Wobble demodulation for high density optical recording media

Details Wobble demodulation for high density optical recording media Wobble demodulation for high density optical recording media

2007-12-04

2007-12-04

Hindi, Nabil (Department: 2627)

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Control of information signal processing channel

Reexamination Certificate

active

10914488

ABSTRACT:
The present invention relates to a method for the demodulation of the ADIP data of a wobble signal of an optical recording medium, whereby the wobble signal comprises different types of wobble periods, and to an apparatus for reading from and/or writing to optical recording media using such method. According to the invention, the method comprises the steps oftransforming the frequency and/or phase of harmonic deviations within the wobble signal to amplitude deviations,detecting the amplitude deviations, anddetecting a current type of wobble period from the detected amplitude deviations.

REFERENCES:
patent: 6690641 (2004-02-01), Miyamoto et al.
patent: 6791921 (2004-09-01), Maeda et al.
patent: 7193936 (2007-03-01), Oki
patent: 1271489 (2003-01-01), None
patent: 1324320 (2003-07-01), None
patent: 03034414 (2003-04-01), None
EPO Search Report.

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