Bandwidth reduction system for television signals

A bandwidth reduction system for television signals comprising static, intermediate and motion mode processor circuits for encoding the television signals and spatially filtering the horizontal and vertical resolution of the television signals, respectively, in dependence upon whether features in spatial areas of a television picture represented by the signals are static, moving at less than a predetermined rate, or moving at more than a predetermined rate, the processor circuits including decoding means for providing reconstituted television signals from the signals encoded and filtered thereby;

• a filter circuit for imposing spatial filtering on the horizontal and vertical resolution of the television signals substantially corresponding to that imposed by the static mode processor circuit;
• and a selection circuit for receiving the reconstituted television signals from the static, intermediate and motion mode processor circuits and the filtered signal from the filter circuit and for determining therefrom the static, intermediate or motion mode processor for imposition on the television signals to effect bandwidth reduction to the television signals in dependence upon the degrees of motion in the spatial areas of the television picture represented by the television signals.