【摘要】 为了解决多路监控系统中特征字符及图形的叠加问题 ,研制出一种实用的 16通道视频字符及图形叠加系统 ,该系统以 89C51单片机为核心 ,控制各视频通道实时叠加相应字符 .本文详细地介绍了其硬件原理及软件构成 .同时也对该系统的进一步扩充提出了一些措施和方案 .经实际应用 ,该系统叠加稳定 ,性能可靠 ,有实用价值 .更多还原

【Abstract】 In order to overlay the special characters and image for multiple video channels, a video signal characters and image overlay system with 16 channels is introduced.It uses the 89C51 single chip computer as its core to control respective video channels. Its hardware circuitry and software construction are described in detail. Some suggestions for extensive usages are also proposed. It is proved by practical application that this system is steady and reliable.更多还原