基于DTMB多屏互动传输系统的设计和实现

Design and implementation of DTMB multi-screen interactive transmission system

随着数字电视传输技术的不断发展和智能终端的快速普及,数字电视的形式也趋于多样化。在考虑传统IP网络电视、有线电视和广播电视所具有的优势和不足的基础上,克服传统电视系统的缺点,利用IP网络传输的模式,设计并实现了一种基于地面数字广播电视(DTMB)多屏互动系统。通过地面广播电视网与宽带IP网相结合,把地面数字电视信号通过IP网组播方式传送给智能终端设备,能够有效降低对网络资源的消耗,同时保证多台智能设备同时观看电视节目。首先介绍了系统的硬件框图和系统所涉及到的主要芯片,然后详细描述了解调软件设计、IP over TS的实现和客户端软件的设计流程,最后总结了系统可应用的场景。

With the continuous development of digital television transmission technology and the rapid popularization of intelligent terminals,the form of digital television tends to be diversified.Considering the advantages and disadvantages of traditional IP network television,cable television and radio television and in order to overcome the shortcomings of traditional TV transmission system,the use of IP network transmission mode,this paper designed and realized a multiscreen interactive system based on terrestrial digital broadcasting television（DTMB）.Through the combination of terrestrial broadcasting network and broadband IP network,the terrestrial digital TV signal through IP network multicast transmission to the intelligent terminal equipment,can effectively reduce the consumption of network resources,while ensuring that multiple intelligent devices at the same time watch TV programs.Firstly,introduced the system hardware block diagram and the main chip that the system involved in.Then,described the design of demodulation software,the realization of IP over TS and the design flow of client software in detail.Finally,summarized the application scene of the system.