基于FPGA的视频图像画面分割器的设计

Design of Screen-divider Device for Video Based on FPGA

在基于FPGA的视频图像画面分割器设计中,首先将多路模拟视频信号经过视频解码芯片SAA7113转换成CCIR656个格式数字信号;然后按照分割画面分割的要求由FPGA对有效信号进行抽取并存储到SRAM中,再将抽取的信号进行帧合成;最后经过SAA7121视频编码芯片把处理过的信号转换成模拟信号输出到显示器,实现在一个屏幕显示多路视频画面的目的。

In the design of screen - divider device for video based on FPGA. First,covert the analog video signal from several channels into format CCIR656 digital signal through SAA7113 video decoder. According to the request of screen divider, FPGA extracts the active signals which needed,saves up them in the SRAM,and synthesizes them into new frames. Then the SAA7121 video encoder coverts the processed signals into analog signals output to the screen, displaying several images in screen.