利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

136 条记录 (耗时 0.032 秒)

    Code error detecting and correcting apparatus
    1.
    发明授权
    Code error detecting and correcting apparatus 失效
    代码错误检测和校正装置

    公开(公告)号：US4866717A

    公开(公告)日：1989-09-12

    申请号：US77608

    申请日：1987-07-24

    申请人： Katsumi Murai ,  Makoto Usui ,  Isao Satoh

    发明人： Katsumi Murai ,  Makoto Usui ,  Isao Satoh

    IPC分类号： G11B20/18 ,  H03M13/15

    CPC分类号： G11B20/1866 ,  H03M13/15

    摘要： An error detecting and correcting apparatus to detect and correct errors in code words to be subjected to a digital recording and reproducing operations by use of a recording medium. The apparatus is characterized by an interface method with respect to the host computer which generates digital information to be written on a recording medium or which utilizes the digital information read from the recording medium. The host computer supplies address data to a buffer memory circuit controlled by the error detecting and correcting apparatus through an address bus and a data bus connected between the host computer and the error detecting and correcting apparatus, thereby effecting input/output operations of digital data, namely, information codes. To this end, according to the apparatus of the present invention, only the information symbols necessary on the host computer side are allocated to a consecutive space of the buffer memory and the control codes and check symbols are controlled and are stored such that the information symbols are located in particular addresses of the buffer memory space.

    摘要翻译： 一种错误检测和校正装置，用于检测和校正通过使用记录介质进行数字记录和再现操作的码字中的错误。 该装置的特征在于，相对于主计算机的接口方法，其生成要写入记录介质的数字信息或利用从记录介质读取的数字信息。 主计算机通过地址总线和连接在主计算机与错误检测和校正装置之间的数据总线将地址数据提供给由错误检测和校正装置控制的缓冲存储器电路，从而实现数字数据的输入/输出操作， 即信息码。 为此，根据本发明的装置，只有主计算机侧所需的信息符号被分配给缓冲存储器的连续空间，并且控制代码和校验符号被存储，使得信息符号 位于缓冲存储器空间的特定地址中。

    Optical disk and optical disk apparatus with error correction
    2.
    发明授权
    Optical disk and optical disk apparatus with error correction 失效
    具有误差校正的光盘和光盘设备

    公开(公告)号：US4821253A

    公开(公告)日：1989-04-11

    申请号：US132279

    申请日：1987-12-14

    申请人： Makoto Usui ,  Katsumi Murai ,  Isao Satoh

    发明人： Makoto Usui ,  Katsumi Murai ,  Isao Satoh

    IPC分类号： G11B20/14 ,  G11B20/18 ,  G11B7/00

    CPC分类号： G11B20/1883 ,  G11B20/1426 ,  G11B20/1833 ,  G11B2220/20

    摘要： This invention relates to an optical disk, in which part of the sectors are reproduction-only sectors and remaining sectors are recording-reproduction sectors. Data and first error correcting codes for the data are recorded in advance in the reproduction-only sectors, and second error correcting codes for data over a plurality of reproduction-only sectors are recorded in advance in other reproduction-only sectors. At data reproduction, only sectors which are unrecoverable by the first error correction codes undergo error correction by the second error correcting codes, and the corrected data with the first error correcting codes being appended are recorded in the recording-reproduction sectors. Later on, when data in sectors unrecoverable by the first error correcting codes are needed, the above-mentioned recorded sectors are read out. Data storage about twice the capacity of the data recording areas is made possible by adopting the PWM (pulse width modulation) recording for the data reproduction-only area and the PPM (pulse position modulation) recording for the recording-reproduction area.

    Data block deinterleaving and error correction system
    3.
    发明授权
    Data block deinterleaving and error correction system 失效
    数据块去交错和纠错系统

    公开(公告)号：US5051998A

    公开(公告)日：1991-09-24

    申请号：US372585

    申请日：1989-06-28

    申请人： Katsumi Murai ,  Yuzuru Kuroki ,  Isao Satoh

    发明人： Katsumi Murai ,  Yuzuru Kuroki ,  Isao Satoh

    IPC分类号： G11B20/10 ,  G11B20/18

    CPC分类号： G11B20/1809

    摘要： A deinterleaving and error correction system which is advantageously utilized in a playback system of an optical recording disk apparatus. As each block of sector data, encoded for example with the Reed-Solomon error correction code with block interleaving, is read from the disk, the positions within the data block at which drop-out of the playback signal occurs are respectively stored in a memory in which the data symbols are also stored, with these drop-out positions being stored as error position data. Error correction processing is executed using the error position data in conjunction with the code words, enabling the maximum number of correctable errors for each sector to be substantially increased using a simple system configuration.

    摘要翻译： 一种解交织和纠错系统，其有利地用于光记录盘装置的回放系统中。 由于从盘读取例如利用具有块交织的里德 - 所罗门纠错码进行编码的每个扇区数据块，所以发生重放信号丢失的数据块内的位置分别存储在存储器 其中还存储数据符号，其中这些丢弃位置被存储为错误位置数据。 使用错误位置数据与代码字一起执行错误校正处理，使得能够使用简单的系统配置大幅增加每个扇区的最大数量的可校正错误。

    Data reproducing apparatus
    5.
    发明授权
    Data reproducing apparatus 失效
    数据再现装置

    公开(公告)号：US5216677A

    公开(公告)日：1993-06-01

    申请号：US585409

    申请日：1990-09-20

    申请人： Yuji Takagi ,  Isao Satoh ,  Yoshihisa Fukushima ,  Katsumi Murai

    发明人： Yuji Takagi ,  Isao Satoh ,  Yoshihisa Fukushima ,  Katsumi Murai

    IPC分类号： G11B20/18 ,  H03M13/31

    CPC分类号： H03M13/31 ,  G11B20/1833

    摘要： A data reproducing system is provided wherein data stored in an optical disk can be read and, in accordance with a coded error detection and correction code, can have an error pointer defined in synchronization with a modulated data of one symbol. This information can be transmitted, through a time division multiplexing circuit, at a faster clock speed than a demodulating clock with which the timing of a data demodulating will be controlled.

    摘要翻译： 提供了一种数据再现系统，其中可以读取存储在光盘中的数据，并且根据编码的错误检测和校正码可以具有与一个符号的调制数据同步地定义的错误指针。 该信息可以通过时分多路复用电路以比解调时钟更快的时钟速度被发送，解调时钟将与数据解调的定时一起被控制。