Method of and circuit for removing noise signals from video sign

Details Method of and circuit for removing noise signals from video sign Method of and circuit for removing noise signals from video sign

1994-12-15

2000-07-25

Hsia, Sherrie

Television

Image signal processing circuitry specific to television

Noise or undesired signal reduction

348620, H04N 5213

Patent

active

060942312

ABSTRACT:
A method of and a circuit for removing noise signals from video signals by adaptive median filtering which masks errors in large-size disturbed picture areas caused by dirt and dust during scanning of the film. In this method, the picture content is always classified in stationary, moving, undisturbed and disturbed picture areas. Subsequent thereto, error masking is only effected by temporal median filtering in only the disturbed, stationary picture area.

REFERENCES:
patent: 5404178 (1995-04-01), Kondo
patent: 5485222 (1996-01-01), Wischermann
patent: 5519453 (1996-05-01), Wischermann
patent: 5543858 (1996-08-01), Wischermann

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