Patent ID: 6909468

Claim:
A positional difference correcting apparatus between two-route videos comprising: first variable delay means in which a received video of a first route is inputted and second variable delay means in which a received video of a second route is inputted; frame memories, line memories and pixel memories, which are connected to each of the first and second variable delay means, comparing means to compare a frame delay video, a line delay video and a pixel delay video, which are delayed by the frame memories, the line memories and the pixel memories, between the first and second routes; and correcting control signal generating means to generate a control signal for correcting a delay difference, which is obtained by the comparing means; wherein a signal obtained by the correcting control signal generating means is provided to the first or the second variable delay means so as to correct the delay difference by repeated processing including when an original amount of the delay difference is larger than a frame delay.