Video signal processor for removing high frequency noise compone

Details Video signal processor for removing high frequency noise compone Video signal processor for removing high frequency noise compone

1990-05-02

1992-01-07

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 36, 358 37, 358166, 358340, H04N 5213

Patent

active

050796330

ABSTRACT:
A video signal processor comprises a first filtering circuit, a first and a second emphasis circuits, a noise removing circuit, and a converter. The first filtering circuit filters an input video signal, and extracts a low frequency component. The first emphasis circuit emphasizes the low frequency component, and outputs a first emphasized signal. The second emphasis circuit emphasizes the first emphasized signal, and outputs a second emphasized signal. The noise removing circuit removes a noise component from either the first emphasized signal or the second emphasized signal, and outputs the noise-removed signal. The converter converts the noise-removed signal into a frequency-modulated signal.

REFERENCES:
patent: 4597021 (1986-06-01), Yamamitsu
patent: 4612585 (1986-09-01), Takase
patent: 4626927 (1986-12-01), Hirota
patent: 4658305 (1987-04-01), Tsushima
"Document of VTR-Designed Most-Advanced Techniques", Japan, pp. 167-168.

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