System for compensating jitter of video signal

Details System for compensating jitter of video signal System for compensating jitter of video signal

1976-06-22

1978-03-28

Griffin, Robert L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

360 36, 358 8, H04N 504, H04N 578, H04N 576

Patent

active

040818349

ABSTRACT:
A horizontal synchronizing signal contained in a composite video signal undergoing a phase fluctuation is phase modulated and substituted for the original horizontal synchronizing signal. The phase modulation of the horizontal synchronizing signal of the input signal is effected at a phase modulation circuit and then the phase modulated signal is applied to an AFC circuit unit which has the same transfer characteristic as that of a horizontal AFC circuit of an ordinary television receiver set. The phase modulation circuit is controlled by a signal in response to a phase difference between the output of the AFC circuit unit and the original horizontal synchronizing signal. A composite video signal containing the horizontal synchronizing signal subjected to the phase modulation in this manner is applied to the television receiver set, thereby displaying a picture image free from the fluctuation.

REFERENCES:
patent: 3676583 (1972-07-01), Morita et al.
patent: 3681522 (1972-08-01), Tanabe
patent: 3781470 (1973-12-01), Horn

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