Patent ID: 7379604

Claim:
Device for coding video images by motion compensation comprising a coder comprising: means of storage of at least one input image, motion estimation means, designed to produce motion vectors and quantities representative of motion-compensated image variations, on the basis of a current input image and of at least said input image stored previously in said means of storage, means of calculation of a motion-compensated image on the basis of a filtered image and of said motion vectors, means of calculation of a prediction error, between said current input image and said motion-compensated image, means of calculation of a recursivity coefficient, first means of filtering, intended to produce a weighting of said prediction error by a modified recursivity coefficient, second means of filtering, intended to add the content of said motion-compensated image to the prediction error weighted by said modified recursivity coefficient when said input image is an image coded as intra type, and means of estimation of at least one noise level as a function of at least said quantities representative of motion-compensated image variations wherein: said recursivity coefficient is calculated as a function of said noise level and of said prediction error, said coding device comprises: means of measurement of the intra-image correlation, means of measurement of the inter-image correlation, and means of selection of an image coding type applied to said current input image as a function of at least the measurements performed by the means of measurement of the inter-image correlation and the means of measurement of the intra-image correlation and as a function of said estimated noise level, and the means of filtering and the coder of a motion-compensated image are dependent on said image coding type selected by said means of selection.