JP4130692B2 - Information recording medium, information recording apparatus, information recording method, information reproducing apparatus, and information reproducing method - Google Patents

Description

  The present invention relates to an information recording medium on which sector data generated from an ECC (Error Correction Code) block structure is recorded.

  The present invention also relates to an information recording apparatus and information recording method for recording sector data generated from an ECC block structure.

  Furthermore, the present invention relates to an information reproducing apparatus and information reproducing method for reproducing an information recording medium on which sector data generated from an ECC block structure is recorded.

  In recent years, the current DVD standards (physical standards and logical standards) have been completed. This standard shows an ECC block structure to which a parity code for error correction is added as a data structure recorded on an optical disk (information recording medium). In the current DVD, data having a common ECC block structure is recorded on both a read-only optical disk and a rewritable optical disk. In addition, an application standard indicating a recording format in an application layer when recording AV (Audio Video) information or stream information on a current DVD disc has been completed.

  In the physical standard, the minimum unit of user information recorded on an optical disc is 2048 bytes, and this recording unit is called a physical sector. The data in the physical sector includes a data ID in which a sector number and the like are recorded, an IED (Data ID Error Detection code) of an error detection code for the data ID, user information, and an EDC (Error as an error detection code for data in the physical sector). Detection Code). In addition, an “Reed-Solomon product code” method is employed as an error correction method for improving the reliability of data recorded on an optical disc, and ECC with PI (inner-code parity) data and PO (outer-code parity) data added thereto. A block structure is formed. One ECC block is composed of data for 16 sectors. A technique relating to the ECC block structure is disclosed in Japanese Patent Laid-Open No. 10-172243.

  In the present specification, the data content or data structure including the data ID and parity data is referred to as “data”, and the recorded user information (= Main data) is referred to as “information”. Data contents or information contents directly recorded in a physical sector in the optical disc are called “physical sector data” and “physical sector information”. The size of one physical sector information is 2048 bytes.

  The logical standard defines a data structure related to user information recorded on an optical disc when viewed from the host computer connected to the interface unit of the information reproducing apparatus or information recording apparatus. The minimum unit of information exchanged between the host computer and the information reproducing apparatus or information recording apparatus is defined as a logical sector. In this specification, the contents of user information corresponding to the logical sector are referred to as logical sector information. The size of the logical sector information is 2048 bytes in accordance with the physical sector information size.

  The contents of the logical sector information and the contents of the physical sector information are basically the same. However, since the physical layer defined by the physical standard and the logical layer defined by the logical standard are different, the contents of the physical sector information and the logical sector information contents may be different from each other. That is, information is exchanged between the host computer and the information reproducing apparatus or information recording apparatus using 2048-byte logical sector information as a minimum unit, and information obtained by processing the logical sector information is used as physical sector information on the optical disc. May be recorded.

  The minimum unit of video object (Video Object) information and audio object (Audio Object) information transferred between the host computer and the information reproducing apparatus or information recording apparatus is 2048 bytes in accordance with the logical sector size. According to the application standard, video object information and audio object information are divided in units of 2048 bytes, multiplexed in the form of a pack structure as a minimum unit, and recorded on the optical disc. In other words, the audio video information recorded on the recording medium is time-divided and distributed in a state where a video pack (Video Pack) containing video object information and an audio pack (Audio Pack) containing audio object information are mixed. Has been. In this case, video pack information or audio pack information itself corresponds to the logical sector information content.

  The minimum recording unit of stream information is called SOBU (Stream Object Unit), and one SOBU size is defined as 32 logical sectors or 2 ECC blocks.

  With the current DVD, error correction is possible up to a burst error length of up to 6 mm on the optical disk. In the next generation DVD, the data recording density is improved, so that the data bit length on the optical disk (recording medium) is shortened. It is assumed that the data bit length is proportional to the optical wavelength used in the optical head of the reproducing apparatus or recording / reproducing apparatus and inversely proportional to NA (Numerical Apperture). In this case, when the optical wavelength of the next-generation DVD is 405 nm and NA = 0.85, while the optical wavelength of the current DVD is 650 nm and NA = 0.65, the error correction on the optical disc (recording medium) is performed in the next-generation DVD. The possible burst error length is greatly reduced to 2.9 mm according to the following formula.

6 × (405 ÷ 650) × (0.65 ÷ 0.85) = 2.9
Therefore, in the next generation DVD, a technical device is required to secure a burst error length of 6 mm or more that can be error-corrected in the same manner as the current DVD.

  When the burst error length that can be corrected for the next generation DVD is to be greatly improved as described above in the state of following the Reed-Solomon product code technology as the ECC block structure, the following (1) to (3) As a result, the burst error length that can be corrected cannot be significantly improved only by changing the size of the Reed-Solomon product code of the current DVD.

  (1) The maximum size of a Reed-Solomon product code that performs error correction in 1-byte units has a limit of 256 rows × 256 columns. The current DVD has 208 rows × 182 columns. The current DVD has the most optimized structure within the limit range of 256 rows × 256 columns, and it is difficult to significantly improve the burst error length that can be corrected by simple dimensional changes.

  (2) The main data information encoding efficiency cannot be significantly reduced as compared with the current DVD. Although it is possible to improve the burst error length that can be corrected by increasing the PO size in the ECC block, the redundancy depending on the PO size increases and the main data information encoding efficiency is greatly reduced. . In the current DVD, the main data information encoding efficiency including the redundant data such as the data ID in the physical sector is 87%. Therefore, it is necessary to ensure encoding efficiency close to 87% even in the next-generation DVD.

  (3) It is necessary to guarantee the appropriateness of the physical sector data structure. As a method of greatly improving the correctable burst error length and ensuring high main data information encoding efficiency, a method of greatly expanding the PO size and correspondingly reducing the PI size can be easily considered. However, in order to ensure high-speed data access on the optical disk, it is necessary to arrange the data ID first in the physical sector data. For this purpose, interleaving arrangement of PO data in each physical sector is necessary. . In order to make this possible, it becomes difficult to change the PO size to an arbitrary value.

  An object of the present invention is to provide the following information recording medium, information recording apparatus, information recording method, information reproducing apparatus, and information reproducing method.

  (1) An information recording medium capable of recording sector data generated from an ECC block structure with greatly improved burst error length correction capability.

  (2) An information recording apparatus and an information recording method capable of recording sector data generated from an ECC block structure with greatly improved burst error length correction capability.

  (3) An information reproducing apparatus and information reproducing method capable of reproducing an information recording medium on which sector data generated from an ECC block structure with greatly improved burst error length correction capability is recorded.

  In order to solve the above problems and achieve the object, an information recording medium, information recording apparatus, information recording method, information reproducing apparatus, and information reproducing method of the present invention are configured as follows.

  (1) The information recording medium of the present invention includes a plurality of physical sector areas for recording physical sector data generated by a combination of some data included in a plurality of ECC blocks.

  (2) An information recording apparatus of the present invention is an information recording apparatus for recording information on an information recording medium, and generates physical sector data by combining a part of data included in a plurality of ECC blocks. Recording means for recording physical sector data in a physical sector area on the information recording medium is provided.

  (3) An information recording method of the present invention is an information recording method for recording information on an information recording medium, wherein physical sector data is generated by a combination of some data included in a plurality of ECC blocks. Physical sector data is recorded in a physical sector area on the information recording medium.

  (4) An information reproducing apparatus according to the present invention reproduces an information recording medium having a plurality of physical sector areas in which physical sector data generated by a combination of some data included in a plurality of ECC blocks is recorded. An apparatus comprising: reproducing means for reading physical sector data from a predetermined number of physical sector areas on the information recording medium, generating a plurality of ECC blocks from the read physical sector data, and reproducing the read physical sector data ing.

  (5) The information reproduction method of the present invention reproduces an information recording medium having a plurality of physical sector areas in which physical sector data generated by a combination of some data included in a plurality of ECC blocks is recorded. The method reads physical sector data from a predetermined number of physical sector areas on the information recording medium, generates a plurality of ECC blocks from the read physical sector data, and reproduces the read physical sector data.

  Hereinafter, the configuration and effects of the information recording medium, information recording apparatus, information recording method, information reproducing apparatus, and information reproducing method of the present invention will be specifically described.

  <1> First, the first to fifth data units are defined as follows.

  A minimum unit recorded on a medium capable of reproducing or recording information is defined as a first data unit (physical sector). A second data unit (a group of n ECC blocks) including the first data unit is defined. A third data unit (ECC block data) included in the second data unit and constituting an ECC block constituting the Reed-Solomon product code is defined. The second data unit includes n third data units that are two or more positive numbers that are independent of each other and have the same data size. A fourth data unit that defines one row, which is a data array to which PI (inner-code parity) data is added, is included in the third data unit. A fifth data unit (PO for one row) that defines PO (outer-code parity) data in the third data unit and is divided into a fourth data unit size (row size) is defined.

  The first data unit is composed of an aggregate of the fourth data unit and the fifth data unit, the fourth data unit number (number of rows including PI) included in the first data unit, and the above The total value of the fifth data unit number (PO row number) is an integer multiple of n, and the data of the fourth data unit is always arranged at a specific position in the first data unit, and A data structure in which a data ID including address information is always arranged at a specific position is generated.

  The information recording medium of the present invention includes a physical sector area in which data having the above data structure is recorded. The information recording apparatus and the information recording method of the present invention generate data having such a data structure and record the data having such a data structure on an information recording medium. Furthermore, the information reproducing apparatus and information reproducing method of the present invention reproduces an information recording medium on which data having such a data structure is recorded.

  The relationship between the above data units is as follows.

Second data unit ⊃ First data unit ⊃ Fourth data unit (n × ECC block) (Physical sector) (Line including PI)
Second data unit ⊃ Third data unit ⊃ Fourth data unit (n × ECC block) (ECC block) (Line including PI)
Second data unit ⊃ Third data unit ⊃ Fifth data unit (n × ECC block) (ECC block) (Row including PO)
The points of the above-described invention are as follows.

  1) Data in one physical sector is divided for each row and assigned to different ECC blocks.

  2) The data ID is arranged first in the physical sector, and one line of PO is arranged in a line other than the first.

