| 摘要 |
A playback signal from an optical disk includes a track cross component which is produced when a head traverses tracks on the disk and a recorded area component produced when the head passes an area on the tracks on which data is recorded. The recorded area component is especially affected by a high frequency signal. A control signal which includes the recorded area component but not the track cross component is generated by adjusting the high frequency signal. A gain of a tracking servo control is controlled by the control signal.
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