Noise reduction apparatus

Details Noise reduction apparatus Noise reduction apparatus

2005-04-18

2008-11-18

Tran, Trang U (Department: 2622)

Television

Image signal processing circuitry specific to television

Noise or undesired signal reduction

C348S619000, C348S620000, C348S622000

Reexamination Certificate

active

07453523

ABSTRACT:
A noise reduction apparatus includes a subtracter receives a motion video signal and finds a difference signal indicative of a difference from a motion video signal preceding by 1 frame and from which noise is removed, a first multiplier executes multiplication so as to increase/decrease the difference signal corresponding to the motion video signal, a second multiplier detects an mount of motion of the motion video signal and executes multiplication so as to increase/decrease the difference signal from the subtracter in accordance with the amount of motion, an arithmetic unit subjects the increased/decreased difference signal from the second multiplier to addition/subtraction with the motion video signal, and a memory unit stores the noise-free motion video signal in a memory area and supplies to the subtracter as a 1-frame-preceding noise-free motion video signal.

REFERENCES:
patent: 4485403 (1984-11-01), Illetschko
patent: 4639784 (1987-01-01), Fling
patent: 5025316 (1991-06-01), Darby
patent: 5278638 (1994-01-01), Nakada et al.
patent: 5880791 (1999-03-01), De Haan et al.
patent: 1259823 (2000-07-01), None
patent: 03-240393 (1991-10-01), None
patent: 06-062283 (1994-03-01), None
patent: 9-23357 (1997-01-01), None
Peoples Republic Of China Office Action dated Dec. 22, 2006 for Appln. No. 200510069047.4.

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