Patent ID: 7768576

Claim:
A multi-screen synthesis apparatus comprising: a writing unit that writes video data and OSD image data into a memory; a reading unit that reads the video data and the OSD image data from the memory, based on layout information; a display control unit that synthesizes and displays the video data and the OSD image data on a display unit; a frame decimation unit that decimates frames of the video data to be written into the memory; a control unit that controls decimation of the frame of the video data to be written into the memory; and a display priority-determining unit that determines display priority of the video data based on the layout information, wherein said control unit controls said frame decimation unit to decimate the frames of the input video data determined by said display priority-determined unit to be lower in display priority, during periods of the drawing of the OSD image is being carried out, in the case that a number of screens to be displayed on said display unit exceeds a predetermined number.