  3) The sum of the number of rows including PI and the number of PO rows included in the physical sector is an integral multiple of the number of corresponding ECC blocks.

  The effects of the above-described invention are as follows.

  1) Since the physical sector information size is 2048 which is the same as that of the current DVD, it is possible to ensure complete compatibility between the standard contents of the current DVD's logical layer and the application layer. Data can be used effectively.

  2) The n number of third data units are included in the second data unit, and the physical sector data (first data unit) is a separate ECC block (third data unit) for each row (fourth data unit). The burst error length capable of error correction can be improved by approximately n times simply by interleaving within the data unit. Therefore, according to the present invention, it is possible to greatly improve the burst error length that can be corrected relatively easily without significantly reducing the main data information encoding efficiency as compared with the current DVD standard.

  3) The effect that the inner code (PI) is the horizontal direction and the outer code (PO) is the vertical direction and is a complete product code is as follows.

  -Since the inner code correction for the outer code parity and the outer code correction for the inner code parity are possible, it is possible to improve the correction capability by repeatedly performing the correction with the inner code and the outer code for all recorded data.

  By combining with recording interleaving, it is possible to achieve both the dispersion of consecutive errors with respect to the inner code and the completeness of the product code that can be repeatedly corrected.

  ・ In order to bring out the effect of the present invention, “inner code (PI) is horizontal and outer code (PO) is vertical full product code”, as a comparison, “inner code is inclined in order to disperse consecutive errors” In this case, the integrity of the product code is lost, and the correction capability cannot be increased by performing repeated correction using the inner code and the outer code.

  4) Except for interleaving between a plurality of ECC blocks, the data correspondence in ECC blocks and physical sector data is consistent with the current DVD standard as follows.

  Correspondence between physical sector data and data in ECC block in units of rows including PI.

  -Interleaved placement in each physical sector of PO in ECC block.

As a result, a part of the ECC block creation processing (PI and PO generation, etc.) and error correction processing in the playback apparatus or recording / playback apparatus having a compatibility function between the current generation DVD and the next generation DVD and the current correction DVD ( The medium) can be used at the same time as in use, and it becomes possible to simplify the processing routine and circuit of the reproducing apparatus or recording / reproducing apparatus having a compatibility function between the current generation DVD and the next generation DVD.

  5) Similar to the current DVD standard, the data ID is arranged at the beginning of the physical sector data, so that the playback control unit having the compatibility function between the current generation DVD and the next generation DVD or the access control portion and the sector address detection in the recording / playback device The confirmation processing part can be shared, and the control within the apparatus can be simplified.

  6) The total value of the number of rows including the PI (fourth data unit number) and the number of PO rows (the fifth data unit number) included in the physical sector (first data unit) is an integer multiple of n. As a result, all data included in one physical sector can be evenly distributed (interleaved) in all corresponding ECC blocks. Since there is no bias in the arrangement in the ECC block, not only the interleave processing to each ECC block becomes easy, but also there is no bias error length bias that can correct the error depending on the location on the optical disk, so reproduction when a burst error occurs There is no adverse effect on information. That is, since the interleaving is performed so that the data of n product codes are always alternately recorded for each row, uniform burst error correction capability can be obtained. Therefore, there is no portion where the burst error correction capability is partially weak. Even if interleaving is performed alternately, the lengths of all sectors can be made equal.

  7) The same number of POs are always arranged in one physical sector so that the physical sector size is the same in all physical sectors, and the following advantages can be obtained.

  In the prior art, in order to distribute the outer code parity in units of one row while interleaving a plurality of product codes, it is necessary to insert an outer code parity row for each of a plurality of sectors. For this reason, it is necessary to record a plurality of sectors as a set, or to create two types of sectors with parity and no parity.

  According to the present invention, rewriting can be performed in units of one sector. In particular, since it is possible to perform defective sector replacement processing on a sector-by-sector basis, the capacity of a spare sector required for replacement processing can be reduced. In addition, since the area that cannot be used simultaneously due to defects can be reduced, the use efficiency of the disk is increased. In addition, since sector identification data (ID) assigned to each sector can be recorded at equal intervals in the recording data, it is possible to easily detect and reproduce the ID.

  In the above-described invention, for example, n = 2 is set. In accordance with the SOBU size, “2ECC block = 32 physical sectors” is used as a basic unit, and all data in 32 physical sectors are all allocated in 2ECC blocks in the basic unit, thereby ensuring complete compatibility with the stream standard. It is possible to simplify the recording / reproducing process of the data recording apparatus compliant with the stream standard.

  <2> Further, the sixth data unit is defined as follows.

  A sixth data unit (for example, byte unit) obtained by further dividing the fourth data unit (row) is defined. Since “fifth data unit = PO for one line” was defined earlier, in order to avoid confusion, “sixth data unit = recording interleave unit across lines” was defined.

  The information recording medium of the present invention includes a physical sector area in which a sixth data unit sequentially selected from different fourth data units is recorded. In the information recording apparatus and information recording method of the present invention, the sixth data unit is sequentially selected from the different fourth data units and recorded in the physical sector area of the information recording medium. The information reproducing apparatus and information reproducing method according to the present invention reproduces a physical sector area in which sixth data units sequentially selected from different fourth data units are recorded.

  The relationship between the above data units is as follows.

4th data unit ⊃ 6th data unit (line including PI) (byte unit)
The points of the above-described invention are as follows.

  Errors can be distributed by recording interleaving (zigzag recording) between rows in the same physical sector.

  The effects of the above-described invention are as follows.

  Conventionally, recording is performed in the same direction as the inner code. If there is an error correlation between consecutive data, a plurality of consecutive bytes are likely to become errors at the same time, so the probability that the inner code cannot be corrected increases. As a result, there is a problem that the error correction capability is significantly lower than the case where a random error is assumed. In addition, if the recording is performed obliquely over the entire product code in order to distribute the error, there is a problem that the risk of errors occurring in a plurality of sectors simultaneously increases.

  The error characteristics of the reproduction data have an error correlation with continuously recorded data due to the influence of dust and the like. If there is an error correlation, consecutive errors are more likely to occur than when errors are assumed to occur randomly. Therefore, the recording direction is zigzag with respect to the direction of the inner code in order to disperse consecutively generated errors to different inner codes. As a result, the number of inner codes that can be corrected increases, so that the error correction capability is improved. Further, since the range in which the recording direction is zigzag is limited to the sector range, continuous errors do not spread over a plurality of sectors. Therefore, it is possible to avoid a risk that a plurality of sectors simultaneously cause errors due to a large error.

  <3> Further, physical sector information and logical sector information are defined as follows.

  User information recorded in the physical sector constituting the first data unit is defined as physical sector information. The minimum unit of user information transferred in the data recording apparatus or the data reproducing apparatus, or the minimum unit of user information transferred in the data recording apparatus or between the data reproducing apparatus and the external device is defined as logical sector information.

  The information recording medium of the present invention includes a physical sector area in which data generated so that the contents of physical sector information and logical sector information coincide is recorded. The information recording apparatus of the present invention generates and records data so that the contents of the physical sector information and the contents of the logical sector information match. Also, the information reproducing apparatus and information reproducing method of the present invention reproduces a physical sector area in which data generated so that the contents of physical sector information and logical sector information coincide is recorded. Thereby, physical sector information and logical sector information can be matched.

  The effects of the above-described invention are as follows.

  1) Data access in units of logical sectors becomes possible. When the error rate of the reproduction signal from the optical disk is low and error correction of each line in the physical sector is possible only by PI information, error-free (accurate) physical sector information can be read without using PO information. . Therefore, when the ECC block is configured so that the logical sector information and the physical sector information coincide with each other as in the present invention, only one physical sector data is reproduced from the optical disk when the error rate of the reproduction signal from the optical disk is low. Thus, one logical sector information can be read without using PO information, and data access becomes very easy.

  In the present invention, a data ID including sector address information is arranged at the head position in each physical sector data. Generally, this data ID is used when accessing data recorded on an optical disc. According to the present invention, since the contents of the logical sector information and the physical sector information match, the logical sector information can be recorded in this data ID. Therefore, since the logical sector address information in the physical sector data can be directly accessed to access the logical sector position designated in the application layer or the logical layer, the data access time is greatly shortened.

  2) According to the present invention, data continuity is easily ensured. In the application standard, AV information and stream information are recorded continuously in the order of logical sector addresses. In the present invention, since the contents of the logical sector information and the physical sector information match, it is possible to record the logical sector information in this data ID. As a result, the information arrangement order of AV information and stream information recorded or reproduced in the logical sector address order matches the physical sector address order set in accordance with the physical sector arrangement order on the optical disc. As a result, unnecessary access processing (track jump processing) when continuously recording or reproducing AV information or stream information on the optical disc is greatly reduced, and continuous recording or reproduction of AV information or stream information is performed. Is easy to secure.

  3) According to the present invention, defect processing in units of sectors is facilitated.

  Considering the prior art, when a product code is generated by an integer number of sectors and a plurality of product codes are interleaved, data of a plurality of sectors are mixedly recorded. Therefore, when continuous burst errors occur due to defects, there is a risk that errors occur in a plurality of sectors at the same time. Usually, since the presence of errors is finally checked in units of sectors, many sectors tend to be defective at the same time. Also, since the logical addresses are recorded with a bias, the recording data search cannot be performed efficiently.

  According to the present invention, when an error that cannot be corrected occurs due to a defect, it is possible to prevent the error remaining after correction from spreading. As a result, the number of sectors containing errors can be kept small. Further, when searching for a specific sector while reproducing data, the target position can be easily found from the continuity of the sector number.

  <4> Furthermore, in the information recording medium of the present invention, the data generated so that the arrangement of at least a part of the data in at least one ECC block in the plurality of ECC blocks matches the content of the logical sector information. A physical sector area to be recorded is provided. Also, the information recording apparatus and information recording method of the present invention generates data so that the arrangement of at least a part of data in at least one ECC block in the plurality of ECC blocks matches the contents of the logical sector information. Record. Also, the information reproducing apparatus and information reproducing method of the present invention are data generated so that the arrangement of at least a part of data in at least one ECC block in the plurality of ECC blocks matches the content of the logical sector information. Is reproduced. As a result, the logical sector information matches the data arrangement in the ECC block.

