WO2012042922A1 - Optical information medium, optical information recording and playback device and optical information recording and playback method - Google Patents

Optical information medium, optical information recording and playback device and optical information recording and playback method Download PDF

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Publication number
WO2012042922A1
WO2012042922A1 PCT/JP2011/054383 JP2011054383W WO2012042922A1 WO 2012042922 A1 WO2012042922 A1 WO 2012042922A1 JP 2011054383 W JP2011054383 W JP 2011054383W WO 2012042922 A1 WO2012042922 A1 WO 2012042922A1
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Prior art keywords
bca
data
optical information
recording
pit
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PCT/JP2011/054383
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French (fr)
Japanese (ja)
Inventor
貴清 安川
星沢　拓
大西　邦一
裕 永井
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日立コンシューマエレクトロニクス株式会社
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Publication of WO2012042922A1 publication Critical patent/WO2012042922A1/en

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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
    • 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
    • G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
    • G11B7/24085—Pits
    • 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
    • G11B7/261—Preparing a master, e.g. exposing photoresist, electroforming

Definitions

  • the present invention relates to an optical information medium, an optical information recording and reproducing apparatus, and an optical information recording and reproducing method.
  • BD Blu-ray Disc
  • BCA Burst Cutting Area
  • BCA formation can be realized by an easy method, and a detection method equivalent to the conventional BCA can be applied.
  • FIG. 2 is a structural diagram of a single-layer ROM disk used in the present embodiment.
  • FIG. 2 is a structural diagram of a two-layer ROM disk used in the present embodiment.
  • FIG. 2 is a structural diagram of a recording layer of a ROM disk used in the present embodiment.
  • FIG. 2 is an LDC block structural diagram of a disk used in the present embodiment.
  • FIG. 7 is a block diagram showing a first interleaving for an LDC block; The block diagram which shows the 2nd interleaving with respect to LDC block.
  • FIG. 2 is a structural diagram of address information of a disk used in the present embodiment.
  • FIG. 2 is a structural diagram of an access block of a disk used in the present embodiment.
  • FIG. 2 is a structural diagram of a BIS block of a disk used in the present embodiment.
  • FIG. 2 is a structural diagram of a BIS cluster of a disk used in the present embodiment. Structure of ECC cluster of disk used in this embodiment
  • FIG. 2 is a structural diagram of a recording frame of a disk used in the present embodiment.
  • FIG. 7 is a conversion diagram of 1-7 modulation used in the disk used in the present embodiment.
  • FIG. 2 is a structural view showing a position of BCA of a disk used in the present embodiment.
  • the conversion table which shows the modulation rule of BCA of the disc used for this embodiment.
  • FIG. 3 is a view showing a recording shape of BCA of a disk used in the present embodiment.
  • Pattern table of synchronization signal of BCA The block diagram of the ECC block of a BCA code.
  • FIG. 1 is a block diagram of an optical disc recording and reproducing apparatus used in the present embodiment.
  • FIG. 1 shows physical characteristics of a conventional BCA structure and its signal waveform.
  • A shows the physical structure, and random data is formed on the embossed portion which is the base portion by the modulation method according to the data area.
  • a cutting part is formed there using a BCA cutter etc. by a post process. By lowering the reflection level in this manner, “1” of the data pattern is formed, and the determination can be made based on the difference between “0” of the other embossed portions and the reflectance.
  • B shows the waveform actually reproduced.
  • the embossed portion is modulated with a data pattern, and a high frequency component is detected.
  • the cutting unit burns out the data pattern, the amount of reflected light is greatly reduced, and the reproduction signal intensity can be reduced to almost zero level.
  • (C) shows the signal waveform after passing through the reproduction LPF.
  • the data pattern is a signal of a high frequency component according to the user data area, and is detected as a signal center level.
  • the embossed portion is lower than I8H (the top level of the original waveform), and the cutting portion is detected near the zero level.
  • FIG. 2 shows physical characteristics of the BCA structure of the optical information medium used in the present embodiment, and the signal waveforms thereof.
  • the physical structure of (a) differs from that of the conventional BCA in that the portion forming the data pattern "0" has no mirror portion, that is, there is no light diffraction structure such as pits, and the structure has the highest reflected light amount.
  • the embossed portion constituting the data pattern "1" has the same physical structure as the embossed portion of the conventional BCA.
  • the embossed portion constituting the data pattern "1" has the same reflectance as that of the embossed portion of the data pattern "0" of the conventional BCA, and the signal level of the conventional BCA Have different waveforms.
  • the signal level is largely shifted from the center level of the high frequency signal of the data pattern to I8H.
  • the pit depth used for BCA is newly defined and can be detected similarly to the conventional BCA. Specifically, it is easiest to detect a change in the amount of reflected light by designing the pit depth to be approximately 1 ⁇ 4 of the laser wavelength. Although such a design makes it difficult to detect a push-pull signal, it can be implemented because it is not necessary to apply tracking servo in BCA reproduction.
  • the result of evaluating the pit shape is shown.
  • the change in the amount of reflected light that is, the condition under which the degree of signal modulation can be secured the most is examined.
  • the conditions were compared between pit length and pit width.
  • pit lengths are compared with continuous patterns of 2T length and continuous patterns of 8T length from the viewpoint of data modulation.
  • 1T is a channel clock.
  • FIG. 3 is a simulation result of a continuous pattern of 2T length.
  • A shows the amount of reflected light when the pit width is 0.16 ⁇ m, which is half the track pitch.
  • G / L respectively indicate the result of the groove or on-track state and the land or off-track state.
  • B shows a pit width of 0.21 ⁇ m, which is about half the spot size at which the amount of reflected light is minimized.
  • the signal level 1 is based on the mirror level and is shown as a relative light amount ratio. From these results, it can be seen that in the case of a continuous pattern of 2T length, when the pit width is 0.21 ⁇ m, the average amount of reflected light can be further reduced.
  • FIG. 4 is a simulation result of a continuous pattern of 8T length.
  • (A) and (b) are respectively the same as FIG.
  • the land portion (non-pit portion) is about 0.9, which is equivalent to the mirror portion.
  • FIG. 5 to 7 show an example of a pit structure BCA.
  • FIG. 5 shows a 2T continuous pattern
  • FIG. 6 shows an 8T continuous pattern
  • FIG. 7 shows a groove structure pattern in which the 8T continuous pattern is expanded.
  • the central portion of a long pit pattern is continuously present. That is, the pit-forming BCA which secures the same signal level as the conventional BCA and does not add a post process is not a pattern having lands as shown in FIGS. 5 and 6, but as shown in FIG. It can be seen that the BCA signal modulation degree can be secured by using a long pit pattern (groove structure).
  • the continuous patterns of 2T and 8T are compared for the sake of simplicity, but the present invention is not limited to this.
  • the length of the pit portion may be secured and the length of the land portion may be as short as possible, for example, BCA also in a pattern such as a combination of 8T pits and 2T lands. It is possible to relatively easily secure the modulation degree.
  • FIG. 8 shows a single-layer ROM (read only) disc.
  • FIG. 9 shows a dual layer ROM (read only) disc.
  • the single-layer ROM disk shown in FIG. 8 has a label side on which a label is written and a recording side on which a light beam for reproduction is incident. It comprises a cover layer for protecting the recording surface from the recording surface side, a recording layer on which a signal is recorded, and a base layer therebelow.
  • the two-layer ROM disk shown in FIG. 9 also has a label surface on which a label is written and a recording surface on which a light beam for reproduction is incident.
  • a cover layer for protecting the recording surface from the recording surface side a recording layer (L1) on which a signal is recorded, a space layer separating the other recording layer, a recording layer (L0 on which another signal is recorded) And the underlying layer below.
  • FIG. 10 schematically shows the cross section of the disk with the left side as the inner periphery and the right side as the outer periphery.
  • FIG. 10A shows the disk structure of the recording layer L0 of the single-layer ROM disk and the double-layer ROM disk.
  • FIG. 10B shows the disk structure of the recording layer L1 of the dual layer ROM disk.
  • L0 disc structure 1001 is a BCA, and information unique to the disc is recorded.
  • Reference numeral 1002 denotes an inner zone 0 in which information on attributes of the disc, control information, and the like are recorded. Also called Lead-in.
  • Reference numeral 1003 denotes Data Zone 0, in which user data such as AV data is recorded.
  • Reference numeral 1004 denotes Outer Zone 0 in which control information and the like are recorded.
  • Inner Zone 0 (1002) includes Protection Zone 1 (1005), PIC (1006), Protection Zone 2 (1007), INFO 02 (1008), reseved (1009), and INFO 01 (1010).
  • Protection Zone 1 (1005) is an area for separating BCA (1001) and PIC (1006).
  • PIC has information on disk type, information on disk size, information on disk version, information on disk structure, information on channel bit length, information on presence or absence of BCA, and maximum application. Information on the transmission rate is recorded. Protection Zone 2 (1007) is an area for separating PIC (1006) and INFO 02 (1008). Control information is recorded in INFO 02 (1008). reseved (1009) is a spare area. Control information is recorded in INFO01 (1010). Outer zone 0 (1004) is composed of INFO 3/4 (1011) and Protection Zone 3 (1012). Control information is recorded in INFO 3/4 (1011). Protection Zone 3 (1012) further separates INFO 3/4 (1011) from the outer peripheral portion. In FIG.
  • the arrow from the inner periphery to the outer periphery of the L0 disk structure is recorded such that the recording layers L0 of the single layer ROM disk and the dual layer ROM disk are read from the inner periphery toward the outer periphery.
  • FIG. 10B L1 disc structure
  • 1014 is Inner Zone 1, and information on attributes of the disc, control information and the like are recorded therein. Also called Lead-out. 1015 is Data Zone 0, and user data such as AV data is recorded. Reference numeral 1016 denotes Outer Zone 1 in which control information and the like are recorded.
  • Inner Zone 1 (1014) consists of Protection Zone 1 (1017), PIC (1018), Protection Zone 2 (1019), INFO 02 (1020), reseved (1021), INFO 01 (1022).
  • Protection Zone 1 (1017) is an area for separating the PIC (1018) from the inner circumference side.
