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Title:
光記録媒体の再生のためのウォブル検出
Document Type and Number:
Japanese Patent JP4412140
Kind Code:
B2
Abstract:
The present invention relates to a method and a device for detecting the type of wobble on an optical recording medium. According to the invention, a programmable digitally tuned oscillator is provided for detecting the wobble at different frequencies and the wobble signal is converted to the base band. Favorably the consistency of the phase of the wobble together with the amplitude of the wobble is used for verifying the presence of the wobble. For this purpose a Cartesian to Polar converter is provided.

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Inventors:
Pierluigi Romzio
Friedrich Heightsman
Application Number:
JP2004293780A
Publication Date:
February 10, 2010
Filing Date:
October 06, 2004
Export Citation:
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Assignee:
Thomson Licensing
International Classes:
G11B7/004; G11B20/10; G11B7/005; G11B19/12
Domestic Patent References:
JP2003115174A
JP2003263733A
JP2002100041A
Attorney, Agent or Firm:
Keiichi Yamamoto



 
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