一种多路视频信号分时远距离传输方法的实现  

Multi-channel video signal with long distance and time division transmission

作　　者：罗旭[1] 廉小亲[1] 王涛[1] 李康飞 张晓力[1] 段振刚[1] 

机构地区：[1]北京工商大学计算机与信息工程学院,北京100048

出　　处：《电子技术应用》2015年第3期158-160,164,共4页Application of Electronic Technique

基　　金：北京市自然基金重点项目B类(KZ201410011014)

摘　　要：研究复用一根电缆分时传输多路视频信号的方法,设计多路视频分时传输系统,用于一台主控设备对多个对象进行视频监控。阐述了系统的硬件组成及原理,给出了视频发射/接收及电子开关电路的设计思路,制定了主控计算机和多路微控制器S TC15F2K61S2的通信协议,给出了微控制器软件设计思路。测试结果表明,系统采用差分双绞线驱动器传输视频信号,结合对多路电子开关的控制,实现了多路视频信号有效的通断,进而实现了多路视频信号复用双绞线远距离传输,实际传输效果清晰,信号波形无失真。Multi-channel video signal transmission method is designed with time division and long distance using a single cable in this paper. This method can be used to initiate a video surveillance to multiple objects by one device. It describes the hardware composition and its theory of the system,shows the idea of video signal transmitter/receiver through electronic switching circuit, and developes a communication protocol between host computer and microchip STC15F2K61S2.According to the actual effect and signal waveform observations,the system uses a differential twisted pair drive transmission of video signals,combined with multichannel electronic switch,to achieve a good feasibility in signal on or off and its transmission without distortion.

关 键 词：多路视频传输 分时复用 差分双绞线驱动器 485总线 电子开关 

分 类 号：TP273.5[自动化与计算机技术—检测技术与自动化装置]