视频编码电路主要实现接收8位CCIR656格式的YUV数据，（例如MPEG解码数据），并编码成亮度Y和色度信号C，以及合成CVBS信号，经过D/A转换后输出。基本的编码功能包括副载波产生，色差信号调制，同步信号内插。

主要应用在视频处理，军事图像处理。

GM7221设计原理图-Video encoding circuit main reception 8 CCIR656 format YUV data (such as MPEG decoding the data), and encoded into the brightness Y and chroma signal C, as well as the synthesis of CVBS signal, through D/A conversion output. Basic coding features include sub-carrier generation, color signal modulation, synchronization signal interpolation. Mainly used in video processing, and military image processing. GM7221 design schematics