Optical disk drive and correcting method for differential push-pull tracking error signals of the optical disk drive
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United States of America Patent
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Oct 14, 2008
Grant Date -
Sep 14, 2006
app pub date -
Jun 1, 2004
filing date -
Jun 1, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention is disclosed a correcting method for differential push-pull(DPP) tracking error signals of an optical disk drive. A Step (A) divides a CD into a plurality of areas according to magnitudes of the peak values of the DPP tracking error signals, wherein the difference between every two DPP peak values of neighboring areas is larger than a predetermined value. A step (B) measures respectively average DPP peak values of every area in the step A for calculating a gain value of each area according to the average DPP peak values and an ideal DPP peak value under a non-track locking state. A step (C) does gain correction for the DPP tracking error signals according to the corresponding gain value of the area accessed when in accessing to an area of the CD.
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