Noise suppression apparatus

Details Noise suppression apparatus Noise suppression apparatus

1977-08-30

1979-08-14

Murray, Richard

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

325 52, 325 65, 325313, 325371, 325473, H04N 521, H04B 110, H04B 1500

Patent

active

041647580

ABSTRACT:
An improved noise suppression apparatus for reducing noise contamination of a video enhancement signal including a first circuit for developing a first signal proportional to the absolute value of the enhancement signal, a peak clipper for limiting the excursion of the first signal to a predetermined level and a multiplier responsive to the enhancement signal and the clipped first signal for developing a noise reduced video enhancing signal.

REFERENCES:
patent: 3605018 (1971-09-01), Coviello
patent: 3800077 (1974-03-01), Smith
patent: 3821482 (1974-06-01), Hirsch
patent: 3975586 (1976-08-01), Chow et al.
patent: 4015076 (1977-03-01), Ishiodori

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