Patent ID: 7869514
Filing Date: 2011-01-11
Classification: H04N

Abstract:
1. A prediction image generation method for generating a prediction image by decoding 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 prediction image generation method comprising: receiving an input of encoded data obtained by encoding, for a to-be-decoded block, a given number of indices each 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; deriving, for the to-be-decoded block, the weighting factors and the offsets from the given number of indices respectively; and generating a prediction image by multiplying the luminance component and the first and second color difference components of a given number of reference images by the weighting factors corresponding to the respective reference images, respectively, and adding the given number of offsets, respectively, to results of the multiplying.