  The effects of the above-described invention are as follows.

  The process until the ECC block formation for the logical sector information transferred in the data recording apparatus or between the data reproducing apparatus and the external device is the same as the process until the ECC block formation on the current DVD. Therefore, a part of ECC block creation processing (PI and PO generation, etc.) and error correction processing in a playback device or recording / playback device having a compatibility function between the current generation DVD and the next generation DVD is used when the current DVD disc is used. Thus, it is possible to simplify the processing routine and circuit of a playback apparatus or recording / playback apparatus having a compatibility function between the current generation DVD and the next generation DVD.

  According to the present invention, the following information recording medium, information recording apparatus, information recording method, information reproducing apparatus, and information reproducing method can be provided.

  (1) An information recording medium capable of recording sector data generated from an ECC block structure with greatly improved burst error length correction capability.

  (2) An information recording apparatus and an information recording method capable of recording sector data generated from an ECC block structure with greatly improved burst error length correction capability.

  (3) An information reproducing apparatus and information reproducing method capable of reproducing an information recording medium on which sector data generated from an ECC block structure with greatly improved burst error length correction capability is recorded.

  Embodiments of the present invention will be described below with reference to the drawings.

  The basic features of the present invention are as follows.

  1) The physical sector data (recording sector) to be recorded on the optical disk is finely divided, and the data after each division is sequentially arranged in n ECC blocks that are two or more positive values (interleaving is performed).

2) Even before and after the interleaving process, a data ID is always arranged at the head position of each physical sector data. As a result, even if access processing is performed in units of physical sectors, address information can be read out quickly, and access processing can be speeded up.

  In the present embodiment, an example when “n = 2” is shown, but the content of the present invention is not limited thereto, and can be applied to, for example, n = 3 or n = 4.

  In the present invention, the following two methods have been devised as methods for causing one physical sector data to belong to a plurality of ECC blocks.

  (Method 1) Physical sector information and logical sector information match. One physical sector data is divided into rows including PI, and data for each row is sequentially allocated to n (n ≧ 2) ECC blocks, and includes PI in one physical sector data. The total number of rows and PO rows is an integer multiple of n.

  (Method 2) All information in one logical sector is included in the same ECC block. The logical sector data included in the different ECC blocks is alternately exchanged for each row to perform interleaving processing in units of rows, and the resulting data arrangement is recorded on the optical disc as physical sector data.

  First, the outline of (Method 1) will be described with reference to FIGS. 1 and 2.

  Continuously transferred AV information or stream information is finely divided, converted into a pack structure with a pack header added thereto, and recorded in a plurality of physical sector areas 9a provided on an optical disc (information recording medium 9). That is, as shown in FIG. 1A, video information is continuously arranged on the time axis in the form of video packs 1-0 to 1-3, and audio information is in the form of audio packs 2-0 to 2-1, Transferred. The data size of each video pack 1-0 to 1-3 and audio pack 2-0 to 2-1 is 2048 bytes, which matches the logical sector information size. The video packs 1-0 to 1-3 and the audio packs 2-0 to 2-1 are abstracted as logical sector information 3-1 to 3-31 as shown in FIG. (In other words, examples of specific contents of the logical sector information 3-1 to 3-31 are the video packs 1-0 to 1-3 and the audio packs 2-0 to 2-1). In the above method (method 1), the physical sector information and the logical sector information match, so that information is handled as it is as physical sector information 4-0 to 4-31 as shown in FIG. As will be described in detail later, each physical sector information 4-0 to 4-31 has 4 bytes of PID information, 2 bytes of IED information, and 10 bytes of reserve area (the size of the current DVD is 6 bytes) at the head. After 4-byte EDC is arranged (data 0-0-0 to data 0-0-5), it is divided every 188 bytes (data 0-0-0 to data 0-0-5) 1), error correction PI (inner-code parity) data (PI0-0-0 to PI0-0-5) is added every 188 bytes, as shown in FIG. Arranged sequentially. In the odd-numbered physical sector data (physical sector data 5-0), PO (outer-code parity) data (PO0) for error correction is finally arranged to complete the physical sector data 6-0. In the present invention, PO data (PO1) is arranged in the second-to-last column in the even-numbered physical sector data (physical sector data 5-1), and data 1-1- is placed at the end of the even-numbered physical sector data. 5 and PI data (PI1-1-5) have a structure (details will be described later). The completed physical sector data 5-0 to 5-31 are stored on the optical disc (information recording medium 9) according to the arrangement order of the physical sector data 5-0 to 5-31 as shown in FIG. Are recorded in the physical sector area 9a. One physical sector data is recorded in one physical sector area 9a.

  As shown in FIGS. 2 (f) and (g), one physical sector data 5-0 is configured as a combination of data in two different ECC blocks 8-0 and 8-1 at the same time. That is, the data in the physical sector data 5-0 is finely divided every 200 bytes, and 188 bytes of data 0-0-0 and PI data 0-0-0 are arranged in the first row in the ECC block 8-0. The The following 188-byte data 0-1-0 and PI data 0-1-0 in the physical sector data 5-0 are arranged in the first row in the ECC block 8-1. Further, the following 188-byte data 0-0-1 and PI data 0-0-1 in the physical sector data 5-0 are arranged in the second row in the ECC block 8-0. Of the PO data in the ECC block 8-1, the first 200 bytes are inserted as PO0 in the sixth row in the ECC block 8-1. As a result, data from data 0-0-0 to PO0 constitutes physical sector data 5-0.

  The first data 1-0-0 and subsequent PI1-0-0 in the next physical sector data 5-1 are arranged in the seventh row in the ECC block 8-0 as shown in FIG. The Of the PO data in the ECC block 8-0, the first 200 bytes of data are arranged as PO1 in the 12th row in the ECC block 8-0. In this way, PO data (PO0, PO1) for each row (200 bytes) is arranged at equal intervals for every two physical sector data 5-0 to 5-31, and the ECC blocks 8 whose arrangement positions form a pair are arranged. The present invention is characterized in that it is shifted by one physical sector data between −0 and 8-1.

  Next, a detailed structure in the ECC blocks 8-0 and 8-1 shown in FIGS. 2F and 2G will be described with reference to FIG.

  FIG. 3 shows a combination state of two ECC blocks (for each 200-byte sequence) on the left and right. Each ECC block has a structure in which 12 bytes of PI are added for every 188 bytes and PO for 16 rows is added. Further, the 16 rows of POs are each broken down into rows, and every 12 rows are interleaved and inserted. This means PO inserted by interleaving the hatched portion for each row of 200 bytes in FIG.

  The user information size allocated per sector is 2048 bytes, which is the same as that of the current DVD, and information having the same contents as the logical sector information recognized by the application layer is set as individual physical sector information (Main Data). For this 2048 bytes of physical sector information, 4 bytes of data ID information, 2 bytes of IED information, 10 bytes of reserve area (current DVD size is 6 bytes) are placed at the beginning, and 4 bytes of EDC are placed at the end. Arranged to constitute all data of the physical sector.

  By interleaving one physical sector data across two ECC blocks, the burst error length capable of error correction is improved approximately twice the conventional one. That is, one physical sector data is divided into 188 bytes, and a 12-byte PI (the current PI size is 10 bytes, and the error correction capability for each row has been improved by increasing it to 12 bytes) is added. Each row is alternately arranged in different left and right ECC blocks. Data in one physical sector (data sector) is characterized in that it has odd rows of 11 rows as shown in FIG. By setting the data sector to an odd number of rows, when one PO row is inserted into each physical sector, the total number of rows becomes an even number of rows, which can be surely incorporated without causing a remainder in the two ECC blocks. It becomes possible.

  PID information is always arranged at the head position for each physical sector (upper left corner position in FIG. 3), and the PO insertion position is devised as shown in FIG. 3 so that PO can be interleaved and inserted efficiently. That is, the PO is arranged at the last row position of the sector in the even sector, whereas the PO is arranged at the second row position from the last in the odd sector. As a result, each PO can be arranged in the same ECC block and the data sizes of all physical sectors can be matched.

  Next, the outline of (Method 2) will be described with reference to FIGS.

  As shown in FIG. 4A, AV information and stream information are stored in pack formats 1-0 to 1-3, 2-0, and each pack 1-0 to 1-3, 2-0 information is stored in a logical sector. The point corresponding to the information 3-0 to 3-16 is the same as (Method 1). With respect to the logical sector information 3-0 to 3-16 obtained at this time, ECC blocks 7-0 and 7-1 are formed in exactly the same manner as the conventional DVD standard, and PI information (PI0-0-0 to PI0-0) is formed. 16-1-1) and PO information (PO0-0, PO1-0) are inserted ((c) of FIG. 4).

  From the state of FIG. 4B, addition of data ID information, IED information, reserve area, EDC information, PI information (PI0-0-0 to 16-1-1) and PO information (PO0-0, PO1-0). 4) up to (c) in FIG. 4 is exactly the same as that in the conventional DVD (the number of data bytes is exactly the same). Accordingly, the structures in the ECC blocks 7-0 and 7-1 shown in FIGS. 5 (f) and 5 (g) are completely consistent with the conventional DVD standard up to various data byte values. As a result, a part of the ECC block creation processing (PI and PO generation, etc.) and error correction processing in the playback device or recording / playback device having a compatibility function between the current generation DVD and the next generation DVD is performed on the current DVD disc (medium). ) It can be used at the same time as in use, and it is possible to simplify the processing routine and circuit of the playback device or recording / playback device having a compatibility function between the current generation DVD and the next generation DVD. It is done.

