Variable peaking control circuit

Details Variable peaking control circuit Variable peaking control circuit

1981-06-22

1983-05-17

Richardson, Robert L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

H04N 514

Patent

active

043843069

ABSTRACT:
A video signal processing circuit including signal substitution circuitry for eliminating impulse noise has a signal peaking circuit conditionally operable for the duration of one or more video fields depending upon the presence of noise being detected in the vertical blanking interval. A circuit responsive to enabling pulses generated as a result of impulse noise or defects being detected in a vertical blanking interval provides one of two peaking control signals for controlling the level of peaking applied to the video signal by the peaking circuit.

REFERENCES:
patent: 2996576 (1961-08-01), Dolby
patent: 3919714 (1975-11-01), Bingham
patent: 3984631 (1976-10-01), Avicola
patent: 4041531 (1977-08-01), Bingham
patent: 4081836 (1978-03-01), Skinner
patent: 4090217 (1978-03-01), Goyal et al.
patent: 4122489 (1978-10-01), Bolger et al.
patent: 4189755 (1980-02-01), Balbes
patent: 4263616 (1981-04-01), Lee
patent: 4268855 (1981-05-01), Takahashi et al.
patent: 4272785 (1981-06-01), Fuhrer

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