  • the PIC (1018) has information on the type of disc, information on disc size, information on disc version, information on disc structure, information on channel bit length, information on presence or absence of BCA, and maximum application. Information on the transmission rate is recorded. Protection Zone 2 (1019) is an area for separating PIC (1018) and INFO 02 (1020). Control information is recorded in INFO 02 (1020). reseved (1021) is a spare area. Control information is recorded in INFO01 (1022). Outer Zone 1 (1016) is composed of INFO 3/4 (1023) and Protection Zone 3 (1024). Control information is recorded in INFO 3/4 (1023). Protection Zone 3 (1024) further separates INFO 3/4 (1023) from the outer peripheral portion.
  • the arrow from the outer periphery to the inner periphery of the L1 disk structure in FIG. 10B indicates that the recording layer L1 of the dual layer ROM disk is recorded so as to be read from the outer periphery toward the inner periphery.
  • [Data encoding process] The recording process of user data will be described. As shown in FIG. 11, the user data is divided into 2048-byte units, and 4-byte error detection codes are added to each to form a 2052-byte data frame. Next, scramble processing is performed on each data frame as shown in FIG. 12 to construct a scrambled data frame. Next, as shown in FIG. 12, 32 scrambled data frames are collected. Next, rearrangement is performed in order of columns, and data blocks of 216 rows and 304 columns are configured as shown in FIG. Then, as shown in FIG.
  • each column of the data block is encoded with Reed-Solomon code of (248, 216, 32), 32-byte parity is added, and a new LDC of 248 rows and 304 columns (Long) is added. Construct a Distant Code block.
  • the next first interleaving and second interleaving are processed for the LDC block. As shown in FIG. 15A, the first interleaving rearranges data in even-numbered columns and data in subsequent odd-numbered columns alternately to form a block of 496 rows and 152 columns. For the second interleaving, the first two rows are not shifted, and the next two rows are shifted three bytes to the left, in units of two rows from the top, as shown in FIG.
  • the next two rows are shifted by 6 bytes, the next two rows are shifted by 9 bytes to the left, and relocation is performed to increase the shift amount by 3 bytes.
  • the first interleaved data and the second interleaved data form an LDC cluster.
  • the address added to this data block is generated as follows. As shown in FIG. 16, the data block is divided into 16 address units, each of which is assigned 9 bytes of address information.
  • the 9-byte breakdown consists of 4-byte address, 1-byte flag information, and 4-byte address and parity added to the flag information.
  • the addresses are interleaved to form a matrix of 6 rows and 24 columns.
  • 18 bytes of user control data, 32 units, are arranged in a 24 ⁇ 24 matrix.
  • the matrix of 6 rows and 24 columns described above and the matrix of 24 rows and 24 columns are combined to form 30 rows and 24 columns of access blocks shown in FIG.
  • Each row of the access block is encoded with (62, 33, 32) Reed-Solomon code, added with 32-byte parity, and BIS (Burst Indicating Subcode) block of 62 rows and 24 columns shown in FIG.
  • BIS Burst Indicating Subcode
  • the LDC cluster is divided into 38 columns, and the data of the BIS cluster is inserted one by one between them to form an ECC cluster shown in FIG.
  • a 20-bit frame sync signal is added at the beginning, and the 155-byte data is divided into the first 25 bits and 45 bits thereafter, and DC control bits are inserted between them.
  • the recording frame shown in FIG. The DC control bit is controlled such that the DSV after modulation is close to zero.
  • the modulation of the data of the recording frame is performed by 17 modulation according to the table shown in FIG.
  • the frame synchronization signal is added using a 30-bit synchronization code as shown in FIG. In FIG. 23, # is 1 when the modulated data before the synchronization code is terminated at 0000 or 00, and is 0 otherwise.
  • BCA The arrangement of the BCA shown in FIG. 10 is a plan view seen from above the optical disk 2401 and is shown in FIG.
  • a burst cutting area (BCA) 2402 is formed concentrically in a range from a radius of 21.3 mm to 22.0 mm of the optical disc 2401.
  • Reference numeral 2403 denotes a center hole.
  • the BCA stores information unique to the disk such as a disk ID or format information to which the disk conforms. Such information occupies 4648 channel bits, while one round is approximately 4750 channel bits.
  • FIG. 25 A modulation method of data recorded in the burst cutting area 2402 is shown in FIG.
  • 2-bit data is modulated as 7-bit data.
  • the 7-bit data after modulation is configured such that the first 3 bits are a sync portion and the last 4 bits are a data portion.
  • the synchronization unit is composed only of "010".
  • "1" is set to any one of four bits, and the other bits are set to "0”.
  • FIG. 25 if the original data is "00", the data part is modulated as "1000”. Similarly, the original data "01”, "10” and “11” are modulated as data parts “0100", "0010” and "0001", respectively.
  • FIG. 2402 A state in which the synchronization part and the data part are recorded in the burst cutting area 2402 is schematically shown in FIG. In this case, data of "0101000" is shown. In the case of bit "1”, a low reflectance portion is formed. In the case of the bit "0”, this low reflectance portion is not formed, and the change in the disk reflectance is almost zero.
  • each row is composed of 5 bytes.
  • the first 1 byte of each row is a sync byte, and the last 4 bytes are data.
  • the first line is a preamble, which is all 00h.
  • the first synchronization byte is used only for the first line, it is possible to detect the start position of the BCA code by detecting this. Alternatively, it is possible to detect together with 00h data after the first synchronization byte.
  • the area is divided in units of four lines.
  • 16-byte data of user data I0,0 to I0,15 are arranged.
  • 16-byte parity C0,0 to C0,15 corresponding to user data I0,0 to I0,15 in the second to fifth lines. Is placed.
  • One ECC block is configured by the user data of the second to fifth lines and the parity of the sixth to ninth lines.
  • user data I1,0 to I1,15 are arranged in the tenth to thirteenth rows, and parities C1,0 to C1,15 corresponding to the fourteenth to seventeenth rows are arranged.
  • User data I2, 0 to I2, 15 are arranged on the 18th to 21st lines, and parity C2, 0 to C2, 15 corresponding to the 22nd to 25th lines are arranged.
  • User data I3, 0 to I3, 15 are arranged on the 26th to 29th lines, and parity C3, 0 to C3, 15 corresponding to the 30th to 33rd lines are arranged.
  • the synchronization bytes in the second to fifth lines are SB00.
  • the synchronization byte from the sixth line to the ninth line is SB01.
  • the synchronization byte from the 10th line to the 13th line is SB02.
  • the synchronization byte from the 14th line to the 17th line is SB03.
  • the synchronization byte from the 18th line to the 21st line is SB10.
  • the synchronization byte from the 22nd line to the 25th line is SB11.
  • the synchronization byte from the 26th line to the 29th line is SB12.
  • the synchronization byte from the 30th line to the 33rd line is SB13. No data is placed on the 34th line, and only SB 32 of the synchronization byte is placed. Data in FIG.
  • FIG. 27 shows data before being modulated according to the modulation scheme in FIG.
  • a specific data string of the synchronization signal of FIG. 27 is shown in FIG.
  • the example of FIG. 28 is represented as a channel bit string after modulation.
  • the synchronization byte of 28 channel bits comprises a sync body of 14 channel bits and a sync ID of 14 channel bits.
  • the sync body of 14 channel bits is composed of a sync body 1 of 7 channel bits and a sync body 2 of 7 channel bits.
  • the sync ID of 14 channel bits is formed of a sync ID 1 of 7 channel bits and a sync ID 2 of 7 channel bits.
  • the sink body has a pattern that does not follow the original modulation rule described above. That is, as shown in FIG. 25, according to the present modulation rule, the synchronization part should be "010". However, the synchronization portion of the sync body 2 is "001" different from "010". Thus, it is possible to identify synchronization bytes from the data.
  • the sync body 1 of each synchronization byte is set to "010 0001", and the sync body 2 is set to "001 0100".
  • the sync ID is a different value for each synchronization byte, which makes it possible to identify the synchronization byte. In this way, each synchronization byte is different, so that identification is possible.
  • the configuration of the ECC block of the BCA code is shown in FIG.
  • Reed Solomon code of RS (248, 216, 33) is used. This is a Reed Solomon code similar to the ECC block of FIG.
  • the first 200 bytes are fixed data, and, for example, FFh is used.
  • the 16-byte data following the fixed data is substantially used as BCA user data. Using 200 bytes of fixed data and 16 bytes of BCA data, 36 bytes of parity are calculated.
  • the first 200 bytes are fixed data and are not recorded on the optical disc.
  • the 32 bytes of parity only the first 16 bytes of parity C0 to C15 are recorded on the optical disc 1, and the remaining 16 bytes of parity are not recorded.
  • the same value is used as fixed data of 200 bytes.
  • 16-byte parity not recorded is decoded as an erasure flag. That is, of the 32-byte parity, the latter 16 bytes are processed as if the located parity was lost. Even if one half of the parity is lost, the original parity can be decoded because its position is known.
  • FIG. 30 shows the configuration of the data block of BCA.
  • four ECC blocks are recorded in the burst cutting area 2402.
  • the 16-byte data of each ECC block is composed of the leading 1-byte content code and the subsequent 15-byte content data.
  • the content code of BCA six bits from the first bit 7 to bit 2 are set as an application ID, and two bits of the last bit 1 and bit 0 are set as a sequence number.
  • the optical disk recording and reproducing apparatus can record or reproduce data only on an optical disk having an agreed application ID. For example, it is possible to record content encryption / decryption key information and the like necessary for protecting content data on a disc having a specific application ID.
  • the sequence number is composed of 2 bits and is any one of "00", “01", “10” and "11". When the content data of each ECC block is 14 bytes or less, each sequence number is set to "00".
  • the sequence number of each ECC block is "00". That is, when the same content data is recorded, the sequence numbers of the two ECC blocks are the same.
  • the first sequence number is “00”, and the sequence of the second ECC block is stored.
  • the number is "01”. That is, when straddling a plurality of ECC blocks, serial numbers are stored.
  • the BCA content code and content data of the data block in FIG. 30 correspond to I0,0 to I0,15 in the first ECC block in FIG.
  • FIG. 31 is a block diagram of a recording and reproducing apparatus.
  • 3100 is a read-only disc shown in FIGS. 8, 9, 10, or a recordable disc having a substantially common shape.
  • Reference numeral 3101 denotes a disk motor for rotating the disk 3100.
  • Reference numeral 3102 denotes an optical pickup for irradiating the disk 3100 with a laser beam and detecting reflected light to obtain a reproduction signal.