  The method of the present invention (method 2) is used to improve the burst error length that can be error-corrected by interleaving the data in the physical sector data 5-0 and 5-16 between the two ECC blocks 7-0 and 7-1. Then, as shown in FIG. 4D, the data row and PI row (even rows) of the logical sector data at the same position (equal row number) in the adjacent ECC blocks 7-0 and 7-1 ( Data 0-0-1, PI0-0-1 and data 16-1-1, PI16-1-1) are exchanged with each other. Data ID information including sector address information is arranged in the first row in each logical sector data. Therefore, by exchanging only even-numbered data rows and PI rows and prohibiting the exchange processing of odd-numbered data rows and PI rows, each physical sector data 5-0 shown in FIG. It is guaranteed that the data ID information including the sector address information is arranged at the head position in 5-16. In addition, in each logical sector data 6-0 and 6-16, there are always 12 rows (even rows) of data and PI rows. Accordingly, the logical sector data 6-0 and 6-16 and the ECC block 7- are exchanged by exchanging the data of the even-numbered rows in the logical sector data 6-0 and 6-16 and the PI row according to the above rules. PO information (PO0-0, PO1-0) in 0, 7-1 is not exchanged and the arrangement position is kept unchanged. This facilitates PO information addition processing and error correction processing. The physical sector data 5-0 and 5-16 created in this way are recorded in the physical sector area 9a in the optical disc (information recording medium 9) according to the data arrangement order in the physical sector data 5-0 and 5-16. The One physical sector data is recorded in one physical sector area 9a.

  Next, an information recording / reproducing apparatus according to an example of the information recording apparatus or information reproducing apparatus of the present invention will be described with reference to FIG.

1. 1. Description of functions of information recording / reproducing apparatus 1-1. Basic functions of the information recording / reproducing apparatus The information recording / reproducing apparatus performs the following processing.

New information is recorded or rewritten (including erasure of information) using a focused spot at a predetermined position on the information recording medium (optical disk) 9.

The information already recorded is reproduced from the predetermined position on the information recording medium (optical disk) 9 using the focused spot.

1-1-1. Basic function achievement means of information recording / reproducing apparatus In the information recording / reproducing apparatus, the following is performed as means for achieving the above basic functions.

Trace the focused spot along a track (not shown) on the information recording medium 9.

The information recording medium 9 is switched to record / reproduce / erase information by changing the amount of light of the focused spot irradiated.

A recording signal d given from the outside is converted into an optimum signal for recording at a high density and a low error rate.

2. 2. Structure of mechanism part and operation of detection part 2-1. Optical head 202 basic structure and signal detection circuit 2-1-1. Signal Detection by the Optical Head 202 The optical head 202 basically includes a semiconductor laser element, a light source (not shown), a photodetector, and an objective lens. Laser light emitted from the semiconductor laser element is focused on an information recording medium (optical disk) 9 by an objective lens. The laser beam reflected by the light reflecting film or the light reflecting recording film of the information recording medium (optical disk) 9 is photoelectrically converted by a photodetector. The detection current obtained by the photodetector is subjected to current-voltage conversion by an amplifier 213 and becomes a detection signal. This detection signal is processed by the focus / track error detection circuit 217 or the binarization circuit 212. In general, a photodetector is divided into a plurality of light detection regions, and changes in the amount of light applied to each light detection region are individually detected. A focus / track error detection circuit 217 calculates a sum / difference for each detection signal to detect a focus shift and a track shift. A signal on the information recording medium 9 is reproduced by detecting a change in the amount of reflected light from the light reflecting film or the light reflecting recording film of the information recording medium (optical disk) 9.

2-1-2. Objective Lens Actuator Structure An objective lens (not shown) that condenses the laser light emitted from the semiconductor laser element onto the information recording medium 9 can move in two axial directions according to the output current of the objective lens actuator drive circuit 218. It has a simple structure. The moving direction of the objective lens is as follows.

Move in the direction perpendicular to the information recording medium 9 for focus deviation correction.

Move in the radial direction of the information recording medium 9 for track deviation correction.

Although not shown, the objective lens moving mechanism is called an objective lens actuator.

2-2. Rotation control system of information recording medium 9 An information recording medium (optical disk) 9 is mounted on a rotary table 221 that is rotated by the driving force of the spindle motor 204. The rotational speed of the information recording medium 9 is detected by a reproduction signal obtained from the information recording medium 9. That is, the detection signal (analog signal) output from the amplifier 213 is converted into a digital signal by the binarization circuit 212, and a constant cycle signal (reference clock signal) is generated from the signal by the PLL circuit 211. The information recording medium rotation speed detection circuit 214 detects the rotation speed of the information recording medium 9 using this signal and outputs the value.

  A correspondence table of information recording medium rotation speeds corresponding to radial positions to be reproduced or recorded / erased on the information recording medium 9 is recorded in the semiconductor memory 219 in advance. When the reproduction position or recording / erasing position is determined, the control unit 220 refers to the semiconductor memory 219 information, sets the target rotational speed of the information recording medium 9, and notifies the spindle motor drive circuit 215 of the value.

  The spindle motor drive circuit 215 obtains a difference between the target rotation speed and the output signal (current rotation speed) of the information recording medium rotation speed detection circuit 214, and supplies a drive current corresponding to the difference to the spindle motor 204. Control is performed so that the rotation speed of the spindle motor 204 is constant. The output signal of the information recording medium rotation speed detection circuit 214 is a pulse signal having a frequency corresponding to the rotational speed of the information recording medium 9, and the spindle motor drive circuit 215 controls both the frequency and the pulse phase of this signal.

2-3. Optical Head Moving Mechanism An optical head moving mechanism (feed motor) 203 is provided for moving the optical head 202 in the radial direction of the information recording medium 9.

3. Functions of each control circuit 3-1. Condensing spot trace control In order to perform focus deviation correction or track deviation correction, a drive current is supplied to an objective lens actuator (not shown) in the optical head 202 in accordance with an output signal (detection signal) of the focus / track error detection circuit 217. The objective lens actuator drive circuit 218 is a circuit that supplies In order to make the objective lens move at high speed up to a high frequency range, it has a phase compensation circuit for improving characteristics in accordance with the frequency characteristics of the objective lens actuator.

  In the objective lens actuator drive circuit 218, the following processing is performed in accordance with a command from the control unit 220.

ON / OFF processing of focus / track deviation correction operation (focus / track loop).

A process of moving the objective lens at a low speed in the vertical direction (focus direction) of the information recording medium 9 (executed when the focus / track loop is OFF).

A process of moving the focused spot to the adjacent track by slightly moving the information recording medium 9 in the radial direction (direction crossing the track) using the kick pulse.

4). Various operations related to the control system of the mechanism part 4-1. Activation Control When an information recording medium (optical disk) 9 is mounted on the rotary table 221 and activation control is started, processing is performed according to the following procedure.

1) The target rotational speed is transmitted from the controller 220 to the spindle motor drive circuit 215, and a drive current is supplied from the spindle motor drive circuit 215 to the spindle motor 204, so that the spindle motor 204 starts to rotate.

2) At the same time, a command (execution command) is issued from the control unit 220 to the feed motor drive circuit 216, a drive current is supplied from the feed motor drive circuit 216 to the optical head drive mechanism (feed motor) 203, and the optical head 202 is moved. It moves to the innermost peripheral position of the information recording medium 9. It is confirmed that the optical head 202 has come to the inner periphery beyond the area where the information on the information recording medium 9 is recorded.

3) When the spindle motor 204 reaches the target rotational speed, the status (status report) is output to the control unit 220.

4) A current is supplied from the semiconductor laser driving circuit 205 to the semiconductor laser element in the optical head 202 in accordance with the reproduction light quantity signal sent from the control unit 220 to the recording / reproducing / erasing control waveform generating circuit 206, and laser emission is started. To do.

  Depending on the type of the information recording medium (optical disk) 9, the optimum irradiation light amount during reproduction differs. At the time of start-up, the lowest irradiation light amount is set.

5) An objective lens actuator that shifts an objective lens (not shown) in the optical head 202 to a position farthest away from the information recording medium 9 according to a command from the control unit 220, and slowly brings the objective lens closer to the information recording medium 9. The drive circuit 218 controls.

6) At the same time, the focus / track error detection circuit 217 monitors the amount of focus deviation, and when the objective lens comes near the in-focus position, outputs a status and notifies the control unit 220 of the status.

7) Upon receiving the notification, the controller 220 issues a command to the objective lens actuator drive circuit 218 to turn on the focus loop.

8) The control unit 220 issues a command to the feed motor drive circuit 216 with the focus loop turned on to move the optical head 202 slowly toward the outer peripheral portion of the information recording medium 9.

9) At the same time, the reproduction signal from the optical head 202 is monitored, and when the optical head 202 reaches the recording area on the information recording medium 9, the movement of the optical head 202 is stopped and the track loop is turned on for the objective lens actuator drive circuit 218. Issue the command

10) The “optimum light amount during reproduction” and “optimum light amount during recording / erasing” recorded on the inner periphery of the information recording medium (optical disk) 9 are reproduced, and the information is transmitted to the semiconductor via the control unit 220. Recorded in the memory 219.

11) Further, the control unit 220 sends a signal in accordance with the “optimal light amount at the time of reproduction” to the recording / reproduction / erasure control waveform generation circuit 206 to reset the light emission amount of the semiconductor laser element at the time of reproduction.

12) The light emission amount of the semiconductor laser element at the time of recording / erasing is set in accordance with the “optimum light amount at the time of recording / erasing” recorded on the information recording medium 9.

4-2. Access control 4-2-1. Reproduction of access destination information on the information recording medium 9 Information regarding what kind of information is recorded at which location on the information recording medium 9 differs depending on the type of the information recording medium 9 and is generally information. It is recorded in a directory management area or a navigation pack in the recording medium 9. The directory management area is an area in which information is recorded in the inner circumference area or the outer circumference area of the information recording medium 9. The navigation pack is included in a VOBS (Video Object Set) conforming to the data structure of the MPEG2 PS (Program Stream) and records information about where the next video is recorded. .

  When reproducing or recording / erasing specific information, information in the above area is first reproduced, and an access destination is determined from the obtained information.

