Information recording medium, information reproduction apparatus, and information recording apparatus
    54.
    发明授权
    Information recording medium, information reproduction apparatus, and information recording apparatus 失效
    信息记录介质,信息再现装置和信息记录装置

    公开(公告)号:US06757230B2

    公开(公告)日:2004-06-29

    申请号:US09916591

    申请日:2001-07-30

    IPC分类号: G11B700

    摘要: An information recording medium of this invention has a spiral track. The spiral track has one or more header fields per round of the spiral track, and a data field located between neighboring header fields. The data field has a variable length corresponding to an integer multiple of a predetermined length Lw so as to minimize a deviation between the n-th header field in a predetermined round of the spiral track, and the n-th header field in a round different from the predetermined round in the track direction.

    摘要翻译: 本发明的信息记录介质具有螺旋轨迹。 螺旋轨迹每循环轨道具有一个或多个报头字段,以及位于相邻报头字段之间的数据字段。 数据字段具有对应于预定长度Lw的整数倍的可变长度,以便最小化螺旋形轨道的预定回合中的第n个报头字段与轮的不同的第n个报头字段之间的偏差 从轨道方向上的预定轮。

    Data generation method and apparatus
    55.
    发明授权
    Data generation method and apparatus 失效
    数据生成方法和装置

    公开(公告)号:US06338155B1

    公开(公告)日:2002-01-08

    申请号:US09285457

    申请日:1999-04-02

    申请人: Chosaku Noda

    发明人: Chosaku Noda

    IPC分类号: G11C2900

    CPC分类号: G11B20/1833 G11B27/3027

    摘要: A data generator generating a data stream having a first data generation unit and a second data generation unit. The first data generation unit recording data on a recording medium with a first recording density. The first and second units encoding input digital data in accordance with a first error correction coding to generate a first check parity, making a unit block having a data area and the first check parity provided at an end of data area, and dividing the unit block. The first unit providing a sync pattern at a head of each of the first divided areas to obtain a first data stream. The second data generation unit recording data on a recording medium with a second recording density. The second unit providing a sync pattern at a head of the unit block to obtain a second data stream.

    摘要翻译: 产生具有第一数据生成单元和第二数据生成单元的数据流的数据生成单元。 第一数据生成单元在具有第一记录密度的记录介质上记录数据。 第一单元和第二单元根据第一纠错编码编码输入数字数据,以产生第一校验奇偶校验,使得具有数据区的单位块和在数据区的结尾设置的第一校验奇偶校验,并将单位块 。 第一单元在每个第一分割区域的头部提供同步模式以获得第一数据流。 第二数据生成单元在具有第二记录密度的记录介质上记录数据。 第二单元在单元块的头部提供同步模式以获得第二数据流。

    Recording data generation method, recording medium on which data is recorded, and data reproducing apparatus
    56.
    发明授权
    Recording data generation method, recording medium on which data is recorded, and data reproducing apparatus 失效
    记录数据生成方法,记录数据的记录介质和数据再现装置

    公开(公告)号:US06175686B1

    公开(公告)日:2001-01-16

    申请号:US08845493

    申请日:1997-04-25

    申请人: Chosaku Noda

    发明人: Chosaku Noda

    IPC分类号: H04N591

    摘要: A method of generating recording data of an extended format corresponding to a recording density higher than that of a standard format, includes the steps of dividing an input data sequence into a plurality of channels in units of predetermined data, performing error correction encoding for the respective channels by using the same error correction code as that of the standard format, thereby generating error correction blocks, synthesizing the error correction blocks of the respective channels, and generating recording data of the extended format from the synthesized error correction block.

    摘要翻译: 一种生成对应于高于标准格式的记录密度的记录密度的扩展格式的记录数据的方法包括以下步骤:以预定数据为单位将输入数据序列划分为多个通道,对相应的数据进行纠错编码 通过使用与标准格式相同的纠错码,从而产生纠错块,合成各个通道的纠错块,并从合成误差校正块生成扩展格式的记录数据。

    Reproduction signal evaluation method
    59.
    发明授权
    Reproduction signal evaluation method 有权
    繁殖信号评估方法

    公开(公告)号:US07394740B2

    公开(公告)日:2008-07-01

    申请号:US11493799

    申请日:2006-07-27

    IPC分类号: G11B7/00

    摘要: A reproduction signal evaluation method of this invention includes the step of obtaining a reproduction signal from an information recording medium on which digital information is recorded with record marks having different sizes, the step of obtaining the amplitude of a first reproduction signal, of the signals contained in the reproduction signal, which reflects digital information recorded with a record mark having the maximum size, the step of obtaining the amplitude of a second reproduction signal, of the signals contained in the reproduction signal, which reflects digital information recorded with a record mark having the second smallest size, the step of obtaining an evaluation value from the ratio of the amplitudes of the first and second reproduction signals, and the step of evaluating a characteristic of the reproduction signal on the basis of the evaluation value.

    摘要翻译: 本发明的再现信号评估方法包括以下步骤:从其中记录数字信息的信息记录介质获得具有不同尺寸的记录标记的步骤,获得包含的信号的第一再现信号的幅度 在再现信号中,其反映用具有最大尺寸的记录标记记录的数字信息,获得包含在再现信号中的信号的第二再现信号的幅度的步骤,该信号反映用记录有记录标记的数字信息, 第二最小尺寸,从第一和第二再现信号的幅度的比值获得评估值的步骤,以及基于评估值评估再现信号的特性的步骤。