Video signal noise level estimator

Details Video signal noise level estimator Video signal noise level estimator

2006-05-16

2006-05-16

Kostak, Victor R. (Department: 2614)

Television

Image signal processing circuitry specific to television

Motion dependent key signal generation or scene change...

C348S607000, C375S240290

Reexamination Certificate

active

07046307

ABSTRACT:
A method and apparatus for noise level estimation in a digital video signal, the apparatus including a pixel activity detector that produces a mean pixel activity level for each picture in the video signal, a contrast analyzer that produces a contrast activity level for each picture and a noise level calculator that is coupled to the activity detector and contrast analyzer to produce an estimated noise level by offsetting the contrast activity level from accumulated output of the activity detector.

REFERENCES:
patent: 5018215 (1991-05-01), Nasr et al.
patent: 5257121 (1993-10-01), Steinberg
patent: 5610729 (1997-03-01), Nakajima
patent: 6052484 (2000-04-01), Kobayashi
patent: 43 41 760 (1995-06-01), None

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