论文部分内容阅读
所谓扫描同步是指图像发送端和接收端的扫描应有一一对应的几何位置,实际上只要扫描频率相同,扫描起始位置相同(相位相同)就达到了扫描同步。就可以在收端重现发端的图像。如果不同步将使重现图像产生畸变,甚至不能重现原图像。为此在发端图像信号中,加入同步脉冲即在发端每扫完一行时加入一个行同步脉冲(SH),每扫完一场时加入一个场同步脉冲(SV) ,它们和图像信号一齐传送到收端,收端的扫描
The so-called scanning synchronization refers to the image sending and receiving end of the scan should correspond to the geometric position, in fact, as long as the same scanning frequency, scanning the same starting position (phase) to achieve the scanning synchronization. It is possible to reproduce the originating image at the close end. If you do not synchronize will reproduce the image distorted, or even can not reproduce the original image. For this purpose, a sync pulse (SH) is added to the start image signal by adding a sync pulse (SH) at each end of a line, and a field sync pulse (SV) is added every time a field is swept, which is transmitted together with the video signal Close end, close the end of the scan