公开(公告)号：US5365276A

公开(公告)日：1994-11-15

申请号：US894922

申请日：1992-06-08

申请人： Kiyoshi Imai ,  Yutaka Nio ,  Ken Sakamoto ,  Keiya Miyoshi ,  Mitsuji Okawa ,  Toyoaki Unemura

发明人： Kiyoshi Imai ,  Yutaka Nio ,  Ken Sakamoto ,  Keiya Miyoshi ,  Mitsuji Okawa ,  Toyoaki Unemura

IPC分类号： H04N5/45 ,  H04N5/46 ,  H04N5/262 ,  H04N5/445

CPC分类号： H04N7/0122

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.

摘要翻译： 本发明通过图像信号源切换装置2顺序选择并输出多个视频图像源1中的一个，通过细化电路部分3和4处理视频图像，将视频数据写入图像存储器5并显示 图像显示装置6上的图像。根据高宽比检测电路部分12的检测输出，其检测每个视频图像源1的图像显示的宽高比，稀疏电路3和4的稀疏比和 切换用于图像存储器的写入控制电路部分9，以便获得可以显示具有不同纵横比的视频信号源的多画面显示电路。