Vertical synchronizing signal generation appts. and video signal processing appts.
A vertical synchronization signal and generation device technology, applied in the field of signal processing, can solve the problems of discontinuous synchronization signal interval and synchronization confusion
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[0062] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[0063] (first embodiment)
[0064] FIG. 1 is a block diagram showing the configuration of a vertical synchronizing signal generator according to a first embodiment of the present invention. The vertical synchronization signal generating device 10 in FIG.
[0065] The luminance signal input to the vertical synchronous signal generator 10 of FIG. 1 is a signal separated from the image signal of the NTSC (national television system committee (International Television System Committee)) mode, and the clock pulse of the frequency fs is input into the vertical synchronous signal Separation circuit 11 , AFC circuit 20 , vertical synchronization signal phase detection circuit 30 and selector 12 .
[0066]The vertical synchronous signal separation circuit 11 separates the first vertical synchronous signal VS superimposed on the input luminance signal during its ve...
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