Automatic video signal peaking control

Details Automatic video signal peaking control Automatic video signal peaking control

1981-04-20

1982-09-21

Richardson, Robert L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

H04N 514

Patent

active

043510035

ABSTRACT:
A circuit for automatically controlling the high frequency peaking content of an image representative video signal processed in the luminance signal path of a television receiver is disclosed. The luminance path also includes a linear phase network for generating a peaking signal which is added to the video signal for accentuating high frequency video signal components. The control circuit forms a closed feedback loop with the peaking network. The control circuit develops a control voltage in response to the high frequency content of the video signal, including peaking components already present in the video signal and as imparted from the peaking network. The control voltage controls the level of the locally generated peaking component to maintain the overall peaking content of the video signal within desired limits. A viewer adjustable peaking preference control is included in the feedback loop to tailor the response of the automatic peaking control network with respect to a desired level of signal peaking in accordance with the setting of the preference control.

REFERENCES:
patent: 3800077 (1974-03-01), Smith
patent: 3919714 (1975-11-01), Bingham
patent: 3984631 (1976-10-01), Avicola
patent: 4075661 (1978-02-01), Heffron
patent: 4080627 (1978-03-01), Wheeler
patent: 4081836 (1978-03-01), Skinner

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