发明申请
- 专利标题: OPTICAL DISC APPARATUS AND OPTICAL DISC RECORDING/REPRODUCING METHOD
- 专利标题(中): 光盘装置和光盘记录/再现方法
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申请号: US12778540申请日: 2010-05-12
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公开(公告)号: US20110063961A1公开(公告)日: 2011-03-17
- 发明人: Shinji FUJITA
- 申请人: Shinji FUJITA
- 优先权: JP2009-211248 20090914
- 主分类号: G11B19/02
- IPC分类号: G11B19/02
摘要:
An optical disc apparatus includes an optical pickup including: a light source; an objective lens for converging a light flux emitted from the light source and forming an optical spot on an information recording plane of an optical disc; and an optical modulation unit divided into a plurality of areas for modulating an area containing a main beam of the light flux to change a shape of the optical spot, wherein data is reproduced by converting a reproduction signal read from the optical disc with the optical pickup into an NRZI signal of a predetermined modulation rule by a PRML method. An optical spot shape, laser power setting and PRML setting are changed with each optical disc and each drive operation state.