发明申请
- 专利标题： Information recording medium, information recording/reproducing apparatus and information reproducing method
- 专利标题（中）： 信息记录介质，信息记录/再现装置和信息再现方法
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申请号： US10925149申请日： 2004-08-25
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公开(公告)号： US20050078576A1公开(公告)日： 2005-04-14
- 发明人: Kazuo Kuroda , Akira Imamura
- 申请人： Kazuo Kuroda , Akira Imamura
- 专利权人： Pioneer Corporation
- 当前专利权人： Pioneer Corporation
- 优先权： JP2003-301119 20030826
- 主分类号： G11B20/14
- IPC分类号： G11B20/14 ; G11B7/004 ; G11B7/005 ; G11B7/007 ; G11B7/09 ; G11B20/00 ; G11B5/09
摘要：
An optical disc has a spiral standard locus. A groove is formed as a wobble which meanders or wobbles along the standard locus. The wobble is determined from a wobble signal. The wobble signal is modulated such that a DC offset of the wobble signal is cancelled by a symbol unit of predetermined data. Therefore, in tracking servo upon reproducing, the position of an optical pickup can be converged onto the amplitude center of the wobble in a short time.
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