Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1981-10-09
1983-08-16
Chin, Tommy P.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358 37, 330 96, H04N 514, H04N 552, H03K 100
Patent
active
043994601
ABSTRACT:
A DC coupled system for automatically controlling the high frequency peaking content of a video signal is disclosed. The system includes a DC coupled control path comprising a peak detector for developing a control voltage representative of the high frequency content of the video signal exclusive of video signal DC components, and is preceded by a video signal amplifier. A filter for shaping the frequency response of the control path is connected to the amplifier. A manually adjustable peaking control for controlling the DC bias of the amplifier is also connected to the amplifier. The filter and adjustable peaking control exhibit mutually independent operation, and are both connected to the amplifier via the same single terminal.
REFERENCES:
patent: 4069505 (1978-01-01), Burdick et al.
patent: 4075661 (1978-02-01), Heffron
patent: 4090217 (1978-05-01), Goyal et al.
patent: 4245235 (1981-01-01), Lagoni
patent: 4296435 (1981-10-01), D'Hautecourt et al.
patent: 4351003 (1981-09-01), Harlan
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.
Chin Tommy P.
Kurdyla Ronald H.
Rasmussen Paul J.
RCA Corporation
Whitacre Eugene M.
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