Patent ID: 7852931
Filing Date: 2010-12-14
Classification: H04N

Abstract:
1. A prediction image generation apparatus of generating a prediction image from encoded data obtained by subjecting a video image to prediction encoding, the video image having a luminance component and, first and second color difference components, the apparatus comprising: a receiver configured to receive an input of encoded data obtained by encoding, for a to-be-decoded block, (1) an index indicating a combination comprising (A) a first weighting factor for the luminance component, (B) a second weighting factor for the first color difference component, (C) a third weighting factor for the second color difference component, (D) a first offset for the luminance component, (E) a second offset for the first color difference component, and (F) a third offset for the second color difference component, and (2) information of a motion vector; a deriving module configured to derive, for the to-be-decoded block, the weighting factor and the offset from the index; and a generator configured to generate a prediction image by multiplying the luminance component and the first and second color difference components of a reference image respectively by the weighting factors and adding the offsets, respectively, to results of the multiplying, based on the motion vector.