客运专线变电所远程视频监控通信方案设计

Key Technologies of Video Communication in Remote Video Monitoring System of Substation

针对客运专线中牵引供电系统的实际情况,对视频通道结构和视频信息的差错控制两方面的通信技术进行详细的讨论。设计了应用最多的基于E1口通道的视频通信的方案,并解决了视频调度和视频分配的难点;分析MJPEG,MPEG1和H 263等适合牵引供电系统的几种视频编码方法;讨论解码端的几种差错控制方法,在一定程度上提高视频信号的可靠性。实验表明,该视频监控系统具有较强的通道适应性和抗干扰能力,特别适合铁路变电所的远程视频监控。

Video communication channels and error control of video information are discussed in detail according to the practical situations of traction power system. E1-based video communication network is designed, the difficulties of video control and video distribution are solved; Several video coding methods suitable to the traction power system, such as M-JPEG, MPEG-1 and H.263 are analyzed. Error control and resilient methods, such as error detection and error concealment in decoding program are also discussed to improve the reliability of video signals. It is proved by experiments that the RVMS, which has high adaptability to communication channel and high anti-interference ability, is especially suitable to remote video monitoring of traction substations.