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    Optical disc including a learning area having first and second regions, and methods for reproducing and recording data on the optical disc
    91.
    发明授权
    Optical disc including a learning area having first and second regions, and methods for reproducing and recording data on the optical disc 有权
    包括具有第一和第二区域的学习区域的光盘以及用于在光盘上再现和记录数据的方法

    公开(公告)号：US07920459B2

    公开(公告)日：2011-04-05

    申请号：US12335106

    申请日：2008-12-15

    Applicant: Atsushi Nakamura ,  Mamoru Shoji ,  Takashi Ishida

    Inventor： Atsushi Nakamura ,  Mamoru Shoji ,  Takashi Ishida

    IPC: G11B7/24

    CPC classification number: G11B7/00745 ,  G11B7/00454 ,  G11B7/0901 ,  G11B7/0908 ,  G11B7/0956 ,  G11B7/126 ,  G11B7/1267 ,  G11B2007/0013

    Abstract: When recording or reading an optical disc having plural data recording layers, which data recording layer the light spot is focused on is detected to improve playback signal quality and signals written to the layer on which the light spot is focused are read more reliably. A convergent lens converges the laser beam on the optical disc, and a focus controller controls the focal point of the laser beam on the data layer. A tracking controller positions and tracks the focal point of the laser beam converged by the convergent lens on a track of the optical disc. A photodetector detects the reflected laser beam from the disc. A convergence detector then detects the convergence state of the laser beam emitted to the plural data recording layers. Based on output from the convergence detector, the laser driver is controlled to separately set beam power appropriately for each of the plural data layers of the disc during playback.

    Abstract translation: 当记录或读取具有多个数据记录层的光盘时，检测到该光斑聚焦的哪个数据记录层以提高重放信号质量，并且更可靠地读取写入到其上聚焦光点的层的信号。 会聚透镜将激光束会聚在光盘上，并且聚焦控制器控制激光束在数据层上的焦点。 跟踪控制器将由会聚透镜会聚的激光束的焦点位置并跟踪在光盘的轨道上。 光电检测器检测来自盘的反射激光束。 然后，会聚检测器检测发射到多个数据记录层的激光束的会聚状态。 基于会聚检测器的输出，激光驱动器被控制为在回放期间对盘的多个数据层中的每一个分别设置光束功率。

    OPTICAL DISC, OPTICAL DISC RECORDING APPARATUS, AND OPTICAL DISC RECORDING METHOD
    95.
    发明申请
    OPTICAL DISC, OPTICAL DISC RECORDING APPARATUS, AND OPTICAL DISC RECORDING METHOD 有权
    光盘，光盘记录装置和光盘记录方法

    公开(公告)号：US20090201780A1

    公开(公告)日：2009-08-13

    申请号：US12425732

    申请日：2009-04-17

    Applicant: Takashi Ishida ,  Motoshi Ito

    Inventor： Takashi Ishida ,  Motoshi Ito

    IPC: G11B7/12

    CPC classification number: G11B7/00736 ,  G11B7/00456 ,  G11B7/0062 ,  G11B7/126 ,  G11B20/10 ,  G11B20/1217 ,  G11B27/034 ,  G11B27/329 ,  G11B2020/1221 ,  G11B2020/1232 ,  G11B2020/1294 ,  G11B2220/20 ,  G11B2220/2537

    Abstract: Drive information is updated to always include the recording/playback conditions determined from the most recent learning process on a data recording medium. The data recording medium has a data recording area for recording data, and a drive information area for recording drive information. The drive information includes a plurality of drive-specific information records. Each of the plural drive-specific information records defines the operating conditions of the data recording and playback apparatus when a data recording and playback apparatus that can load and access the data recording medium reads or writes data. The plural drive-specific information records are arranged chronologically according to when the information was recorded to the data recording medium.

    Abstract translation: 驱动信息被更新为始终包括从数据记录介质上的最新学习过程确定的记录/播放条件。 数据记录介质具有用于记录数据的数据记录区域和用于记录驱动信息的驱动信息区域。 驱动器信息包括多个驱动器专用信息记录。 当能够加载和访问数据记录介质的数据记录和重放装置读取或写入数据时，多个驱动器专用信息记录中的每一个定义数据记录和重放装置的操作条件。 根据信息被记录到数据记录介质的时间顺序排列多个驱动器专用信息记录。

    Recording method and media having marks and spaces with lengths defined by a predetermined modulation method
    97.
    发明授权
    Recording method and media having marks and spaces with lengths defined by a predetermined modulation method 有权
    记录方法和具有由预定调制方法定义的长度的标记和间隔的介质

    公开(公告)号：US07486605B2

    公开(公告)日：2009-02-03

    申请号：US11467130

    申请日：2006-08-24

    Applicant: Mamoru Shoji ,  Kenji Koishi ,  Atsushi Nakamura ,  Takashi Ishida ,  Shuichi Tasaka

    Inventor： Mamoru Shoji ,  Kenji Koishi ,  Atsushi Nakamura ,  Takashi Ishida ,  Shuichi Tasaka

    IPC: G11B7/0045

    CPC classification number: G11B7/24085 ,  G11B7/00456 ,  G11B11/10506 ,  G11B11/1053

    Abstract: The optical data recording method comprising the steps of: modulating data to be recorded, to generate a plurality of recording modulation codes; and emitting a pulse-like light beam to an optical disc, so that a plurality of recording marks and spaces which have lengths corresponding to the plurality of recording modulation codes are formed on the optical disc. In the optical data recording method, at least two of the plurality of recording marks comprises: a first pulse which is disposed at a front and forms a leading edge of the recording mark, a last pulse which is disposed at a backend and forms a trailing edge of the recording mark, and a multi-pulse train which is disposed between the first pulse and the last pulse and forms a center of the recording mark. The multi-pulse train has a pulse period longer than T which represents a reference period of the recording modulation code.

    Abstract translation: 该光学数据记录方法包括以下步骤：调制要记录的数据，以产生多个记录调制码; 并向光盘发射脉冲状光束，使得在光盘上形成具有与多个记录调制码对应的长度的多个记录标记和空间。 在光学数据记录方法中，多个记录标记中的至少两个记录标记包括：设置在前面并形成记录标记的前沿的第一脉冲，设置在后端并形成尾部的最后脉冲 记录标记的边缘，以及设置在第一脉冲和最后脉冲之间并形成记录标记的中心的多脉冲串。 多脉冲串具有长于T的脉冲周期，其表示记录调制码的参考周期。

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