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    MODULATION APPARATUS AND METHOD
    2.
    发明公开
    MODULATION APPARATUS AND METHOD 审中-公开
    MODULATIONSGERAET UND -VERFAHREN

    公开(公告)号：EP1367582A4

    公开(公告)日：2008-07-30

    申请号：EP03701717

    申请日：2003-01-15

    Applicant: SONY CORP

    Inventor： NAKAGAWA TOSHIYUKI ,  OKAMURA HIROSHIGE ,  TOBITA MINORU

    IPC: G11B20/14 ,  H03M5/14 ,  H03M7/14 ,  H04L25/49

    CPC classification number: H03M5/145 ,  G11B20/1426 ,  H04L25/4908 ,  H04L25/4915

    Abstract: A modulation apparatus and a modulation method having a simple circuit structure for realizing a modulation apparatus and capable of being easily applied to another system. According to a conversion table, a pattern converter (32) converts data supplied to a DSV control bit decision/insert unit (31) and having a basic data length of 2 bits into a variable length code having a basic code length of 3 bits. Moreover, a minimum run continuation limit code detector (33) detects from the data string into which the DSV control bit is inserted a position where the channel bit string converted by the pattern converter (32) is continuation of the minimum run. According to the position information supplied to the minimum run continuation limit code detector (33), a continuous minimum run replacement unit (34) replaces a predetermined portion of the channel bit string supplied to the pattern converter (32) by a predetermined pattern, thereby limiting the continuation of the minimum run within a predetermined number of times. The present invention can be applied to a modulation apparatus.

    Abstract translation: 一种调制装置和调制方法，具有用于实现调制装置的简单电路结构，并且能够容易地应用于其他系统。 根据转换表，模式转换器（32）将提供给DSV控制比特判定/插入单元（31）并具有2比特的基本数据长度的数据转换为具有3比特基本代码长度的可变长度代码。 此外，最小游程继续限制代码检测器（33）从插入了DSV控制位的数据串中检测由模式转换器（32）转换的通道位串是最小游程继续的位置。 根据提供给最小游程继续限制代码检测器（33）的位置信息，连续最小游程替换单元（34）以预定模式替换提供给模式转换器（32）的通道比特串的预定部分，由此 在预定次数内限制最小运行的延续。 本发明可以应用于调制装置。

    MODULATION APPARATUS AND METHOD, AND DSV CONTROL BIT GENERATION METHOD
    3.
    发明公开
    MODULATION APPARATUS AND METHOD, AND DSV CONTROL BIT GENERATION METHOD 审中-公开
    调制装置和方法以及DSV STEUERBITERZEUGUNGSVERFAHREN

    公开(公告)号：EP1469473A4

    公开(公告)日：2005-08-17

    申请号：EP03705009

    申请日：2003-01-22

    Applicant: SONY CORP

    Inventor： NAKAGAWA TOSHIYUKI ,  TOBITA MINORU ,  OKAMURA HIROSHIGE

    IPC: G11B20/14 ,  H03M5/14 ,  H03M7/14 ,  H04L25/49

    CPC classification number: G11B20/1426 ,  H03M5/145

    Abstract: A modulation apparatus and method, and a DSV control bit generation method capable of deciding a DSV control bit value to be inserted into a data string accurately. A 1-7PP data conversion unit (52) supplies a modulation break detection unit (81) with modulation break information consisting of information on the modulation break of a data string using the conversion table of Table 3 and a valid break detection unit (82) with a DSV interval break signal including information on a DSV interval break position of the data string into which a DSV control bit has been inserted. According to the modulation break information supplied, the modulation break detection unit (81) detects a modulation break position and supplies a modulation break signal to the valid break detection unit (82). According to the DSV interval break signal supplied, the valid break detection unit (82) detects a valid break position controlling the judgment timing of the DSV control bit of the corresponding DSV interval among the modulation break positions indicated by the modulation break signal supplied. The present invention can be applied to a modulation apparatus.

    4.
    发明专利
    未知

    公开(公告)号：NL194850B

    公开(公告)日：2002-12-02

    申请号：NL9400770

    申请日：1994-05-09

    Applicant: SONY CORP

    Inventor： TOBITA MINORU

    IPC: G11B20/18 ,  G11B7/005 ,  G11B11/105 ,  G11B20/10

    Abstract: An optical reproducing apparatus, for example, an optical magnetic disc device for reproducing data, has been recorded on a disc recording medium by applying the Viterbi decoding method, or the like, and can effectively avoid the deterioration of bit error rate even if the DC level fluctuates. When Viterbi decoding the reproducing signal by converting it into digital values, if a transition pattern in which the signal level of the reproducing signal transits across the center level is detected, the center level is corrected.

    8.
    发明专利
    未知

    公开(公告)号：DE69532231T2

    公开(公告)日：2004-10-21

    申请号：DE69532231

    申请日：1995-09-06

    Applicant: SONY CORP

    Inventor： SAKO YOICHIRO ,  YAMAGAMI TAMOTSU ,  OTSUKA SATOSHI ,  TOBITA MINORU

    IPC: G11B20/12 ,  G11B20/18

    Abstract: Data recorded on such a recording medium as an optical disk, are reproduced excellently even when burst errors occur during reproduction, without reducing the data record capacity of the recording medium. A first error correcting code is generated for every block of a certain amount of data, and added to the corresponding block, a second error correcting code is generated for the every block and added to the other blocks than the block for which the second error correcting code is generated. These data and codes are recorded on the recording medium. When reproducing the data, recorded on the recording medium in blocks of data, whether or not detection correction is possible or not is judged based on the first error correcting codes included in the reproduced data. When the detection correction of a block is possible, the detection correction is performed, and when impossible, missing information is generated based on the second error correcting codes reproduced from the data blocks and corresponding to the block of which detection correction is impossible. Using the missing information and the first error correcting code, missing correction of the data block is performed.

    9.
    发明专利
    未知

    公开(公告)号：DE69531527T4

    公开(公告)日：2004-09-23

    申请号：DE69531527

    申请日：1995-09-12

    Applicant: SONY CORP

    Inventor： SAKO YOICHIRO ,  YAMAGAMI TAMOTSU ,  OTSUKA SATOSHI ,  TOBITA MINORU

    IPC: G11B7/007 ,  G11B20/12 ,  G11B20/18 ,  G11B27/19 ,  G11B27/30

    Abstract: Method of recording on a record medium (4) by receiving a series of data elements, adding error detection and error correction data to each data element, moving some of the data in each data element to an adjacent data element to produce arranged data elements, and recording the arranged data elements in different sectors on a record medium (4). Upon reproduction of the arranged data elements from a record medium (4), some of the data in each arranged data element are moved to an adjacent data element to produce rearranged data elements. Errors in each rearranged data element are detected and corrected using data contained therein. A record medium (4) having concentric tracks on which a plurality of sectors are located stores data in each of the sectors. The data in each sector pertains to two different sectors so that the affect of a burst error on a particular sector is minimized.

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