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15 条记录 (耗时 0.016 秒)

    Read out apparatus for reading out information from magneto-optic disk
    2.
    发明公开
    Read out apparatus for reading out information from magneto-optic disk 失效
    Wiedergabegerätzur Wiedergabe von信息aus einer magnetooptischen Scheibe。

    公开(公告)号：EP0505253A2

    公开(公告)日：1992-09-23

    申请号：EP92400687.7

    申请日：1992-03-16

    申请人： FUJITSU LIMITED

    发明人： Taguchi, Masakazu, c/o Fujitsu Limited ,  Futamata, Akio, c/o Fujitsu Limited ,  Moritsugu, Masaharu, c/o Fujitsu Limited ,  Izumi, Haruhiko, c/o Fujitsu Limited

    IPC分类号： G11B11/10 ,  G11B20/10 ,  G11B7/00

    CPC分类号： G11B20/10222 ,  G11B11/10515 ,  G11B11/1053 ,  G11B11/10597 ,  G11B20/10009 ,  G11B20/1217 ,  G11B20/1426 ,  G11B2220/2525

    摘要： A read out apparatus reads out prerecorded information from a magneto-optic disk (10) by detecting intervals of edges of magnetic domains (D) formed on the magneto-optic disk with different directions of magnetization, where the intervals of the edges of the magnetic domains correspond to data "1"s or "0"s of the prerecorded information. The read out apparatus includes a first part (21-23) for producing a read out signal by scanning the magnetic domains of the magneto-optic disk, a second part (24) for producing an edge detection signal which has rising and falling edges depending on leading and trailing edges of the magnetic domains, and for correcting edge positions of the edge detection signal based on predetermined information, a third part (25) including a phase locked loop circuit for producing a clock signal which is synchronized to the rising and falling edges of the edge detection signal, and a fourth part (26) for separating the data from the edge detection signal output from the second part using the clock signal output from the third part.

    摘要翻译： 读出装置通过检测形成在具有不同磁化方向的磁光盘上形成的磁畴（D）的边缘的间隔，从磁光盘（10）读出预​​先记录的信息，其中磁性边缘的间隔 域对应于预先记录的信息的数据“1”或“0”。 读出装置包括用于通过扫描磁光盘的磁畴产生读出信号的第一部分（21-23），用于产生边缘检测信号的第二部分（24），该边缘检测信号具有上升和下降沿依赖 并且用于基于预定信息来校正边缘检测信号的边缘位置;第三部分（25），包括用于产生与上升和下降同步的时钟信号的锁相环电路 边缘检测信号的边缘;以及第四部分（26），用于使用从第三部分输出的时钟信号将数据与从第二部分输出的边缘检测信号分离。

    Data readout system for optical disk
    4.
    发明公开
    Data readout system for optical disk 失效
    Datenlesesystemfüroptische Platten。

    公开(公告)号：EP0652559A2

    公开(公告)日：1995-05-10

    申请号：EP94307006.0

    申请日：1994-09-26

    申请人： FUJITSU LIMITED

    发明人： Taguchi, Masakazu, c/o Fujitsu Limited ,  Izumi, Haruhiko, c/o Fujitsu Limited

    IPC分类号： G11B20/10 ,  G11B7/00

    CPC分类号： G11B20/10083 ,  G11B7/005 ,  G11B11/10515 ,  G11B20/10009 ,  G11B20/1258 ,  G11B2220/2537

    摘要： A system reproduces data from an optical disk (1) in which a signal obtained by encoding recording data in accordance with a recording rule including a rule corresponding to a partial response class I characteristic has been recorded. The system includes an optical head (2) for reproducing a signal from the optical disk, an analog-to-digital converter (13) for sampling the signal reproduced by the optical head (2) at predetermined timing and for outputting sampling data, a determination unit (51-55, 57) for determining, based on the sampling data from the analog-to-digital converter, a transition state of data to be reproduced in accordance with a transmission line characteristic of the reproduction system for the optical disk, and a data decision unit (56, 58-62) for deciding maximum likelihood reproduction data at present timing based on the determination result obtained by the determination unit.

    摘要翻译： 系统从光盘（1）再现数据，其中根据包括对应于部分响应等级I特性的规则的记录规则对记录数据进行编码而获得的信号已经被记录。 该系统包括用于再现来自光盘的信号的光头（2），用于在预定定时对由光头（2）再现的信号进行采样并用于输出采样数据的模拟 - 数字转换器（13） 确定单元（51-55,57），用于基于来自模数转换器的采样数据，根据用于光盘的再现系统的传输线特性来确定要再现的数据的转变状态， 以及数据判定单元（56,58-62），用于基于由确定单元获得的确定结果来确定当前定时的最大似然重放数据。

    Clock adjustment apparatus for a data reproduction system and an apparatus having a data reproduction system including such a clock adjustment apparatus
    9.
    发明公开
    Clock adjustment apparatus for a data reproduction system and an apparatus having a data reproduction system including such a clock adjustment apparatus 有权
    包括用于数据再现系统和装置与数据再现系统，这样的时钟调整装置时钟调整装置

    公开(公告)号：EP1111606A1

    公开(公告)日：2001-06-27

    申请号：EP00119180.8

    申请日：2000-09-05

    申请人： FUJITSU LIMITED

    发明人： Hamada, Kenichi, c/o Fujitsu Limited ,  Furuta, Satoshi, c/o Fujitsu Limited ,  Taguchi, Masakazu, c/o Fujitsu Limited

    IPC分类号： G11B20/10

    CPC分类号： G11B20/10

    摘要： A clock adjustment apparatus for adjusting a phase of a clock signal based on a phase error thereof is provided in a data reproduction system which samples a readout signal from a recording medium in synchronism with the clock signal, and reproduces data in accordance with a Viterbi algorithm by using sampled values of the readout signal. The recording medium is recorded with the data modulated in accordance with a recording rule of a predetermined partial response characteristic. The clock adjustment apparatus includes a phase error calculation circuit which calculates the phase error of the clock signal based on the sampled values of the readout signal.

    摘要翻译： 用于调整时钟信号的基于其是在数据再现系统，其样品从与时钟信号同步的记录介质的读出信号提供的相位误差的相位的时钟调整装置，并再现雅舞蹈数据用维特比算法 通过使用读出信号的采样值。 该记录介质记录有在雅舞蹈调制与预定部分响应特性的记录规则的数据。 时钟调整装置包括：一个相位误差计算电路，其计算基于所述读出信号的采样值的时钟信号的相位误差。