Circuitry, which disables the color decoding process in TV sets when a black and white transmission is received. The color killer circuitry looks for a color burst signal, and when it detects that the color burst is absent (as in black and white transmissions) color decoding circuitry is disabled. The circuitry was added to TV sets in order to improve the quality of black and white images, because the attempts of the TV to detect color information in a B&,W signal result in artificial, disturbing color fringes and noise.
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