Optical disc device with normal resolution signal selection...

Details Optical disc device with normal resolution signal selection... Optical disc device with normal resolution signal selection...

2007-02-12

2010-06-15

Huber, Paul (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S053310

Reexamination Certificate

active

07738349

ABSTRACT:
A normal resolution component included in a readout signal of a super resolution optical disc is canceled to improve quality of the readout signal. The normal resolution component is separated from the readout signal of the super resolution optical disc by using a normal resolution selection filter such as a low pass filter, a mark length determination circuit, and then the normal resolution component is subtracted from an original readout signal while gain and a phase are appropriately controlled. Thereby, an influence of crosstalk due to the normal resolution component is reduced.

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patent: 2006-107588 (2006-04-01), None

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