Noise reduction method and apparatus

Details Noise reduction method and apparatus Noise reduction method and apparatus

1995-12-18

1997-03-18

Kostak, Victor R.

Television

Image signal processing circuitry specific to television

Motion dependent key signal generation or scene change...

348622, H04N 5213

Patent

active

056127529

ABSTRACT:
In a method of reducing the noise in a signal from a motion detector for video signals, in which a part of the amplitude range of the signal below a threshold value is suppressed, the minimum of the signal is determined by means of a control loop, starting with a minimum threshold value. The threshold value is increased when the minimum of the signal exceeds a given value, preferably 0, and is reduced when the minimum of the signal lies below the given value.

REFERENCES:
patent: 4485403 (1984-11-01), Illetschko
patent: 4525741 (1985-06-01), Chahal et al.
patent: 4652907 (1987-03-01), Fling
patent: 4807035 (1989-02-01), Sayliss
patent: 4857625 (1989-06-01), Douziech et al.
patent: 4926361 (1990-05-01), Ohtsubo et al.

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