  • recording is performed by irradiating the disk 3100 with laser light of a waveform shaped properly at the time of recording.
  • An analog front end 3103 performs waveform shaping of a signal detected by the optical pickup 3102 and generation of a servo signal.
  • a demodulation processing circuit 3104 performs binarization of the waveform-shaped signal, demodulation processing based on 1-7 modulation described in the data encoding processing, and the like.
  • Reference numeral 3105 denotes a dynamic random access memory (DRAM), which is used for temporary storage of data subjected to demodulation processing, during correction processing, input / output data, data before modulation processing, and the like.
  • DRAM dynamic random access memory
  • An error correction circuit (ECC) 3106 performs error correction processing on the demodulated data temporarily stored in the DRAM 3105 during reproduction processing, and an error for input data temporarily stored in the DRAM 3105 during recording processing. Add a correction code.
  • An interface circuit 3107 outputs data temporarily stored in the DRAM 105 from the output terminal 3114, stores input data from the input terminal 3113 in the DRAM 3105, and outputs an output terminal 3115 of BCA related information stored in the DRAM 3105. Perform interface processing such as output of. 3113 and 3115 can also be shared. Moreover, it is also possible to share 3311, 3114, and 3115 by making them bidirectional.
  • a modulation circuit 3108 performs modulation processing based on 1-7 modulation described in the data encoding processing for data read from the DRAM 3105 at the time of recording, and supplies the modulation data to an LDD (Laser Diode Driver) 3109. Do.
  • the LDD 3109 supplies a recording waveform suitable for recording to the optical pickup 3102 for modulation data, and the pickup 3102 emits light in accordance with the recording waveform to perform recording.
  • a BCA decoder 3110 decodes BCA data blocks recorded according to the presence or absence of low reflectance as described in [BCA] at the time of BCA reproduction.
  • the present invention is not limited to the above-described embodiment, but includes various modifications.
  • the above-described embodiment is described in detail to explain the present invention in an easy-to-understand manner, and is not necessarily limited to one having all the described configurations.
  • part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment.
  • each of the configurations described above may be configured such that part or all of them are configured by hardware or implemented by executing a program by a processor.
  • control lines and information lines indicate what is considered to be necessary for the description, and not all control lines and information lines in the product are necessarily shown. In practice, almost all configurations may be considered to be mutually connected.

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  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)

Abstract

Writing of BCA data has conventionally been performed by a BCA cutter after formation of a user data area. However, with this type of method, it has been necessary to provide an individual step for BCA formation among the disk manufacturing steps, so that from the perspectives of manufacturing man-hours and, additionally, manufacturing cost of discs, the burden upon disc manufacturers had been significant. By using a pit formation method similar to that for the user data area, it is possible to reduce the steps for BCA manufacture. Furthermore, by setting the pit depth of the BCA portion to approximately 1/4 of the wavelength of the recording and playback laser, it is possible to increase the modulation depth of the BCA portion so as to allow application of a detection method equivalent to that for a conventional BCA.

Description

光情報媒体、光情報記録再生装置及び光情報記録再生方法Optical information medium, optical information recording and reproducing apparatus, and optical information recording and reproducing method
　本発明は、光情報媒体、光情報記録再生装置及び光情報記録再生方法に関する。 The present invention relates to an optical information medium, an optical information recording and reproducing apparatus, and an optical information recording and reproducing method.
　従来の光ディスク、例えばＢｌｕ－ｒａｙ　Ｄｉｓｃ（ＢＤ）などにおいては、ユーザデータ領域に格納されているデータの管理及びその著作権の保護のために、光ディスクの内周にはＢｕｒｓｔ　Ｃｕｔｔｉｎｇ　Ａｒｅａ（ＢＣＡ）が設けられている。ＢＣＡに関する技術としては、例えば特許文献１、特許文献２などに開示されている。 In a conventional optical disc, for example, Blu-ray Disc (BD), a Burst Cutting Area (BCA) is provided on the inner circumference of the optical disc to manage data stored in the user data area and protect its copyright. It is provided. The technology relating to BCA is disclosed, for example, in Patent Document 1 and Patent Document 2.
特開２０００－１４９４２３号公報JP 2000-149423 A 特開２００１－０４３５３３号公報JP, 2001-043533, A
　ＢＣＡデータの書き込みは従来、ユーザデータ領域の形成後にＢＣＡカッター等によって行われていた。しかし、このような方法では、ディスク製造工程にＢＣＡ形成用に個別の工程を設けざるを得ず、ディスクの生産工数、更には製造コストの観点で、ディスク生産者の負荷が大きい。 Conventionally, writing of BCA data has been performed by a BCA cutter or the like after the formation of the user data area. However, in such a method, it is necessary to provide a separate process for BCA formation in the disc manufacturing process, and the load on the disc producer is large in terms of the number of disc manufacturing steps and further the manufacturing cost.
　上記課題は特許請求の範囲に記載の発明により解決される。 The above problems are solved by the invention described in the claims.
　本発明によれば、容易な方法でＢＣＡ形成が実現でき、従来のＢＣＡと同等の検出方法が適用可能となる。 According to the present invention, BCA formation can be realized by an easy method, and a detection method equivalent to the conventional BCA can be applied.
従来のＢＣＡ構造、及びその信号波形を示す図。The figure which shows the conventional BCA structure, and its signal waveform. 本実施形態に用いるＢＣＡ構造、及びその信号波形を示す図。The figure which shows the BCA structure used for this embodiment, and its signal waveform. ２Ｔ長の連続パターンのシミュレーション結果を示す図。The figure which shows the simulation result of the continuous pattern of 2T length. ８Ｔ長の連続パターンのシミュレーション結果を示す図。The figure which shows the simulation result of the continuous pattern of 8 T length. ピット構造のＢＣＡのパターンを示す図。The figure which shows the pattern of BCA of a pit structure. ピット構造のＢＣＡの別のパターンを示す図。The figure which shows another pattern of BCA of a pit structure. ピット構造のＢＣＡの更に別のパターンを示す図。The figure which shows another pattern of BCA of a pit structure. 本実施形態に用いる１層ＲＯＭディスクの構造図。FIG. 2 is a structural diagram of a single-layer ROM disk used in the present embodiment. 本実施形態に用いる２層ＲＯＭディスクの構造図。FIG. 2 is a structural diagram of a two-layer ROM disk used in the present embodiment. 本実施形態に用いるＲＯＭディスクの記録層の構造図。FIG. 2 is a structural diagram of a recording layer of a ROM disk used in the present embodiment. 本実施形態に用いるディスクのデータフレーム構造図。The data frame structure figure of the disc used for this embodiment. 本実施形態に用いるディスクのスクランブルドデータフレーム構造図。The scrambled data frame structure figure of the disc used for this embodiment. 本実施形態に用いるディスクの２１６行３０４列のデータブロック構成図。The data block block diagram of 216 rows 304 columns of the disk used for this embodiment. 本実施形態に用いるディスクのＬＤＣブロック構造図。FIG. 2 is an LDC block structural diagram of a disk used in the present embodiment. ＬＤＣブロックに対する第１のインターリーブを示す構成図。FIG. 7 is a block diagram showing a first interleaving for an LDC block; ＬＤＣブロックに対する第２のインターリーブを示す構成図。The block diagram which shows the 2nd interleaving with respect to LDC block. 本実施形態に用いるディスクのアドレス情報の構造図。FIG. 2 is a structural diagram of address information of a disk used in the present embodiment. 本実施形態に用いるディスクのアクセスブロックの構造図。FIG. 2 is a structural diagram of an access block of a disk used in the present embodiment. 本実施形態に用いるディスクのＢＩＳブロックの構造図。FIG. 2 is a structural diagram of a BIS block of a disk used in the present embodiment. 本実施形態に用いるディスクのＢＩＳクラスタの構造図。FIG. 2 is a structural diagram of a BIS cluster of a disk used in the present embodiment. 本実施形態に用いるディスクのＥＣＣクラスタの構造図Structure of ECC cluster of disk used in this embodiment 本実施形態に用いるディスクの記録フレームの構造図。FIG. 2 is a structural diagram of a recording frame of a disk used in the present embodiment. 本実施形態に用いるディスクで用いられる１－７変調の変換図。FIG. 7 is a conversion diagram of 1-7 modulation used in the disk used in the present embodiment. 同期フレームの同期信号パターン表。Sync signal pattern table of sync frame. 本実施形態に用いるディスクのＢＣＡの位置を示す構造図。FIG. 2 is a structural view showing a position of BCA of a disk used in the present embodiment. 本実施形態に用いるディスクのＢＣＡの変調則を示す変換表。The conversion table which shows the modulation rule of BCA of the disc used for this embodiment. 本実施形態に用いるディスクのＢＣＡの記録形状を示す図。FIG. 3 is a view showing a recording shape of BCA of a disk used in the present embodiment. 本実施形態に用いるディスクのＢＣＡのデータ構造図。The data structure figure of BCA of the disc used for this embodiment. ＢＣＡの同期信号のパターン表。Pattern table of synchronization signal of BCA. ＢＣＡコードのＥＣＣブロックの構成図。The block diagram of the ECC block of a BCA code. ＢＣＡのデータブロックの構成図。The block diagram of the data block of BCA. 本実施形態に用いる光ディスク記録再生装置のブロック図。FIG. 1 is a block diagram of an optical disc recording and reproducing apparatus used in the present embodiment.
