基于MB90092的视频字符叠加系统设计

摘要

In order to satisfy a certain vehicle product's demand of overlaying characters, this paper introduces the structure design based on MB90092 and gives the hardware circuit design and software programming of the system after analyzing the fundamental of video display metafile and several schemes of OSD system. The application results show that the system is stable and reliable. Given its good synergistic effect, the system can be used for engineering applications.%为了满足某型车载产品对于操控终端叠加字符信息的需求,根据视频字符叠加基本原理,分析了几种字符叠加方案,提出一种基于字符叠加芯片MB90092的字符叠加系统设计,并给出该系统的硬件电路设计及其软件编程.实验室运行结果表明,该系统运行稳定,可以将指定字符信息叠加于指定位置,且叠加内容根据需求可快速更换,可以用于工程应用.