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76 条记录 (耗时 0.02 秒)

    Optical disc having oscillating lands and grooves
    16.
    发明公开
    Optical disc having oscillating lands and grooves 失效
    具有振荡台和凹槽的光盘

    公开(公告)号：EP0973156A3

    公开(公告)日：2000-02-02

    申请号：EP99119777.3

    申请日：1997-10-24

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Ishida, Takashi ,  Tanaka, Shin-ichi ,  Mutoh, Akira ,  Takemura, Yoshinari ,  Ohara, Shunji ,  Satoh, Isao

    IPC分类号： G11B7/007

    CPC分类号： G11B7/0938 ,  G11B7/007 ,  G11B7/00718 ,  G11B7/00745 ,  G11B7/24082 ,  G11B27/19 ,  G11B27/3027 ,  G11B2220/20 ,  G11B2220/211

    摘要： In an optical disc, an ID field contains a plurality of address information, and is preliminarily recorded in convex and concave signals, and is composed of two sets offset by about 1/2 track pitch toward the internal or external track direction adjacent to the guide track, an information recording field is composed of grooves and lands oscillating at a single frequency in the radial direction, and the grooves and lands alternate in every revolution of the guide track. When w bits of information are included in one period of oscillation, an information unrecorded field between the ID field and information recording field is arranged to have a length of w/10 bits or more and/or w bits or less, and therefore, when recording continuous information data such as video data, it is possible to record continuously by generating a clock securely from the oscillating signal, and moreover, the format efficiency is improved, so that a format of a larger capacity is achieved.

    摘要翻译： 在光盘中，ID字段包含多个地址信息，并且预先记录在凸和凹信号中，并且由两组偏移大约1/2轨道间距朝向邻近导向件的内部或外部轨道方向 信息记录场由在径向上以单一频率振荡的凹槽和平台组成，并且凹槽和平台在导轨的每次旋转中交替。 当在一个振荡周期中包括w位信息时，ID字段和信息记录字段之间的信息未记录字段被布置为具有w / 10位或更多和/或w位或更少的长度，因此，当 记录诸如视频数据的连续信息数据，可以通过从振荡信号安全地产生时钟来连续地进行记录，此外，可以提高格式效率，从而实现更大容量的格式。

    A method of maximum likelihood decoding and a digital information playback apparatus
    19.
    发明公开
    A method of maximum likelihood decoding and a digital information playback apparatus 失效
    用于再现数字信息为最大似然解码和装置的方法

    公开(公告)号：EP0750306A3

    公开(公告)日：1997-12-17

    申请号：EP96304604.0

    申请日：1996-06-21

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Takeshi, Nakajima ,  Furumiya, Shigeru ,  Takemura, Yoshinari ,  Koishi, Kenji

    IPC分类号： G11B20/10

    CPC分类号： G11B20/10148 ,  G11B20/10009 ,  H03M13/41 ,  H03M13/4107 ,  H03M13/6331 ,  H03M13/6343

    摘要： A digital information playback apparatus comprises an A/D converter (14;19;32) that converts a playback signal into digital data, a maximum likelihood decoder (16;21;33) that decodes the quantized data output from the A/D converter (14;19;32) to obtain the original digital information, and a timing signal extractor (17;22;34) that generates a sampling clock used in the A/D converter (14;19;32) . The maximum likelihood decoder (16;21;33) detects the response characteristic of the record/playback system and obtains level fluctuations contained in the playback signal, based on the survival path obtained as a maximum likelihood decoding result, to control the expected multilevel equalized values used in the maximum likelihood decoder (16;21;33). The timing signal extractor (17;22;34) obtains level fluctuations, based on the survival path obtained as a maximum likelihood decoding result, and obtains the component of the level fluctuations due to phase shifts of the sampling clock to control the phase of the sampling clock.

    A method of maximum likelihood decoding and a digital information playback apparatus
    20.
    发明公开
    A method of maximum likelihood decoding and a digital information playback apparatus 失效
    用于再现数字信息为最大似然解码和装置的方法

    公开(公告)号：EP0750306A2

    公开(公告)日：1996-12-27

    申请号：EP96304604.0

    申请日：1996-06-21

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Takeshi, Nakajima ,  Furumiya, Shigeru ,  Takemura, Yoshinari ,  Koishi, Kenji

    IPC分类号： G11B20/10

    CPC分类号： G11B20/10148 ,  G11B20/10009 ,  H03M13/41 ,  H03M13/4107 ,  H03M13/6331 ,  H03M13/6343

    摘要： A digital information playback apparatus comprises an A/D converter (14;19;32) that converts a playback signal into digital data, a maximum likelihood decoder (16;21;33) that decodes the quantized data output from the A/D converter (14;19;32) to obtain the original digital information, and a timing signal extractor (17;22;34) that generates a sampling clock used in the A/D converter (14;19;32) . The maximum likelihood decoder (16;21;33) detects the response characteristic of the record/playback system and obtains level fluctuations contained in the playback signal, based on the survival path obtained as a maximum likelihood decoding result, to control the expected multilevel equalized values used in the maximum likelihood decoder (16;21;33). The timing signal extractor (17;22;34) obtains level fluctuations, based on the survival path obtained as a maximum likelihood decoding result, and obtains the component of the level fluctuations due to phase shifts of the sampling clock to control the phase of the sampling clock.

    摘要翻译： 一种数字信息重放装置包括：以A / D转换器（14; 19; 32）的重放信号的最大似然解码器（21; 16 33）转换成数字数据，没有对从A / D转换器输出的量化数据 （14; 19; 32），以获得原始的数字信息，以及定时信号提取器（17; 22; 34），其产生在A / D转换器中使用的采样时钟（14; 19; 32）。 最大似然解码器（16; 21; 33）检测的记录/重放系统的响应特性，并且获得包含在再现信号电平的波动，基于解码结果而获得的最大似然残存路径上，以控制期望的多级均衡 在最大似然译码器中使用的值（16; 21; 33）。 定时信号提取器（17; 22; 34）获得水平的波动，基于获得作为最大似然解码结果的生存路径上，并且获得水平的波动是由于取样时钟的相移的分量控制的相位 采样时钟。