采用字符视频叠加芯片，实现图形与字符数字叠加显示功能。-Video overlay in character, chip, digital overlay of graphics and character display.

YUV420 上进行字符叠加程序源码，可用于视频解码后的OSD叠加，非常方便。

JPEG文件字符叠加，特别是中文字符OSD对于JPG图像来说是一个难题，本软件全面实现了叠加功能-JPEG file OSD, especially Chinese character OSD is a problem for JPG images, the full realization of this software overlay function