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    Reproduction method and apparatus
    5.
    发明公开
    Reproduction method and apparatus 有权
    Wiedergabeverfahren und Vorrichtung

    公开(公告)号：EP1315154A2

    公开(公告)日：2003-05-28

    申请号：EP02025920.6

    申请日：2002-11-20

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Minamino, Junichi ,  Nakao, Masahito ,  Furumiya, Shigeru ,  Ishibashi, Hiromichi

    IPC分类号： G11B7/005

    CPC分类号： G11B20/1403 ,  G11B7/0053 ,  G11B7/24082

    摘要： At the time of heterodyne detection, information (e.g. address information) is reproduced constantly in the optimum condition. A method reproduces information recording medium including a reference wobble block (102) which has a first wobble pattern representing a first information content; and an information wobble block (104) which follows the reference wobble block and which has at least one of the first wobble pattern and a second wobble pattern representing a second information and different from the first wobble pattern. The method includes reading the reference wobble block and the information wobble block; comparing a wobble pattern read from the information wobble block with the first wobble pattern of the reference wobble block; judging that information recorded in the information wobble block is the first information or the second information according to the wobble pattern read from the information wobble block; and outputting one of the first and the second information based on the judging result.

    摘要翻译： 在外差检测时，信息（例如地址信息）在最佳条件下被不断地再现。 一种方法再现包括具有代表第一信息内容的第一摆动模式的参考摆动块（102）的信息记录介质; 以及跟随参考摆动块并且具有表示第二信息并且不同于第一摆动模式的第一摆动模式和第二摆动模式中的至少一个的信息摆动块（104）。 该方法包括读取参考摆动块和信息摆动块; 将从信息摆动块读取的摆动模式与参考摆动块的第一摆动模式进行比较; 根据从信息摆动块读取的摆动模式判定记录在信息摆动块中的信息是第一信息或第二信息; 并基于判断结果输出第一和第二信息之一。

    Disc reading method and disc reading apparatus
    10.
    发明公开
    Disc reading method and disc reading apparatus 失效
    Verfahren und Vorrichtung zum Lesen einer Platte。

    公开(公告)号：EP0601894A1

    公开(公告)日：1994-06-15

    申请号：EP93310033.1

    申请日：1993-12-13

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Furumiya, Shigeru ,  Takemura, Yoshinari

    IPC分类号： G11B20/10 ,  G11B20/12 ,  G11B7/14

    CPC分类号： G11B20/1258 ,  G11B20/10

    摘要： A disc reproducing apparatus for reproducing data stored on plural disc surfaces at a constant linear density comprises: plural heads for reproducing the data on the plural disc surfaces at the same time respectively; a controller for controlling positions of the heads such that a total data rate of data reproduced form the plural heads is constant, each of the disc surfaces being divided into N circumference zones; N signal processing circuits, having N processing speeds corresponding to N data rates corresponding to the N circumference zones, for processing the reproduced data respectively; a switch for supplying the reproduced data to the N signal processing circuits such that data reproduced by each of the plural heads is supplied to either of the N signal processing circuits suitable for the data rate of the supplied data thereto; and a combining circuit for combining the processed data signals from the N signal processing circuits into a combined serial data signal of which data rate corresponds to the total of data rates. A disc reproducing method of reproducing data stored on a plurality of disc surfaces at a constant linear density using N signal processing circuits and the switch is also disclosed.

    摘要翻译： 用于以恒定线密度再现存储在多个盘表面上的数据的盘再现装置包括：分别同时再现多个盘表面上的数据的多个头; 控制器，用于控制头的位置，使得从多个头重放的数据的总数据速率是恒定的，每个盘表面被划分成N个周边区域; N个信号处理电路，具有对应于N个周边区域的N个数据速率的N个处理速度，分别用于处理再现数据; 用于将再现数据提供给N个信号处理电路的开关，使得由多个磁头中的每一个再现的数据被提供给适合于所提供数据的数据速率的N个信号处理电路中的任一个; 以及组合电路，用于将来自N个信号处理电路的经处理的数据信号组合成数据速率对应于数据速率总和的组合串行数据信号。 还公开了一种使用N个信号处理电路和开关以恒定的线密度再现存储在多个盘表面上的数据的盘再现方法。