3T-2T-3T is a write-once pattern. Therefore, the pit portion of the Pitland pit additional write pattern is the 57th and 58th bits after 17-parity storage modulation and NRI-NRZI conversion.
- the third and fourth bits of the 12-bit UID generation bit string, the polarity control bit string (polarity control), are the 1st and 2nd bits after 1-7 parity-preserving modulation and NRZ-NR ZI conversion.
- a polarity control bit whose bit value is controlled so that the additional pattern of 3T-2T-3T generated in the subsequent stage is a pit-land-pit Become.
- the run length is determined only by the 3T-2T-3T pattern generated by the UID bit, but due to the effect of NRZ-NRZI conversion, the pit-land-pit force or It is uncertain whether it is nd-pit-land.
- the bit value power up to the first two bits corresponds to a land or a pit.
- the polarity control bit string determines whether the pattern power of the above 3T-2T-3T is a pit-land-pit or a land-pit-land pattern.
- the polarity control bit string (polarity control) force is "01” or “11”
- the polarity is inverted twice.
- the polarity is inverted once. Therefore, if the bit at the end of the modulation of the modulation end bit string is a land, the polarity control bit string (polarity control) is “10”, and the bit at the end of the modulation of the modulation end bit string is a pit.
- the polarity control bit string (polarity control) is “01” or “11”.
- the 2-bit bit strings 01, 10, and 11 must always be the last of the modulation units. It is not necessarily a bit. For example, if 01, the last bit is 11, then the end of the modulation will not be reached; if 10, the last bit will be 11, the end of the modulation will not be reached; If, then the subsequent bit is 0111, it will not be the end of the modulation.
- the bit immediately before the polarity control bit is the end of the modulation for the data up to that point, and a 3T-2T -3T pattern is always generated. Before modulating the pattern, it is necessary that the polarity control bit itself be modulated at the end of the modulation data.
- Type (Group A) modulates the polarity of the modulated bits after modulating the first two bits of the 12 bits.
- Type (B) is a type that retains the polarity of the modulated bit string after modulating the first two bits of the 12 bits.
- one bit string of (Group A) is selected and inserted into the pre-modulation bit string.
- one bit string of (Group B) may be inserted into the pre-modulation bit string.
- the additional pattern of 3T-2T-3T can be added at a predetermined position in the DC block. Can be formed.
- Each pair is different only in the third bit.
- bit strings for example, it is assumed that one shift force is arranged at a predetermined position with respect to an information bit string immediately before performing 17 parity preservation modulation.
- the 1st to 7th parity preserving modulation modulates up to the 2nd bit of the above information as a block, it is checked whether the additional pattern of 3T-2T-3T is pit-land-pit. In case of pit-land-pit, the third bit is kept as it is. If not a pit-land-pit, the third bit is inverted. That is, the bit sequence is replaced with the other bit sequence.
- the first column at the left end is the six types of UID generation bit strings that appear as the four types of pairs described above. These are selected such that the 2T portion of the combination of 3T-2T-3T becomes a land according to the information on the polarity of the land and pit when modulating up to the second bit.
- the second column is the result of modulating the UID generation bit string in the first column using the modulation table of FIG.
- the third column shows that an 8T pit was generated as a result of additional writing on the land portion of the pit-land-pit combination of the 3T-2T-3T that occurred.
- the NRZI conversion for associating the modulation result with the pits and lands and the inverse conversion are omitted here.
- the fourth column is the result of 1-7 parity storage demodulation of the third column.
- FIG. 14 shows a 12-bit UID generation bit string for forming a 4T-2T-2T (pit-land-pit) additional recording pattern for recording a unique ID on the optical disc 1.
- the 12-bit UID generation bit string consists of the first two bits of the modulation termination bit string (Termination), the next two bits of the polarity control bit string (polarity control), and the last eight bits.
- UID bit string UID Bit
- the UID bit string in Fig. 14 The two-bit bit sequence (parity) at the end is a bit sequence for generating DC control bits.
- the fifth to twelfth eight bits of the 12-bit UID generation bit string are UID bits for generating a 4T-2T-2T pattern.
- the UID bit is specifically "01100011" when the bit string power after modulation in FIG. 10 is also searched for.
- the fifth and twelfth 8-bit UID bits perform 1-7 parity preserving modulation on the assumption that the modulation is terminated by the fourth bit.
