| 摘要 |
<p>An apparatus for reducing the effect of co-channel interference on horizontal synchronization is provided in the television receiver. The receiver has a comb filter (33) for separating luminance and chrominance signals from a composite video signal and a synchronizing pulse separator (43), coupled to the comb filter output, for deriving synchronizing pulses from the comb filter luminance signal. The co-channel interference beat frequency signals are reduced in amplitude by the comb filter and hence do not disrupt the operation of the synchronizing pulse separator. The separator (43) coupled to the comb filter (33) may be for horizontal synchronizing pulses only, a separate vertical synchronizing pulse separator being coupled to the output of the I.F. stage.</p> |
