Method for changing a reference block of a reference image, method for encoding or decoding a block of an image with the aid of a block of reference and, therefore,The device and medium or storage signal that conveys a block encoded with the aid of a reference block modified

摘要

The invention is related to a method for modifying a reference block (RFBL) of a reference image (I_REF). That is, the method comprises transforming (TRF) the reference block (RFBL) into a first set (REF(u,v,)) of coefficients, modifying the first set (REF(u,v,)) of coefficients by help of one or more weights (TR(u,v,)) and inverse transforming (ITR) the modified first set of coefficients wherein said weights (TR(u,v,)) are determined by help of one or more further pixels of the current image (I_CUR) and by help of one or more further reference pixels of the reference image (I_REF). Using further pixels of the current image as well as further reference pixels of the reference image allows spectral weights to be determined such that they reflect fading effects. Especially, if a reference frame consists of two cross-faded frames of which one shall be predicted by help of said reference frame, then, spectral domain weighting allows for separating the relevant of the two frames.