Pre-pit signal generator compensating a pre-pit signal damped, semiconductor integrated circuit, recording and playback apparatus, and pre-pit signal generation method
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United States of America Patent
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Jul 11, 2006
Grant Date -
Sep 25, 2003
app pub date -
Feb 21, 2003
filing date -
Feb 21, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A recording and playback apparatus comprises, a drive unit configured to rotate an optical recording medium including a recording track, a recording and playback unit configured to irradiate a light beam on the recording track, and to perform recording and playback of an information detected a reflected light beam by an upside photo detection area and a downside photo detection area bisected in a tangential direction of the recording track, and a recording and playback controller configured to generate a position tracking signal based on the reflected light beam detected by the upside photo detection area and the downside photo detection area, and to compensate a level of the position tracking signal when the position tracking signal and a record mark on the recording track are detected.
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