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1. 发明授权

US06674707B2 Digital recorded data reproducing device 失效
标题翻译：数字记录数据再现装置
公开(公告)号：US06674707B2
公开(公告)日：2004-01-06
申请号：US09936513
申请日：2001-11-13
申请人： Youichi Ogura , Koichi Urita , Shinichiro Sato , Yoshimasa Oda
发明人： Youichi Ogura , Koichi Urita , Shinichiro Sato , Yoshimasa Oda
IPC分类号： G11B700
CPC分类号： H03M13/39 , G11B20/10 , G11B20/10009 , G11B20/10046 , G11B20/10425 , G11B20/14 , G11B20/18 , G11B2020/00065 , G11B2020/1287
摘要： In a digital recorded data reproduction which applies PRML signal processing, it is an object to enhance a reproduction signal quality and a playability for an abnormal signal by an offset correction and a phase-interpolation-type digital phase-locked loop. A prescribed frequency band of a reproduction signal is emphasized by a waveform equalizing unit 2, and its output signal is sampled by an asynchronous clock at an analog/digital converter 3. After a sampling signal is subjected to the offset correction, PR equalization is performed by a transversal filter 6 and a tap weighting factor control unit 8 which applies LMS algorithm, and a signal of a regular sampling phase is reproduced from its output signal by a high-order interpolation filter 7 employing a digital phase-locked loop 11. The reproduced signal in a regular phase is demodulated by a maximum likelihood decoder 12, thereby to reproduce digital data recorded on a medium.
摘要翻译：在应用PRML信号处理的数字记录数据再现中，目的是通过偏移校正和相位插值型数字锁相环来增强异常信号的再现信号质量和可播放性。再现信号的规定频带由波形均衡单元2强调，其输出信号由模/数转换器3的异步时钟进行采样。对采样信号进行偏移校正后，执行PR均衡通过横向滤波器6和采用LMS算法的抽头权重因子控制单元8，并且通过采用数字锁相环11的高阶内插滤波器7从其输出信号再现正常采样相位的信号。常规相位的再现信号由最大似然解码器12解调，从而再现记录在介质上的数字数据。

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