- the bit string generated by performing 1-7 parity preserving modulation on the UID bit is "010-001-010-100".
- NRZ-NRZI When this is further converted to NRZ-NRZI, it becomes "001-111-001-100". Lands and pits correspond to the 0 and 1 forces of the bit string value after this N RZ-NRZI conversion.
- the bit sequence after NRZ-NRZI conversion is 2T-4T-2T-2T-2T. Looking at this pattern, it can be seen that the patterns from the 3rd bit to the 10th bit are 4T-2T-2T patterns. That is, this 4T-
- the pit portion of the pit land pit additional write pattern is the 58th and 59th bits after 1-7 parity storage modulation and NRI-NRZI conversion.
- bit strings that satisfy the above conditions for generating 4T-2T-2T (pit-land-pit).
- (Group A) is a type that inverts the polarity of the modulated bits after modulating up to the first two bits of the 12 bits
- (Group B) is the first of the 12 bits. This type maintains the polarity of the modulated bit string after modulating up to 2 bits.
- Each pair is different only in the third bit.
- bit strings for example, it is assumed that one shift force is arranged at a predetermined position with respect to an information bit string immediately before performing 17 parity preservation modulation.
- the 1st to 7th parity preserving modulation modulates the above information up to the second bit as a chunk, it is checked whether the additional recording pattern of 4T-2T-2T is pit-land-pit. In case of pit-land-pit, the third bit is kept as it is. If not a pit-land-pit, the third bit is inverted. That is, the bit sequence is replaced with the other bit sequence.
- the first two bits determine the polarity up to this portion, and the next two bits control the polarity of this partial force, Complete the three steps that the middle 2T of the 4T-2T-2T pattern becomes a land, and put the 4T-2T-2T pit-land-pit in place (for example, at the end of the DC block) Can be generated.
- UID 1-7 parity preservation modulation
- the first column at the left end is the six types of UID generation bit strings that appear as the four types of pairs described above. These are selected such that the 2T portion of the combination of 4T-2T-2T becomes a land according to the information of the polarity of the land and pit when modulating the second bit.
- the second column is the result of modulating the UID generation bit string in the first column using the modulation table of FIG.
- the third column shows that an 8T pit was generated as a result of additional writing on the land portion of the pit-land-pit combination of the generated 4T-2T-2T.
- the NRZI conversion for associating the modulation result with the pits and lands and the inverse conversion are omitted here.
- the fourth column is the result of 1-7 parity storage demodulation of the third column.
- a metal master is created through a resist coating step Sl, a cutting step S12, a developing and fixing step S13, and a metal master creating step S14.
- the resist application step S11 is a step of applying a photoresist to the glass master
- the cutting step S12 is a step of irradiating the photoresist with a laser that is switched in accordance with a bit string to record an uneven pattern.
- the developing and fixing step S13 is a step of developing the resist on which the pattern of the irregularities is recorded on the master and fixing the resist on the master
- the metal master forming step S14 is to subject the surface of the master to electrolytic plating by electroplating. This is the process of creating a metal master.
- a disk substrate is formed through a stamper forming step S15 and a substrate forming step S16 based on the prepared metal master.
- the stamper making step S15 is a step of manufacturing a stamper based on a metal master
- the substrate forming step S16 is to arrange the stamper in a molding die and use an injection molding machine. This is a step of forming a disk substrate using a transparent resin such as polycarbonate or acrylic.
- the land and pit pattern formed on the master in the cutting step S12 is transferred to the disk substrate thus manufactured.
- the read-only optical disk 1 is manufactured through a reflective film forming step S17 and a protective film coating 18.
- a reflection film is formed by sputtering or the like on the surface of the disk substrate on which the pit pattern has been formed.
- the optical disc 1 records the medium-specific identification information on the reflective film.
- this reflective film In order to manufacture the optical disc 1, this reflective film must be a reflective film capable of recording medium-specific identification information by thermal recording in addition to normal bit information. Therefore, as this reflective film, in addition to aluminum, which is a general reflective film composition, a reflective film made of an alloy by mixing another element such as titanium is used.
- Protective film application step S18 forms a protective film. This step is performed by applying an ultraviolet-curable resin onto the reflective film by spin coating and irradiating ultraviolet rays. The optical disc 1 formed in this way can reproduce information by irradiating a laser beam for reading from the protective film side.
- a UID cutting step 19 is performed.
