| 摘要 |
IN ORDER THAT SUCH A SIGNAL AS IS CONVENTIONALLY DETERMINED TO BE A STANDARD SIGNAL IN THE UNIT OF ONE FIELD AND DETERMINED TO BE A NON-STANDARD SIGNAL IN THE UNIT OF A PLURALITY OF FIELDS CAN BE DETERMINED TO BE A NON-STANDARD SIGNAL, THE FOLLOWING ARE PROVIDED: A CLOCK GENERATING CIRCUIT (102)FOR GENERATING A CLOCK OF A FREQUENCY BEING A CONSTANT MULTIPLE OF THE COLOR CARRIER FREQUENCY; A REGISTER FOR SETTING THE CLOCK COUMT OF ONE FIELD SECTION OF A STANDARD SIGNAL; A VERTICAL COUNTER(105) FOR COUNTING THE NUMBER OF CLOCKS GENERATED BY THE CLOCK GENERATING CIRCUIT(102), AND BEING RESET WHEN THE CLOCK COUNT REACHES THE VALUE OF THE REGISTER; AND A FLIP-FLOP RECEIVING THE COUNTER OUTPUT AS THE INPUT AND USING AN EXTERNAL VERTICAL SYNCHRONIZING SIGNAL (S2)AS A LOAD HOLD PULSE. CONSEQUENTLY, THE OUTPUT OF THE FLIP-FLOP REPRESENTS THE INTER-FIELD SHIFT OF THE CLOCK COUNT REPRESENTED BY THE EXTERNAL VERTICAL SYNCHRONIZING SIGNAL(S2) FROM THE STANDARD SIGNAL WHICH SHIFT IS ACCUMULATED OVER A PLURALITY OF FIELDS, SO THAT EVEN SUCH A SIGNAL AS IS CONVENTIONALLY DETERMINED TO BE A STANDARD SIGNAL IN THE UNIT OF ONE FIELD AND DETERMINED TO BE A NON-STANDARD SIGNAL IN THE UNIT OF A PLURALITY OF FIELDS CAN BE DETERMINED TO BE A NON-STANDARD SIGNAL.
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