| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical storage device capable of reducing the adverse effect by sufficiently suppressing variations in a level of a tracking error signal caused in an ID area on a medium track without losing a servo response of on-track control. SOLUTION: The optical storage device is provided with a correction processing section 100 for correcting level variations appearing in a tracking error signal when a light beam passes an ID area on a medium track during on-track control. That is, in the correction processing section 100, a correction section 204 subtracts a correction value decided by a correction value decision section 200 in a correction timing discriminated by a correction timing discrimination section 202 from a signal value read resulting from an AD converter sampling a tracking error signal for a prescribed period and converting it into digital data. COPYRIGHT: (C)2003,JPO
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