System for reducing the visibility of the noise in television pictures

A system for improving the signal-to-noise ratio in an incoming video signal, said system comprising first and second storage means for separately storing video signals for comparison with a later received incoming video signal, transmitting means for directly transmitting incoming video signals as they are received;

• first means jointly responsive to said video signals stored in said first storage means and to said later received incoming video signals for respectively developing output video signals, movement detector means including processing means responsive to said incoming video signal and to previous incoming video signals stored in said second storage means for developing multi-condition control signals and for utilizing internally developed difference signals for indicating the differences between a current incoming video signal point and its neighboring video signal points and the corresponding points of video signals stored in said second storage means, gating means responsive to said multi-condition control signals for selectively connecting either said incoming signal from said transmitting means or said output video signals from said first means to an output terminal and also to said first storage means, means included in said movement detector responsive to said difference signals relative to a predetermined threshold level for delivering binary signals to indicate whether said difference is above or below said threshold level, and logic circuit means also included in said movement detector means responsive to said binary signals and to at least one of said multi-condition control signals for providing said multi-condition control signals to said gating means.