 [光情報媒体]
　本実施形態に用いる光情報媒体について説明する。なお、説明を簡単にするため、本実施形態においては、ＢＤのシステムを前提とする。図１は従来のＢＣＡ構造の物理特性、及びその信号波形を示す。（ａ）は物理構造を示しており、ベース部分であるエンボス部にはデータ領域に準じた変調方法でランダムデータが形成されている。そこに後工程でＢＣＡカッター等を用いて、カッティング部を形成する。このように反射レベルを下げることで、データパターンの“１”を構成し、その他のエンボス部の“０”と反射率の差異で判定が可能となる。（ｂ）は実際に再生した波形を示す。エンボス部はデータパターンで変調されており、高周波成分が検出される。また、カッティング部はデータパターンを焼き切り、反射光量が大きく低下し、ほぼゼロレベル近くまで再生信号強度を下げることができる。（ｃ）は再生用のＬＰＦを通過した後の信号波形を示している。データパターンはユーザデータ領域に準じた高周波成分の信号であり、信号中心レベルとして検出される。その結果、エンボス部はＩ８Ｈ（元波形のトップレベル）よりも下がり、カッティング部はゼロレベル近くで検出されることになる。 [Optical information medium]
The optical information medium used in the present embodiment will be described. In addition, in order to simplify the description, in the present embodiment, a BD system is assumed. FIG. 1 shows physical characteristics of a conventional BCA structure and its signal waveform. (A) shows the physical structure, and random data is formed on the embossed portion which is the base portion by the modulation method according to the data area. A cutting part is formed there using a BCA cutter etc. by a post process. By lowering the reflection level in this manner, “1” of the data pattern is formed, and the determination can be made based on the difference between “0” of the other embossed portions and the reflectance. (B) shows the waveform actually reproduced. The embossed portion is modulated with a data pattern, and a high frequency component is detected. In addition, the cutting unit burns out the data pattern, the amount of reflected light is greatly reduced, and the reproduction signal intensity can be reduced to almost zero level. (C) shows the signal waveform after passing through the reproduction LPF. The data pattern is a signal of a high frequency component according to the user data area, and is detected as a signal center level. As a result, the embossed portion is lower than I8H (the top level of the original waveform), and the cutting portion is detected near the zero level.
　続いて、図２は本実施形態に用いる光情報媒体のＢＣＡ構造の物理特性、及びその信号波形を示す。（ａ）の物理構造は従来ＢＣＡと異なり、データパターン“０”を構成する部分がミラー部、つまりピット等の光回折構造がなく、最も反射光量の高い構造となる。
データパターン“１”を構成するエンボス部は、従来ＢＣＡのエンボス部と同様の物理構造となる。
（ｂ）の再生波形でその差異が明確となるが、データパターン“１”を構成するエンボス部は従来ＢＣＡのデータパターン“０”のエンボス部と同様の反射率となり、従来ＢＣＡの信号レベルとは異なる波形となる。データパターン“０”であるミラー部も同様にデータパターンの高周波信号の中心レベルからＩ８Ｈへ信号レベルが大きくシフトすることになる。 Subsequently, FIG. 2 shows physical characteristics of the BCA structure of the optical information medium used in the present embodiment, and the signal waveforms thereof. The physical structure of (a) differs from that of the conventional BCA in that the portion forming the data pattern "0" has no mirror portion, that is, there is no light diffraction structure such as pits, and the structure has the highest reflected light amount.
The embossed portion constituting the data pattern "1" has the same physical structure as the embossed portion of the conventional BCA.
Although the difference becomes clear in the reproduced waveform of (b), the embossed portion constituting the data pattern "1" has the same reflectance as that of the embossed portion of the data pattern "0" of the conventional BCA, and the signal level of the conventional BCA Have different waveforms. Similarly, in the mirror portion having the data pattern "0", the signal level is largely shifted from the center level of the high frequency signal of the data pattern to I8H.
　そのため、本実施形態では、ＢＣＡに使用するピット深さを新たに規定し、従来のＢＣＡと同様に検出できるようにした。具体的には、ピット深さをレーザ波長の略１／４となるように設計することで、最も反射光量の変化を検出しやすい。なお、このような設計では、プッシュプル信号の検出が困難となるが、ＢＣＡの再生においては、トラッキングサーボをかけなくてもよいので、実現が可能である。 Therefore, in the present embodiment, the pit depth used for BCA is newly defined and can be detected similarly to the conventional BCA. Specifically, it is easiest to detect a change in the amount of reflected light by designing the pit depth to be approximately 1⁄4 of the laser wavelength. Although such a design makes it difficult to detect a push-pull signal, it can be implemented because it is not necessary to apply tracking servo in BCA reproduction.
　次に、ピット形状について評価した結果を示す。特に反射光量の変化つまり信号変調度が最も確保できる条件について検討した。条件はピット長と、ピット幅で比較検討した。 Next, the result of evaluating the pit shape is shown. In particular, the change in the amount of reflected light, that is, the condition under which the degree of signal modulation can be secured the most is examined. The conditions were compared between pit length and pit width.
　まず、ピット長はデータ変調の観点から、２Ｔ長の連続パターン、８Ｔ長の連続パターンで比較する。なお、１Ｔはチャネルクロックである。 First, pit lengths are compared with continuous patterns of 2T length and continuous patterns of 8T length from the viewpoint of data modulation. Note that 1T is a channel clock.
　図３は２Ｔ長の連続パターンのシミュレーション結果である。（ａ）はピット幅をトラックピッチの半分である０．１６μｍとした場合の反射光量を示す。Ｇ／Ｌはそれぞれグルーブつまりオントラック状態と、ランドつまりオフトラック状態の結果を示す。（ｂ）はピット幅を反射光量が極小となるスポットサイズの略半分である０．２１μｍの結果を示す。信号レベルの１はミラーレベルを基準とし、相対光量比として示す。これらの結果から、２Ｔ長の連続パターンの場合、ピット幅が０．２１μｍとした場合に、より平均反射光量を下げられることがわかる。 FIG. 3 is a simulation result of a continuous pattern of 2T length. (A) shows the amount of reflected light when the pit width is 0.16 μm, which is half the track pitch. G / L respectively indicate the result of the groove or on-track state and the land or off-track state. (B) shows a pit width of 0.21 μm, which is about half the spot size at which the amount of reflected light is minimized. The signal level 1 is based on the mirror level and is shown as a relative light amount ratio. From these results, it can be seen that in the case of a continuous pattern of 2T length, when the pit width is 0.21 μm, the average amount of reflected light can be further reduced.
　図４は８Ｔ長の連続パターンのシミュレーション結果である。（ａ）、（ｂ）はそれぞれ図３と同様である。８Ｔ長の連続パターンの場合、ピット中心部分（図中のＬｅｎｇｔｈ＝０）でオントラック、オフトラックによらず、ミラー部基準で、０．３以下となることがわかる。また、ランド部（非ピット部）はミラー部相当の０．９程度となる。この結果から、ＢＣＡ形成にピットパターンを使用する場合は、ピット部とランド部で信号強度が大きく変わり、ＢＣＡ再生用のＬＰＦを通過後には、全ての平均化が行われ、限りなく０．５付近に収束することとなる。 FIG. 4 is a simulation result of a continuous pattern of 8T length. (A) and (b) are respectively the same as FIG. In the case of a continuous pattern of 8T length, it can be seen that it becomes 0.3 or less on the basis of the mirror portion regardless of on-track and off-track in the pit center portion (Length = 0 in the figure). Also, the land portion (non-pit portion) is about 0.9, which is equivalent to the mirror portion. From this result, when using a pit pattern for BCA formation, the signal strength largely changes between the pit part and the land part, and after passing through the LPF for BCA reproduction, all averaging is performed, and the limit is 0.5 without limit. It will converge to the vicinity.
　図５から図７はピット構造のＢＣＡの例を示す。図５は２Ｔ連続パターン、図６は８Ｔ連続パターン、図７は８Ｔ連続パターンを拡張した溝構造パターンである。図３，４の条件から、よりＢＣＡの変調度が確保できるピットパターンとしては、長いピットパターンの中央部が連続的に存在する場合であると言える。つまり、従来のＢＣＡと同様の信号レベルを確保し、且つ後工程を追加しないピット形成型のＢＣＡには、図５，図６のようにランド部があるようなパターンではなく、図７のように長いピットパターン（溝構造）とすることによって、ＢＣＡ信号変調度が確保できることがわかる。 5 to 7 show an example of a pit structure BCA. FIG. 5 shows a 2T continuous pattern, FIG. 6 shows an 8T continuous pattern, and FIG. 7 shows a groove structure pattern in which the 8T continuous pattern is expanded. From the conditions of FIGS. 3 and 4, it can be said that as a pit pattern which can ensure the modulation degree of BCA, the central portion of a long pit pattern is continuously present. That is, the pit-forming BCA which secures the same signal level as the conventional BCA and does not add a post process is not a pattern having lands as shown in FIGS. 5 and 6, but as shown in FIG. It can be seen that the BCA signal modulation degree can be secured by using a long pit pattern (groove structure).
　なお、本実施形態の説明においては、簡単のために２Ｔ，８Ｔの連続パターンで比較したが、これに制限されるものではない。例えば、溝構造の実現が困難である場合は、ピット部の長さを確保し、ランド部の長さをできるだけ短くすればよく、例えば、８Ｔピットと２Ｔランドの組み合わせのようなパターンにおいてもＢＣＡ変調度を比較的容易に確保することが可能である。 In the description of the present embodiment, the continuous patterns of 2T and 8T are compared for the sake of simplicity, but the present invention is not limited to this. For example, when it is difficult to realize the groove structure, the length of the pit portion may be secured and the length of the land portion may be as short as possible, for example, BCA also in a pattern such as a combination of 8T pits and 2T lands. It is possible to relatively easily secure the modulation degree.
　[ディスクの形状]
  本実施形態に用いる再生専用ディスクの形状について説明する。図８に１層ＲＯＭ（再生専用）ディスクを示す。また、図９は２層ＲＯＭ（再生専用）ディスクを示す。図８に示される１層ＲＯＭディスクにはレーベルが書かれる側のレーベル面と、再生するための光ビームが入射する側の記録面が存在する。記録面側から記録面を保護するカバー層、信号が記録されている記録層、そしてその下の基盤層からなる。図９に示される２層ＲＯＭディスクにもレーベルが書かれる側のレーベル面と、再生するための光ビームが入射する側の記録面が存在する。記録面側から記録面を保護するカバー層、信号が記録されている記録層（Ｌ１）、もう一つの記録層との間を隔てるスペース層、もう一つの信号が記録されている記録層（Ｌ０）そしてその下の基盤層からなる。 Disc shape
The shape of the read-only disc used in the present embodiment will be described. FIG. 8 shows a single-layer ROM (read only) disc. FIG. 9 shows a dual layer ROM (read only) disc. The single-layer ROM disk shown in FIG. 8 has a label side on which a label is written and a recording side on which a light beam for reproduction is incident. It comprises a cover layer for protecting the recording surface from the recording surface side, a recording layer on which a signal is recorded, and a base layer therebelow. The two-layer ROM disk shown in FIG. 9 also has a label surface on which a label is written and a recording surface on which a light beam for reproduction is incident. A cover layer for protecting the recording surface from the recording surface side, a recording layer (L1) on which a signal is recorded, a space layer separating the other recording layer, a recording layer (L0 on which another signal is recorded) And the underlying layer below.
