Method for coding and reconstructing a pixel block using a causal neigborhood of the block for adjusting the transform function of the block residual

摘要

The invention relates to a method for coding a block of pixels comprising the following steps:- calculate (100) a block of residues from the pixel block and a prediction block,- transform (104) the block of residues into a block of coefficients with a transform defined by a set of basis functions,- code (106) the block of coefficients,;The method comprises, before the transformation step (104), a step (102) for rephasing basis functions from residues calculated in a causal neighbourhood of the pixel block. The transformation step uses the rephased basis functions.