Video noise reduction circuit

Details Video noise reduction circuit Video noise reduction circuit

1976-03-17

1977-02-22

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

178DIG12, 358 36, H04N 521

Patent

active

040093344

ABSTRACT:
In a method and apparatus for reducing noise in a video signal, the low-frequency component is extracted from the video signal by filtering; the low-frequency component is then subtracted from the video signal to yield a high-frequency component; the high-frequency component is cored to remove the low-amplitude portions therefrom; and the cored high-frequency component is combined with the low-frequency component to produce a video signal having reduced noise.

REFERENCES:
patent: 3333055 (1967-07-01), Krause
patent: 3602737 (1971-08-01), Radecke
patent: 3715477 (1973-02-01), Olson

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