| 摘要 |
A system for recording and reproducing a video signal, includes a converter for converting an incoming video signal into a number of signal channels, and a corresponding number of magnetic heads for recording and reproducing the signal channels in association with a magnetic tape. A circuit superimposes a pulse signal in the vicinity of the back porch of the incoming video signal prior to its conversion, and reconverting circuitry operates to reconvert the signal channels and combine them to provide a reproduced video signal. The superimposed pulse is separated from the reproduced video signal by appropriate circuitry, and the relative phase fluctuation between the separated pulse and a horizontal synchronizing signal to be added to the reproduced video signal is detected. Additional circuitry serves to control the phase of the horizontal synchronizing signal in accordance with the detected relative phase fluctuation, and to add the horizontal sychronizing signal to the reproduced video signal to provide a video signal output.
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