Optical drive and method for determining a reading and/or writing position

The invention relates to an optical drive (10) and a method for determining a reading and/or writing position of an optical drive (10). The optical drive (10) in accordance with the invention comprises control means (12) and at least three PLL units (20, 22, 24), wherein the control means (12) are a...

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Bibliographic Details
Main Authors VAN DE PAS JORIS, VERVOORT MICHEL
Format Patent
LanguageChinese
English
Published 25.02.2009
Subjects
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
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Summary:The invention relates to an optical drive (10) and a method for determining a reading and/or writing position of an optical drive (10). The optical drive (10) in accordance with the invention comprises control means (12) and at least three PLL units (20, 22, 24), wherein the control means (12) are adapted to control the three PLL units (20, 22, 24) to try to lock on to three different frequencies characteristic for an optical disc (26). The method in accordance with the invention comprises the step of controlling at least three PLL units (20, 22, 24) to try to lock on to three different frequencies characteristic for an optical disc (26). If the optical disc (26) is a Blue Ray Disc, the three different frequencies can be the HFM frequency, the wobble frequency, and the expected HF frequency.
Bibliography:Application Number: CN200780003505