- a high-power laser beam is applied to the center land of the pit-land-pit additional recording pattern on each additional recording area, and individual optical discs are individually created. Write your unique ID.
- the optical disc 1 in which the unique ID is written for each optical disc 1 is manufactured.
- the UID cutting device 20 used in the UID cutting step 19 will be described with reference to FIG.
- the UID cutting device 20 is a device for additionally recording each unique ID on the same optical disc 1 mass-produced. As shown in FIG. 17, the UID cutting device 20 irradiates the optical disc 1 with a laser beam having an energy sufficiently higher than that during normal reproduction to write a pit-land-bit additional pattern in which a UID can be additionally recorded.
- a UID writer 21 that melts the land of the UID
- a UID detector 22 that reads the signal recorded on the optical disc 1 to detect the position of the pit-land-bit additional recording pattern
- a UID generator 23 that generates the unique ID
- a drive unit 24 for driving the optical disc 1 to rotate.
- a laser beam for irradiating the additional recording pattern is switched according to the bit string of the unique ID generated from the UID generating unit 23.
- the UID generating section 23 is a modulated bit string output from an external storage device arranged in, for example, a computer.
- the drive unit 24 rotates the optical disc 1 slowly. At this time, the laser light is slowly traced along the recording track of the optical disc 1. As a result, the UID detector 22 can detect a pit-land-bit additional write pattern at a predetermined position on the recording track.
- the UID writer 21 When the UID detector 22 detects the additional recording pattern, the UID writer 21 irradiates a high-power laser beam at the center land position. However, at this time, the UID writer 21 switches whether or not to generate a laser beam according to the bit value generated from the UID generation unit 23. In other words, if the bit value "1" is recorded in the detected additional write pattern, the laser beam is irradiated, and if the bit value "0" is recorded, the laser beam is not emitted. I do.
- the UID writer 21 records bit values for a plurality of additional write patterns provided on the optical disc 1 as described above. This makes it possible to additionally record the unique ID on the optical disc 1.
- the amount of unique ID information recorded on the optical disc 1 will be considered. Assume that the original information amount of the unique ID is 2000 bits. This information is first added with an error correction bit by an error correction coding circuit. As an example of such an error correction coding circuit, a circuit using the BCH coding algorithm can be considered. In this way, a 3000-bit unique ID having bits for error correction is generated, for example. Then 3000 Consider modulation of bits. Here, for example, consider modulation in which "0" is converted to "01" and "1" is converted to "10". By doing so, the unique ID becomes 6000 bits.
- the UID cutting device 20 includes a signal reproduction system 31, a write-once pattern detection unit 32, and a writing unit 33.
- the signal reproduction system 31 equalizes a reproduction signal from the optical disc 1 to a target PRML and detects PRML data, and a PRML equalization circuit 41 performs 17-parity preserving modulation on a reproduction data sequence detected by the PRML.
- 17PP demodulation circuit 42 that performs demodulation
- ECC decoder 43 that performs error correction processing on the reproduced data sequence that has undergone 17 parity preservation modulation
- reproduction data that has undergone 17 parity preservation modulation
- a bino switch 44 for outputting a column without performing an error correction process is provided.
- the reproduced data output from the signal reproducing system 31 without performing the error correction processing and the reproduced data subjected to the error correction are output to, for example, an external computer.
- the external computer detects the position of the UID generation bit string including the pit-land-pit additional recording pattern based on the reproduced data, and feeds back the detected position to the additional recording pattern detector 32.
- the write-once pattern detection unit 32 receives the data string subjected to PRML equalization and the position of the UID generation bit string output from the external computer.
- the additional recording pattern detection unit 32 generates a pulse for specifying the position of the middle land in the pit-land-pit additional recording pattern from these pieces of information.
- the writing unit 33 includes a multiplier 45 and a laser driving unit 46.
- the multiplier 45 receives the pulse for specifying the land position generated from the additional write pattern detection unit 32 and the bit value of the unique ID in which the UID generation unit power is also generated, and multiplies these by the laser drive unit 46.
- the signal “1” is input from the optical disc 45, that is, the timing of the land of the additional recording pattern and the bit value “1” is written in the additional recording pattern, Irradiate light. Excluding that At the timing, a laser beam having a normal reproduction power is irradiated.
