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33 条记录 (耗时 0.022 秒)

    Data detection apparatus
    5.
    发明公开
    Data detection apparatus 失效
    Gerätzur Datenermittlung

    公开(公告)号：EP0763825A2

    公开(公告)日：1997-03-19

    申请号：EP96114812.9

    申请日：1996-09-16

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Horibe, Ryusuke ,  Ishibashi, Hiromiti ,  Shimada, Toshiyuki ,  Miyachi, Hiroyuki

    IPC分类号： G11B20/14

    CPC分类号： H03L7/081 ,  G11B19/12 ,  G11B20/1403 ,  G11B27/3027 ,  H03L7/0891 ,  H03L7/113

    摘要： A reproduced signal is digitized so as to count a time interval of a specified pattern simultaneously with the count of a clock period of a phase lock loop circuit. A phase lock loop clock frequency is subjected to a feedback control based on the information indicating the difference between the time interval and the clock period. In this manner, a frequency loop performs a feedback operation so that a frequency of the reproduced signal falls within a capture range of a phase lock-in, thereby increasing the speed of phase lock-in.

    摘要翻译： 再现信号被数字化，以便与锁相环电路的时钟周期的计数同时计数指定模式的时间间隔。 基于指示时间间隔和时钟周期之间的差异的信息，对锁相环时钟频率进行反馈控制。 以这种方式，频率环路执行反馈操作，使得再现信号的频率落入相位锁定的捕获范围内，从而增加相位锁定的速度。

    Data demodulation apparatus
    7.
    发明公开
    Data demodulation apparatus 失效
    Verfahren zur Datendemodulation。

    公开(公告)号：EP0343670A2

    公开(公告)日：1989-11-29

    申请号：EP89109464.1

    申请日：1989-05-26

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Shimada, Toshiyuki ,  Aoki, Kazuhiro ,  Kurahashi, Akira ,  Kikuchi, Noboru

    IPC分类号： G11B20/14 ,  H03M5/14

    CPC分类号： G11B20/10037 ,  G11B20/1426

    摘要： A data demodulation apparatus applicable to a playback input signal from a digital recording apparatus, which executes A/D conversion of the input signal with a sampling period that is equal to the bit separation of that signal, and obtains phase data for reproducing the phase of the clock signal component of the input signal each time that a "1" state bit is detected in a sampling period. For each sampling period, or set of successive sampling periods, data values are derived which respectively represent a number of bit positions of the input signal within that period and the presence or absence of "1" state bits in the period, and these data values are converted to serial form to respectively constitute a reproduced clock signal and a detected data signal.

    摘要翻译： 一种数据解调装置，适用于来自数字记录装置的重放输入信号，其以等于该信号的位分离的采样周期执行输入信号的A / D转换，并且获得用于再现相位数据的相位数据 每当在采样周期中检测到“1”状态位时，输入信号的时钟信号分量。 对于每个采样周期或连续采样周期的集合，导出数据值，其分别表示在该周期内的输入信号的位数，以及该周期中是否存在“1”状态位，并且这些数据值 被转换为串行形式以分别构成再生时钟信号和检测数据信号。

    Signal recording/reproducing apparatus
    8.
    发明公开
    Signal recording/reproducing apparatus 失效
    信号记录/再现设备

    公开(公告)号：EP0400678A3

    公开(公告)日：1991-01-23

    申请号：EP90110504.9

    申请日：1990-06-01

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Shimada, Toshiyuki ,  Aoki, Kazuhiro, Matsubara ,  Kurahashi, Akira ,  Kikuchi, Noboru

    IPC分类号： G11B5/012 ,  G11B5/016 ,  G11B23/18

    CPC分类号： G11B5/09 ,  G11B5/012 ,  G11B5/4886 ,  G11B20/10 ,  G11B20/22 ,  G11B21/003

    摘要： A signal recording/reproducing apparatus equipped with a recording head section for recording signals on a recording medium and a reproducing head section for reproducing the signals recorded on the recording medium. The recording head section is arranged to record the signal to form N recording sub-tracks on the recording medium and the reproducing head section has M reproducing sub-heads which trace the N recording sub-tracks to reproduce the recording signal. The pitch of the M sub-heads thereof is equal to a pitch of the recording sub-tracks and the number M of the sub-heads is greater than the number N of the recording sub-tracks. The reproducing head section is coupled to a reproduction signal detecting section which in turn eliminates the interference and the crosstalk between adacent tracks from the reproduced signal due to the reproducing head section. This arrangement allows narrowing the track pitch to increase the recording capacity and extremely improving the transfer rate concurrently with the elimination of the the interference between the adjacent codes and crosstalk between the adjacent tracks.

    Optical disk reproducing apparatus
    9.
    发明公开
    Optical disk reproducing apparatus 失效
    光盘重放装置

    公开(公告)号：EP0727782A1

    公开(公告)日：1996-08-21

    申请号：EP96102148.2

    申请日：1996-02-14

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Horibe, Ryusuke ,  Imura, Masaharu ,  Shimada, Toshiyuki

    IPC分类号： G11B20/14 ,  G11B19/247

    CPC分类号： G11B20/1403

    摘要： The optical disk reproducing apparatus of the invention includes: a waveform equalizing section for emphasizing a predetermined range of frequency band of a reproduced signal; a digitizing section for digitizing the reproduced signal which has been emphasized by the wave equalizing section at a predetermined level, so as to convert the emphasized reproduced signal into a digital signal; a period detecting section for detecting and outputting a period of a predetermined pattern included in the digital signal; a phase lock loop section having a free-run period, for controlling the free-run period based on the output of the period detecting section so that the free-run period becomes substantially equal to a period of a clock component of the digital signal, and for outputting a reproduced clock signal by reproducing the clock component of the digital signal; and a synchronizing section for synchronizing the digital signal with the reproduced clock signal so as to output a synchronized signal as reproduced data.

    摘要翻译： 本发明的光盘再现设备包括：波形均衡部分，用于强调再现信号的预定范围的频带; 数字化部分，用于数字化由波均衡部分强调的预定电平的再现信号，以将强调的再现信号转换为数字信号; 周期检测部分，用于检测并输出包括在数字信号中的预定模式的周期; 一个具有自由运行周期的锁相环部分，用于根据周期检测部分的输出来控制自由运行周期，使得自由运行周期基本上等于数字信号的时钟部分周期， 并通过再现数字信号的时钟分量来输出再现时钟信号; 以及同步部分，用于使数字信号与再生时钟信号同步，以便输出作为再生数据的同步信号。