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29 条记录 (耗时 0.018 秒)

    Data demodulation apparatus
    5.
    发明公开
    Data demodulation apparatus 失效
    数据解调装置

    公开(公告)号：EP0343670A3

    公开(公告)日：1991-08-21

    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.

    Data recording/reproducing apparatus using a recording disk
    6.
    发明公开
    Data recording/reproducing apparatus using a recording disk 失效
    Datenaufzeichnungs-wiedergabegerätau e einer Aufzeichnungsscheibe。

    公开(公告)号：EP0375342A2

    公开(公告)日：1990-06-27

    申请号：EP89313251.4

    申请日：1989-12-19

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Shimada, Toshiyuki ,  Aoki, Kazuhiro 85 Manshion Matsubara 202 ,  Kurahashi, Akira ,  Kikuchi, Noburo

    IPC分类号： G11B7/00 ,  G11B20/10

    CPC分类号： G11B20/10037 ,  G11B7/0037 ,  G11B11/10515 ,  G11B11/1053 ,  G11B11/10576 ,  G11B20/10 ,  G11B20/10009 ,  G11B20/10046 ,  G11B20/10222 ,  G11B20/22

    摘要： An equalizer apparatus is to be applied to a disk recording medium of DBF, for which there is used a sampling clock reproduced from the clock pit recorded on a disk recording medium. A fixed equalizer block comprising an analog to digital converter, a memory and a two-­dimension equalizer suppresses the wave interference from the adjacent tracks and can reduce the error rate of the reproduced data by cross-talk even in case of narrowing of the track pitch. Further, by adding to the equalizer a sign detector, an FIR low-pass filter and a coefficient control circuit to make it a blind equalizer block, the interference fluctuation attributed to linear recording density, recording power irregularity, light spot, tracking error, etc. can be automatically compensated to suppress such fluctuation. Further, By the construction of the blind equalizer block, the errors of clock timing and its fluctuation can be automatically compensated with good efficiency.

    摘要翻译： 将均衡器装置应用于DBF的盘记录介质，其中使用从记录在盘记录介质上的时钟凹坑再现的采样时钟。 包括模数转换器，存储器和二维均衡器的固定均衡器块抑制来自相邻轨道的波干扰，并且即使在轨道间距变窄的情况下也可以通过串扰降低再现数据的误码率 。 此外，通过向均衡器添加符号检测器，FIR低通滤波器和系数控制电路以使其成为盲均衡器块，归因于线性记录密度，记录功率不规则性，光点，跟踪误差等的干扰波动 可以自动补偿以抑制这种波动。 此外，通过构造盲均衡器块，可以以良好的效率自动补偿时钟定时及其波动的误差。

    Signal recording/reproducing apparatus
    7.
    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.

    Data demodulation apparatus
    9.
    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。