Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1979-04-17
1980-07-22
Griffin, Robert L.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358243, H04N 5197
Patent
active
042142725
ABSTRACT:
A video highlight attenuation processor is disclosed which comprises an it circuit from which first and second signals corresponding to an input signal are derived, a peak detecting and inverting circuit which detects and inverts peak portions of the first signal to produce an intermediate signal, and a mixer which combines the intermediate signal and the second signal such that an output signal is produced which corresponds to the input signal with the D.C. level of the peak portions attenuated.
REFERENCES:
patent: 2414228 (1947-01-01), Gottier
patent: 2424349 (1947-07-01), Cawein
patent: 2978537 (1961-04-01), Kruse, Jr. et al.
patent: 3179743 (1965-04-01), Ahrons et al.
patent: 3558816 (1971-01-01), Wise
patent: 3560645 (1971-02-01), Wallace
Bellamy Werten F. W.
Gapcynski William G.
Griffin Robert L.
Masinick Michael A.
The United States of America as represented by the Secretary of
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