Dynamic information storage or retrieval – Binary pulse train information signal – Binary signal level detecting using a reference signal
Reexamination Certificate
2005-12-27
2005-12-27
Patel, Gautam R. (Department: 2655)
Dynamic information storage or retrieval
Binary pulse train information signal
Binary signal level detecting using a reference signal
C369S059270, C369S059120
Reexamination Certificate
active
06980500
ABSTRACT:
An ATIP (absolute time in pre-groove) bit data generator free from an uneven duty cycle. The ATIP bit data generator includes an analog processor, a high-frequency clock generator, a first decoder, a sync pattern detector, and a second decoder. The analog processor receives a signal generated from an optical pickup, and further processes the signal to generate an ATIP FM signal. The high-frequency clock generator provides a high-frequency clock using the ATIP FM signal as a reference signal. The first decoder receives the ATIP FM signal and the high-frequency clock and generates bi-phase data. The sync pattern detector receives the bi-phase data and the high-frequency clock, and generates a sync indication signal. The second decoder counts the pulse number of the high-frequency clock for each counting cycle, and the counting cycle includes a plurality of half periods of the ATIP FM signal. When the pulse number is smaller than a lower threshold value or greater than a upper threshold value, the second decoder outputs ATIP bit data with a first level. When the pulse number is between the lower threshold value and the upper threshold value, the second decoder outputs ATIP bit data with a second level.
REFERENCES:
patent: 4942565 (1990-07-01), Lagadec
patent: 5506824 (1996-04-01), Fairchild et al.
patent: 6125089 (2000-09-01), Shigemori
Liang Yao-Jen
Lu Ping-Hsing
Tsai Chao-Long
Birch & Stewart Kolasch & Birch, LLP
Media Tek Inc.
Patel Gautam R.
LandOfFree
ATIP bit data generator and method for generating ATIP bit... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with ATIP bit data generator and method for generating ATIP bit..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and ATIP bit data generator and method for generating ATIP bit... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3505931