Digital video signal output device and display device, and digital video signal output method and reception method

A digital video display device for displaying a video picture based on a digital video input signal inputted via a transmission interface having a predefined upper limit on its data transmission rate, the digital video display device comprising:

• a receiver configured to
• receive a digital video input signal in which data for a cutout image being a rectangular area that is a portion of the entire image in a single frame of a digital video signal has been transmitted during a video-data period thereof, 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,
• acquire data for the cutout image from the received signal,
• acquire cutout-area information specifying at least the rectangular area's position within the entire image transmitted during a blanking period of the digital video input signal, and
• acquire, from the digital video input signal, timing information representing a point when the cutout image is to be displayed;
• an image restorer configured to restore an entire image for a single frame and to generate a for-display video signal, based on the data for the cutout image and on the cutout-area information;
• and
• a display section configured to display a picture based on the for-display video signal.