　次に１層ＲＯＭディスク及び２層ＲＯＭディスクの記録層の構造を図１０に示す。図１０はディスク断面を左側を内周、右側を外周とし模式的にあらわしたものである。図１０（ａ）Ｌ０ディスク構造は、１層ＲＯＭディスク及び２層ＲＯＭディスクの記録層Ｌ０のディスク構造を示す。図１０（ｂ）Ｌ１ディスク構造は、２層ＲＯＭディスクの記録層Ｌ１のディスク構造を示す。 Next, the structure of the recording layer of the single layer ROM disk and the double layer ROM disk is shown in FIG. FIG. 10 schematically shows the cross section of the disk with the left side as the inner periphery and the right side as the outer periphery. FIG. 10A shows the disk structure of the recording layer L0 of the single-layer ROM disk and the double-layer ROM disk. FIG. 10B shows the disk structure of the recording layer L1 of the dual layer ROM disk.
　図１０（ａ）Ｌ０ディスク構造において、１００１はＢＣＡであり、ディスク固有の情報等が記録されている。１００２はＩｎｎｅｒ　Ｚｏｎｅ０であり、ディスクに関する属性の情報や制御情報等が記録されている。Ｌｅａｄ-ｉｎとも称する。１００３はＤａｔａ　Ｚｏｎｅ０であり、ＡＶデータなどのユーザデータが記録されている。１００４はＯｕｔｅｒ　Ｚｏｎｅ０であり制御情報などが記録されている。Ｉｎｎｅｒ　Ｚｏｎｅ０（１００２）は、Ｐｒｏｔｅｃｔｉｏｎ　Ｚｏｎｅ１（１００５）、ＰＩＣ（１００６）、Ｐｒｏｔｅｃｔｉｏｎ　Ｚｏｎｅ２（１００７）、ＩＮＦＯ０２（１００８）、ｒｅｓｅｖｅｄ（１００９）、ＩＮＦＯ０１（１０１０）からなる。Ｐｒｏｔｅｃｔｉｏｎ　Ｚｏｎｅ１（１００５）はＢＣＡ（１００１）とＰＩＣ（１００６）を隔てるための領域である。ＰＩＣ(１００６)はディスクのタイプに関する情報や、ディスクのサイズに関する情報や、ディスクのバージョンに関する情報や、ディスクの構造に関する情報や、チャネルビット長に関する情報や、ＢＣＡの有無に関する情報や、適用の最大伝送速度に関する情報などが記録されている。Ｐｒｏｔｅｃｔｉｏｎ　Ｚｏｎｅ２（１００７）は、ＰＩＣ（１００６）とＩＮＦＯ０２（１００８）を隔てるための領域である。ＩＮＦＯ０２（１００８）には制御情報が記録されている。ｒｅｓｅｖｅｄ（１００９）は予備の領域である。ＩＮＦＯ０１（１０１０）には制御情報が記録されている。Ｏｕｔｅｒ　Ｚｏｎｅ０（１００４）は、ＩＮＦＯ３／４（１０１１）とＰｒｏｔｅｃｔｉｏｎ　Ｚｏｎｅ３（１０１２）からなる。ＩＮＦＯ３／４（１０１１）には制御情報が記録されている。Ｐｒｏｔｅｃｔｉｏｎ　Ｚｏｎｅ３（１０１２）はＩＮＦＯ３／４（１０１１）を更に外周部分と隔てる。図１０（ａ）Ｌ０ディスク構造の内周から外周に向かっての矢印は、１層ＲＯＭディスク及び２層ＲＯＭディスクの記録層Ｌ０は内周から外周に向かってＲｅａｄするように記録されていることを示す。 In FIG. 10A (a) L0 disc structure, 1001 is a BCA, and information unique to the disc is recorded. Reference numeral 1002 denotes an inner zone 0 in which information on attributes of the disc, control information, and the like are recorded. Also called Lead-in. Reference numeral 1003 denotes Data Zone 0, in which user data such as AV data is recorded. Reference numeral 1004 denotes Outer Zone 0 in which control information and the like are recorded. Inner Zone 0 (1002) includes Protection Zone 1 (1005), PIC (1006), Protection Zone 2 (1007), INFO 02 (1008), reseved (1009), and INFO 01 (1010). Protection Zone 1 (1005) is an area for separating BCA (1001) and PIC (1006). PIC (1006) has information on disk type, information on disk size, information on disk version, information on disk structure, information on channel bit length, information on presence or absence of BCA, and maximum application. Information on the transmission rate is recorded. Protection Zone 2 (1007) is an area for separating PIC (1006) and INFO 02 (1008). Control information is recorded in INFO 02 (1008). reseved (1009) is a spare area. Control information is recorded in INFO01 (1010). Outer zone 0 (1004) is composed of INFO 3/4 (1011) and Protection Zone 3 (1012). Control information is recorded in INFO 3/4 (1011). Protection Zone 3 (1012) further separates INFO 3/4 (1011) from the outer peripheral portion. In FIG. 10 (a), the arrow from the inner periphery to the outer periphery of the L0 disk structure is recorded such that the recording layers L0 of the single layer ROM disk and the dual layer ROM disk are read from the inner periphery toward the outer periphery. Indicates
　図１０（ｂ）Ｌ１ディスク構造において、１０１４はＩｎｎｅｒ　Ｚｏｎｅ１であり、ディスクに関する属性の情報や制御情報等が記録されている。Ｌｅａｄ-ｏｕｔとも称する。１０１５はＤａｔａ　Ｚｏｎｅ０であり、ＡＶデータなどのユーザデータが記録されている。１０１６はＯｕｔｅｒ　Ｚｏｎｅ１であり制御情報などが記録されている。Ｉｎｎｅｒ　Ｚｏｎｅ１（１０１４）は、Ｐｒｏｔｅｃｔｉｏｎ　Ｚｏｎｅ１（１０１７）、ＰＩＣ（１０１８）、Ｐｒｏｔｅｃｔｉｏｎ　Ｚｏｎｅ２（１０１９）、ＩＮＦＯ０２（１０２０）、ｒｅｓｅｖｅｄ（１０２１）、ＩＮＦＯ０１（１０２２）からなる。Ｐｒｏｔｅｃｔｉｏｎ　Ｚｏｎｅ１（１０１７）はより内周側とＰＩＣ（１０１８）を隔てるための領域である。ＰＩＣ(１０１８)はディスクのタイプに関する情報や、ディスクのサイズに関する情報や、ディスクのバージョンに関する情報や、ディスクの構造に関する情報や、チャネルビット長に関する情報や、ＢＣＡの有無に関する情報や、適用の最大伝送速度に関する情報などが記録されている。Ｐｒｏｔｅｃｔｉｏｎ　Ｚｏｎｅ２（１０１９）は、ＰＩＣ（１０１８）とＩＮＦＯ０２（１０２０）を隔てるための領域である。ＩＮＦＯ０２（１０２０）には制御情報が記録されている。ｒｅｓｅｖｅｄ（１０２１）は予備の領域である。ＩＮＦＯ０１（１０２２）には制御情報が記録されている。Ｏｕｔｅｒ　Ｚｏｎｅ１（１０１６）は、ＩＮＦＯ３／４（１０２３）とＰｒｏｔｅｃｔｉｏｎ　Ｚｏｎｅ３（１０２４）からなる。ＩＮＦＯ３／４（１０２３）には制御情報が記録されてい
る。Ｐｒｏｔｅｃｔｉｏｎ　Ｚｏｎｅ３（１０２４）はＩＮＦＯ３／４（１０２３）を更に外周部分と隔てる。図１０（ｂ）Ｌ１ディスク構造の外周から内周に向かっての矢印は、２層ＲＯＭディスクの記録層Ｌ１は外周から内周に向かってＲｅａｄするように記録されていることを示す。 In FIG. 10B (b) L1 disc structure, 1014 is Inner Zone 1, and information on attributes of the disc, control information and the like are recorded therein. Also called Lead-out. 1015 is Data Zone 0, and user data such as AV data is recorded. Reference numeral 1016 denotes Outer Zone 1 in which control information and the like are recorded. Inner Zone 1 (1014) consists of Protection Zone 1 (1017), PIC (1018), Protection Zone 2 (1019), INFO 02 (1020), reseved (1021), INFO 01 (1022). Protection Zone 1 (1017) is an area for separating the PIC (1018) from the inner circumference side. The PIC (1018) has information on the type of disc, information on disc size, information on disc version, information on disc structure, information on channel bit length, information on presence or absence of BCA, and maximum application. Information on the transmission rate is recorded. Protection Zone 2 (1019) is an area for separating PIC (1018) and INFO 02 (1020). Control information is recorded in INFO 02 (1020). reseved (1021) is a spare area. Control information is recorded in INFO01 (1022). Outer Zone 1 (1016) is composed of INFO 3/4 (1023) and Protection Zone 3 (1024). Control information is recorded in INFO 3/4 (1023). Protection Zone 3 (1024) further separates INFO 3/4 (1023) from the outer peripheral portion. The arrow from the outer periphery to the inner periphery of the L1 disk structure in FIG. 10B indicates that the recording layer L1 of the dual layer ROM disk is recorded so as to be read from the outer periphery toward the inner periphery.
