本文运用视频字符叠加和红外无线传输技术，设计了一个激光测距仪辅助系统。
By using technique of character-overlapping and the theory of infrared wireless transmission, a system that can enhance the Laser Range Finder system's function is developed in this dissertation.
系统利用单片机定时控制，实现语音信号的红外无线传输，满足现代交互式教学需求。
Single chip machine is used for timing control in the system, infrared wireless transmission of voice signals is realized, and the demand in modern interactive teaching is satisfied.
本文给出了系统方案设计、各个部分电路原理及主要的子程序，从而完成了视频字符叠加与红外无线传输的系统。
The scheme design of the system, the circuit basis of each part and the key programs are described in this dissertation, the whole character-overlapping and wireless transmission system is fulfilled.
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