Recursive noise reduction for progressive scan displays

Details Recursive noise reduction for progressive scan displays Recursive noise reduction for progressive scan displays

1998-02-06

2000-09-26

Kelley, Chris S.

Television

Image signal processing circuitry specific to television

Motion dependent key signal generation or scene change...

H04N 700

Patent

active

061249009

ABSTRACT:
A method and structure for producing a noise reduced video signal. The data corresponding to a pixel in a first frame is differenced with signal corresponding to that pixel in a second frame. The difference signal is then recursively noise filtered, clipped and a non-linear function is applied. The filtered and clipped difference signal is then multiplied by the difference signal and added back into the original data. The resulting data is motion adapted and noise reduced, and is used in converting from interlace to progressive scan. The method can be integrated with scaling processes as well.

REFERENCES:
patent: 4500911 (1985-02-01), Ninomiya
patent: 5166788 (1992-11-01), Lee
patent: 5412436 (1995-05-01), Christopher
patent: 5574512 (1996-11-01), Saeger
patent: 5844617 (1998-12-01), Faroudja et al.

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