Device and method for reproducing optical disk
    33.
    发明专利
    Device and method for reproducing optical disk 审中-公开
    用于复制光盘的设备和方法

    公开(公告)号:JP2011198401A

    公开(公告)日:2011-10-06

    申请号:JP2010062323

    申请日:2010-03-18

    Abstract: PROBLEM TO BE SOLVED: To record sub-information without increasing the cost required for manufacturing a disk and degrading the reading accuracy of main information, and to reproduce the sub-information by reliable and stable reading.SOLUTION: An optical disk reproducing device includes: a predetermined area-specifying circuit which specifies a position of a predetermined area, where a postscript mark is recorded at least in a part; a pit and/or land length-detecting circuit which detects each length of a plurality of pits and/or lands contained in a predetermined area; and a predetermined length-discriminating circuit which discriminates that each detected pit and/or land length is equal to or more than the predetermined length. The center part of a pit and/or a land which are discriminated to be equal to or more than the predetermined length is taken as a detecting section of second information and the second information is reproduced from a reproduction signal of the second information detection section.

    Abstract translation: 要解决的问题:记录子信息,而不增加制造磁盘所需的成本并降低主信息的读取精度,并通过可靠和稳定的读取来再现子信息。解决方案:一种光盘再现装置,包括: 指定区域指定电路,其规定至少在一部分中记录后标标记的预定区域的位置; 用于检测包含在预定区域中的多个凹坑和/或平台的每个长度的凹坑和/或平台长度检测电路; 以及鉴别每个检测到的凹坑和/或平台长度等于或大于预定长度的预定长度鉴别电路。 被识别为等于或大于预定长度的凹坑和/或焊盘的中心部分被认为是第二信息的检测部分,并且从第二信息检测部分的再现信号再现第二信息。

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