地铁多媒体信息系统的视频控制子系统研究

发布时间：2018-04-19 12:44

本文选题：高清 + 地面数字电视广播　；参考：《北京交通大学》2012年硕士论文

【摘要】：摘要：目前地铁中有地铁乘客信息系统(Passenger Information System,即PIS系统)和视频监控系统两大多媒体系统。随着地铁运营商服务意识的提高以及多媒体技术的发展,这就要求车载PIS系统在火灾、恐怖袭击等紧急情况下要能提供更为详细的信息,因而应当具有较高的安全保障能力,而视频监控系统在安全监控方面正好具有信息量大、视觉直观、报警精确度高的特点。因此,本文将这两大系统集成在一起,构建了地铁多媒体信息系统(Multimedia Information System)。它是应用在地铁列车上的、既面向地铁乘客又面向司服人员的一套全数字化IP网络信息系统。当前的PIS系统主要为乘客提供丰富的资讯、娱乐节目,而视频监控系统则为乘务人员提供车厢内实时视频监控。MIS系统则将这两大系统结合在了一起。作为地铁MIS系统的一部分,为了满足乘客对资讯节目的实时性、高清晰的要求,以及满足乘务人员对视频监控的高清晰度、多路监控视频查看的要求,研究并实现了本视频控制子系统。本视频控制子系统利用了近年来出现的DTMB地面数字电视广播作为实时节目来源,采用体积小巧、且低功耗的廉价ION平台搭建了集中控制单元,并设计实现了上层软件,利用了平台中集成的图形处理器加速系统中的视频处理功能,视频分辨率高达720p,满足了系统对进行大量高清晰视频处理的需求,取得了良好的测试效果。论文主要对本视频控制子系统的各个功能模块的具体实现进行了研究,包括：1)接收DTMB地面数字高清电视广播,并在司机室本地解码和显示,同时把电视信号转发至客室播放,实现了资讯的实时播报,同时DTMB可切换不同频道,保证了节目的丰富性；2)实现了将各种高清视频短片,如地铁宣传片和高清广告等存储在本地,然后在需要时在司机室本地播放并发送到客室显示；3)实现了同时接收多路高清监控视频,能够在本地进行多画面显示,最多支持16路监控视频的并行显示,同时,地面控制中心也可通过网络直接查看车内实时监控视频。
[Abstract]:Absrtact: there are two multimedia systems in subway: passenger Information system (PIS system) and video surveillance system.With the improvement of subway operators' service awareness and the development of multimedia technology, it is required that the on-board PIS system should be able to provide more detailed information in emergency situations such as fire, terrorist attacks and so on, so it should have a higher safety and security capability.The video surveillance system has the characteristics of large amount of information, visual intuitionistic and high alarm accuracy in the aspect of security monitoring.Therefore, this paper integrates the two systems together and constructs the subway multimedia Information system.It is a set of full digital IP network information system, which is applied to subway train, which is not only for subway passengers but also for service personnel.The current PIS system mainly provides the passengers with abundant information and entertainment programs, while the video surveillance system provides real-time video surveillance in the cabin for the crew. The two systems are combined together.As part of the subway MIS system, in order to meet the requirements of real-time, high-definition, high-definition and multi-channel surveillance of video surveillance by crew members,The video control subsystem is studied and implemented.This video control subsystem uses DTMB terrestrial digital television broadcasting as a real-time program source, and uses a compact and low power ION platform to build a centralized control unit, and designs and implements the upper software.The video processing function of the integrated graphics processor in the platform is utilized. The video resolution is as high as 720p, which meets the demand of the system for a large number of high-definition video processing, and achieves a good test result.This paper mainly studies the realization of each function module of this video control subsystem, including: 1) receiving DTMB terrestrial digital HDTV broadcast, decoding and displaying it locally in the driver's room, and transmitting the TV signal to the guest room at the same time.At the same time, DTMB can switch different channels to ensure the richness of the program.) it can store all kinds of high-definition video clips, such as subway propaganda film and high-definition advertisement, in the local area.Then when needed in the driver's room local play and send to the passenger room display (3) realize to receive multi-channel high-definition surveillance video simultaneously, can carry on the multi-screen display in the local place, support the parallel display of the 16-channel surveillance video at most, at the same time, at the same time,The ground control center can also view the real-time surveillance video directly through the network.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TP391.41;TP273

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