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111 条记录 (耗时 0.082 秒)

    Optical information recording apparatus for stable recording
    61.
    发明授权
    Optical information recording apparatus for stable recording 有权
    用于稳定记录的光信息记录装置

    公开(公告)号：US07113473B2

    公开(公告)日：2006-09-26

    申请号：US11046777

    申请日：2005-02-01

    申请人： Toyoji Gushima ,  Makoto Usui ,  Kenji Koishi ,  Yuuichi Kamioka

    发明人： Toyoji Gushima ,  Makoto Usui ,  Kenji Koishi ,  Yuuichi Kamioka

    IPC分类号： G11B7/00

    CPC分类号： G11B7/126 ,  G11B7/0045 ,  G11B7/0901

    摘要： In an apparatus for recording information to an optical recording medium, a laser beam is irradiated to and reflected from the medium. A photodetector detects the light quantity of the irradiated or reflected light beam, and the detected laser beam is subjected to signal processing. Then, a sampler samples the laser beam at the timing of a sampling pulse which is supplied from a sampling pulse generator. Then, a controller controls the laser power according to the sampled laser beam. A pulse timing setting unit sets and adjusts the timing of the sampling pulse by taking into account the response time in the propagation path of the laser beam from the start of the irradiation to the sampling. Thus, the laser power can be monitored correctly, and the laser power can be optimized so as to stably and reliably reproduce an address signal and to generate a servo signal while data is being recorded.

    摘要翻译： 在用于将信息记录到光学记录介质的装置中，激光束被照射并从介质反射。 光检测器检测照射或反射光束的光量，并且检测的激光束进行信号处理。 然后，采样器在从采样脉冲发生器提供的采样脉冲的定时采样激光束。 然后，控制器根据采样的激光束控制激光功率。 脉冲定时设定单元通过考虑激光束从照射开始到采样的传播路径中的响应时间来设定和调整采样脉冲的定时。 因此，可以正确地监视激光功率，并且可以优化激光功率，以便稳定可靠地再现地址信号，并在数据被记录时产生伺服信号。

    Data converter and method thereof
    64.
    发明申请
    Data converter and method thereof 有权
    数据转换器及其方法

    公开(公告)号：US20050089161A1

    公开(公告)日：2005-04-28

    申请号：US10952746

    申请日：2004-09-30

    申请人： Kaoru Yokota ,  Motoji Ohmori ,  Masato Yamamichi ,  Masami Yamamichi ,  Makoto Tatebayashi ,  Makoto Usui

    发明人： Kaoru Yokota ,  Motoji Ohmori ,  Masato Yamamichi ,  Masami Yamamichi ,  Makoto Tatebayashi ,  Makoto Usui

    IPC分类号： G06F7/72 ,  H04L9/32 ,  H04L9/00 ,  G06F7/00

    CPC分类号： G06F7/724 ,  G06F2207/7209 ,  H04L9/0625 ,  H04L9/3271 ,  H04L2209/34 ,  H04L2209/60

    摘要： A data converter (1) capable of reducing a size of the total implementation in a device is a processing apparatus that performs secret converting processing predetermined to input data with 64 bits, the data converter including a finite field polynomial cubing unit (10), data integrating units (11a) to (11d), (12) and (13), a first converter (14), a second converter (15), a data splitting unit (16), and a data integrating unit (17). The finite field polynomial cubing unit (10) performs cubing, on the 32 bits data, in the polynomial residue class ring with a value in the finite field GF (28) as a coefficient and respectively outputs data with 32 bits.