4-2-2. The coarse access control control unit 220 obtains the radial position of the access destination by calculation, and calculates the distance from the current optical head 202 position. Speed curve information that can reach the optical head 202 moving distance in the shortest time is recorded in the semiconductor memory 219 in advance. The control unit 220 reads the information and performs movement control of the optical head 202 by the following method according to the speed curve. After the controller 220 issues a command to the objective lens actuator drive circuit 218 to turn off the track loop, the feed motor drive circuit 216 is controlled to start the movement of the optical head 202. When the focused spot crosses the track on the information recording medium 9, a track error detection signal is generated in the focus / track error detection circuit 217. Using this track error detection signal, the relative speed of the focused spot with respect to the information recording medium 9 can be detected. The feed motor drive circuit 216 calculates the difference between the relative speed of the focused spot obtained from the focus / track error detection circuit 217 and the target speed information sent from the controller 220 one by one, and the result is calculated as an optical head drive mechanism ( The optical head 202 is moved while applying a feedback to the drive current to the (feed motor) 203. As described in “Optical head moving mechanism”, a frictional force always acts between the guide shaft and the bush or the bearing. When the optical head 202 is moving at a high speed, dynamic friction works, but at the time of starting and immediately before stopping, the moving speed of the optical head 202 is slow, so that static friction works. At this time, since the relative frictional force increases (especially immediately before stopping), the amplification factor (gain) of the current supplied to the optical head drive mechanism (feed motor) 203 is increased in accordance with a command from the control unit 220. .

4-2-3. Fine Access Control When the optical head 202 reaches the target position, the controller 220 issues a command to the objective lens actuator drive circuit 218 to turn on the track loop. The focused spot reproduces the address or track number of the portion while tracing along the track on the information recording medium 9. The current focused spot position is determined from the address or track number, the number of error tracks from the target position is calculated in the control unit 220, and the number of tracks necessary for moving the focused spot is calculated as the objective lens actuator drive circuit 218. Notify When one set of kick pulses is generated in the objective lens actuator drive circuit 218, the objective lens slightly moves in the radial direction of the information recording medium 9, and the focused spot moves to the adjacent track. In the objective lens actuator drive circuit 218, the track loop is temporarily turned off, the kick pulse corresponding to the information from the control unit 220 is generated, and then the track loop is turned on again. After the dense access is completed, the control unit 220 reproduces information (address or track number) of the position where the focused spot is traced, and confirms that the target track is being accessed.

4-3. Continuous Recording / Reproducing / Erasing Control As shown in FIG. 6, the track error detection signal output from the focus / track error detection circuit 217 is input to the feed motor drive circuit 216. In the above-described “startup control” and “access control”, the controller 220 controls the feed motor drive circuit 216 not to use the track error detection signal. After confirming that the focused spot has reached the target track by access, a part of the track error detection signal is sent to the optical head drive mechanism (feed motor) 203 via the motor drive circuit 216 by a command from the control unit 220. Is supplied as a drive current. This control is continued during the period of continuous reproduction or recording / erasing processing. The center position of the information recording medium 9 is mounted with an eccentricity slightly shifted from the center position of the rotary table 221. When a part of the track error detection signal is supplied as a drive current, the entire optical head 202 finely moves in accordance with the eccentricity. When the reproduction or recording / erasing process is performed continuously for a long time, the focused spot position gradually moves in the outer circumferential direction or the inner circumferential direction. When a part of the track error detection signal is supplied as a drive current to the optical head moving mechanism (feed motor) 203, the optical head 202 gradually moves in the outer circumferential direction or the inner circumferential direction in accordance with the driving current. In this way, the burden of correcting the track deviation of the objective lens actuator can be reduced, and the track loop can be stabilized.

4-4. End control When a series of processing is completed and the operation is ended, processing is performed according to the following procedure.

1) A command for turning off the track loop is issued from the control unit 220 to the objective lens actuator drive circuit 218.

2) A command to turn off the focus loop is issued from the control unit 220 to the objective lens actuator drive circuit 218.

3) The control unit 220 issues a command to the recording / reproducing / erasing control waveform generation circuit 206 to stop the emission of the semiconductor laser element.

4) Notify the spindle motor drive circuit 215 of 0 as the reference rotational speed.

5. 5. Flow of recording signal / reproducing signal to information recording medium 5-1. Signal format recorded on the information recording medium 9 For the signal recorded on the information recording medium 9, the information recording / reproducing apparatus (physical block) as shown in FIG. "" Signal conversion (signal modulation / demodulation) of recorded information "" is performed.

It is possible to correct a recording information error caused by a defect on the information recording medium 9.

-Simplify the reproduction processing circuit by reducing the DC component of the reproduction signal to zero.

Record information on the information recording medium 9 as densely as possible.

5-2. Signal flow during recording 5-2-1. ECC (Error Correction Code) Addition Processing Information to be recorded on the information recording medium 9 is input to the data input / output interface unit 222 as a recording signal d in the form of a raw signal. The recording signal d is recorded in the semiconductor memory 219 as it is, and then the ECC encoding circuit 208 performs ECC addition processing as follows.

  When the addition of the inner code PI and the outer code PO is completed in the ECC encoding circuit 208, the data for one sector is read from the semiconductor memory 219 and transferred to the modulation circuit 207.

5-2-2. Signal Modulation Signal modulation, which is signal format conversion, is performed in the modulation circuit 207 in order to record the DC component (DSV: Disital Sum Value) of the reproduction signal close to 0 and record information on the information recording medium 9 with high density. . The modulation circuit 207 and the demodulation circuit 210 have a conversion table indicating the relationship between the original signal and the modulated signal. The signal transferred from the ECC encoding circuit 208 is divided into a plurality of bits according to the modulation method, and converted into another signal (code) while referring to the conversion table. For example, when 8/16 modulation (RLL (2,10) code) is used as the modulation method, there are two types of conversion tables, and the conversion table for reference is switched one by one so that the DC component after modulation approaches 0 ing.

5-3. Signal flow during reproduction 5-3-1.2 Binary / PLL circuit As described in “Signal detection by optical head 202”, the light recording film of the information recording medium (optical disk) 9 or the light reflecting recording film A signal on the information recording medium 9 is reproduced by detecting a change in the amount of reflected light. The signal obtained by the amplifier 213 has an analog waveform. The binarization circuit 212 converts the signal into a binary digital signal composed of “1” and “0” using a comparator.

  A reference signal at the time of information reproduction is extracted from the reproduction signal obtained here by the PLL circuit 211. The PLL circuit 211 has a built-in variable frequency oscillator. The frequency and phase between the pulse signal (reference clock) output from the oscillator and the output signal of the binarization circuit 212 are compared, and the result is fed back to the oscillator output.

5-3-2. Demodulation of signal The demodulation circuit 210 has a conversion table indicating the relationship between the modulated signal and the demodulated signal. The signal is returned to the original signal while referring to the conversion table in accordance with the reference clock obtained by the PLL circuit 211. The returned (demodulated) signal is recorded in the semiconductor memory 219.

5-3-4. Error Correction Processing With respect to the signal stored in the semiconductor memory 219, the error correction circuit 209 detects an error location using the inner code PI and the outer code PO, and sets a pointer flag for the error location.

  Thereafter, while reading the signal from the semiconductor memory 219, the signal at the error location is sequentially corrected in accordance with the error pointer flag, and the inner code PI and the outer code PO are removed and transferred to the data input / output interface unit 222.

  The signal sent from the ECC encoding circuit 208 is output from the data input / output interface unit 222 as a reproduction signal c.

  Above, the detailed description regarding FIG. 6 is complete | finished. Next, the format processing procedure executed in the data recording apparatus shown in FIG. 6 will be described with reference to the flowchart shown in FIG.

  The processing described below is processed in the ECC encoding circuit 208 in FIG. 6, and detailed control is performed by the control unit 220. The procedure of FIG. 7 shows the procedure of the data conversion process (format) by (Method 1) shown in FIGS.

  Step 1) Physical sector information 4-0 to 4-31 is set according to the size of the logical sector information 3-0 to 3-31 (divided into main data of 2048 bytes). User data to be recorded is handled in units of 2048 bytes.

  Step 2) A 2068-byte data sector is generated from 2048-byte main data, 16-byte auxiliary data, and 4-byte error detection code (EDC).

As shown in FIG. 8, the 16-byte auxiliary data is composed of 4-byte data ID data (PID), 2-byte error detection code (IED) for the data ID, and 10-byte spare data (RSV). The PID records a sector number used for identifying a data sector and sector information used for identifying the contents of the data sector. The IED is used to detect errors that occur in the PID part. The RSV is used for recording other auxiliary information such as copyright management information. The EDC is used to detect errors occurring in the 2064-byte main data and auxiliary data. The data sectors are arranged in 188 columns and 11 rows as shown in FIG.

  Step 3) The scramble data is added to the 2048-byte portion of the main data in the data sector.

  Step 4) The data sectors in FIG. 8 are rearranged as shown in FIG. 9 depending on whether the sector number is even or odd. The numbers in FIG. 9 indicate row numbers in the data sector. Further, as shown in FIG. 9, rearrangement such as type α and type β can be considered.

  Step 5) A sector block is generated by vertically stacking 32 consecutive data sectors rearranged according to the sector number. As shown in FIG. 10, the data sectors stacked in the vertical direction are arranged in 376 columns and 176 rows.

  Step 6) The error correction code is encoded by dividing the sector block into two in the horizontal direction. The respective blocks of 188 columns and 176 rows after the division are encoded in the column direction to generate 16 rows of outer code parity (PO). As the outer code, a Reed-Solomon code of RS (192, 176, 17) is used. Next, the inner code is encoded in the row direction to generate inner code parity (PI) of 12 columns. As the inner code, a Reed-Solomon code of RS (200, 188, 13) is used. The ECC block including the parity generated by the outer code and the inner code is as shown in FIG.

  Step 7) Row interleaving is performed on the ECC block, and POs with 16 rows on the left and right are distributed in the block. 16 × 2 = 32 rows of PO are distributed to each sector one row at a time. At that time, the PO row of the left block is inserted next to the bottom row of the even sector having only 5 rows, and the PO row of the right block is inserted next to the bottom row of the odd sector having only 5 rows. As a result, the ECC block after row interleaving is shown in FIG.

  Step 8) Complete the physical sector data. FIG. 12 shows completed physical sector data.

  Step 9) A zigzag recording arrangement is set.

  Step 10) Perform modulation processing. If the bit sequence of the data to be recorded is recorded on the medium as it is, the characteristics of the recording data sequence and the recording characteristics of the medium do not match, so that efficient recording cannot be performed. In view of the recording characteristics of the medium, the data pattern is converted according to a predetermined conversion rule. Examples of modulation schemes include 8/16 modulation schemes that convert 1-byte data into 16-bit patterns, 8/12 modulation schemes that convert 1.5-byte patterns, or 18-bit 12-bit data 12/18 modulation method for converting to the above pattern. Each method is composed of a plurality of conversion tables and a logic circuit for selecting the conversion tables.

