Synchronizing phase shift corrected synchronous signal detecting

Details Synchronizing phase shift corrected synchronous signal detecting Synchronizing phase shift corrected synchronous signal detecting

1991-06-11

1993-06-15

Sniezek, Andrew L.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 17, 358337, 360 361, 360 362, H04N 576, H04N 595

Patent

active

052204111

ABSTRACT:
In a system for eliminating time base fluctuation of a video signal having a synchronizing signal and a burst reproduced from a video disk, for example, the synchronism is first coarsely pulled in on the basis of the horizontal synchronizing signal and then precisely follows the time base fluctuation on the basis of the burst signal. A shift of the output synchronizing signal is corrected by using a phase detection of an input horizontal synchronizing signal when an output synchronizing signal is produced on the basis of the read address of a memory for eliminating time base fluctuation, thereby preventing, for example, a superimposed character using the output synchronizing signal from fluctuating on a picture.

REFERENCES:
patent: 4733311 (1988-03-01), Yoshinaka
patent: 4772950 (1988-09-01), Furuhata et al.
patent: 4802026 (1989-01-01), Kaneko et al.
patent: 4977462 (1990-12-01), Takanashi et al.
patent: 4989073 (1991-01-01), Wagner
patent: 5062005 (1991-10-01), Kitaura et al.

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