Noise reduction system for color television signal

Details Noise reduction system for color television signal Noise reduction system for color television signal

1991-04-29

1992-11-03

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358105, H04N 5213

Patent

active

051610183

ABSTRACT:
A noise reducer of a signal receiving circuit system applying different manners of signal processing to moving video image and still video image regions includes a noise reduction circuit detecting a two-frame difference signal of a received video signal and deducting the two-frame difference signal from the received video signal thereby reducing remaining noise in the still video image region, in which the proportion of the two-frame difference signal to be deducted in the noise reduction circuit is controlled by the noise level of the received video signal and a signal obtained in accordance with a detected quantity of motion in the received video signal.

REFERENCES:
patent: 4242704 (1980-12-01), Ito et al.
patent: 4242705 (1980-12-01), Ebihara
patent: 4539594 (1985-09-01), Illetschko
patent: 4639784 (1987-01-01), Fling
patent: 4646138 (1987-02-01), Willis
patent: 4811092 (1989-03-01), Achiha et al.
patent: 4954894 (1990-09-01), Kitaura
patent: 5055920 (1991-10-01), Illetschko et al.
patent: 5065241 (1991-01-01), Iga

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