Abstract 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.
A device for recording and reproducing a video signal, comprising means for converting an incoming video signal into a plurality of signal channels, a plurality of magnetic heads for recording and reproducing said signal channels in association with a magnetic tape, first means for superimposing a pulse-like signal in the vicinity of the back porch of the incoming video signal, means for reconverting the plurality of signal channels to provide a reproduced video signal, second means for separating the superimposed pulse-like signal from the reproduced video signal, generator means for providing a horizontal synchronizing signal to be added to the reproduced video signal, third means for detecting relative phase fluctuation between the separated pulse-like signal and the horizontal synchronizing signal, and fourth means for controlling the phase of said horizontal synchronizing signal by the output of said third means and adding the horizontal synchronizing signal to said reproduced video signal.
Claim 2
Independent Claim
150 words
A device for recording and reproducing a video signal, comprising means for converting an incoming video signal into a plurality of signal channels, a plurality of magnetic heads for recording and reproducing said signal channels in association with a magnetic tape, first means for superimposing a pulse-like signal in the vicinity of the back porch of the incoming video signal, means for reconverting the plurality of signal channels to provide a reproduced video signal, second means for separating the superimposed pulse-like signal from the reproduced video signal, generator means for providing a horizontal synchronizing signal to be added to the reproduced video signal, third means for detecting relative phase fluctuation between the separated pulse-like signal and the horizontal synchronizing signal, and fourth means for controlling the phase of said horizontal synchronizing signal by the output of said third means and adding the horizontal synchronizing signal to said reproduced video signal.
Claim 3
Dependent Claim
30 words
A picture recording and reproducing device as claimed in claim 1, comprising a low pass filter for supplying the phase fluctuation output of said third means to said fourth means.