Television – Bandwidth reduction system – Data rate reduction
Patent
1995-09-22
1997-04-22
Chin, Tommy P.
Television
Bandwidth reduction system
Data rate reduction
348699, H04N 732
Patent
active
056233132
ABSTRACT:
Fractional pixel motion estimation of video signals is performed by comparing a block of pixels from a current image of the video signal with a plurality of displaced blocks within a search window from a previous/future reference image of the video signal via a distortion function. The displaced block from the reference image that produces the minimum value for the distortion function provides a center pixel. A general surface is fitted around this center pixel so that it equals the distortion function at each integer pixel location surrounding the center pixel. The distortion function for the fitted surface is estimated for fractional pixel locations, and the motion vector corresponding to the minimum value for the fractional distortion function is selected for transmission as part of the compressed video.
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Chin Tommy P.
Gray Francis I.
Lee Richard
Tektronix Inc.
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