发明名称 |
Optical disc tracking control device, tracking control method, and tracking control program |
摘要 |
A tracking control apparatus for stable tracking lead-in of an optical disc which has wobble grooves as tracks, including: a signal detection unit that detects tracking error and wobble signals from an optical spot; a speed detection unit that calculates a relative moving speed between the optical spot and the tracks; a polarity judgment unit that judges that the optical spot is on a land if a wobble signal amplitude value is equal to or lower than a predetermined value in the vicinity of a zero-cross point; a moving direction judgment unit that, when the relative moving speed is within a predetermined range and the optical spot is on a land, judges a moving direction of the optical spot from a rise/decay direction of the tracking error signal; and a control unit that performs a tracking lead-in by reducing the moving speed, based on the moving speed and moving direction.
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申请公布号 |
US2006044962(A1) |
申请公布日期 |
2006.03.02 |
申请号 |
US20050528795 |
申请日期 |
2005.03.23 |
申请人 |
ISHIBASHI KENZO;UEDA EIJI;BIRUKAWA MASHIRO |
发明人 |
ISHIBASHI KENZO;UEDA EIJI;BIRUKAWA MASHIRO |
分类号 |
G11B7/00;G11B7/005;G11B7/085;G11B7/09;G11B7/095 |
主分类号 |
G11B7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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