Patent ID: 7376186
Filing Date: 2008-05-20
Classification: H04N

Abstract:
1. A method for encoding video signal data for an image block, the method comprising: receiving a substantially uncompressed image block; assigning a weighting factor for the image block corresponding to a particular reference picture; weighting the reference picture by the weighting factor; computing motion vectors corresponding to the difference between the image block and the weighted reference picture; and motion compensating the weighted reference picture in correspondence with the motion vectors; wherein bi-predictive picture predictors are used, and the method further comprises: assigning a second weighting factor for the image block corresponding to a second particular reference picture; weighting the second reference picture by the second weighting factor; computing second motion vectors corresponding to the difference between the image block and the second weighted reference picture; and motion compensating the second weighted reference picture in correspondence with the second motion vectors.