Track calculation method for fixing track jumps of optical discs of different capacities
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United States of America Patent
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Nov 17, 2009
Grant Date -
Aug 27, 2009
app pub date -
Mar 28, 2008
filing date -
Feb 22, 2008
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An appropriate track calculation equation is inducted according to a relationship between a storage area and a track pitch of a compact disc, and a pickup unit is instantly shifted to a location calculated with the track calculation equation. Therefore, an error after performing a track jump modulation is reduced to a smallest degree, and in other words, the pickup unit may access a location on the disc currently required by a user without frequent or time-consuming long seeks. As a result, when the pickup unit accesses compact discs having unknown formats, which indicate different capacities or properties, a track error may be calculated in a shortest time so as to shift the pickup unit accordingly and to fix track jumps, and the user may browse any location on the compact discs having unknown formats smoothly.
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