- a special bit string is recorded at the head in the physical cluster portion. If this special bit string is stored in the device that records the unique ID, the UID cutting device 20 can easily detect this position by searching for a bit string that matches the pattern of the reproduced bit string.
- a pulse signal for switching laser irradiation at a predetermined timing may be output.
- the pulse signal is a signal for switching the laser irradiation according to the bit value of the identification information corresponding to a predetermined irradiation area.
- the first of these pulse signals occurs in the first frame that does not contain address information. Create a signal that switches according to the bit value of the identification information so that the 61st and 62nd bits of the blocks that make up each frame can be irradiated with the laser.
- the optical disc reproducing apparatus 50 includes a driving section 51 for driving the optical disc 1, a reproducing section 52 for performing a reproducing process on a signal reproduced from the optical disc 1, an information processing section 53, and a UID detecting section.
- a UID detection unit 54 for processing is provided.
- the reproduction unit 52 includes a PRML equalization circuit 61 for performing PRML equalization and binarization on the reproduction signal from the optical disc 1, and a 17-parity preserving modulation for the PRML equalized reproduction data sequence.
- a 17PP demodulation circuit 62 for performing demodulation and an ECC decoder 63 for performing error correction processing on a reproduced data sequence demodulated by 17 parity storage modulation are provided.
- the playback unit 52 has the same configuration as a normal playback device.
- the reproducing unit 52 reproduces a clock from a reproduction signal obtained based on pits and land information obtained from a rotationally driven optical disc 1 by a reading laser (not shown), and performs PRML equalization, 17 It performs demodulation and error correction of the preservation modulation, and reproduces the information recorded on the optical disk 1.
- the information reproduced by the reproducing unit 52 is stored in a memory 65 in the information processing unit 53 and output to the outside.
- the UID detector 54 includes a UID decoder 86 that detects only a unique ID data string from the PRML-processed reproduced data, and a UID-ECC decoder 87 that performs error correction processing on the unique ID data string.
- the UID detecting section 54 is a circuit additionally provided in a normal reproducing apparatus for detecting a unique ID.
- the UID detection unit 54 detects a special physical cluster unit in which a unique ID is recorded and a DC control block based on the PRML equalized and binarized bit string, and detects the DC control block. Detect the state of the additional writing pattern arranged at a predetermined position.
- the UID detecting unit 54 detects whether the state of the additional recording pattern is a pit-land-pit force or whether all of the patterns are pits. If it is a pit-land-pit, it is determined as "0", for example, if it is all pits, it is determined as "1".
- the UID detection unit 54 makes the above determination for all areas where the unique ID is recorded, and outputs a bit string of the unique ID.
- the UID detecting section 54 can detect the unique ID recorded on the optical disc 1.
- a special bit string is recorded at the head of the physical cluster portion.
- the head bit string of this cluster can be searched by the reproduced bit string power pattern match, and this position can be easily detected.
- a reproducing apparatus 70 which is another example of the reproducing apparatus for the optical disc 1 on which a UID is added.
- the playback device 70 includes a drive unit 71 that drives the optical disc 1, a playback unit 72 that performs playback processing on a signal played back from the optical disk 1, an information processing unit 73, A UID detection unit 74 for performing D detection processing is provided.
- the reproduction unit 72 includes a PRML equalization circuit 81 for performing PRML equalization and binarization on the reproduction signal from the optical disc 1, and a 17-parity preserving modulation for the PRML equalized reproduction data sequence.
- 17PP demodulation circuit 82 that performs demodulation
- ECC decoder 83 that performs error correction processing on the reproduced data sequence demodulated with 17 parity storage modulation
- 17 parity storage A bypass switch 84 is provided for outputting a reproduced data sequence demodulated by modulation without performing error correction processing.
- the reproducing section 72 is different from the ordinary reproducing apparatus in that a bypass switch 84 is provided.
- the bypass switch 84 outputs the data string output from the ECC decoder 83 to the information processing unit 73 at the subsequent stage during normal reproduction, and outputs data that has not been corrected by the ECC decoder 83 when a unique ID is detected.
- the column is output to the information processing section 73 at the subsequent stage.
- the information reproduced by the reproducing unit 72 is stored in a memory 85 in the information processing unit 73 and, if it is ordinary information, stored and then output to the outside.
- the UID detection unit 74 detects the unique ID data sequence from the reproduction data stored in the memory 85 in the information processing unit 73, and performs an error correction process on the unique ID data sequence. And a UID-ECC decoder 67.
