轨道交通乘客信息系统(passenger information system,PIS)是以通信和多媒体技术为基础,基于多种显示终端为乘客提供全方位、多场景的信息服务系统.针对目前轨道交通乘客信息系统面临的硬件投资过剩、部署调试效率低、播控传输链路长、可靠性差的弊端,提出"系统入云、播控入屏"的新一代乘客信息系统的云播控技术架构,详细阐述云播控架构通过变革传统音视频传输方式带来的技术优势,并分析多显示终端画面难以同步的问题.研究结果表明,云播控技术可以减少50％的故障节点,有效提高部署调试效率,实现集约化建设的目标,并能够针对乘客从进站到出站的出行全链路进行多种个性化场景的应用支撑.
Cloud Play-control Technology in Rail Transit Passenger Information System
The rail transit Passenger Information System(PIS)utilizes communication and multimedia technology and provides passengers with all-round and multi-scene information service systems based on a variety of display terminals.To address the drawbacks of the current rail transit Passenger Information System,such as overinvestment in hardware,low deployment and debugging efficiency,long broadcast control transmission link,and poor reliability,this paper proposes a cloud broadcast control technology architecture for the new generation Passenger Information System,which is"system into the cloud and broadcast control into the screen,"and describes in detail the technical advantages brought by the cloud play-control architecture through reforming the traditional audio and video transmission modes.The problem regarding picture synchronization on a multidisplay terminal was analyzed.The results show that the cloud play-control technology reduces the fault nodes by 50％,improves the deployment and debugging efficiency,achieves intensive construction,and can provide application support for various personalized scenarios f throughout the entire process of passenger travel from arrival to departure,which can provide reference for the subsequent construction of passenger information systems.
rail transitcloud play-controlplay-control into screenPIS(Passenger Information System)information broadcastnew generation PIS(new-generation Passenger Information System)
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