公开(公告)号：EP0221743A3

公开(公告)日：1987-09-16

申请号：EP86308304

申请日：1986-10-24

申请人： MICRO SERVICES, INC

发明人： Chandler, Van S. ,  Arnstein, Robert A.

IPC分类号： H04N11/02 ,  H04N07/12

CPC分类号： H04N19/503 ,  H04N11/04

摘要： A method and system for compressing television video signals for digital transmission allows full motion pictures to be transmitted. The analog signal is digitized and stored in a memory (A) in consecutive pixel value locations. The values of the color components of each pixel value are summed and stored in a memory (B). In the second frame, the sum of each pixel value is compared with the sums stored in memory (B). If the difference is greater than a filter member, then that particular pixel is transmitted by the control computer (27). The total number transmitted for each frame is compared to a maximum allowable data rate, and the filter number is adjusted accordingly.