- the UID detecting section 74 is additionally provided in a normal reproducing apparatus for detecting a unique ID.
- the UID detection unit 74 can be configured by hardware, or can be configured by software executed by a CPU or the like.
- the UID detecting unit 74 generates a bit string (12) for generating a write-once pattern for recording a unique ID from the bit string obtained by equalizing and binarizing the PRML and demodulating 1-7 parity preserving modulation. UID generation bit string) is detected.
- the UID detection unit 74 determines whether the data value of the 12-bit UID generation bit string before writing is added, for example, the force that is the value of the first column in FIGS. 13 and 15, or the data value after writing. For example, it is detected whether the value is the value in the fourth column in FIGS.
- the UID detecting unit 74 makes the above determination for all the areas where the unique ID is recorded, , And outputs the bit string of the unique ID.
- the UID detecting section 74 can detect the unique ID recorded on the optical disc 1.
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- Manufacturing & Machinery (AREA)
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- Optical Recording Or Reproduction (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
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Abstract
Description
Claims
Priority Applications (1)
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US10/592,487 US7590042B2 (en) | 2004-04-21 | 2005-04-08 | Read-only optical recording medium on which unique identification information is written |
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JP2004125892A JP4622291B2 (ja) | 2004-04-21 | 2004-04-21 | 固有の識別情報が書き込まれた再生専用の光記録媒体 |
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JP2006004541A (ja) | 2004-06-18 | 2006-01-05 | Sony Corp | 情報記録媒体、マスタリング装置、識別情報記録装置、識別情報再生装置、マスタリング方法、識別情報記録方法、及び識別情報再生方法 |
JP2006134385A (ja) * | 2004-11-02 | 2006-05-25 | Sony Corp | 光ディスク製造方法及び装置、光ディスク、並びに、光ディスク再生方法及び装置 |
JP2006134386A (ja) | 2004-11-02 | 2006-05-25 | Sony Corp | 光ディスク再生方法及び装置、並びに、光ディスク製造方法 |
MXPA06001347A (es) * | 2005-02-07 | 2006-09-19 | Sony Corp | Aparato y metodo para reproducir, aparato y metodo para grabar, metodo para producir discos opticos y medio para grabar en discos opticos. |
US7975208B2 (en) * | 2006-12-21 | 2011-07-05 | Mediatek Inc. | Method and apparatus for high speed optical recording |
US10453800B1 (en) * | 2018-03-29 | 2019-10-22 | International Business Machines Corporation | Optical chip ID definition using nanoimprint lithography |
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JP2004005919A (ja) * | 2002-03-25 | 2004-01-08 | Sony Corp | 記録媒体の管理方法および記録媒体の管理システム |
JP2004087082A (ja) * | 2002-04-01 | 2004-03-18 | Sony Corp | 記録方法 |
JP2005078212A (ja) * | 2003-08-28 | 2005-03-24 | Sony Corp | 情報処理装置及び情報処理方法、コンテンツ識別装置及びコンテンツ識別方法、並びにコンテンツ識別システム |
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JP2002260286A (ja) * | 2000-12-28 | 2002-09-13 | Victor Co Of Japan Ltd | 情報記録担体、その再生装置及びその記録装置 |
JP3871674B2 (ja) * | 2001-06-08 | 2007-01-24 | 株式会社ソニー・ディスクアンドデジタルソリューションズ | 光ディスク媒体、データ記録方法および装置 |
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2005
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- 2005-04-08 WO PCT/JP2005/006953 patent/WO2005104104A1/ja active Application Filing
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JP2004005919A (ja) * | 2002-03-25 | 2004-01-08 | Sony Corp | 記録媒体の管理方法および記録媒体の管理システム |
JP2004087082A (ja) * | 2002-04-01 | 2004-03-18 | Sony Corp | 記録方法 |
JP2005078212A (ja) * | 2003-08-28 | 2005-03-24 | Sony Corp | 情報処理装置及び情報処理方法、コンテンツ識別装置及びコンテンツ識別方法、並びにコンテンツ識別システム |
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TW200606871A (en) | 2006-02-16 |
JP4622291B2 (ja) | 2011-02-02 |
TWI316238B (ja) | 2009-10-21 |
US20070195686A1 (en) | 2007-08-23 |
US7590042B2 (en) | 2009-09-15 |
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