Wobbling signal demodulation method, wobbling signal...

Details Wobbling signal demodulation method, wobbling signal... Wobbling signal demodulation method, wobbling signal...

2007-02-06

2007-02-06

Wellington, Andrea (Department: 2627)

Dynamic information storage or retrieval

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

Control of information signal processing channel

C369S053340

Reexamination Certificate

active

10933522

ABSTRACT:
A wobbling signal demodulation method is disclosed that is capable of fast and precisely demodulating a wobbling signal without increasing cost of the circuit. The wobbling signal is obtained based on light reflected from a recording surface of an optical disk having a wobbling track formed thereon, and includes a carrier portion having a predetermined basic period and a phase demodulated wave portion including predetermined information. The wobbling signal demodulation method includes a first step of respectively integrating a portion of the wobbling signal corresponding to a first half of the basic period and a portion of the wobbling signal corresponding to a second half of the basic period in synchronization with a clock signal generated from the carrier portion; a second step of generating a digital signal based on a first integration result corresponding to the first half of the basic period and a second integration result corresponding to the second half of the basic period; and a third step of performing a phase demodulation on the phase demodulated wave portion of the wobbling signal based on the digital signal and the clock signal.

REFERENCES:
patent: 6345018 (2002-02-01), Maegawa et al.
patent: 2003/0214887 (2003-11-01), Mashimo
patent: 2004/0071228 (2004-04-01), Nakata et al.
patent: 2004/0174805 (2004-09-01), Ishibashi et al.
patent: 9-297969 (1997-11-01), None
patent: 10-69646 (1998-03-01), None
patent: 2001-52446 (2001-02-01), None
patent: 2002-74660 (2002-03-01), None
patent: 2002-124043 (2002-04-01), None
patent: 2003-157537 (2003-05-01), None
patent: 2003-203356 (2003-07-01), None
patent: 2004-178770 (2004-06-01), None
Machine translation of JP 2002-074660.

Affiliated with

Also associated with

Rating

Wobbling signal demodulation method, wobbling signal... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Wobbling signal demodulation method, wobbling signal..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wobbling signal demodulation method, wobbling signal... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3847229