HD DVD wobble detection circuit

Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Reexamination Certificate

active

07978579

ABSTRACT:
In a circuit, a wobble detector detects a wobble signal from an optical recording medium and a synchronization signal based on the wobble signal and provides a wobble clock signal. A wobble signal phase imperfection detector responds to the wobble signal and detects and corrects a phase transition imperfection in the wobble signal. The imperfection detector integrates a first scaled wobble signal sample over a half period portion of the wobble clock signal; compares the first scaled wobble signal sample integrated over one period of the wobble clock signal to a variable threshold value; and based on the comparison, outputs either the half period integrated and scaled wobble sample or the first scaled wobble sample integrated over one period of the wobble clock signal. The imperfection detector further decodes the output to obtain wobble address period data. In one embodiment, the imperfection detector may include a half period integrator, a comparator, a selector, and a decoder to perform the indicated functions.

REFERENCES:
patent: 6345018 (2002-02-01), Maegawa et al.
patent: RE39513 (2007-03-01), Maegawa et al.
patent: 7400561 (2008-07-01), Serrano et al.
patent: 2003/0099180 (2003-05-01), Park et al.
patent: 2005/0068866 (2005-03-01), Serrano et al.
patent: 2006/0077849 (2006-04-01), Chen et al.
ECMA International, “Data Interchange on 120 mm and 80 mm Optical Disk using + RW Format—Capacity: 4, 7 and 1, 46 Gbytes per Side”, (Recording speed up to 4X), Rue du Rhône 114, CH-1204, Geneva, www.ecma-international.org Standard ECMA-337, 3rd Edition, Dec. 2005; pp. 1-143.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

HD DVD wobble detection circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with HD DVD wobble detection circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and HD DVD wobble detection circuit will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2719068

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.