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43 条记录 (耗时 0.059 秒)

    Signal decoding apparatus and method
    35.
    发明授权
    Signal decoding apparatus and method 失效
    信号解码装置及方法

    公开(公告)号：US5070492A

    公开(公告)日：1991-12-03

    申请号：US317197

    申请日：1989-02-28

    申请人： Masaharu Ogawa ,  Yoshiki Nakajima ,  Osamu Ito ,  Teruo Furukawa ,  Kyosuke Yoshimoto ,  Kunimaro Tanaka ,  Masafumi Ototake ,  Minoru Ozaki

    发明人： Masaharu Ogawa ,  Yoshiki Nakajima ,  Osamu Ito ,  Teruo Furukawa ,  Kyosuke Yoshimoto ,  Kunimaro Tanaka ,  Masafumi Ototake ,  Minoru Ozaki

    IPC分类号： G11B7/005 ,  G11B7/007 ,  G11B7/085 ,  G11B11/105 ,  G11B20/10 ,  G11B20/12 ,  G11B20/14 ,  G11B27/30

    CPC分类号： G11B20/10222 ,  G11B11/10565 ,  G11B20/10009 ,  G11B20/1217 ,  G11B20/1403 ,  G11B27/3027 ,  G11B7/005 ,  G11B7/00745 ,  G11B7/08505 ,  G11B7/08541 ,  G11B2220/20

    摘要： The present invention relates to apparatus and method for decoding a signal reproduced from an optical disc. The optical disc has a signal format for recording data from an original signal in a data area at the optical disc. The optical disc also has recorded thereon a clock signal having the same phase as the recorded data. During reproduction of the recorded signal from the optical disc, this clock signal is utilized to generate a delayed version of the reproduced data signal. This delayed signal is used to decode the reproduced data signal obtained from the optical disc, thereby enabling a phase shift of the reproduced clock signal to there produced data signal to be eliminated by circuit processing. During the recording on the data area of the optical disc, fixing data for setting phases of data reproducing recording clock and reproducing signal to optimum phases for decoding is recorded. A phase corrector is provided at the optical disc driving apparatus so as to delay the fixing data signal reproduced from the optical disc, whereby a phase shift between the reproduced data signal and the reproduced clock signal can be corrected to an optimum quantity and the data signal at a preformatted area of the optical disc can be reproduced without delay.

    摘要翻译： 本发明涉及对从光盘再现的信号进行解码的装置和方法。 光盘具有用于在光盘的数据区中记录来自原始信号的数据的信号格式。 光盘上也记录了与记录数据相同相位的时钟信号。 在从光盘再现记录的信号期间，该时钟信号用于产生再现数据信号的延迟版本。 该延迟信号用于对从光盘获得的再现数据信号进行解码，从而能够通过电路处理来消除再现的时钟信号到那里产生的数据信号。 在光盘的数据区域的记录期间，记录用于将数据再现记录时钟和再现信号的相位设置到用于解码的最佳相位的固定数据。 在光盘驱动装置上设置相位校正器，以延迟从光盘再现的固定数据信号，从而可以将再现的数据信号和再生的时钟信号之间的相移校正到最佳量，并且数据信号 可以无延迟地再现光盘的预格式化区域。

    Pit spacing in the servo field of an optical disk for speed and direction detection and data retrieval
    36.
    发明授权
    Pit spacing in the servo field of an optical disk for speed and direction detection and data retrieval 失效
    光盘伺服场中的坑间距用于速度和方向检测和数据检索

    公开(公告)号：US5321675A

    公开(公告)日：1994-06-14

    申请号：US318594

    申请日：1989-02-28

    申请人： Osamu Ito ,  Masaharu Ogawa ,  Kyosuke Yoshimoto ,  Kunimaro Tanaka ,  Teruo Furukawa ,  Masafumi Ototake

    发明人： Osamu Ito ,  Masaharu Ogawa ,  Kyosuke Yoshimoto ,  Kunimaro Tanaka ,  Teruo Furukawa ,  Masafumi Ototake

    IPC分类号： G11B7/007 ,  G11B7/085 ,  G11B7/09

    CPC分类号： G11B7/00745 ,  G11B7/08529 ,  G11B7/0938

    摘要： A sampled servo type optical disc and its driving apparatus is disclosed, in which by cyclically repeating wobbled pits or address pits of the optical disc composed by two significant digits at every N tracks, and preformatting by patterns spaced in different intervals at every track, when the optical disc driving apparatus seeks an object track, the seek direction of the optical head can be detected by the sequence of change of the pattern, and its seek speed can be detected at high speed by the detected result of the pattern, ensuring the speed control of the optical head in response to the detected seek direction and speed.

    摘要翻译： 公开了一种采样的伺服型光盘及其驱动装置，其中通过循环重复由每个N个磁道由两个有效数字组成的光盘的波形凹坑或地址坑，并且通过在每个轨道上以不同间隔隔开的图案预格式化， 光盘驱动装置寻找物体轨道，可以通过图案变化的顺序来检测光学头的寻道方向，并且可以通过检测到的图案的结果高速检测其寻道速度，确保速度 响应于检测到的寻道方向和速度来控制光头。

    Apparatus for reading a magneto-optical disk
    38.
    发明授权
    Apparatus for reading a magneto-optical disk 失效
    用于读取磁光盘的装置

