Video signal reproducing apparatus with H sync discontinuity correction
AssigneeCanon Kabushiki Kaisha
InventorSomei Kawasaki
Life of this patent
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Abstract
A video signal reproducing apparatus is provided with delay means for changing to a given degree at a time the phase of a reproduced horizontal synchronizing signal included in a reproduced video signal which is taken out from a recording medium. When the reproduced horizontal synchronizing signal becomes discontinuous, the discontinuous signal is replaced with the output signal of the delay means until the phase of the output signal comes to coincide with the phase of the reproduced horizontal synchronizing signal. The delay means includes a delay line which delays the horizontal synchronizing signal for one horizontal scanning period and a delay circuit which is arranged to further delay for a short period of time the signal delayed and produced from the delay line.
Claims16
A video signal processing device comprising:
- (a) separating means for receiving said video signal and for separating a horizontal synchronizing signal from said video signal;
- (b) delay means for receiving and delaying such separated horizontal synchronizing signal, said delay means including
- (1) a first circuit for delaying said separated horizontal synchronizing signal for one horizontal scanning period and for generating an output signal indicative thereof, and
- (2) a second circuit for receiving said first circuit output signal and for delaying such received signal for a period of time shorter than one horizontal scanning period and generating an output signal indicative thereof;
- and
- (c) output means for furnishing said video signal selectively with said second circuit output signal during a predetermined time period.
A video signal processing device comprising:
- (a) separating means for receiving said video signal and for separating a synchronizing signal from said video signal;
- (b) delay means for receiving and delaying an incoming signal for a predetermined period;
- and
- (c) switching means for selectively supplying said delay means with either said separated synchronizing signal or with said video signal.
A video signal processing device comprising:
- (a) separting means for receiving said video signal and for separating a horizontal sychronizing signal from said video signal;
- (b) delay means for receiving and delaying said separated horizontal synchronizing signal for a predetermined period of time;
- and
- (c) means for supplying such delayed separated horizontal synchronizing signal with said video signal during a predetermined time period.
Dependencies are inferred from the claim text.