FANTASY SIGNAL DETECTOR SYSTEM WITH PHASE ADJUSTMENT OF CHROMINANCE SUB-CARRIER SYNCHRONIZATION COMPONENT

摘要

The invention relates to a system for detecting dark signals in a television with a source of video signals that can be contaminated by false signals, which video signals include an interval that can be used as a training signal interval, containing a component. SYNCHRONIZATION METHOD OF CHROMINANCE SUB-CARRIER. / P P ACCORDING TO THE INVENTION, IT INCLUDES A VARIABLE DELAY LINE 12, A MEAN 18 CONNECTED TO LINE 12 TO CONTROL ITS DELAY; A TORQUE 10 AT THE ENTRY OF THE LINE TO APPLY THE VIDEO SIGNALS DURING THE INTERVAL OF TRAINING SIGNALS; AND A FOLLOWING CIRCUIT 30 HAVING INPUTS COUPLED AT THE INPUT AND OUTPUT OF THE LINE AND A COUPLED OUTPUT BY MEANS OF CHECKING, RESPONSIBLE FOR THE APPEARANCE OF A DELAYED SIGNAL OF SYNCHRONIZATION OF THE CHROMINANCE SUB-CARRIER TO THE OUTPUT OF THE LINE AND THE APPEARANCE OF A PHANTOM OF THIS SIGNAL AT THE INPUT OF THE LINE TO CONTROL THE DELAY IN RESPONSE TO THE PHASE RELATIONSHIP BETWEEN THE DELAYED SIGNAL AND ITS GHOST. / P P INVENTION APPLIES NOTABLY TO TELEVISION. / P