Time axis correction device for multiplex information-carrying signal obtained from recording medium
AssigneePioneer Video Corporation
InventorTakashi Okano
Life of this patent
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Abstract
A time axis correction device for a recording medium player such as a video disc player, which device corrects the time axis of at least one component signal of a plurality of component signals contained in a multiplex information-carrying signal which is picked up from a recording medium, in accordance with an error between a reference signal and a pilot signal separated from the multiplex information-carrying signal, so that the time axis correction operation is performed stably.
Claims5
A time axis correction device which corrects the time axis of an audio information-carrying component signal contained in a multiplex information-carrying signal which is read from a recording medium and further contains video information-carrying component signal with the standard horizontal synchronous pulse signal, which includes first separating means for separating said audio information-carrying component signal from said multiplex information-carrying signal, second separating means for separating said video information-carrying component signal from said multiplex information signal and for further separating said standard horizontal synchronous pulse signal from said video information-carrying signal, the time axis/correction device comprising:
- an adder for adding said audio information-carrying signal and said standard synchronous pulse signal;
- variable delay means for applying a delay to the added audio information-carrying and standard horizontal synchronous pulse signals, said delay being varied in accordance with a control signal;
- third separating means for separating the horizontal synchronous pulse signal from the added and delayed signals;
- error detecting means for detecting an amount of error in the time axis between a predetermined reference signal and the horizontal synchronous pulse signal from said third separating means;
- and
- control means for producing said control signal representative of the amount of error.
Dependencies are inferred from the claim text.