Television – Synchronization – Sync separation
Reexamination Certificate
2006-05-23
2006-05-23
Kostak, Victor R. (Department: 2614)
Television
Synchronization
Sync separation
C348S512000, C348S540000
Reexamination Certificate
active
07050111
ABSTRACT:
A synchronization process may include detecting successive horizontal synchronization pulses of a video signal, and a phase comparison between the successive detected pulses and the successive transitions of the reference signal for controlling the oscillator of the phase-locked loop. The detection of each horizontal synchronization pulse may include sampling the video signal, low-pass filtering the sampled signal, thresholding the filtered signal for leaving pulses having a level below a threshold. The synchronization process may also include selecting, as a function of predetermined selection criteria, from among the residual pulses within an observation window centered on a transition of the reference signal for the one which corresponds to the horizontal synchronization pulse.
REFERENCES:
patent: 4203076 (1980-05-01), Yamashita
patent: 4467359 (1984-08-01), Hosoya
patent: 4792852 (1988-12-01), Narusawa
patent: 5126639 (1992-06-01), Srivastava
patent: 5184091 (1993-02-01), Srivastava
patent: 5485220 (1996-01-01), McNeilly et al.
patent: 5608462 (1997-03-01), Maas et al.
patent: 5731843 (1998-03-01), Cappels, Sr.
patent: 5844622 (1998-12-01), Hulvey
patent: 5877640 (1999-03-01), Geerlings
patent: 6028642 (2000-02-01), Rinaldi et al.
patent: 6229401 (2001-05-01), Wilber
patent: 6392642 (2002-05-01), Wu
patent: 6833875 (2004-12-01), Yang et al.
patent: 2685584 (1993-06-01), None
Patent Abstracts of Japan, vol. 013, No. 005, Jan. 9, 1989 & JP63215170A, Seiko Epson Corp, Sep. 7, 1998.
Allen Dyer Doppelt Milbrath & Gilchrist, P.A.
STMicroelectronics SA
LandOfFree
Process and device for synchronizing a reference signal with... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process and device for synchronizing a reference signal with..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process and device for synchronizing a reference signal with... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3548053