基于嵌入式的地铁列车多媒体报站系统开发

发布时间：2018-03-09 00:15

本文选题：多媒体播放器　切入点：嵌入式系统　出处：《沈阳工业大学》2012年硕士论文　论文类型：学位论文

【摘要】：随着经济发展与城市化进程加剧，地铁作为低碳环保的公共交通工具已经得到了广泛的应用。同时移动传媒作为新兴媒体已成为人们生活当中重要的信息传播方式。因此车载信息娱乐系统与报站系统是地铁列车必不可少的配置，这样可以使乘客准确地确定到站站点，同时缓解乏味的旅途，也可以轻松地获得各站点的换乘路线、乘车指南等有意义的信息。本文深入地分析了现有报站系统与媒体播放系统的技术解决方案，以及现有系统各自的具体功能，设计开发了一种采用嵌入式技术的车载媒体报站系统，完成了系统功能测试。本文设计的地铁车载系统，其硬件平台是采用Intel的Xscale PXA270芯片为核心处理器，嵌入式操作系统为WinCE。此系统采用分布式布局，即在列车的车头放置车载广播中心，实现站点的接收、媒体文件的存储，通过IP组播将到站离站信息与媒体文件传输至各节车厢。在各节车厢放置车载播放终端，，负责接收站点信息与媒体文件，并完成多媒体播放与站点信息的广播报站功能。各节车厢的车载播放终端也可以作为车载广播中心进行工作，这样系统更加稳定可靠。媒体文件的播放采用DirectShow技术，解码优秀，开发快捷。自动报站则通过在各站点放置站台节点，列车安装车载节点来实现的，通过对各站点进行统一编码来区别各站点，同时通过RF射频发送各站点信息，当车载节点进入到接收范围则接收到站站点信息从而实现报站。经测试系统的媒体文件播放、自动报站语音与视图提示、相关信息提示等功能均已实现；车载广播中心通过更改播放列表完成媒体文件的更新，既方便快捷又经济；车载播放终端界面简洁人性化，通过软件升级可支持更多种格式。
[Abstract]:As the process of economic development and urbanization intensifies, Subway has been widely used as a low carbon environmental protection public transportation system. Meanwhile, as a new medium, mobile media has become an important way of information dissemination in people's daily life. The system is the essential configuration of the subway train. This allows passengers to determine exactly where to arrive, to ease tedious journeys, and to easily obtain meaningful information about the transfer routes, ride guides, and so on. This paper deeply analyzes the technical solutions of the existing message system and the media playback system, as well as the specific functions of the existing system, and designs and develops a kind of on-board media reporting system based on embedded technology. The system function test is completed. The hardware platform of this system is based on Xscale PXA270 chip of Intel and the embedded operating system is WinCE. This system adopts distributed layout, that is, the on-board broadcasting center is placed in the front of the train. To realize the receiving of the station, the storage of the media files, the transfer of the information and the media files to the compartments through IP multicast, and the placement of the on-board playback terminals in the compartments, which are responsible for receiving the information and media files of the stations. And complete multimedia play and site information broadcast station function. The on-board terminal of each car can also be used as the vehicle broadcast center, so the system is more stable and reliable. The media file is played by DirectShow technology, and the decoding is excellent. The automatic reporting station is realized by placing the station node in each station, the train installs the on-board node to realize, by carrying on the unified code to each station to distinguish each station, at the same time sending the information of each station through the RF radio frequency, When the vehicle node enters the receiving range, it receives the station station information to realize the station reporting. After the media files are played in the test system, the functions such as voice and view prompt, related information prompt and so on have been realized, the vehicle broadcast center completes the update of the media files by changing the playlist, which is convenient, quick and economical. Vehicle player terminal interface simple humanization, through software upgrade can support more formats.
【学位授予单位】：沈阳工业大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TP368.12

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