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    Digital modulation apparatus, a digital modulation method, and a recording medium therefor
    3.
    发明授权
    Digital modulation apparatus, a digital modulation method, and a recording medium therefor 失效
    数字调制装置，数字调制方法及其记录介质

    公开(公告)号：US5917857A

    公开(公告)日：1999-06-29

    申请号：US764024

    申请日：1996-12-11

    申请人： Shin-ichi Tanaka ,  Toshiyuki Shimada ,  Tadashi Kojima ,  Koichi Hirayama ,  Yoshiaki Moriyama ,  Fumihiko Yokogawa ,  Takao Arai ,  Toshifumi Takeuchi

    发明人： Shin-ichi Tanaka ,  Toshiyuki Shimada ,  Tadashi Kojima ,  Koichi Hirayama ,  Yoshiaki Moriyama ,  Fumihiko Yokogawa ,  Takao Arai ,  Toshifumi Takeuchi

    IPC分类号： G11B20/14 ,  H03M5/14 ,  H03M7/14 ,  H04L25/49 ,  H04B14/04 ,  H03M7/00

    CPC分类号： H03M5/145 ,  G11B20/1426

    摘要： A digital modulation apparatus applies a method for converting data words to runlength-limited code words using plural conversion tables. The data words are converted to code words that significantly suppress the low frequency component of the final nonreturn-to-zero inverted signal.This digital modulation apparatus includes ROM tables for storing plural conversion tables containing the runlength-limited code words corresponding to the data words; end-runlength memories and evaluators for determining whether the runlength-limit constraints are satisfied in the interconnection between two consecutive code words when the data words to be converted are supplied; and a DSV controller for storing each of the code words that can be selected from two conversion tables to buffer memories when the runlength-limit constraints are satisfied, and selecting the code words wit the greatest effect suppressing the low frequency component in the obtained signal when the code words are NRZI converted.

    摘要翻译： 数字调制装置应用一种使用多个转换表将数据字转换成游程长度限制码字的方法。 数据字被转换成显着抑制最终的非归零到反相信号的低频分量的码字。 该数字调制装置包括用于存储包含对应于数据字的游程限制码字的多个转换表的ROM表; 终端游程长度存储器和评估器，用于在提供要转换的数据字时确定在两个连续码字之间的互连中是否满足游程限制约束; 以及DSV控制器，用于当满足游程长度限制约束时，将可从两个转换表中选择的每个代码字存储到缓冲存储器，并且选择在获得的信号中抑制低频分量的最大效应的代码字， 代码字被NRZI转换。

    Recording medium, recording method and apparatus, and reproduction method and apparatus
    4.
    发明授权
    Recording medium, recording method and apparatus, and reproduction method and apparatus 失效
    记录介质，记录方法和装置以及再现方法和装置

    公开(公告)号：US5881037A

    公开(公告)日：1999-03-09

    申请号：US887944

    申请日：1997-07-01

    申请人： Shin-ichi Tanaka ,  Toshiyuki Shimada ,  Tadashi Kojima ,  Koichi Hirayama

    发明人： Shin-ichi Tanaka ,  Toshiyuki Shimada ,  Tadashi Kojima ,  Koichi Hirayama

    IPC分类号： G11B20/10 ,  G11B20/12 ,  G11B20/14 ,  G11B20/18 ,  G11B27/30 ,  H03M7/14 ,  G11B7/00 ,  G11B7/24 ,  H04N5/76

    CPC分类号： G11B27/3027 ,  G11B20/1426 ,  G11B20/1813

    摘要： A digital video disk stores data codes and multifunctional synchronization codes in a data structure. The synchronization codes contain type information code identifying whether the synchronization code is located in a code sequence at the beginning of the data block, the beginning of a data block sector other than the first sector in the data block, the beginning of a line, or the middle of a line. The type information is expressed by two alternative patterns, type information code 1 and type information code 2, expressing the same information and differing in the number of is in the 5-bit sequence, i.e., an odd or even number of 1s. Which one of the two type information code pattern is used is selected according to the DSV so as to minimize bias in the dc component of the frame following the synchronization code.

    摘要翻译： 数字视频盘在数据结构中存储数据代码和多功能同步代码。 同步码包含识别同步代码是否位于数据块开始处的代码序列中的类型信息代码，除了数据块中的第一扇区之外的数据块扇区的开始，行的开头，或者 一条线的中间 类型信息由表示相同信息的类型信息码1和类型信息码2的两种替代模式表示，5位序列中的数量，即奇数或偶数1。 根据DSV选择使用两种类型信息码模式中的哪一种，以便最小化跟随同步码的帧的直流分量中的偏差。

    Recording medium data transmission method and apparatus and data reproduction method and apparatus
    5.
    发明授权
    Recording medium data transmission method and apparatus and data reproduction method and apparatus 失效
    记录介质数据传输方法及装置及数据再现方法及装置

