Video signal detecting apparatus

Details Video signal detecting apparatus Video signal detecting apparatus

1995-02-06

1998-05-12

Peng, John K.

Television

Synchronization

Control of picture position

348500, H04N 504

Patent

active

057513678

ABSTRACT:
A video signal is inputted into a video signal detecting apparatus including one monostable multivibrator to latch in response to a rise of the video signal, and the other monostable multivibrator to latch in response to a fall of the video signal. Output from the multivibrators are ORed in an OR circuit which outputs the OR output as a video detecting signal. A control logic circuit adjusts an image position, image widths and so forth on a display screen depending upon the video detecting signal and horizontal and vertical synchronizing signals.

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