  In particular, the 12/18 modulation method that converts 1.5-byte data has the characteristic that an error at one location expands to 1.5 bytes. It is effective in dispersing.

  As described above, the steps 1 to 10 are obtained, and zigzag recording is performed according to the setting of ST9. Here, the zigzag recording will be described in detail. The physical sector data structure shown in FIG. The size to be finely divided is, for example, in units of 1 byte as shown in FIG. However, in the present invention, the division unit length is not limited thereto, and may be, for example, a 2-byte unit or a 4-byte unit. Next, data is selected and extracted across each division unit, and data is recorded in the physical sector area 9a on the optical disc (information recording medium 9) in the order of selection and extraction. One physical sector data is recorded in one physical sector area 9a.

  For example, as shown in FIG. 13, two upper and lower rows are grouped, and upper and lower rows of data are extracted alternately (in a zigzag manner) for each of the above-mentioned division units. The data leaked from the extraction in the set is alternately fetched and recorded in the physical sector area 9a on the optical disc (information recording medium 9).

  Although the formatting method for the method (method 1) is mainly described here, the processing in step 9 is also effective for the method (method 2). In particular, in the method (2), since adjacent rows belong to different ECC blocks 7-0 and 7-1 as shown in FIGS. 4 and 5, the data is sequentially rearranged across the rows in this way. Therefore, the data distribution across the ECC blocks 7-0 and 7-1 is performed, so that error distribution at a finer level than the interleave processing across the ECC blocks 7-0 and 7-1 in units of rows can be achieved. It becomes possible.

  In FIG. 13, data is extracted in a zigzag manner within a set of 2 rows, but not limited to this, for example, data is extracted sequentially over 3 rows, or data is divided sequentially for every division unit across all 6 rows. May be selected and extracted and rearranged in the physical sector area 9a on the optical disc (information recording medium 9) for recording.

  As a different recording method, ECC block data different for each row may be alternately recorded every several bytes, for example, every byte.

  Further, even if data of one row is recorded in order, it does not hinder the basic features of the present invention.

  Further, the physical sector information part is rearranged at any stage prior to step 6 so that auxiliary information including at least IDs is continued on the recording data sequence in accordance with the data recording order in step 9. May be.

  As described above, the information recording medium on which the physical sector data is recorded is reproduced by the information recording / reproducing apparatus shown in FIG. That is, physical sector data is read from a predetermined number (32) of physical sector areas 9a, n (2) ECC blocks are generated from the read physical sector data, and error correction processing is performed. Sector data is generated from the ECC block and reproduced.

  Specifically, first, from the predetermined number of physical sector data read from the predetermined number of physical sector areas 9a, the reverse of the process of generating the predetermined number of physical sector data from the n ECC blocks is used. n ECC blocks are generated. That is, the two ECC blocks shown in FIG. 3 are generated from the physical sector data shown in FIG. Subsequently, the generated n ECC blocks are returned to the n ECC blocks before row interleaving using the reverse of the process of generating the ECC block after row interleaving from the ECC block before row interleaving. That is, the two n ECC blocks shown in FIG. 3 are returned to the n ECC blocks shown in FIG. At this time, error correction processing is performed using the outer code parity and the inner code parity added to the ECC block. Subsequently, the ECC block is returned to the sector block using the reverse of the process of generating the ECC block from the sector block. That is, the outer code parity and the inner code parity are removed from the ECC block shown in FIG. 11, and the sector block shown in FIG. 10 is generated. Subsequently, a data sector is generated from the sector block using the reverse of the process of generating the sector block from the data sector. That is, the data sector shown in FIG. 9 is generated from the sector block shown in FIG. Since the generated data sector has been rearranged, the data sector is reproduced after being returned to the original arrangement.

  The physical sector data has a data structure in which a data ID is arranged at the head and a data line including only a part of the parity of the outer code is arranged as the last line. Therefore, the information recording / reproducing apparatus shown in FIG. 6 can reproduce the data ID by reading the head of the physical sector data. In the physical sector area, data extracted alternately from different data lines in the physical sector data is recorded in order (zigzag recording). Therefore, the information recording / reproducing apparatus reproduces the physical sector area on the assumption that data extracted alternately from different data lines is recorded.

  FIG. 14 shows another embodiment of the data structure in the physical sector data in (Method 1). As shown in FIG. 14, there is a data structure from (A) to (C), which is an application example that can basically be created through the above steps.

  With reference to the flowchart shown in FIG. 7 again, the format process in the case of FIG.

  The processing described below is processed in the ECC encoding circuit 208 in FIG. 6, and detailed control is performed by the control unit 220.

  Step 1) Physical sector information 4-0 to 4-31 is set in accordance with the size of the logical sector information 3-0 to 3-31 shown in FIGS. 1 and 2 (divided into main data of 2048 bytes). User data to be recorded is handled in units of 2048 bytes.

  Step 2) A 2064-byte data sector is generated from 2048-byte main data, 12-byte auxiliary data, and 4-byte error detection code (EDC). As shown in FIG. 16, the 12-byte auxiliary data includes 4-byte data ID data (PID), 2-byte error detection code (IED) corresponding to the data ID, and 6-byte spare data (RSV). The data sectors are arranged in 172 columns and 12 rows as shown in FIG.

  Step 3) The scramble data is added to the 2048-byte portion of the main data in the data sector.

  Step 4) The data sectors in FIG. 16 are rearranged according to whether the sector number is even or odd, as shown in FIG. The numbers in FIG. 17 indicate row numbers in the data sector. Further, as shown in FIG. 17, rearrangement such as type α and type β can be considered.

  Step 5) A sector block is generated by vertically stacking 32 consecutive data sectors rearranged according to the sector number. As shown in FIG. 18, the data sectors stacked in the vertical direction are arranged in 344 columns and 192 rows.

  Step 6) The error correction code is encoded by dividing the sector block into two in the horizontal direction. The respective blocks of 172 columns and 192 rows after the division are encoded in the column direction to generate 16 rows of outer code parity (PO). As the outer code, a Reed-Solomon code of RS (208, 192, 17) is used. Next, the inner code is encoded in the row direction to generate inner code parity (PI) of 12 columns. As the inner code, a Reed-Solomon code of RS (184, 172, 13) is used. An ECC block including parity generated by the outer code and the inner code is as shown in FIG.

  Step 7) Row interleaving is performed on the ECC block, and POs with 16 rows on the left and right are distributed in the block. 16 × 2 = 32 rows of PO are distributed to each sector one row at a time. The distribution destination is next to the bottom row of the even-numbered sector in the left block and next to the bottom row of the odd-numbered sector in the right block. As a result, the ECC block after row interleaving is shown in FIG.

  Step 8) Complete the physical sector data. The completed physical sector data is shown in FIG.

  Step 9) In this case, the setting of the zigzag recording arrangement is omitted. The reason is that two different physical sector data are complicated in the bottom line of the physical sector data (see FIG. 15). In this case, if the zigzag recording arrangement is performed, two different physical sector data are mixed in one physical sector area.

  Step 10) Perform modulation processing. If the bit sequence of the data to be recorded is recorded on the medium as it is, the characteristics of the recording data sequence and the recording characteristics of the medium do not match, so that efficient recording cannot be performed. In view of the recording characteristics of the medium, the data pattern is converted according to a predetermined conversion rule.

  As described above, the information recording medium on which the physical sector data is recorded is reproduced by the information recording / reproducing apparatus shown in FIG. That is, physical sector data is read from a predetermined number (32) of physical sector areas 9a, n (2) ECC blocks are generated from the read physical sector data, and error correction processing is performed. Sector data is generated from the ECC block and reproduced.

  Specifically, first, from the predetermined number of physical sector data read from the predetermined number of physical sector areas 9a, the reverse of the process of generating the predetermined number of physical sector data from the n ECC blocks is used. n ECC blocks are generated. That is, two ECC blocks shown in FIG. 15 are generated from the physical sector data shown in FIG. Subsequently, the generated n ECC blocks are returned to the n ECC blocks before row interleaving using the reverse of the process of generating the ECC block after row interleaving from the ECC block before row interleaving. That is, the two n ECC blocks shown in FIG. 15 are returned to the n ECC blocks shown in FIG. At this time, error correction processing is performed using the outer code parity and the inner code parity added to the ECC block. Subsequently, the ECC block is returned to the sector block using the reverse of the process of generating the ECC block from the sector block. That is, the outer code parity and the inner code parity are removed from the ECC block shown in FIG. 19, and the sector block shown in FIG. 18 is generated. Subsequently, a data sector is generated from the sector block using the reverse of the process of generating the sector block from the data sector. That is, the data sector shown in FIG. 17 is generated from the sector block shown in FIG. Since the generated data sector has been rearranged, the data sector is reproduced after being returned to the original arrangement.

  The physical sector data has a data structure in which a data ID is arranged at the head and a data line including only a part of the parity of the outer code is arranged as the last line. Therefore, the information recording / reproducing apparatus shown in FIG. 6 can reproduce the data ID by reading the head of the physical sector data.

  The points of the present invention described above will be summarized below.

(1) One physical sector data is divided for each row including the PI, and data for each row is allocated to each of a plurality of ECC blocks.

(2) The data ID in all physical sectors is always arranged at the head position. This structure matches the data arrangement in the physical sector of the current DVD. In this way, by making the data arrangement in the important part in the physical sector coincide with the current DVD standard, the playback device having the compatibility function between the current generation DVD and the next generation DVD or the access control part in the recording / playback device, The sector dress detection confirmation processing part can be shared, and the in-device control can be simplified.

(3) All physical sector sizes are matched.

(4) “2ECC block = 32 physical sectors” is set as a basic unit in accordance with the SOBU size, and all data in the 32 physical sectors are all allocated in 2ECC blocks in the basic unit.

(5) Match physical sector information and logical sector information. One physical sector data is divided into rows including PI, and data for each row is sequentially allocated to n (n ≧ 2) ECC blocks, and includes PI in one physical sector data. The total number of lines and PO lines is an integer multiple of n.

(6) All information in one logical sector is included in the same ECC block data.