　[データのエンコード処理]
  ユーザデータの記録処理について説明する。図１１に示すとおり、ユーザデータを２０４８バイト単位に分割し、それぞれに４バイトの誤り検出コードを付加して２０５２バイトのデータフレームを構成する。次に、各データフレームに対し図１２に示すとおりスクランブル処理を行い、スクランブルドデータフレームを構成する。次に図１２に示すとおり、スクランブルドデータフレームを３２個集める。次に列順に再配置を行い、図１３に示すとおり２１６行３０４列のデータブロックを構成する。そして、図１４に示すとおり、データブロックの各列に対して(２４８，２１６，３２)のリードソロモン符号で符号化を行い、３２バイトのパリティを付加し新たに２４８行３０４列のＬＤＣ（Long Distant Code）ブロックを構成する。ＬＤＣブロックに対しては次の第１のインターリーブと、第２のインターリーブが処理される。第１のインターリーブは図１５ａに示されるように、偶数番目の列のデータとそれに続く奇数番目の列のデータを互い違いに挟み込むように再配置を行い４９６行１５２列のブロックを構成する。第２のインターリーブは図１５ｂ示すとおり、再配置された４９６行１５２列のブロックに対し、上から２行単位で、最初の２行はシフトせず、次の２行は左に３バイトシフト、次の２行は６バイトシフト、次の２行は左に９バイトシフトと３バイトずつシフト量を増加させる再配置を行う。第１のインターリーブ、第２のインターリーブを施したデータはＬＤＣクラスタを構成する。 [Data encoding process]
The recording process of user data will be described. As shown in FIG. 11, the user data is divided into 2048-byte units, and 4-byte error detection codes are added to each to form a 2052-byte data frame. Next, scramble processing is performed on each data frame as shown in FIG. 12 to construct a scrambled data frame. Next, as shown in FIG. 12, 32 scrambled data frames are collected. Next, rearrangement is performed in order of columns, and data blocks of 216 rows and 304 columns are configured as shown in FIG. Then, as shown in FIG. 14, each column of the data block is encoded with Reed-Solomon code of (248, 216, 32), 32-byte parity is added, and a new LDC of 248 rows and 304 columns (Long) is added. Construct a Distant Code block. The next first interleaving and second interleaving are processed for the LDC block. As shown in FIG. 15A, the first interleaving rearranges data in even-numbered columns and data in subsequent odd-numbered columns alternately to form a block of 496 rows and 152 columns. For the second interleaving, the first two rows are not shifted, and the next two rows are shifted three bytes to the left, in units of two rows from the top, as shown in FIG. The next two rows are shifted by 6 bytes, the next two rows are shifted by 9 bytes to the left, and relocation is performed to increase the shift amount by 3 bytes. The first interleaved data and the second interleaved data form an LDC cluster.
　一方、このデータブロックに付加されるアドレスは以下のように生成される。
図１６に示されるようにデータブロックは１６のアドレスユニットに分割され、それぞれに９バイトのアドレス情報が割り当てられる。９バイトの内訳は、４バイトのアドレスと、１バイトのフラグ情報と、４バイトのアドレスとフラグ情報に付加されたパリティとからなる。このアドレスはインターリーブ処理を行ったうえで、６行２４列のマトリックスを形成する。同時にユーザー制御データ１８バイト、３２ユニット分が２４行２４列のマトリックスに配置される。
上記の６行２４列のマトリックスと２４行２４列のマトリックスは結合され、図１７に示す３０行２４列のアクセスブロックを形成する。アクセスブロックの各列に対して（６２，３３，３２）のリードソロモン符号で符号化を行い、３２バイトのパリティを付加して図１８に示す、６２行２４列のＢＩＳ（Burst Indicating Subcode）ブロックを形成する。ＢＩＳブロックのデータに対し再配置を行い図１９に示す４９６行３列のＢＩＳクラスタを構成する。 On the other hand, the address added to this data block is generated as follows.
As shown in FIG. 16, the data block is divided into 16 address units, each of which is assigned 9 bytes of address information. The 9-byte breakdown consists of 4-byte address, 1-byte flag information, and 4-byte address and parity added to the flag information. The addresses are interleaved to form a matrix of 6 rows and 24 columns. At the same time, 18 bytes of user control data, 32 units, are arranged in a 24 × 24 matrix.
The matrix of 6 rows and 24 columns described above and the matrix of 24 rows and 24 columns are combined to form 30 rows and 24 columns of access blocks shown in FIG. Each row of the access block is encoded with (62, 33, 32) Reed-Solomon code, added with 32-byte parity, and BIS (Burst Indicating Subcode) block of 62 rows and 24 columns shown in FIG. Form Relocation is performed on the data of the BIS block to form a BIS cluster of 496 rows and 3 columns shown in FIG.
　前記のＬＤＣクラスタを３８列ずつに分割し、間にＢＩＳクラスタのデータを一列ずつ挿入し図２０に示すＥＣＣクラスタを構成する。 The LDC cluster is divided into 38 columns, and the data of the BIS cluster is inserted one by one between them to form an ECC cluster shown in FIG.
　ＥＣＣクラスタの各行１５５バイトのデータに対しては、先頭に２０ビットのフレーム同期信号が付加し、１５５バイトのデータは先頭２５ビット、以降は４５ビットずつに分割し、間にＤＣコントロールビットを挿入し、図２１に示す記録フレームを構成する。ＤＣコントロールビットは変調後のＤＳＶが０に近くなるように制御される。 For each 155-byte data in each row of the ECC cluster, a 20-bit frame sync signal is added at the beginning, and the 155-byte data is divided into the first 25 bits and 45 bits thereafter, and DC control bits are inserted between them. The recording frame shown in FIG. The DC control bit is controlled such that the DSV after modulation is close to zero.
　記録フレームのデータに対する変調は図２２に示されるテーブルに従って１７変調を行う。フレーム同期信号は図２３に示されるように３０bitsの同期コードを用いて付加される。図２３において、＃は同期コードの前の変調後のデータが0000もしくは00で終端された場合は１となり、他の場合は０となる。 The modulation of the data of the recording frame is performed by 17 modulation according to the table shown in FIG. The frame synchronization signal is added using a 30-bit synchronization code as shown in FIG. In FIG. 23, # is 1 when the modulated data before the synchronization code is terminated at 0000 or 00, and is 0 otherwise.
　[ＢＣＡ]
  図１０で示されたＢＣＡの配置を、光ディスク２４０１の上から見た配置図で、図２４に示す。光ディスク２４０１の半径２１．３ｍｍから２２．０ｍｍまでの範囲には、同心円状にバーストカッティングエリア（ＢＣＡ）２４０２が形成される。また、２４０３はセンターホールである。このＢＣＡには、ディスクＩＤ等のディスク固有の情報もしくは、ディスクの準拠するフォーマット情報等が格納されている。こうした情報は１周が略４７５０チャネルビットであるのに対し、４６４８チャネルビットを占める。 [BCA]
The arrangement of the BCA shown in FIG. 10 is a plan view seen from above the optical disk 2401 and is shown in FIG. A burst cutting area (BCA) 2402 is formed concentrically in a range from a radius of 21.3 mm to 22.0 mm of the optical disc 2401. Reference numeral 2403 denotes a center hole. The BCA stores information unique to the disk such as a disk ID or format information to which the disk conforms. Such information occupies 4648 channel bits, while one round is approximately 4750 channel bits.
　バーストカッティングエリア２４０２に記録されるデータの変調方法を図２５に示す。本変調方式では、２ビットのデータが７ビットデータとして変調される。変調後の７ビットデータは、前半３ビットが同期部、後半４ビットがデータ部として構成される。同期部は“０１０”のみで構成される。データ部は４ビットのうちのいずれかのビットに“１”が設定され、それ以外のビットは“０”と設定される。図２５において、元データが“００”であれば、データ部が“１０００”と変調される。同様に元データ“０１”、“１０”、“１１”はそれぞれデータ部“０１００”、“００１０”、“０００１”と変調される。 A modulation method of data recorded in the burst cutting area 2402 is shown in FIG. In this modulation method, 2-bit data is modulated as 7-bit data. The 7-bit data after modulation is configured such that the first 3 bits are a sync portion and the last 4 bits are a data portion. The synchronization unit is composed only of "010". In the data part, "1" is set to any one of four bits, and the other bits are set to "0". In FIG. 25, if the original data is "00", the data part is modulated as "1000". Similarly, the original data "01", "10" and "11" are modulated as data parts "0100", "0010" and "0001", respectively.
　同期部とデータ部がバーストカッティングエリア２４０２に記録されている状態を模式的に図２６に示す。この場合、“０１０１０００”のデータを示している。ビット“１”の場合は、低反射率部が形成される。ビット“０”の場合はこの低反射率部が形成されずに、ディスク反射率の変化がほぼゼロとなる。 A state in which the synchronization part and the data part are recorded in the burst cutting area 2402 is schematically shown in FIG. In this case, data of "0101000" is shown. In the case of bit "1", a low reflectance portion is formed. In the case of the bit "0", this low reflectance portion is not formed, and the change in the disk reflectance is almost zero.
　バーストカッティングエリア２４０２に記録されるデータ構造を図２７に示す。図２７において、各行が５バイトで構成される。各行の先頭１バイトは同期バイトであり、後方４バイトがデータとされる。 The data structure recorded in the burst cutting area 2402 is shown in FIG. In FIG. 27, each row is composed of 5 bytes. The first 1 byte of each row is a sync byte, and the last 4 bytes are data.
　第１行目はプリアンブルとされ、全て００ｈとされる。 The first line is a preamble, which is all 00h.
　第１の同期バイトは第１行目のみに用いるため、これを検出することにより、ＢＣＡコードの開始位置を検出することが可能である。もしくは、第１の同期バイト以降の００ｈデータと併せて検出することも可能である。第２行目から第３３行目までは、４行単位で領域が区分される。第２行目から第５行目までには、ユーザデータＩ０,０からＩ０,１５の１６バイトのデータが配置される。続いて、第６行目から第９行目までには、第２行目から第５行目までのユーザデータＩ０,０からＩ０,１５に対応する１６バイトのパリティＣ０,０からＣ０,１５が配置される。この第２行目から第５行目までのユーザデータと第６行目から第９行目までのパリティによって、１つのＥＣＣブロックが構成される。 Since the first synchronization byte is used only for the first line, it is possible to detect the start position of the BCA code by detecting this. Alternatively, it is possible to detect together with 00h data after the first synchronization byte. In the second to thirty-third lines, the area is divided in units of four lines. In the second to fifth lines, 16-byte data of user data I0,0 to I0,15 are arranged. Subsequently, in the sixth to ninth lines, 16-byte parity C0,0 to C0,15 corresponding to user data I0,0 to I0,15 in the second to fifth lines. Is placed. One ECC block is configured by the user data of the second to fifth lines and the parity of the sixth to ninth lines.
