Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Yi-Chung Chan0
Date of Patent
November 30, 2010
0Patent Application Number
106930520
Date Filed
October 23, 2003
0Patent Primary Examiner
Patent abstract
A method for discriminating an optical storage medium is disclosed. A predetermined range of the optical storage medium is read after the light source is focused on; and thereby a plurality of data transition points and transition regions defined by an interval of two neighboring points are obtained. Thereafter, the time-consumption for reading the longest transition region is used to determine the type of the currently accessed optical storage medium. Another physical characteristics according to data storage formats, such as the PLL clock frequency or the distance between the reflection layer and the surface layer of the optical storage medium, may be used as references to discriminate the currently accessed optical storage medium.
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