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111 条记录 (耗时 0.031 秒)

    Frame number detection for signals produced from optical disk
    91.
    发明授权
    Frame number detection for signals produced from optical disk 有权
    从光盘产生的信号的帧号检测

    公开(公告)号：US06236631B1

    公开(公告)日：2001-05-22

    申请号：US09205288

    申请日：1998-12-04

    申请人： Hironori Deguchi ,  Makoto Usui

    发明人： Hironori Deguchi ,  Makoto Usui

    IPC分类号： G11B390

    CPC分类号： G11B20/1217 ,  G11B27/3027 ,  G11B2020/1225 ,  G11B2020/1287 ,  G11B2220/213 ,  G11B2220/2562

    摘要： A frame number detector for detecting frame number receives input signals consisting of a plurality of sectors. A sector consists of a plurality of frames, a frame including synchronizing signals and data, the synchronizing signals having a pattern used to identify a frame number in a sector, the pattern being defined to identify a frame number from a pattern of the synchronizing signals in a frame or from patterns of the synchronizing signals in consecutive frames. A pattern of synchronizing signals is extracted for consecutive frames from input signals, and the extracted pattern is compared with a predetermined pattern to determine with majority principle whether the extracted pattern agrees with the predetermined pattern. Then, a frame number is determined based on an output signal of the comparison. In an example, a block consists of for example two frames of the extracted pattern of synchronizing signals, and the comparison is performed in the unit of block. Thus, the frame number is detected correctly even when synchronization patterns of data comprises synchronization patterns having short distances between codes.

    摘要翻译： 用于检测帧号的帧号码检测器接收由多个扇区组成的输入信号。 扇区由多个帧组成，包括同步信号和数据的帧，所述同步信号具有用于识别扇区中的帧号的模式，所述模式被定义为从帧中的同步信号的模式中识别帧号 帧或来自连续帧中的同步信号的模式。 从输入信号中提取用于连续帧的同步信号的模式，并将所提取的模式与预定模式进行比较，以确定所提取的模式是否与预定模式一致。 然后，基于比较的输出信号确定帧号。 在一个示例中，块由例如提取的同步信号的模式的两个帧组成，并且以块为单位执行比较。 因此，即使当数据的同步模式包括代码之间的短距离的同步模式时，帧号也被正确地检测到。

    Injection molding process for producing a box-shaped plastic housing
    92.
    发明授权
    Injection molding process for producing a box-shaped plastic housing 失效
    用于生产盒形塑料外壳的注塑工艺

    公开(公告)号：US5254304A

    公开(公告)日：1993-10-19

    申请号：US775561

    申请日：1991-10-15

    申请人： Katsura Adachi ,  Makoto Usui ,  Kota Nishii ,  Takashi Muraya ,  Toshihiro Kobayashi ,  Kazuyuki Tamura ,  Junichi Sato

    发明人： Katsura Adachi ,  Makoto Usui ,  Kota Nishii ,  Takashi Muraya ,  Toshihiro Kobayashi ,  Kazuyuki Tamura ,  Junichi Sato

    IPC分类号： B29C45/00 ,  B29C45/26 ,  B29C45/37 ,  B29L22/00 ,  H05K5/00

    CPC分类号： H05K5/0008 ,  B29C45/00 ,  B29C45/26

    摘要： An injection molding process for producing an integrally molded box-shaped plastic housing of a resin material. The housing includes integral portions of a bottom wall of a first thickness and an upright wall of a second thickness, the first thickness being in the range of from one-third to two-thirds of the second thickness and the bottom wall portion including at least one integral rib structure. A cavity is formed in a mold having cavity portions, respectively corresponding to the bottom and upright wall portions and the rib structure, in fluid communication. Fluid resin is injected through respective injection gates directly communicating with the rib structure cavity portion and the upright wall cavity portion, which provide passageways for flow of the liquid resin therethrough, thereby completely filling all cavity portions. Cavity portions corresponding to cylindrical bosses formed on the rib structures further are provided and knockout pins extend through the mold in alignment with the cylindrical bosses to release the secured housing from the mold. Porous knockout pins extend through the mold and communicate with bounded regions of the bottom wall cavity portion for selective release of gas therefrom, to assure complete filling thereof with liquid resin; the pins are actualable as ejector pins for releasing the cured housing from the mold.

    Optical disk and optical disk apparatus with error correction
    93.
    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.