    公开(公告)号：US5003525A

    公开(公告)日：1991-03-26

    申请号：US209552

    申请日：1988-06-21

    申请人： Masayoshi Shimamoto ,  Kazuhiko Nakane ,  Teruo Furukawa

    发明人： Masayoshi Shimamoto ,  Kazuhiko Nakane ,  Teruo Furukawa

    IPC分类号： G11B7/09 ,  G11B7/005 ,  G11B7/13 ,  G11B11/10 ,  G11B11/105 ,  G11B13/04 ,  G11B27/24

    CPC分类号： G11B7/005 ,  G11B11/10536 ,  G11B11/10597 ,  G11B13/04 ,  G11B27/24 ,  G11B7/13

    摘要： A recording medium drive apparatus has a first detector for detecting tracking information and a second detector for detecting focusing information when magnetization information and pit information recorded on an optical disc are reproduced and detected. This apparatus also comprises a preamplifier having the function of selecting by a control signal either a mode for adding and amplifying output signals of the first and second detectors by utilizing a predetermined gain or a mode for subtracting and amplifying those output signals by utilizing another predetermined gain, of unconditionally selecting the polarities of the added and subtracted amplification signals by means of the control signal, and of selectively outputting signals V.sub.i (i=1, 2, 3, 4).

    摘要翻译： 记录介质驱动装置具有用于检测跟踪信息的第一检测器和用于在再现和检测记录在光盘上的磁化信息和凹坑信息时检测聚焦信息的第二检测器。 该装置还包括具有通过控制信号选择用于通过利用预定增益来添加和放大第一和第二检测器的输出信号的模式的功能的前置放大器，或者通过利用另外的预定增益来减法和放大那些输出信号的模式 ，通过控制信号无条件地选择加法和减法的放大信号的极性，并选择性地输出信号Vi（i = 1,2,3,4）。

    Digital data reproducing apparatus
    39.
    发明授权
    Digital data reproducing apparatus 失效
    数字数据再现装置

    公开(公告)号：US5278815A

    公开(公告)日：1994-01-11

    申请号：US765129

    申请日：1991-09-25

    申请人： Akira Mashimo ,  Mitsumasa Kubo ,  Fumio Hishiyama ,  Masayoshi Shimamoto ,  Teruo Furukawa

    发明人： Akira Mashimo ,  Mitsumasa Kubo ,  Fumio Hishiyama ,  Masayoshi Shimamoto ,  Teruo Furukawa

    IPC分类号： G11B7/007 ,  G11B20/14 ,  G11B5/09

    CPC分类号： G11B7/00745 ,  G11B20/1403

    摘要： This digital data reproducing apparatus is adapted to prevent reproduction errors of data, wherein a read gate opened when a fixed pattern in a header field for phase locking is detected is kept opened until the data reproduction in a data field is completed, whereby the phase locking in the data field is performed still in the same low-speed mode as when the PLL pull-in is completed in the header field, with the responding ability lowered to defects such as voids or the like in the phase locking pattern area in the data field.This digital data reproducing apparatus is adapted to prevent reproduction errors, wherein, when a reproduced data in a data field is locked, a read gate is opened after a fixed pattern recorded for phase locking is surely detected, so that the phase locking is started in a high-speed mode, while avoiding erroneous operations of the PLL.

    摘要翻译： 该数字数据再现装置适用于防止检测到用于相位锁定的标题字段中的固定图案时读取门打开的数据的再现错误，直到数据字段中的数据再现完成为止， 数据字段仍然处于与报头字段中PLL拉入完成相同的低速模式，响应能力降低到数据中相位锁定模式区域中的诸如空白等的缺陷 领域。 该数字数据再现装置适于防止再现错误，其中当数据字段中的再现数据被锁定时，在可靠地检测到记录为相位锁定的固定图案之后，读门被打开，从而开始相位锁定 高速模式，同时避免PLL的错误操作。

    Binary data encoding and decoding process
    40.
    发明授权
    Binary data encoding and decoding process 失效
    二进制数据编解码过程

    公开(公告)号：US4672362A

    公开(公告)日：1987-06-09

    申请号：US851081

    申请日：1986-04-14

    申请人： Teruo Furukawa ,  Minoru Ozaki

    发明人： Teruo Furukawa ,  Minoru Ozaki

    IPC分类号： G11B20/14 ,  H03M5/12 ,  H03M5/14 ,  H03M7/14 ,  H03M13/00 ,  H03M7/00

    CPC分类号： H03M5/145

    摘要： A binary data encoding process comprises the steps of separating a given binary data sequence at every two bits by a serial/parallel shift register (18), and converting the separated 2-bit data into a 3-bit code by using a logic circuit (19) and a parallel/serial shift register (20). A conversion pattern in the logic circuit (19) is exclusively determined based on the 2-bit data to be converted, 1-bit data immediately before and 2-bit data immediately after said 2-bit data, and a 3-bit code converted immediately before the conversion of said 2-bit data, wherein a succession of at least one but no more than seven "0" exists between an arbitrary "1" and the succeeding "1" in the converted 3-bit code sequence.

    摘要翻译： 二进制数据编码处理包括以下步骤：通过串行/并行移位寄存器（18）将每两位给定的二进制数据序列分离，并通过使用逻辑电路（2）将分离的2位数据转换为3位代码 19）和并行/串行移位寄存器（20）。 逻辑电路（19）中的转换模式仅基于要转换的2位数据，紧接在之前的1位数据和紧接在2位数据之后的2位数据和3位代码转换 在所述2位数据的转换之前，其中在转换的3位代码序列中的任意“1”和后一“1”之间存在至少一个但不超过七个“0”的连续。