Methods and devices for coding and decoding images, computer program implementing them and information carrier enabling their implementation

摘要

A method of coding a digital image which includes plural macroblocks of which one is designated as a“current”macroblock. Motion estimation is applied to the current macroblock and to at least one image designated as“reference”, to obtain one or more first predictors in each reference image. A second predictor is obtained from a spatial scalability level lower than the spatial scalability level of the current macroblock. At least one of the first predictors is transformed from the spatial domain to the frequential domain. At least one low spatial frequency coefficient is predicted on the basis of the second predictor, and at least one high spatial frequency coefficient is predicted on the basis of at least one high frequency coefficient of the transformed first predictor.