Video encoding/ decoding method and apparatus
OwnerTakeshi Chujoh, Shinichiro Koto +1inventors
InventorsTakeshi Chujoh, Shinichiro Koto, Yoshihiro Kikuchi
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Abstract
A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.
Claims1
A prediction image generation apparatus of generating a prediction image by decoding encoded data obtained by subjecting a video image comprising a luminance and two color differences to prediction encoding, comprising:
- means of receiving an input of encoded data obtained by encoding, for a to-be-decoded block, a given number of indices indicating a combination comprising (A) a weighting factor every luminance and two color differences and (B) an offset every luminance and two color differences respectively;
- means of deriving, for a to-be-decoded block, the weighting factors and the offsets from the given number of indices respectively;
- and
- means of generating a prediction image by multiplying a given number of reference images by the weighting factors corresponding to the respective reference images and adding the given number of offsets.
Dependencies are inferred from the claim text.