(7) In the same physical sector, data in rows allocated to different ECC blocks are sequentially selected and recorded on the optical disc.

  The present embodiment described above is as follows.

  (1) The information recording medium includes a plurality of physical sector areas for recording physical sector data generated by a combination of some data included in a plurality of ECC blocks.

  (2) The information recording medium described in (1) is further as follows.

That is, the ECC block is generated by obtaining a predetermined process,
In the predetermined step,
A data sector composed of the first number of bytes is generated,
A plurality of the data sectors are collected to generate a sector block,
The sector block is divided into n to generate n divided blocks,
Parity is individually added to each of the n divided blocks to generate n independent ECC blocks.

  (3) The information recording medium described in (1) is further as follows.

That is, the ECC block is generated by obtaining a predetermined process,
In the predetermined step,
A data sector including a data ID and composed of a first number of bytes is generated,
A plurality of the data sectors are collected to generate a sector block,
The sector block is divided into n to generate n divided blocks,
Outer code parity is generated by encoding data in the column direction constituting the divided block,
Inner code parity is generated by encoding row-direction data constituting the divided block,
The outer code parity and the inner code parity generated for the divided block are added, and n independent ECC blocks are generated.

  (4) The information recording medium described in (1) above is further as follows.

That is, the ECC block is generated by obtaining a predetermined process,
In the predetermined step,
A data sector including a data ID and composed of a first number of bytes is generated,
The data included in the data sector is rearranged at a predetermined position to generate rearranged sector data,
A sector block is generated by collecting a plurality of the rearranged sector data,
The sector block is divided into n to generate n divided blocks,
Outer code parity is generated by encoding data in the column direction constituting the divided block,
Inner code parity is generated by encoding row-direction data constituting the divided block,
By adding the outer code parity and the inner code parity generated for the divided block, n independent ECC blocks are generated.

  (5) The information recording medium described in the above (3) or (4) is further as follows.

That is, the physical sector data is
A data line of a second number of bytes composed of a part of the data sector and a part of the inner code parity, and a data line of the second number of bytes composed only of a part of the outer code parity. It is composed of an aggregate, and the total number of data lines of this aggregate is an integer multiple of n.

  (6) The information recording medium described in the above (3) or (4) is further as follows.

That is, the physical sector data is
The data ID is included, and the data ID is arranged at a specific position.

  (7) The information recording medium described in (3) or (4) is further as follows.

That is, the physical sector data is
The data structure includes the data ID, the data ID is arranged at the head, and the data line including only a part of the parity of the outer code is arranged as the last line.

  (8) The information recording medium described in (1) is further as follows.

That is, the physical sector area is
This is an area in which data extracted sequentially from the physical sector data based on a predetermined rule is sequentially recorded.

  (9) The information recording medium described in (5) is further as follows.

That is, the physical sector area is
This is an area in which data extracted alternately from different data lines in the physical sector data is recorded in order.

  (10) The information recording medium described in (2), (3), or (4) is further as follows.

  That is, physical sector information indicating physical sector data recorded in the physical sector area corresponds to logical sector information indicating the data sector.

  (11) The information recording medium described in (10) is further as follows.

  The arrangement of at least a part of data in at least one ECC block among the n ECC blocks corresponds to the logical sector information.

  (12) An information recording apparatus for recording information on an information recording medium generates physical sector data by combining a part of data included in a plurality of ECC blocks, and the physical sector data is stored on the information recording medium. Recording means for recording in the physical sector area is provided.

  (13) The information recording apparatus according to (12) is further as follows.

That is, it comprises an ECC block generating means for generating the ECC block,
The ECC block generation means includes:
Generating a data sector including a data ID and composed of a first number of bytes;
The data included in the data sector is rearranged at a predetermined position to generate rearranged sector data,
Collect a plurality of the rearranged sector data to generate a sector block,
Dividing the sector block into n pieces to generate n divided blocks;
Encode the data in the column direction constituting the divided block to generate an outer code parity;
Encode the data in the row direction constituting the divided block to generate inner code parity,
The outer code parity and the inner code parity generated for the divided block are added to generate n independent ECC blocks.

  (14) The information recording apparatus according to (13) is further as follows.

That is, the physical sector data is
A data line of a second number of bytes composed of a part of the data sector and a part of the inner code parity, and a data line of the second number of bytes composed only of a part of the outer code parity. It is composed of an aggregate, and the total number of data lines of this aggregate is an integer multiple of n.

  (15) The information recording apparatus according to (13) is further as follows.

That is, the physical sector data is
The data structure includes the data ID, the data ID is arranged at the head, and the data line including only a part of the parity of the outer code is arranged as the last line.

  (16) The information recording apparatus described in (13) is further as follows.

That is, the recording means
Data is extracted sequentially from the physical sector data based on a predetermined rule, and the extracted data is recorded in the physical sector area in order.

  (17) The information recording apparatus according to (13) is further as follows.

That is, the recording means
Data is alternately extracted from different data lines in the physical sector data, and the extracted data is sequentially recorded in the physical sector area.

  (18) The information recording apparatus according to (13) is further as follows.

That is, the recording means
The physical sector data is recorded in the physical sector area so that physical sector information indicating the physical sector data corresponds to logical sector information indicating the data sector.

  (19) The information recording apparatus described in (18) is further as follows.

That is, the recording means
The physical sector data is recorded in the physical sector area so that the arrangement of at least a part of data in at least one ECC block among the n ECC blocks corresponds to the logical sector information.

  (20) In an information recording method for recording information on an information recording medium, physical sector data is generated by combining a part of data included in a plurality of ECC blocks, and the physical sector data is stored on the information recording medium. Record in the physical sector area.

  (21) The information recording method described in (20) is further as follows.

That is, the ECC block is generated by obtaining a predetermined process,
In the predetermined step,
Generating a data sector including a data ID and composed of a first number of bytes;
The data included in the data sector is rearranged at a predetermined position to generate rearranged sector data,
Collect a plurality of the rearranged sector data to generate a sector block,
Dividing the sector block into n pieces to generate n divided blocks;
Encode the data in the column direction constituting the divided block to generate an outer code parity;
Encode the data in the row direction constituting the divided block to generate inner code parity,
The outer code parity and the inner code parity generated for the divided block are added to generate n independent ECC blocks.

  (22) The information recording method described in (21) is further as follows.

That is, the physical sector data is
A data line of a second number of bytes composed of a part of the data sector and a part of the inner code parity, and a data line of the second number of bytes composed only of a part of the outer code parity. It is composed of an aggregate, and the total number of data lines of this aggregate is an integer multiple of n.

  (23) The information recording method described in (21) is further as follows.

That is, the physical sector data is
The data structure includes the data ID, the data ID is arranged at the head, and the data line including only a part of the parity of the outer code is arranged as the last line.

  (24) The information recording method described in (20) above is further as follows.

  That is, data is extracted sequentially from the physical sector data based on a predetermined rule, and the extracted data is recorded in the physical sector area in order.

  (25) The information recording method described in (22) above is further as follows.

  That is, data is alternately extracted from different data lines in the physical sector data, and the extracted data is sequentially recorded in the physical sector area.

  (26) The information recording method described in (21) is as follows.

  That is, the physical sector data is recorded in the physical sector area so that the physical sector information indicating the physical sector data corresponds to the logical sector information indicating the data sector.

  (27) The information recording method described in (26) is further as follows.

  That is, the physical sector data is recorded in the physical sector area so that the arrangement of at least a part of data in at least one ECC block among the n ECC blocks corresponds to the logical sector information.

  (28) An information reproducing apparatus for reproducing an information recording medium provided with a plurality of physical sector areas in which physical sector data generated by a combination of some data included in a plurality of ECC blocks is recorded is provided on the information recording medium. There is provided reproduction means for reading physical sector data from a predetermined number of physical sector areas, generating a plurality of ECC blocks from the read physical sector data, and reproducing the read physical sector data.

  (29) The information reproducing apparatus according to (28) is further as follows.

That is, the ECC block is generated by obtaining a predetermined process,
In the predetermined step,
A data sector including a data ID and composed of a first number of bytes is generated,
The data included in the data sector is rearranged at a predetermined position to generate rearranged sector data,
A sector block is generated by collecting a plurality of the rearranged sector data,
The sector block is divided into n to generate n divided blocks,
Outer code parity is generated by encoding data in the column direction constituting the divided block,
Inner code parity is generated by encoding row-direction data constituting the divided block,
By adding the outer code parity and the inner code parity generated for the divided block, n independent ECC blocks are generated,
The reproducing means reproduces the data sector using the predetermined process.

  (30) The information reproducing apparatus according to (29) is further as follows.

That is, the physical sector data is
A data line of a second number of bytes composed of a part of the data sector and a part of the inner code parity, and a data line of the second number of bytes composed only of a part of the outer code parity. Composed of aggregates, where the total number of data lines in the aggregate is an integer multiple of n,
Further, the physical sector data includes the data ID, has a data structure in which the data ID is arranged at the head and a data line including only a part of the parity of the outer code is arranged as the last line. And
The reproducing means reproduces the data ID from the head of the physical sector data.

  (31) The information reproducing apparatus according to (28) is further as follows.

That is, in the physical sector area,
Data extracted sequentially from the physical sector data based on a predetermined rule is recorded in order,
The reproducing means reproduces the physical sector area on the assumption that the recording is performed based on the predetermined law.

  (32) The information reproducing apparatus according to (30) is further as follows.

That is, in the physical sector area,
Data extracted alternately from different data lines in the physical sector data are recorded in order,
The reproducing means reproduces the sector area on the premise that data extracted alternately from different data lines is recorded.

  (33) An information reproducing method for reproducing an information recording medium provided with a plurality of physical sector areas in which physical sector data generated by a combination of some data included in a plurality of ECC blocks is recorded is provided on the information recording medium. A reproduction step of reading physical sector data from a predetermined number of physical sector areas, generating a plurality of ECC blocks from the read physical sector data, and reproducing the read physical sector data.

  (34) The information reproduction method described in (33) above is further as follows.

