Patent ID: 9319658
Filing Date: 2016-04-19
CPC Classification: G09G,H04N

Claim Text:
1. A digital video signal output device for outputting a digital video output signal to an external digital video display device via a transmission interface having a predefined upper limit on its data transmission rate, the digital video signal output device comprising: a difference detector configured to detect, as a cutout image, a rectangular area that is a portion of the entire image in a single frame of a digital video signal, the image in the rectangular area including a zone where a difference between the entire image in a single frame of the digital video signal and the entire image one frame previous to said frame has occurred, and configured to output cutout-area information specifying at least the rectangular area's position within the entire image; and a transmitter configured to output a digital video output signal by transmitting, during a video-data period, data representing the cutout image and transmitting, during a blanking period, the cutout-area information and timing information representing a point when the cutout image is to be displayed.