Patent ID: 7889797
Filing Date: 2011-02-15
Classification: H04N

Abstract:
1. A prediction image generating apparatus of decoding encoded data obtained by subjecting a video image to predictive encoding, the video image having a luminance component and first and second color difference components, the apparatus comprising: a receiver configured to receive encoded data obtained by encoding, for a to-be-decoded block, an index indicating (A) a reference image, and (B) a combination selected from a plurality of combinations, each combination comprising (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; a deriving module configured to derive, for the to-be-decoded block, (A) weighting factors for the luminance and color difference components and (B) the offsets for the luminance and color difference components from the index; and a generator configured to generate a prediction image for the to-be-decoded block by multiplying the luminance and the first and second color difference components of the reference image by the weighting factors, respectively, and adding the offsets, respectively, to results of the multiplying.