| 摘要 |
<p>The interference pulses reach a TV receiver together with synchronisation pulses. The receiver has a flip-flop(KS) synchronised by the received colour picture blanking synchronisation signal(F)(BAS). Its cycle periods are only a little shorter than the normal pulse duration of the colour picture blanking signal. An interference detector(SD) monitors this signal during periods of picture signal transmission, and/or during synchronisation pulses, for presence of interferences which could upset the synchronisation. In case of their presence, individual replacement synchronisation pulses, controlled by the flip-flop(KS) together with a control unit(ST), are applied to the amplitude filter(AS) input.</p> |
