摘要
为了解决目前智能交通系统普遍存在的信道带宽较小、发布的信息内容比较单一、系统建设和使用成本较高等不足,本文提出了一种基于地面传输数字电视DTMB的多媒体交通信息服务系统,实现多媒体交通信息的发布和接收的功能。系统按照DSM-CC协议对路况信息、图像信息和地图数据等多种类型的多媒体交通信息进行分类编码,将编码后的数据流通过地面传输数字电视的大容量广播信道进行传输,智能导航终端接收数字电视信号后从数字电视节目中分离出DSM-CC数据码流,对其进行解码后,得到多媒体交通信息用于导航。完成了原型系统的搭建,验证了系统方案的可行性。结果表明,本系统能够充分利用现有的数字电视传输网络来提供多媒体交通信息服务,系统接入简单,投资较少,使用方便,有广阔的应用前景。
To improve the disadvantages of low bandwidth,single function and high cost in current ITS,a multimedia traffic information service system which is able to broadcast and receive multimedia traffic information based on the Digital Terrestrial Multimedia Broadcast(DTMB) was proposed.The system encodes different types of multimedia traffic information including the basic road status,the images of the traffic crossings,electronic map data updates and other additional information according to DSM-CC protocol,then transmits the encoded data through the DTMB data channel.Intelligent navigation terminal receives the television signal,separates the DSM-CC data stream from the television,then decodes the data and performed navigation.Prototype system validated the feasibility of the architecture.The experiment result shows that the system can make good use of the current digital television transmitting networks to provide multimedia traffic information service.The system requires less money for installation and easy to use,it can be widely used in the future.
出处
《公路交通科技》
CAS
CSCD
北大核心
2009年第S1期111-116,共6页
Journal of Highway and Transportation Research and Development
基金
国家高技术研究发展计划(八六三计划)资助项目(2007AA11Z223)