That is, the ECC block is generated by obtaining a predetermined process,
In the predetermined step,
A data sector including a data ID and composed of a first number of bytes is generated,
The data included in the data sector is rearranged at a predetermined position to generate rearranged sector data,
A sector block is generated by collecting a plurality of the rearranged sector data,
The sector block is divided into n to generate n divided blocks,
Outer code parity is generated by encoding data in the column direction constituting the divided block,
Inner code parity is generated by encoding row-direction data constituting the divided block,
By adding the outer code parity and the inner code parity generated for the divided block, n independent ECC blocks are generated,
The reproduction step reproduces the data sector using the predetermined step.

  (35) The information reproduction method described in (34) above is further as follows.

That is, the physical sector data is
A data line of a second number of bytes composed of a part of the data sector and a part of the inner code parity, and a data line of the second number of bytes composed only of a part of the outer code parity. Composed of aggregates, where the total number of data lines in the aggregate is an integer multiple of n,
Further, the physical sector data includes the data ID, has a data structure in which the data ID is arranged at the head and a data line including only a part of the parity of the outer code is arranged as the last line. And
In the reproduction step, the data ID is reproduced from the head of the physical sector data.

  (36) The information reproduction method according to (33) is further as follows.

That is, in the physical sector area,
Data extracted sequentially from the physical sector data based on a predetermined rule is recorded in order,
In the reproducing step, the physical sector area is reproduced on the assumption that the recording is performed based on the predetermined rule.

  (37) The information reproduction method described in (35) above is further as follows.

That is, in the physical sector area,
Data extracted alternately from different data lines in the physical sector data are recorded in order,
In the reproduction step, the sector area is reproduced on the assumption that data extracted alternately from different data lines is recorded.

  Note that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention in the implementation stage. In addition, the embodiments may be appropriately combined as much as possible, and in that case, the combined effect can be obtained. Further, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent requirements are deleted from all the constituent requirements shown in the embodiment, the problem described in the column of the problem to be solved by the invention can be solved, and the effect described in the column of the effect of the invention Can be obtained as an invention.

It is a figure which shows the data structure of the physical sector data produced | generated from several ECC block, and the relationship etc. of physical sector information and logical sector information. It is a figure which shows the data structure of the physical sector data recorded on an information recording medium, and the relationship between several physical sector data and several (two) ECC block corresponding to this. It is a figure which shows the data structure of the ECC block after completion | finish of row interleaving in case one data sector is comprised by the odd number row. It is a figure which shows the data structure of the physical sector data produced | generated from the single ECC block, and the relationship etc. of physical sector information and logical sector information. It is a figure which shows the data structure of the physical sector data recorded on an information recording medium, and the relationship between several physical sector data and the single ECC block corresponding to this. It is a block diagram which shows schematic structure of the information recording / reproducing apparatus based on an example of this invention. It is a flowchart for demonstrating the production | generation of an ECC block, and the recording of physical sector data. It is a figure which shows the data structure of a data sector in case one data sector is comprised by the odd number line. It is a figure which shows an example of the rearrangement of a data sector in case one data sector is comprised by the odd number line. It is a figure which shows the data structure of a sector block in case one data sector is comprised by the odd number line. It is a figure which shows a mode that the sector block shown in FIG. 10 was divided into 2 in the horizontal direction, and the outer code parity and the inner code parity were added to each block. It is a figure which shows the data structure of the physical sector data produced | generated from the ECC block after completion of row interleaving shown in FIG. It is a figure which shows a mode that the data contained in physical sector data are zigzag-recorded. It is a figure which shows the example of arrangement | positioning of the outer code | symbol (PO) in physical sector data. It is a figure which shows the data structure of the ECC block after completion | finish of row interleaving in case one data sector is comprised by the even number row. It is a figure which shows the data structure of a data sector in case one data sector is comprised by the even number line. It is a figure which shows an example of the rearrangement of a data sector when one data sector is comprised by the even number line. It is a figure which shows the data structure of a sector block in case one data sector is comprised by the even number line. FIG. 19 is a diagram illustrating a state in which the sector block illustrated in FIG. 18 is divided into two in the horizontal direction and an outer code parity and an inner code parity are added to each block. FIG. 16 is a diagram showing a data structure of physical sector data generated from an ECC block after completion of row interleaving shown in FIG. 15.

Explanation of symbols

9. Information recording medium (optical disk)
202 ... Optical head 206 ... Recording / playback / erasing control waveform generation circuit 208 ... ECC encoding circuit 220 ... Control unit

Claims (5)

An information recording medium comprising a plurality of physical sector areas in which physical sector data is recorded,
The physical sector data is data generated through a predetermined process,
The predetermined step includes
M (m: even) data frames composed of left and right frames are generated, and the odd-numbered data frame among the m data frames is a first data row having a data ID at the head position. The left frame in which odd-numbered rows are arranged and the right frame in which even-numbered rows are arranged with the nth data row (n: even number) having an error detection code at the final position as the last row, and these m pieces of data The even-numbered data frame of the frame includes a right frame in which odd-numbered rows are arranged with the first data row having the data ID at the head position as the head row, and an n-th data row (n :)) and the left frame with the even number of rows as the last row,
Stack m data frames vertically and generate a first outer code parity composed of m / 2 data rows for m left frames and a first inner code parity And generating a second outer code parity composed of m / 2 data rows for m right frames, and generating a second inner code parity,
Generate an ECC block including m left frames, the first outer code parity, the first inner code parity, m right frames, the second outer code parity, and the second inner code parity. And
A step of generating m physical sector data by combining a part of data included in the ECC block;
An information storage medium comprising the m physical sector areas in which the generated m physical sector data are recorded. An information recording apparatus for recording information on an information recording medium,
generating means for generating m physical sector data;
Recording means for recording the generated m physical sector data in m physical sector areas on an information recording medium;
With
The generating means includes
M (m: even) data frames composed of left and right frames are generated, and the odd-numbered data frame among the m data frames is a first data row having a data ID at the head position. The left frame in which odd-numbered rows are arranged and the right frame in which even-numbered rows are arranged with the nth data row (n: even number) having an error detection code at the final position as the last row, and these m pieces of data The even-numbered data frame of the frame includes a right frame in which odd-numbered rows are arranged with the first data row having the data ID at the head position as the head row, and an n-th data row (n :)) and the left frame with the even number of rows as the last row,
Stack m data frames vertically and generate a first outer code parity composed of m / 2 data rows for m left frames and a first inner code parity And generating a second outer code parity composed of m / 2 data rows for m right frames, and generating a second inner code parity,
Generate an ECC block including m left frames, the first outer code parity, the first inner code parity, m right frames, the second outer code parity, and the second inner code parity. And
Generating m physical sector data by combining a part of data included in the ECC block;
An information recording apparatus characterized by that. An information recording method for recording information on an information recording medium,
M (m: even) data frames composed of left and right frames are generated, and the odd-numbered data frame among the m data frames is a first data row having a data ID at the head position. The left frame in which odd-numbered rows are arranged and the right frame in which even-numbered rows are arranged with the nth data row (n: even number) having an error detection code at the final position as the last row, and these m pieces of data The even-numbered data frame of the frame includes a right frame in which odd-numbered rows are arranged with the first data row having the data ID at the head position as the head row, and an n-th data row (n :)) and the left frame with the even number of rows as the last row,
Stack m data frames vertically and generate a first outer code parity composed of m / 2 data rows for m left frames and a first inner code parity And generating a second outer code parity composed of m / 2 data rows for m right frames, and generating a second inner code parity,
Generate an ECC block including m left frames, the first outer code parity, the first inner code parity, m right frames, the second outer code parity, and the second inner code parity. And
Generating m physical sector data by combining a part of data included in the ECC block;
Recording the generated m physical sector data in m physical sector areas on an information recording medium;
An information recording method characterized by the above. An information reproducing apparatus for reproducing information from an information recording medium,
Reading means for reading m physical sector data generated through a predetermined process from m physical sector areas on the information recording medium;
A first outer code parity, a first inner code parity, a second outer code parity included in an ECC block generated based on the predetermined step from the m physical sector data read by the reading unit; Reproducing means for reproducing m physical sector data using the second inner code parity;
With
The predetermined step includes
M (m: even) data frames composed of left and right frames are generated, and the odd-numbered data frame among the m data frames is a first data row having a data ID at the head position. The left frame in which odd-numbered rows are arranged and the right frame in which even-numbered rows are arranged with the nth data row (n: even number) having an error detection code at the final position as the last row, and these m pieces of data The even-numbered data frame of the frame includes a right frame in which odd-numbered rows are arranged with the first data row having the data ID at the head position as the head row, and an n-th data row (n :)) and the left frame with the even number of rows as the last row,
Stack m data frames vertically and generate a first outer code parity composed of m / 2 data rows for m left frames and a first inner code parity And generating a second outer code parity composed of m / 2 data rows for m right frames, and generating a second inner code parity,
Generate an ECC block including m left frames, the first outer code parity, the first inner code parity, m right frames, the second outer code parity, and the second inner code parity. And
A step of generating m physical sector data by combining a part of data included in the ECC block;
An information reproducing apparatus characterized by that. An information reproducing method for reproducing information from an information recording medium,
Read m physical sector data generated through a predetermined process from m physical sector areas on the information recording medium,
A first outer code parity, a first inner code parity, a second outer code parity, and a second outer parity included in an ECC block generated based on the predetermined process from the read m physical sector data. Reproducing m physical sector data using inner code parity,
The predetermined step includes
M (m: even) data frames composed of left and right frames are generated, and the odd-numbered data frame among the m data frames is a first data row having a data ID at the head position. The left frame in which odd-numbered rows are arranged and the right frame in which even-numbered rows are arranged with the nth data row (n: even number) having an error detection code at the final position as the last row, and these m pieces of data The even-numbered data frame of the frame includes a right frame in which odd-numbered rows are arranged with the first data row having the data ID at the head position as the head row, and an n-th data row (n :)) and the left frame with the even number of rows as the last row,
Stack m data frames vertically and generate a first outer code parity composed of m / 2 data rows for m left frames and a first inner code parity And generating a second outer code parity composed of m / 2 data rows for m right frames, and generating a second inner code parity,
Generate an ECC block including m left frames, the first outer code parity, the first inner code parity, m right frames, the second outer code parity, and the second inner code parity. And
A step of generating m physical sector data by combining a part of data included in the ECC block;
An information reproduction method characterized by the above.

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