VIDEO IMAGE SYNTHESIS ARITHMETIC PROCESSING UNIT, ITS METHOD AND SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a video image synthesis arithmetic processing unit that can asynchronously extract a synthesis image from a plurality of video signals which arrive asynchronously with a small time delay independently of input signals. SOLUTION: Each of frame memories writes line data of a plurality of video signals via line buffers 2A-2C, and the line data in each frame memory are read through each of read buffers 4A-4C at a point of a read time. An arithmetic section 5 applies an arithmetic operation of image synthesis for each pixel of image data of a plurality of the video image line data according to synthesis control instruction data corresponding to pixels read from a control memory 8. A receiver side receiving a plurality of source video images and control data can generate a synthesized video image or generate a synthesized video image in response to a request of a user by replacing part of the source video image with a video image of the user. By applying increase/decrease processing to address parts of a plurality of video signals, a synthesis image and a stereoscopic image that meet needs of a viewer can be generated in real time.