FIELD: television engineering. SUBSTANCE: device has series-connected high-frequency filter, electronic switch, and low-frequency filter, as well as video signal rise time detecting unit whose input is connected to output of low-frequency filter and output, to control input of electronic switch. Device responds to any increase in rate of change of video-signal rise time by suppressing noise in video signal. EFFECT: improved reliability of noise suppression in video signal. 10 cl, 21 dwg
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