Ghost detector with time reversal processing

A ghost detector comprising:

• wave detecting and band limiting means for performing synchronous detection on a received video signal to provide a detected signal which is converted to a band-limited signal having a predetermined bandwidth;
• switching control signal output means for extracting a scanning synchronous component signal from the detected signal to provide a switching control signal for a ghost component detecting period on the basis of the synchronous component signal;
• switching means, supplied with the band-limited signal, for switching on the band-limited signal in response to the switching control signal so as to provide a switching signal;
• memory means for broadening the bandwidth of the switching signal while providing a time-compressed processing signal by a write/read operation for the switching signal on the basis of a predetermined control signal;
• time reversing means for performing time reversal on the processing signal in an order reverse to the order of writing/reading the processing signal to provide a time-reversed signal;
• delay means for providing a delay signal that is obtained by delaying the processing signal by the period of the time reversal;
• amplitude modulation means for amplitude modulating the time-reversed signal and the delay signal by a predetermined carrier component signal to produce associated amplitude modulated signals;
• and
• correlation signal output means, supplied with the respective amplitude modulated signals, for providing a correlation signal that contains a significant waveform representing a ghost component of the received video signal.