Muting circuit for a television receiver

Apparatus for muting signals transmitted over a relatively low frequency transmission path in a television receiver of the type having channel selector means for producing a channel select signal to select a corresponding one of a plurality of presettable channels and tuning means responsive to said channel select signal to tune said television receiver to said corresponding channel, said apparatus comprising means for providing a predetermined channel select signal when a predetermined channel is selected;

• detecting means for producing an output signal when the presence of a video signal at said television receiver is detected irrespective of the particular channel to which said television receiver is tuned;
• muting signal generating means conditioned when said predetermined channel select signal is provided so as to respond to the absence of said output signal to produce a muting signal;
• and a muting circuit coupled to said relatively low frequency transmission path and operative in response to said muting signal to attenuate the signals transmitted thereover.