Video signal display system

An image display system, comprising:

• a video signal output device for outputting a video signal;
• and
• an image display device for receiving and displaying the video signal, wherein:
• said video signal output device comprises:
• a basic signal group generating means for generating a sync signal, and the video signal which indicates display values of pixels at positions decided in each interval by time difference between said interval and said sync signal;
• a signal generating means for generating a prescribed transmission signal to be transmitted to said display device, other than a horizontal sync signal or a vertical sync signal;
• a superposing means for superposing said transmission signal on said sync signal to generate a second sync signal;
• and
• an output means for outputting said second sync signal and said video signal to said display device, and,
• said image display device comprises:
• an isolating means for isolating, from the inputted second sync signal, said transmission signal and said sync signal superposed in said second sync signal;
• a processing means for processing the isolated transmission signal;
• and
• a display means for displaying the display values indicated in each interval by the inputted video signal, said display values being displayed at pixels at positions decided by time difference between said interval and said isolated sync signal.

A display device to which a sync signal and a video signal are inputted and which displays the video signal, comprising:

• an isolating means for isolating, from a second sync signal inputted to the isolating means, a prescribed transmission signal and the sync signal superposed on said second sync signal, said transmission signal being other than a horizontal sync signal and a vertical sync signal;
• a processing means for processing the isolated transmission signal;
• and
• a display means for displaying display values indicated in each interval by the video signal inputted to the display means, said values being displayed at pixels at positions decided in accordance with time difference between said interval and said isolated sync signal.