　同様に、第１０行目から第１３行目までにユーザデータＩ１,０からＩ１,１５が配置され、第１４行目から第１７行目に対応するパリティＣ１,０からＣ１,１５が配置される。第１８行目から第２１行目までにユーザデータＩ２,０からＩ２,１５が配置され、第２２行目から第２５行目に対応するパリティＣ２,０からＣ２,１５が配置される。第２６行目から第２９行目までにユーザデータＩ３,０からＩ３,１５が配置され、第３０行目から第３３行目に対応するパリティＣ３,０からＣ３,１５が配置される。 Similarly, user data I1,0 to I1,15 are arranged in the tenth to thirteenth rows, and parities C1,0 to C1,15 corresponding to the fourteenth to seventeenth rows are arranged. Ru. User data I2, 0 to I2, 15 are arranged on the 18th to 21st lines, and parity C2, 0 to C2, 15 corresponding to the 22nd to 25th lines are arranged. User data I3, 0 to I3, 15 are arranged on the 26th to 29th lines, and parity C3, 0 to C3, 15 corresponding to the 30th to 33rd lines are arranged.
　第２行目から第５行目の同期バイトはＳＢ００とされる。第６行目から第９行目までの同期バイトはＳＢ０１とされる。第１０行目から第１３行目までの同期バイトはＳＢ０２とされる。第１４行目から第１７行目までの同期バイトはＳＢ０３とされる。第１８行目から第２１行目までの同期バイトはＳＢ１０とされる。第２２行目から第２５行目までの同期バイトはＳＢ１１とされる。第２６行目から第２９行目までの同期バイトはＳＢ１２とされる。第３０行目から第３３行目までの同期バイトはＳＢ１３とされる。第３４行目にはデータは配置されず、同期バイトのＳＢ３２のみが配置される。図２７のデータは図２５の変調方式に従い、変調される前のデータを示している。そのデータ量は１６６バイトとなる。（＝５バイト×４行×８セット＋５バイト＋１バイト）この情報が変調された結果、４６４８チャネルビットとなる。（＝１６６×８×７／２）
　図２７の同期信号の具体的なデータ列を図２８に示す。なお、図２８の例は変調後のチャネルビット列として表される。２８チャネルビットの同期バイトは１４チャネルビットのシンクボディと、１４チャネルビットのシンクＩＤとで構成される。１４チャネルビットのシンクボディは７チャネルビットのシンクボディ１と、７チャネルビットのシンクボディ２とで構成される。１４チャネルビットのシンクＩＤは、７チャネルビットのシンクＩＤ１と、７チャネルビットのシンクＩＤ２とで構成される。 The synchronization bytes in the second to fifth lines are SB00. The synchronization byte from the sixth line to the ninth line is SB01. The synchronization byte from the 10th line to the 13th line is SB02. The synchronization byte from the 14th line to the 17th line is SB03. The synchronization byte from the 18th line to the 21st line is SB10. The synchronization byte from the 22nd line to the 25th line is SB11. The synchronization byte from the 26th line to the 29th line is SB12. The synchronization byte from the 30th line to the 33rd line is SB13. No data is placed on the 34th line, and only SB 32 of the synchronization byte is placed. Data in FIG. 27 shows data before being modulated according to the modulation scheme in FIG. The amount of data is 166 bytes. (= 5 bytes × 4 rows × 8 sets + 5 bytes + 1 byte) As a result of this information being modulated, there are 4648 channel bits. (= 166 x 8 x 7/2)
A specific data string of the synchronization signal of FIG. 27 is shown in FIG. The example of FIG. 28 is represented as a channel bit string after modulation. The synchronization byte of 28 channel bits comprises a sync body of 14 channel bits and a sync ID of 14 channel bits. The sync body of 14 channel bits is composed of a sync body 1 of 7 channel bits and a sync body 2 of 7 channel bits. The sync ID of 14 channel bits is formed of a sync ID 1 of 7 channel bits and a sync ID 2 of 7 channel bits.
　なお、シンクボディは先に記した本来の変調則に従わないパターンとなっている。すなわち、図２５に記されるように本変調則に従えば、その同期部は“０１０”とされるはずである。しかし、シンクボディ２の同期部は“０１０”とは異なる“００１”とされている。従って、同期バイトをデータから識別することが可能である。 The sink body has a pattern that does not follow the original modulation rule described above. That is, as shown in FIG. 25, according to the present modulation rule, the synchronization part should be "010". However, the synchronization portion of the sync body 2 is "001" different from "010". Thus, it is possible to identify synchronization bytes from the data.
　各同期バイトのシンクボディ１はいずれも“０１０　０００１”とされ、シンクボディ２は“００１　０１００”とされる。これに対し、シンクＩＤは、同期バイト毎に異なる値とされ、これにより同期バイトを識別することが可能となっている。このように、各同期バイトが異なるため、識別が可能となる。 The sync body 1 of each synchronization byte is set to "010 0001", and the sync body 2 is set to "001 0100". On the other hand, the sync ID is a different value for each synchronization byte, which makes it possible to identify the synchronization byte. In this way, each synchronization byte is different, so that identification is possible.
　ＢＣＡコードのＥＣＣブロックの構成を図２９に示す。ＥＣＣはＲＳ（２４８，２１６，３３）のリードソロモン符号が用いられる。これは、図１４のＥＣＣブロックと同様のリードソロモン符号である。ただし、ＢＣＡコードのＥＣＣブロックは図２９のように、先頭の２００バイトは固定データとされ、例えばＦＦｈが使用される。この固定データに続く１６バイトのデータが実質的なＢＣＡのユーザデータとされる。２００バイトの固定データと、１６バイトのＢＣＡデータとを用いて、３６バイトのパリティが計算する。 The configuration of the ECC block of the BCA code is shown in FIG. As the ECC, Reed Solomon code of RS (248, 216, 33) is used. This is a Reed Solomon code similar to the ECC block of FIG. However, in the ECC block of the BCA code, as shown in FIG. 29, the first 200 bytes are fixed data, and, for example, FFh is used. The 16-byte data following the fixed data is substantially used as BCA user data. Using 200 bytes of fixed data and 16 bytes of BCA data, 36 bytes of parity are calculated.
　なお、本実施形態における２１６バイトのデータのうち、先頭２００バイトは固定データであり、光ディスクには記録されない。同様に、３２バイトのパリティのうち、先頭１６バイトのパリティＣ０からＣ１５のみが光ディスク１に記録され、残りの１６バイトのパリティは記録されない。復号時には、２００バイトの固定データは、同一の値がそのまま用いられる。また、記録されない１６バイトのパリティは消失フラグとして復号される。つまり、３２バイトのパリティのうち、後半の１６バイトは位置するパリティが、消失したものとして処理される。パリティの１／２が消失したとしても、その位置が既知であるため、元のパリティを復号することが可能である。 In the 216-byte data in the present embodiment, the first 200 bytes are fixed data and are not recorded on the optical disc. Similarly, among the 32 bytes of parity, only the first 16 bytes of parity C0 to C15 are recorded on the optical disc 1, and the remaining 16 bytes of parity are not recorded. At the time of decoding, the same value is used as fixed data of 200 bytes. Also, 16-byte parity not recorded is decoded as an erasure flag. That is, of the 32-byte parity, the latter 16 bytes are processed as if the located parity was lost. Even if one half of the parity is lost, the original parity can be decoded because its position is known.
　このように、ユーザデータエリアに記録されるユーザデータのＥＣＣと同じＲＳ（２４８，２１６，３３）を用いることで、ＢＣＡにおいても非常に強力なエラー訂正能力を実現可能となる。また、同一のハードウェアでの構成が可能となるので、回路規模を低減でき、コスト低減することができる。更に、３２バイトのみを記録すればよく、２４８バイト全てを記録する場合に比べ、データ容量を大きくすることができる。 As described above, by using the same RS (248, 216, 33) as the ECC of the user data recorded in the user data area, a very strong error correction capability can be realized also in the BCA. Further, since the configuration with the same hardware is possible, the circuit scale can be reduced and the cost can be reduced. Furthermore, only 32 bytes need to be recorded, and the data capacity can be increased as compared to the case where all 248 bytes are recorded.
　次に、ＢＣＡのデータブロックの構成を図３０に示す。本実施形態において、４個のＥＣＣブロックがバーストカッティングエリア２４０２に記録される。各ＥＣＣブロックの１６バイトのデータは、先頭の１バイトのコンテンツコードと、続く１５バイトのコンテンツデータで構成される。ＢＣＡのコンテンツコードは、先頭のビット７からビット２までの６ビットがアプリケーションＩＤとされ、最後のビット１、ビット０の２ビットがシーケンス番号とされる。 Next, FIG. 30 shows the configuration of the data block of BCA. In the present embodiment, four ECC blocks are recorded in the burst cutting area 2402. The 16-byte data of each ECC block is composed of the leading 1-byte content code and the subsequent 15-byte content data. In the content code of BCA, six bits from the first bit 7 to bit 2 are set as an application ID, and two bits of the last bit 1 and bit 0 are set as a sequence number.
　光ディスク記録再生装置は、取り決められたアプリケーションＩＤを有する光ディスクに対してのみ、データの記録する、もしくは再生することが可能とされる。例えば、特定のアプリケーションＩＤを有するディスクに対して、コンテンツデータを保護するために必要な、コンテンツの暗号化／復号化の鍵情報等を記録することができる。 The optical disk recording and reproducing apparatus can record or reproduce data only on an optical disk having an agreed application ID. For example, it is possible to record content encryption / decryption key information and the like necessary for protecting content data on a disc having a specific application ID.
　シーケンス番号は２ビットで構成され、“００”、“０１”、“１０”、“１１”のいずれかとされる。各ＥＣＣブロックのコンテンツデータが１４バイト以下である場合にはそれぞれのシーケンス番号は“００”とされる。 The sequence number is composed of 2 bits and is any one of "00", "01", "10" and "11". When the content data of each ECC block is 14 bytes or less, each sequence number is set to "00".
　次にコンテンツデータの格納方法を示す。例えば、４つのＥＣＣブロックのうち、先頭の２個のＥＣＣブロックの各コンテンツデータとして、同一のコンテンツデータを格納した場合（この場合は、同一アプリケーションＩＤの同一コンテンツデータの２重書きである）、それぞれのＥＣＣブロックのシーケンス番号は“００”とされる。すなわち、同一のコンテンツデータを記録する場合には、２つのＥＣＣブロックのシーケンス番号は同一番号とされる。 Next, a method of storing content data is shown. For example, when the same content data is stored as the content data of the first two ECC blocks among the four ECC blocks (in this case, double writing of the same content data of the same application ID), The sequence number of each ECC block is "00". That is, when the same content data is recorded, the sequence numbers of the two ECC blocks are the same.
