Method and circuit for reducing noise

Details Method and circuit for reducing noise Method and circuit for reducing noise

1997-04-17

2000-01-04

Le, Dinh T.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

Unwanted signal suppression

327552, 348606, 348607, H03K 500

Patent

active

060114304

ABSTRACT:
A noise reduction method and circuit determines the presence of an impulse component in a current input sample by generating two windows of different size and detecting the impulse component in the two respective windows in order to prevent degradation of an input image signal due to an erroneous detection. If the impulse component is not detected in the sample, the sample is bypassed. However, if the impulse component is detected, the sample is trimmed by a trimmed mean filter and then output.

REFERENCES:
patent: 4467634 (1984-08-01), Rohde et al.
patent: 5379074 (1995-01-01), Hwang
patent: 5414472 (1995-05-01), Hwang
patent: 5686972 (1997-11-01), Kim

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