- 专利标题: Optical disc and optical disc device
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申请号: US11878463申请日: 2007-07-24
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公开(公告)号: US08018812B2公开(公告)日: 2011-09-13
- 发明人: Hironori Nakahara , Nobuo Takeshita , Masaharu Ogawa
- 申请人: Hironori Nakahara , Nobuo Takeshita , Masaharu Ogawa
- 申请人地址: JP Tokyo
- 专利权人: Mitsubishi Electric Corporation
- 当前专利权人: Mitsubishi Electric Corporation
- 当前专利权人地址: JP Tokyo
- 代理机构: Birch, Stewart, Kolasch & Birch, LLP.
- 优先权: JP2005-039026 20050216; JP2005-043131 20050218; JPPCT/JP2005/015160 20050819
- 主分类号: G11B7/20
- IPC分类号: G11B7/20
摘要:
In a multilayer optical disc having information layers conforming to a plurality of different optical disc standards, because the type of each information layer is not recorded in the other information layers, in read and write operations by a compatible optical disc device conforming to a plurality of optical disc standards, every time the information layer being accessed changes, it has been necessary to read the type of the information layer and select a method of generating a tracking error signal adapted to the type of information layer, so access has taken time. In order to solve the above problem, in the optical multilayer disc according to the present invention, having information layers conforming to a plurality of different optical disc standards, in an area in one of the information layers, information about the other information layers is recorded. The time required to access the other information layers can be reduced by using this information to select a tracking error signal generating method.
公开/授权文献
- US20070263499A1 Optical disc and optical disc device 公开/授权日:2007-11-15
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