    公开(公告)号：US5912869A

    公开(公告)日：1999-06-15

    申请号：US626551

    申请日：1996-04-02

    申请人： Shin-ichi Tanaka ,  Toshiyuki Shimada ,  Tadashi Kojima ,  Koichi Hirayama

    发明人： Shin-ichi Tanaka ,  Toshiyuki Shimada ,  Tadashi Kojima ,  Koichi Hirayama

    IPC分类号： G11B20/12 ,  G11B20/14 ,  G11B27/19 ,  G11B27/30 ,  H03M5/14 ,  H03M7/14 ,  H03M13/23 ,  H04B14/04 ,  H04L1/00 ,  H04L7/04 ,  H04L25/49 ,  G11B5/76 ,  G11B5/09

    CPC分类号： H04L1/0057 ,  G11B20/1217 ,  G11B20/1426 ,  G11B27/19 ,  G11B27/3027 ,  H03M13/23 ,  H03M5/145 ,  H04L25/4908 ,  G11B2220/20 ,  H04L7/041

    摘要： A data transmission apparatus for transmitting an original data has a converter for converting the original data to sequential data codes. The data code is formed by a combination of HIGH level binary codes and LOW level binary codes. The maximum length of a continuous binary codes of one level, such as HIGH level, in the data codes is limited to T.sub.max, e.g., to 14T, in which T is a unit length representing one binary code, and the minimum length of a continuous binary codes of one level, such as HIGH level, in the data codes is limited to T.sub.min, e.g., 3T. A generator generates a synchronization code. The synchronization code is formed by a combination of HIGH and LOW level binary codes. The synchronization code comprises an identifier having a continuous binary codes of one level, such as HIGH level, with a predetermined length 16T which is 2T greater than T.sub.max. An inserter inserts the synchronization code intermittently in the sequential data codes.

    摘要翻译： 用于发送原始数据的数据发送装置具有用于将原始数据转换为顺序数据代码的转换器。 数据代码由高级二进制代码和低级二进制代码的组合形成。 数据码中一个等级的连续二进制码（如高电平）的最大长度限制在Tmax，例如14T，其中T是表示一个二进制码的单位长度，连续的最小长度 数据码中一级的二进制码（如高电平）被限制为Tmin，例如3T。 生成器生成同步代码。 同步码由高和低电平二进制码的组合形成。 同步码包括具有一个等级的连续二进制码的标识符，例如高电平，具有比Tmax大2T的预定长度16T。 插入器在顺序数据代码中间歇地插入同步代码。

    Apparatus for generating, recording and transmitting an error product code block having an improved check code arrangement
    7.
    发明授权
    Apparatus for generating, recording and transmitting an error product code block having an improved check code arrangement 失效
    用于生成，记录和传送具有改进的检验码排列的错误产品代码块的装置

    公开(公告)号：US06182263B2

    公开(公告)日：2001-01-30

    申请号：US09121302

    申请日：1998-07-23

    申请人： Tadashi Kojima ,  Koichi Hirayama ,  Yoshihisa Fukushima ,  Takashi Yumiba

    发明人： Tadashi Kojima ,  Koichi Hirayama ,  Yoshihisa Fukushima ,  Takashi Yumiba

    IPC分类号： G11C2900

    CPC分类号： H04L1/0057 ,  G11B20/18 ,  G11B20/1833 ,  H03M13/00 ,  H03M13/15 ,  H03M13/151 ,  H03M13/1515 ,  H03M13/29 ,  H03M13/2903 ,  H03M13/2906 ,  H03M13/2909 ,  H03M13/35 ,  H03M13/6516 ,  H04L1/0065

    摘要： There is provided an apparatus for processing data for generating an error correction product code block devised so as to maintain the current level of redundancy after the error correcting ability is modified as a result of advancement of semiconductor and data recording/transmission technologies. Unlike any known technique of configuring a Reed-Solomon error correcting product code block of (M+P0)×(N+PI) bytes for an information data of (M×N) bytes, an error correcting product code block data structure is obtained by configuring a (K×(M+1)×(N+P))-byte Reed-Solomon error correcting product code block for (K×M×N)-byte data, making K variable to consequently make the entire size of the Reed-Solomon error correcting product code block variable. At the same time, the error correcting ability varies in proportion to the value of K without increasing redundancy.

    摘要翻译： 提供了一种用于处理数据的装置，用于产生纠错产品代码块，用于在通过半导体和数据记录/传输技术的进步改进纠错能力之后维持当前的冗余水平。 与对于（M×N）字节的信息数据配置（M + P0）×（N + PI）个字节的Reed-Solomon错误校正乘积码块的任何已知技术不同，通过配置获得纠错产物码块数据结构 （KxMxN）字节数据的（Kx（M + 1）×（N + P））字节Reed-Solomon错误校正乘积码块，从而使K变量使得Reed-Solomon纠错产品的整体大小 代码块变量。 同时，纠错能力与K的值成比例地变化，而不增加冗余度。