Reducing the composite triple beats impairment in cable television pictures

Two major impairments which affect the cable television picture quality are the thermal noise and the composite triple bears (CTB). We introduce a novel CTB reducing scheme which reduces the visual effect of the CTB significantly. This in turn allows cable operators to boost the signal levels so as to reduce thermal noise, thus improving the picture quality of their cable systems. The CTB reducing scheme consists of an intraframe and an inter-frame filter. Each of these filters exploits the differences in the characteristics between the CTB and the non-noisy pictures. The CTB reducer may be installed in a TV set-top convertor or inside the TV set