Multiscreen display circuit for displaying video signal sources having different aspect ratios

摘要

The present invention sequentially selects and outputs one of a plurality of video image sources 1 by an image signal source switching means 2, processes the video images by thinning circuit portions 3 and 4, writes in the video data into an image memory 5 and display the images on an image display device 6. Depending upon the detection output of an aspect ratio detecting circuit portion 12, which detects an aspect ratio of an image display of each of the video image source 1, thinning ratios of the thinning circuits 3 and 4 and a write in control circuit portion 9 for the image memory are switched in order to obtain a multiscreen display circuit which can display video signal sources having different aspect ratios.