    摘要翻译： 能够减少设备总体实现规模的数据转换器（1）是一种处理装置，其执行预定的64位输入数据的秘密转换处理，数据转换器包括有限域多项式立方单元（10），数据 积分单元（11a）至（11d），（12）和（13），第一转换器（14），第二转换器（15），数据分割单元（16）和数据积分单元（17） 。 有限域多项式立方单元（10）在具有有限域GF（2 8）中的值的多项式残差类环中的32位数据上执行立方，并分别输出数据 32位。

    Galois field arithmetic logic unit
    67.
    发明授权
    Galois field arithmetic logic unit 失效
    伽罗瓦域算术逻辑单元

    公开(公告)号：US4875211A

    公开(公告)日：1989-10-17

    申请号：US130159

    申请日：1987-12-08

    申请人： Katsumi Murai ,  Makoto Usui

    发明人： Katsumi Murai ,  Makoto Usui

    IPC分类号： G06F7/72 ,  H03M13/15

    CPC分类号： H03M13/151 ,  G06F7/724

    摘要： The present invention relates to a Galois field arithmetic logic unit of a code error check/correct apparatus to be employed when recording/reproducing data on an optical disk. The arithmetic logic unit uses a combination including a parallel multiplication circuitry of a primitive element .alpha. of a Galois field, an EX-OR addition circuitry for the multiplication resuts, a 0 element decision circuitry for the results of the addition, the registers to which the multiplication results are fed back so as to accomplish a parallel computation of a polynomial, thereby enabling a root and an error value of an error location equation to be obtained at a high speed. The arithmetic logic unit develops a remarkable reduction of the amount of computation particularly when the code system has a great code length and the degree of the error location polynomial associated with the long distance code is as high as d=17.

    摘要翻译： 本发明涉及在光盘上记录/再现数据时采用的代码错误校验/校正装置的伽罗瓦域算术逻辑单元。 算术逻辑单元使用包括伽罗瓦域的原始元素α的并行乘法电路，用于乘法复位的EX-OR加法电路的组合，用于加法结果的0元件判定电路， 反馈乘法结果，以实现多项式的并行计算，从而能够高速获得误差位置方程的根和误差值。 算术逻辑单元显着地减少计算量，特别是当代码系统具有很好的代码长度，并且与长距离代码相关联的错误位置多项式的程度高达d = 17时。

    Optical disk reproduction apparatus, optical disk reproduction method, reproduction processing device and reproduction processing method
    70.
    发明授权
    Optical disk reproduction apparatus, optical disk reproduction method, reproduction processing device and reproduction processing method 失效
    光盘再现装置，光盘再现方法，再现处理装置和再现处理方法

    公开(公告)号：US08250415B2

    公开(公告)日：2012-08-21

    申请号：US13055843

    申请日：2010-05-18

    申请人： Masaru Yamaoka ,  Yuji Takagi ,  Makoto Usui

    发明人： Masaru Yamaoka ,  Yuji Takagi ,  Makoto Usui

    IPC分类号： G11C29/00

    CPC分类号： G11B20/18 ,  G11B20/00376 ,  G11B20/00398 ,  G11B20/00405 ,  G11B20/10342 ,  G11B20/10453 ,  G11B20/10462 ,  G11B20/10472 ,  G11B20/14 ,  G11B20/1833 ,  G11B2220/2562

    摘要： Provided is an optical disk reproduction apparatus capable of preventing information that is different from the original sub information from being subjected to error correction erroneously, and of stably reproducing the sub information. The optical disk reproduction apparatus (1) has an optical head (301) for reading a reproduction signal including main information and sub information based on a recording mark formed on an optical disk (300), a main information extraction unit (4) for extracting the main information from the reproduction signal, and a sub information extraction unit (2) for extracting the sub information from the reproduction signal. The sub information extraction unit (2) determines a reproduction accuracy of the sub information, and includes an error correction control unit (308) for deciding a timing of performing error correction of the sub information according to the determined reproduction accuracy, and an error correction unit (309) for performing the error correction of the sub information according to the timing decided with the error correction control unit (308).

    摘要翻译： 提供了能够防止与原始子信息不同的信息被错误地进行错误纠正并且稳定地再现子信息的光盘再现装置。 光盘再现装置（1）具有用于读取包含基于形成在光盘（300）上的记录标记的主信息和子信息的再现信号的光头（301），用于提取的主信息提取单元 来自再现信号的主要信息，以及用于从再现信号中提取子信息的子信息提取单元（2）。 子信息提取单元（2）确定子信息的再现精度，并且包括用于根据确定的再现精度来确定执行子信息的纠错的定时的纠错控制单元（308） 单元（309），用于根据由纠错控制单元（308）确定的定时执行子信息的纠错。