TEMPORAL SUB-SAMPLING DEVICE AND MOTION-COMPENSATED TIME INTERPOLATION IN INTERLACED IMAGE SEQUENCE, USE OF SUCH A DEVICE IN CODING AND DECODING DEVICES OF HIGH-DEFINITION TELEVISION IMAGE TRANSMISSION SYSTEM , AND DEVICES FOR ENCODING AND DECODING FOR SUCH A SYSTEM

摘要

P Device for temporal subsampling and temporal interpolation in an interlaced image sequence, comprising a spatial pre-filtering circuit of said sequence, respectively spatial and temporal subsampling circuits, and an estimation stage of movement. This device is applied to the realization of a coding device for transmission system, and to the realization of the corresponding decoding device, both of similar structure that is to say comprising the same number of processing branches controlled by a decision-making circuit relative to the processing branch to be selected. The various variants of motion-compensated coding devices can be supplemented by a direct temporal filtering circuit 1910 for eliminating residual defects such as jerks, as well as of course the associated decoding devices, supplemented by an inverse time filtering circuit. / P P Application: HDTV. / P