Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal
Reexamination Certificate
2005-07-05
2005-07-05
Patel, Gautam R. (Department: 2655)
Dynamic information storage or retrieval
Control of storage or retrieval operation by a control...
Mechanism control by the control signal
C369S047370, C369S053300
Reexamination Certificate
active
06914862
ABSTRACT:
A device and method for calibrating linear velocity and track pitch for an optical disc is disclosed. The device comprises a frequency divider, a synchronous bit-clock generator, a counter and a linear velocity and track pitch calculator. The frequency divider receives a motor frequency generator (FG) pulse and generates a motor rotation period signal (FG/X). The synchronous bit-clock generator generates a high frequency bit-clock according to a reproduced signal read from disc. The bit counter counts the pulse of the bit-clock for each period of the motor rotation period signal to generate the data amount M. The linear velocity and track pitch calculator calculates the linear velocity by a linear velocity function with the information of the data amount M and the motor rotation period. Then, the linear velocity and track pitch calculator calculates the track pitch by a pitch function with the information of the data amount, radius and linear velocity at different tracks.
REFERENCES:
patent: 4805050 (1989-02-01), Aoyagi et al.
patent: 4866695 (1989-09-01), Suzuki et al.
patent: 5680023 (1997-10-01), Komaki
patent: 5780982 (1998-07-01), Tagiri
patent: 5877623 (1999-03-01), Min
patent: 5920531 (1999-07-01), Tamura et al.
patent: 6018506 (2000-01-01), Okabe et al.
patent: 6266318 (2001-07-01), Honda et al.
patent: 6690640 (2004-02-01), Van Den Enden
Ho Chi-Kwong
Hsu Jin-Chuan
Tsai Chao-Long
Birch Stewart Kolasch & Birch, LLP.
Mediatek Inc.
Patel Gautam R.
LandOfFree
Device and method for calibrating linear velocity and track... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device and method for calibrating linear velocity and track..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device and method for calibrating linear velocity and track... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3386834