Noise reduction circuit and method

Details Noise reduction circuit and method Noise reduction circuit and method

2007-10-09

2007-10-09

Yenke, Brian P. (Department: 2622)

Television

Image signal processing circuitry specific to television

Motion dependent key signal generation or scene change...

C348S607000, C348S624000, C348S618000, C348S620000, C382S254000, C382S264000, C382S275000

Reexamination Certificate

active

10981776

ABSTRACT:
A noise reduction circuit and method effectively reduce noise with a simple structure regardless of the partial content of an image while suppressing an increase in the capacity of the image memory used and process delays. The present invention forms noise-reduced data by utilizing a correlation between from the difference between a pixel subjected to noise reduction and data of a pixel that is shifted by a predetermined amount in a time direction and/or spatial direction, and forms a difference cause discriminating signal indicating whether the difference is due to a valid change of the image. The noise-reduced data and the difference cause discriminating signal are formed for a plurality of different correlations. Final noise-reduced video data are obtained by selecting a method for determining the final noise-reduced video data based on the difference cause discriminating signals, and accordingly selecting/combining the plurality of noise-reduced data.

REFERENCES:
patent: 5969777 (1999-10-01), Mawatari
patent: 6061100 (2000-05-01), Ward et al.
patent: 6094231 (2000-07-01), Wischer-Mann
patent: 6307888 (2001-10-01), Le Clerc
patent: 6667776 (2003-12-01), Sumiyoshi et al.
patent: 6847408 (2005-01-01), Webb
patent: 7064793 (2006-06-01), Hahn et al.
patent: 7098958 (2006-08-01), Wredenhagen et al.
patent: 7170562 (2007-01-01), Yoo et al.
patent: 7199838 (2007-04-01), Lin et al.
patent: 2002/0080281 (2002-06-01), Yoshiyama et al.
patent: 2005/0128356 (2005-06-01), Babonneau et al.
patent: 2002-223374 (2002-08-01), None

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