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    Signal processing system and information storage medium
    2.
    发明公开
    Signal processing system and information storage medium 有权
    Signalverarbeitungssystem

    公开(公告)号：EP2192586A1

    公开(公告)日：2010-06-02

    申请号：EP09172770.1

    申请日：2009-10-12

    申请人： Kabushiki Kaisha Toshiba

    发明人： Nagai, Yuji ,  Noda, Chosaku ,  Watabe, Kazuo ,  Ogawa, Akihito ,  Kuroda, Kazuto ,  Yoshida, Nobuhisa ,  Naito, Nobumasa ,  Morishita, Naoki ,  Nakamura, Naomasa ,  Ohsawa, Hideaki ,  Sato, Hiroharu ,  Yamada, Hisashi ,  Kaneshige, Toshihiko

    IPC分类号： G11B20/00 ,  G11B20/14 ,  G11B20/24 ,  H03M1/08 ,  H03M5/04 ,  H04L27/32

    CPC分类号： G11B20/14 ,  G11B20/0021 ,  G11B20/00579 ,  G11B20/00884 ,  G11B20/1426 ,  G11B2020/1457

    摘要： According to one embodiment, a first encoder (12) encodes main information, a second encoder (22) encodes sub-information, a first modulator (62) modulates a carrier based on an output of the first encoder, a duplicating module (104) duplicates an output of the second encoder to generate encoded sub-information units, and a second modulator (64) amplitude-modulates an output of the first modulator based on the encoded sub-information units. The second modulator (64) amplitude-modulates with σ/(µ×(2 N ) 1/2 ) being 0.4 or less, wherein a noise power of a transmission path or a storage medium is σ 2 , a number of the encoded sub-information units is N, signal levels after amplitude modulation, which correspond to bit 1 and bit 0 of the encoded sub-information units, are A and B, and a level difference A - B is µ.

    摘要翻译： 根据一个实施例，第一编码器（12）对主信息进行编码，第二编码器（22）编码子信息，第一调制器（62）基于第一编码器的输出调制载波，复制模块（104） 复制第二编码器的输出以生成编码的子信息单元，并且第二调制器（64）基于编码的子信息单元对第一调制器的输出进行幅度调制。 第二调制器（64）用×（μ×（2N）1/2）进行幅度调制，为0.4或更小，其中传输路径或存储介质的噪声功率为2，编码子数 信息单位为N，对应于编码子信息单元的位1和位0的振幅调制后的信号电平为A和B，电平差A-B为μ。

    Optical disk apparatus and photodetection signal processing method
    3.
    发明公开
    Optical disk apparatus and photodetection signal processing method 审中-公开
    OptischesPlattengerätund Photodetektionssignalverarbeitungsverfahren

    公开(公告)号：EP1643496A2

    公开(公告)日：2006-04-05

    申请号：EP05108535.5

    申请日：2005-09-16

    申请人： KABUSHIKI KAISHA TOSHIBA

    发明人： Kuroda, Kazuto ,  Higashiyama, Yasushi ,  Sato, Hiroharu

    IPC分类号： G11B7/09

    CPC分类号： G11B7/005 ,  G11B7/0906 ,  G11B7/0941 ,  G11B20/22

    摘要： An optical disk apparatus of the invention includes an optical pickup (110) which irradiates an optical disk with a laser beam, a light-reception unit including a first light-reception element and a second light-reception element, the light-reception unit receiving the laser beam reflected from the optical disk to provide a first photodetection signal and a second photodetection signal corresponding to the reflected laser beam, measuring units (400, 500) which receive the first and second photodetection signals from the optical pickup to measure propagation delay time difference between the first and second photodetection signals, a delay unit (600) which delays the first and second photodetection signals based on the signal propagation delay time difference such that delay times of the first and second photodetection signals are equalized to each other, and a signal processing circuit (114) which processes the first and second photodetection signals delayed by the delay unit, and provides the processed signals.

    摘要翻译： 本发明的光盘装置包括用激光束照射光盘的光学拾取器（110），包括第一光接收元件和第二光接收元件的光接收单元，光接收单元接收 从光盘反射的激光束提供与反射激光束相对应的第一光电检测信号和第二光电检测信号，测量单元（400,500），其从光学拾取器接收第一和第二光电检测信号以测量传播延迟时间 第一和第二光电检测信号之间的差异;延迟单元（600），其基于所述信号传播延迟时间差延迟所述第一和第二光电检测信号，使得所述第一和第二光电检测信号的延迟时间彼此相等;以及 信号处理电路（114），处理由延迟单元延迟的第一和第二光电检测信号， 处理的信号。

    Optical disk apparatus and photodetection signal processing method
    4.
    发明公开
    Optical disk apparatus and photodetection signal processing method 审中-公开
    光盘装置和光检测信号处理方法

    公开(公告)号：EP1643496A3

    公开(公告)日：2007-08-15

    申请号：EP05108535.5

    申请日：2005-09-16

    申请人： KABUSHIKI KAISHA TOSHIBA

    发明人： Kuroda, Kazuto ,  Higashiyama, Yasushi ,  Sato, Hiroharu

    IPC分类号： G11B7/09 ,  G11B7/005

    CPC分类号： G11B7/005 ,  G11B7/0906 ,  G11B7/0941 ,  G11B20/22

    摘要： An optical disk apparatus of the invention includes an optical pickup (110) which irradiates an optical disk with a laser beam, a light-reception unit including a first light-reception element and a second light-reception element, the light-reception unit receiving the laser beam reflected from the optical disk to provide a first photodetection signal and a second photodetection signal corresponding to the reflected laser beam, measuring units (400, 500) which receive the first and second photodetection signals from the optical pickup to measure propagation delay time difference between the first and second photodetection signals, a delay unit (600) which delays the first and second photodetection signals based on the signal propagation delay time difference such that delay times of the first and second photodetection signals are equalized to each other, and a signal processing circuit (114) which processes the first and second photodetection signals delayed by the delay unit, and provides the processed signals.