Noise reduction circuit for video control emphasis signal

Details Noise reduction circuit for video control emphasis signal Noise reduction circuit for video control emphasis signal

1989-06-09

1991-04-30

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 36, H04N 5213

Patent

active

050123416

ABSTRACT:
A noise reduction circuit for video contour emphasis signal including an amplification circuit for the contour signal, mean value detection circuit for the contour signal, a noise reduction level control circuit, positive and negative noise reduction circuit and output level control circuit, thereby eliminating the noise signal included in the contour signal and improving the signal to noise ratio.

REFERENCES:
patent: 4189755 (1980-02-01), Balbes
patent: 4200888 (1980-04-01), Blom
patent: 4359755 (1982-11-01), Srivastava
patent: 4622520 (1986-11-01), Kuroda

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