Video noise reduction apparatus and method using three...

Details Video noise reduction apparatus and method using three... Video noise reduction apparatus and method using three...

H - Electricity

04

N

H04N 7/00 (2006.01) H04N 5/21 (2006.01) H04N 7/26 (2006.01) H04N 7/30 (2006.01)

Patent

CA 2118978

ABSTRACT A noise component of a video signal is reduced by using a three dimensional discrete cosign transform (3-D DCT) to determine the time frequency spectrum of both the video signal and the noise component, subtracting the time frequency spectrum of the noise component from the time frequency spectrum of the video signal, and converting the time frequency spectrum of the modified video signal back to the spatial time domain by using an inverse 3-D DCT.

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