Noise reduction circuit

Details Noise reduction circuit Noise reduction circuit

1991-05-09

1993-01-05

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

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358 36, 358166, H04N 964

Patent

active

051776006

ABSTRACT:
Disclosed is a noise reduction circuit in which a YC-separated luminance signal and a YC-separated chromaticity signal are separately processed for noise reduction. In the noise reduction circuit, delay elements incorporated in a YC separation circuit are also used as delay elements in a contour correction circuit so as to attain the desired purpose of noise reduction in both the luminance signal and the chromaticity signal and also the desired purpose of contour correction. Thus, both the noise reduction and the contour correction can be achieved by the noise reduction circuit which is simple in structure and inexpensive.

REFERENCES:
patent: 4355333 (1982-10-01), Sato
patent: 4843457 (1989-06-01), Yamagata
patent: 5019895 (1991-05-01), Yamamoto et al.
patent: 5051818 (1991-09-01), Mishima
Takahashi, "Noise Reducer", The Journal of the Institute of Television Egineers of Japan, vol. 33, No. 4, pp. 296-300, 1979.

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