公开(公告)号：EP0750306B1

公开(公告)日：2002-06-05

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

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.

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。