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    Information record medium, and information record apparatus and method
    71.
    发明申请
    Information record medium, and information record apparatus and method 审中-公开
    信息记录介质，信息记录装置和方法

    公开(公告)号：US20050276212A1

    公开(公告)日：2005-12-15

    申请号：US11148433

    申请日：2005-06-09

    申请人： Masahiro Kato ,  Eiji Muramatsu ,  Kunihiko Horikawa ,  Shoji Taniguchi ,  Kazuo Kuroda

    发明人： Masahiro Kato ,  Eiji Muramatsu ,  Kunihiko Horikawa ,  Shoji Taniguchi ,  Kazuo Kuroda

    IPC分类号： G11B7/24 ,  G11B7/0045 ,  G11B7/007 ,  G11B7/125 ,  G11B7/244

    CPC分类号： G11B7/1267 ,  G11B7/00736 ,  G11B7/24038 ,  G11B7/24079

    摘要： An information record medium is provided with: a first record layer (107) for recording first information, and one or more second record layers (207) disposed on said first record layer, each second layer being for recording second information, each layer of said second layers has a predetermined area (PCA1-1) where a power calibration is performed to detect an optimum recording power of recording laser beam transmitted through the first record layer and another layer of the second layers, said another layer positioned closer to said first record layer than said each layer, and in opposite areas (TA) of said another layer and said first record layer, said opposite areas being opposite to said predetermined area of said each layer of said second layers, a first absolute amount of at least one of width and depth of a groove is increased and thereby light transmittance in said opposite areas is approached to (i) light transmittance under an assumption that the first absolute amount is not increased and said another layer and said first record layer are in a recorded state, in comparison to (ii) light transmittance under an assumption that the first absolute amount is not increased and said another layer and said first record layer are in a non-recorded state.

    摘要翻译： 信息记录介质设置有：用于记录第一信息的第一记录层（107）和设置在所述第一记录层上的一个或多个第二记录层（207），每个第二层用于记录第二信息，每层所述 第二层具有预定区域（PCA 1-1），其中执行功率校准以检测通过第一记录层传输的记录激光束和第二层的另一层的最佳记录功率，所述另一层位于更靠近所述第一层 记录层，并且在所述另一层和所述第一记录层的相对区域（TA）中，所述相对区域与所述第二层的每层的所述预定区域相对，第一绝对量的至少一个 增加凹槽的宽度和深度，从而在所述相对区域中的光透射率接近（i）透光率，假设第一绝对量 在不假定第一绝对量不增加且所述另一层和所述第一记录层为...的情况下，与（ii）透光率相比，t不增加，并且所述另一层和所述第一记录层处于记录状态 非记录状态。

    Rotation control apparatus operating with a sync signal having variable intervals
    72.
    再颁专利
    Rotation control apparatus operating with a sync signal having variable intervals 有权
    具有可变间隔的同步信号的旋转控制装置

    公开(公告)号：USRE41430E1

    公开(公告)日：2010-07-13

    申请号：US10617395

    申请日：2003-07-11

    申请人： Kazuo Kuroda ,  Masayoshi Yoshida ,  Toshio Suzuki

    发明人： Kazuo Kuroda ,  Masayoshi Yoshida ,  Toshio Suzuki

    IPC分类号： G11B27/30

    CPC分类号： G11B20/10009 ,  G11B7/0045 ,  G11B7/0053 ,  G11B19/247 ,  G11B19/28

    摘要： A rotation control apparatus which can maintain an accurate rotating state even in a high density optical disk (DVD) having a structure such that parts of the sync signal are recorded at an interval different from that of the other sync signal parts. The apparatus has: a unit period signal generator for generating a period signal of a unit period; a pre-pit detector for detecting a pre-pit from the DVD; a phase difference detector for detecting a phase difference between the detection timing of the pre-pit and the unit period signal; and a holding circuit for holding the phase difference detected. The rotation of the DVD is controlled on the basis of the phase difference held at the holding circuit.

    摘要翻译： 即使在具有如下结构的高密度光盘（DVD）中也能够保持精确旋转状态的旋转控制装置，即以与其它同步信号部分不同的间隔记录同步信号的部分。 该装置具有：单位周期信号发生器，用于产生单位周期的周期信号; 用于从DVD检测预凹坑的预坑检测器; 相位差检测器，用于检测预凹坑的检测定时与单位周期信号之间的相位差; 以及保持电路，用于保持检测到的相位差。 基于在保持电路上保持的相位差来控制DVD的旋转。

    Information reproducing apparatus and method
    78.
    发明授权
    Information reproducing apparatus and method 有权
    信息再生装置及方法

    公开(公告)号：US07301866B2

    公开(公告)日：2007-11-27

    申请号：US10852487

    申请日：2004-05-25

    申请人： Kazuo Kuroda ,  Toshio Suzuki

    发明人： Kazuo Kuroda ,  Toshio Suzuki

    IPC分类号： G11B7/00

    CPC分类号： G11B20/10212 ,  G11B7/0053 ,  G11B7/24082 ,  G11B20/00086 ,  G11B20/00601 ,  G11B20/1403

    摘要： A pit data generation circuit generates a first clock signal synchronized with pit data and a pit synchronization signal from a sum read signal obtained by reading the length of a pit. A division circuit generates a second clock signal by frequency-dividing the first clock signal. The division circuit is reset by the pit synchronization signal, and is capable of adjusting the phase of the second clock signal.

    摘要翻译： 凹坑数据生成电路从通过读取凹坑的长度获得的和读信号产生与凹坑数据同步的第一时钟信号和凹坑同步信号。 分频电路通过对第一时钟信号进行分频来产生第二时钟信号。 分频电路由凹坑同步信号复位，能够调整第二时钟信号的相位。