Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1981-10-09
1983-06-14
Murray, Richard
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
H04N 514
Patent
active
043886477
ABSTRACT:
A DC coupled system for automatically controlling the high frequency peaking content of a video signal is disclosed. A peak detector develops a control voltage representative of the high frequency content of the video signal. The control voltage controls a differential control input peaking signal splitter to provide controlled amounts of complementary phased peaking signals, which are differentially combined with complimentary phased video signals to produce a controllably peaked video signal. The differential control inputs of the peaking signal splitter receive balanced quiescent bias from symmetrical bias coupling networks, one of which includes the peak detector.
REFERENCES:
patent: 4069505 (1978-01-01), Burdick et al.
patent: 4075661 (1978-02-01), Heffron
patent: 4081836 (1978-03-01), Skinner
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.
Harwood Leopold A.
Hettiger James
Shanley, II Robert L.
Kurdyla Ronald H.
Murray Richard
Rasmussen Paul J.
RCA Corporation
Whitacre Eugene M.
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