　続いて、残りの２個のＥＣＣブロックに、最初のＥＣＣブロックのアプリケーションＩＤとは異なるコンテンツデータを２４バイト格納する場合、１番目のシーケンス番号は“００”とされ、２番目のＥＣＣブロックのシーケンス番号は“０１”とされる。すなわち、複数のＥＣＣブロックにまたがる場合には、通し番号が格納される。 Subsequently, when storing 24 bytes of content data different from the application ID of the first ECC block in the remaining two ECC blocks, the first sequence number is “00”, and the sequence of the second ECC block is stored. The number is "01". That is, when straddling a plurality of ECC blocks, serial numbers are stored.
　このように、各ＥＣＣブロックに、アプリケーションＩＤとシーケンス番号が記録されるので、それらから判断して、いずれのＥＣＣブロックに所望のデータが格納されているのか、また多重書きであるかという識別が可能である。 As described above, since the application ID and the sequence number are recorded in each ECC block, it is determined from them whether the desired data is stored in which ECC block or the multiple writing is performed. It is possible.
　なお、図３０のデータブロックのＢＣＡコンテンツコード、及びコンテンツデータが、図２７の先頭ＥＣＣブロックのＩ０,０からＩ０,１５に対応する。 The BCA content code and content data of the data block in FIG. 30 correspond to I0,0 to I0,15 in the first ECC block in FIG.
　　[ディスクの記録再生装置]
  本実施形態に好適として形状、データのエンコード処理、ＢＣＡについて説明した光ディスクの再生を行う記録再生装置の説明を図３１を用いて行う。図３１は記録再生装置のブロック図である。図３１において、３１００は図８，９，１０に示される再生専用ディスクもしくは、概ね共通の形状をとる記録可能ディスクである。３１０１はディスク３１００を回転させるディスクモータ、３１０２はディスク３１００にレーザー光を照射し、反射光を検出し再生信号を得る光ピックアップである。また３１０２は記録時には的確に整形された波形のレーザー光をディスク３１００に照射して記録を行う。３１０３はアナログフロントエンドであり、光ピックアップ３１０２で検出された信号の波形整形やサーボ信号の生成などを行う。３１０４は復調処理回路であり、波形整形された信号の２値化や、データのエンコード処理で説明した１－７変調に基づいた復調処理などを行う。３１０５はＤＲＡＭ（Ｄｙｎａｍｉｃ　Ｒａｎｄｕｍ　Ａｃｃｅｓｓ　Ｍｅｍｏｒｙ）であり、復調処理されたデータ、訂正処理中、入出力データ、変調処理前のデータなどの一時記憶に用いられる。３１０６はＥＣＣ（Ｅｒｒｏｒ　Ｃｏｒｒｅｃｔｉｏｎ　Ｃｉｒｃｕｉｔ）であり、再生処理時にはＤＲＡＭ３１０５に一時記憶された復調処理済のデータに対し、誤り訂正処理をおこない、記録処理時には、ＤＲＡＭ３１０５に一時記憶された入力データに対し、誤り訂正符号の付加を行う。３１０７はインターフェース回路であり、ＤＲＡＭ１０５に一時記憶されたデータを出力端子３１１４から出力したり、入力端子３１１３からの入力データをＤＲＡＭ３１０５に記憶させたり、ＤＲＡＭ３１０５に記憶されたＢＣＡ関連情報の出力端子３１１５からの出力などインターフェース処理を行う。３１１３と３１１５共通化することもできる。また、双方向化することで３１１３，３１１４，３１１５を共通化することも可能である。３１０８は変調回路であり、記録時には、ＤＲＡＭ３１０５から読み出したデータに対して、データのエンコード処理で説明した１－７変調に基づいた変調処理を行い、変調データをＬＤＤ（Ｌａｓｅｒ　Ｄｉｏｄｅ　Ｄｒｉｖｅｒ）３１０９に供給する。ＬＤＤ３１０９は記録時には、変調データに対して、記録に適切な記録波形を光ピックアップ３１０２に供給し、ピックアップ３１０２は記録波形に従って発光して記録を行う。３１１０はＢＣＡデコーダーであり、ＢＣＡの再生時には、[ＢＣＡ]で説明されたように低反射率の有無によって記録された、ＢＣＡのデータブロックのデコード処理を行う。 [Disk recording and playback device]
The recording and reproducing apparatus for reproducing the optical disc described in the shape, data encoding process, and BCA as suitable for the present embodiment will be described with reference to FIG. FIG. 31 is a block diagram of a recording and reproducing apparatus. In FIG. 31, 3100 is a read-only disc shown in FIGS. 8, 9, 10, or a recordable disc having a substantially common shape. Reference numeral 3101 denotes a disk motor for rotating the disk 3100. Reference numeral 3102 denotes an optical pickup for irradiating the disk 3100 with a laser beam and detecting reflected light to obtain a reproduction signal. Further, at 3102, recording is performed by irradiating the disk 3100 with laser light of a waveform shaped properly at the time of recording. An analog front end 3103 performs waveform shaping of a signal detected by the optical pickup 3102 and generation of a servo signal. A demodulation processing circuit 3104 performs binarization of the waveform-shaped signal, demodulation processing based on 1-7 modulation described in the data encoding processing, and the like. Reference numeral 3105 denotes a dynamic random access memory (DRAM), which is used for temporary storage of data subjected to demodulation processing, during correction processing, input / output data, data before modulation processing, and the like. An error correction circuit (ECC) 3106 performs error correction processing on the demodulated data temporarily stored in the DRAM 3105 during reproduction processing, and an error for input data temporarily stored in the DRAM 3105 during recording processing. Add a correction code. An interface circuit 3107 outputs data temporarily stored in the DRAM 105 from the output terminal 3114, stores input data from the input terminal 3113 in the DRAM 3105, and outputs an output terminal 3115 of BCA related information stored in the DRAM 3105. Perform interface processing such as output of. 3113 and 3115 can also be shared. Moreover, it is also possible to share 3311, 3114, and 3115 by making them bidirectional. A modulation circuit 3108 performs modulation processing based on 1-7 modulation described in the data encoding processing for data read from the DRAM 3105 at the time of recording, and supplies the modulation data to an LDD (Laser Diode Driver) 3109. Do. During recording, the LDD 3109 supplies a recording waveform suitable for recording to the optical pickup 3102 for modulation data, and the pickup 3102 emits light in accordance with the recording waveform to perform recording. A BCA decoder 3110 decodes BCA data blocks recorded according to the presence or absence of low reflectance as described in [BCA] at the time of BCA reproduction.
　なお、本発明は上記した実施形態に限定されるものではなく、様々な変形例が含まれる。例えば、上記した実施形態は本発明を分かりやすく説明するために詳細に説明したものであり、必ずしも説明した全ての構成を備えるものに限定されるものではない。また、ある実施例の構成の一部を他の実施例の構成に置き換えることが可能であり、また、ある実施例の構成に他の実施例の構成を加えることも可能である。また、各実施例の構成の一部について、他の構成の追加・削除・置換をすることが可能である。 The present invention is not limited to the above-described embodiment, but includes various modifications. For example, the above-described embodiment is described in detail to explain the present invention in an easy-to-understand manner, and is not necessarily limited to one having all the described configurations. Also, part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. In addition, with respect to a part of the configuration of each embodiment, it is possible to add, delete, and replace other configurations.
　また、上記の各構成は、それらの一部又は全部が、ハードウェアで構成されても、プロセッサでプログラムが実行されることにより実現されるように構成されてもよい。また、制御線や情報線は説明上必要と考えられるものを示しており、製品上必ずしも全ての制御線や情報線を示しているとは限らない。実際には殆ど全ての構成が相互に接続されていると考えてもよい。 In addition, each of the configurations described above may be configured such that part or all of them are configured by hardware or implemented by executing a program by a processor. Further, control lines and information lines indicate what is considered to be necessary for the description, and not all control lines and information lines in the product are necessarily shown. In practice, almost all configurations may be considered to be mutually connected.
　３１００…ディスク、３１０１…ディスクモータ、３１０２…光ピックアップ 3100 ... disc, 3101 ... disc motor, 3102 ... optical pickup

Claims (4)

  1. 　光ディスクのＢＣＡ（Ｂｕｒｓｔ　Ｃｕｔｔｉｎｇ　Ａｒｅａ）であり、検出される信号の上側のレベルとなる領域はデータ変調のないミラーレベルであり、下側のレベルとなる領域に、記録再生を行う光波長の略１／４の深さのピット構造で構成することを特徴とする光情報媒体。 The BCA (Burst Cutting Area) of the optical disc, the area at the upper level of the detected signal is the mirror level without data modulation, and the area at the lower level is approximately 1 of the light wavelength for recording and reproduction. An optical information medium characterized by comprising a pit structure with a depth of 4/4.
  2. 　請求項１に記載のＢＣＡのピット構造とは、データ長に制限されない溝構造であることを特徴とする光情報媒体。 An optical information medium characterized in that the pit structure of BCA according to claim 1 is a groove structure not limited to the data length.
  3. 　請求項１に記載のＢＣＡのピット構造とは、当該情報記録媒体の最長ピット長と、最短ランド長を組み合わせていることを特徴とする光情報媒体。 An optical information medium characterized in that the pit structure of the BCA according to claim 1 is a combination of the longest pit length of the information recording medium and the shortest land length.
  4. 　請求項１に記載のＢＣＡのピット構造であり、ピット幅が記録再生を行うスポットサイズの略半分であることを特徴とする光情報記録再生装置。 An optical information recording and reproducing apparatus according to claim 1, wherein the pit width of the BCA pit structure is approximately half the spot size for recording and reproduction.
PCT/JP2011/054383 2010-09-27 2011-02-25 Optical information medium, optical information recording and playback device and optical information recording and playback method WO2012042922A1 (en)

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JPH06208723A (en) * 1992-11-20 1994-07-26 Sony Corp Optical disk and its manufacture
JPH1145461A (en) * 1997-07-23 1999-02-16 Victor Co Of Japan Ltd Disk, its discriminating method and device and its reproducing device
JP2003030856A (en) * 2001-07-17 2003-01-31 Pioneer Electronic Corp Optical disk and recording/reproducing device
JP2003123322A (en) * 2001-08-09 2003-04-25 Sharp Corp Optical recording medium, device and method for discriminating the same
JP2006517326A (en) * 2003-02-03 2006-07-20 サムスン エレクトロニクス カンパニー リミテッド Optical information recording medium
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