Television – Image signal processing circuitry specific to television – Motion vector generation
Patent
1996-06-24
1998-12-08
Britton, Howard
Television
Image signal processing circuitry specific to television
Motion vector generation
341 67, 341106, 3582611, 382236, 382245, 382246, H04N 736
Patent
active
058477764
ABSTRACT:
A novel method of improving the motion estimation and coding efficiency of Interframes in a video compression system is disclosed. The method teaches a novel minimization function to be used to determine the optimum motion vector for a block within a picture. The minization function takes into account not just the conventional sum of the differences but also the quantization step, the motion vector itself and the predicted motion vector. The minimization function disclosed better balances the tradeoff between the size of the motion vectors and the size of the resulting residuals. The results are particularly useful when the range of the search is increased. Motion vectors closer to the prediction motion vector will be favored over better matches found further away from the prediction motion vector. In addition, a novel variable length coding (VLC) method is also disclosed. The disclosed encoding method is able to code numbers having a range double that of conventional VLC tables but with a very small penalty in increased bit length.
REFERENCES:
patent: 5317397 (1994-05-01), Odaka
patent: 5424779 (1995-06-01), Odaka
Khmelnitsky Alex
Taits Eugene
Britton Howard
VDOnet Corporation Ltd.
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