Television – Bandwidth reduction system – Data rate reduction
Patent
1996-10-28
1997-09-16
Britton, Howard W.
Television
Bandwidth reduction system
Data rate reduction
348699, H04N 732
Patent
active
056686005
ABSTRACT:
An apparatus, for use in an image signal encoding system, encodes a bidirectionally predictive frame (B frame) of a digital video signal to generate an encoded B frame signal. The apparatus selects two groups of pixels from pixels contained in a detected processing regions of a first and a second reference frames as a first and a second sets of feature points, respectively, by using a feature points selection circuit; and then determines a first set of motion vectors between the current and the first reference frames and a second set of motion vectors between the current and the second reference frames through the use of a feature point motion estimation circuit. Thereafter, the apparatus selects a set of motion vectors for the set of feature points from the first and the second sets of motion vectors to thereby generate a selected set of motion vectors and selection information representing the selected set as the encoded B frame.
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patent: 5546129 (1996-08-01), Lee
patent: 5579401 (1996-11-01), Gear
patent: 5581308 (1996-12-01), Lee
patent: 5592228 (1997-01-01), Dachiku et al.
patent: 5598216 (1997-01-01), Lee
Britton Howard W.
Daewoo Electronics Co. Ltd.
Din Luanne P.
LandOfFree
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