Tracking servo and method for tracking optical disc and optical disc device using the tracking servo
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United States of America Patent
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Apr 30, 2013
Grant Date -
N/A
app pub date -
Sep 29, 2012
filing date -
May 23, 2012
priority date (Note) -
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Abstract
A tracking method executed by an optical disc device. The optical disc device includes an optical head for emitting light to read or write data from or to an optical disc. The tracking method includes steps of: providing a table for listing a plurality of predetermined track classes, and a plurality of tracking errors; calculating the number of tracks between a current track in which the optical head is currently positioned and a target track from or to which the optical head reads or writes data; determining whether the number of tracks reaches a predetermined number; searching the table for the corresponding tracking errors when the number of tracking error reaches a predetermined number; calculating second jumping tracks based on the first jumping tracks and the found tracking errors; and driving the optical head to move to the second jumping tracks for tracking.
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