Noise reduction circuit for video signal

Details Noise reduction circuit for video signal Noise reduction circuit for video signal

1985-12-26

1987-03-24

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 36, H04N 5213

Patent

active

046529225

ABSTRACT:
A noise reduction circuit for video signal comprises a first stage noise eliminating circuit for practically eliminating a noise component in the video signal, and a second stage noise eliminating circuit for eliminating a noise component remaining in an output of the first stage noise eliminating circuit. A video signal which is obtained from the second stage noise eliminating circuit has also been eliminated of a noise component existing immediately after a rise in the video signal, and the output video signal of the second stage noise eliminating circuit has been substantially eliminated of all the noise component.

REFERENCES:
patent: 3485942 (1969-12-01), Melchior
patent: 4558353 (1985-12-01), Hirota
patent: 4563704 (1986-01-01), Hirota
patent: 4571613 (1986-02-01), Fukuda
patent: 4587576 (1986-05-01), Hirota et al.
patent: 4607285 (1986-08-01), Hirota et al.

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