Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1981-09-22
1983-05-31
Masinick, Michael A.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358172, H04N 514
Patent
active
043863698
ABSTRACT:
A television receiver includes means for generating a peaking component which is combined with a video signal to produce a peaked video signal, and a control circuit responsive to the peaked video signal during prescribed control intervals for automatically controlling a reference level of the video signal. The peaking component is attenuated during the control intervals to prevent the control network from responding to spurious signals including noise, which would otherwise be enhanced by the peaking generator and distort an output control voltage from the control circuit. In a system wherein the control circuit is arranged in a feedback loop with a peaking generator comprising a delay line, such attenuation also serves to stabilize the feedback control loop against oscillation.
REFERENCES:
patent: 4110790 (1978-08-01), Wheeler
patent: 4263616 (1981-04-01), Lee
patent: 4295435 (1981-10-01), d'Hautecourt
patent: 4316210 (1982-02-01), Wharton
patent: 4316214 (1982-02-01), Yost
patent: 4338630 (1982-07-01), Engel
Schematic circuit diagram (FIG. 31, pp. 39-40) for the RCA CTC-111 Color Television Receiver, as published in the RCA Television Service Data Bulletin (No. C-3, 1981) available from the RCA Consumer Electronics Division, Technical Publications.
Parker Robert P.
Shanley, II Robert L.
Kurdyla Ronald H.
Masinick Michael A.
Rasmussen Paul J.
RCA Corporation
Whitacre Eugene M.
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