CODING SYSTEM FOR DIGITAL SIGNALS CORRESPONDING TO TELEVISION PICTURES AND CORRESPONDING DECODING SYSTEM

摘要

A coding system for digital signals corresponding to television pictures of a determined definition, incorporating an image rebuilding stage comprising a first image rebuilding channel according to said determined definition and a second image rebuilding channel according to a reduced definition, which is parallel on said first channel, and corresponding decoding system also incorporating an image rebuilding stage giving said reduced definition from decoded signals, associated with a decoding stage, a motion compensating stage using additional motion information, and a prediction stage using the output signals of said image rebuilding stage. This system is for use on television receivers.