智能终端接收广播数字电视的设计与实现

Design and implementation of an intelligent terminal for receiving broadcast digital television programs

介绍了基于嵌入式Linux的数字电视流媒体转发系统实现免流量接收转发地面广播数字电视信号的方法.该系统采用内置的电视棒调谐接收射频信号,并解调成含有多路节目的 TS流,通过服务器进行分发成为多个单路节目TS流,传输给流媒体服务器,在WIFI热点所建的局域网内,基于TCP/IP和RTSP协议,采用IP多播技术,免流量传输给智能手机终端.这套系统突破已有技术局限接收广泛覆盖的数字电视信号,拥有便携、免流量接收、节省网络带宽等优点.

A method based on the embedded Linux system for the free receiving and transmitting of the ground broadcast digital television signals was introduced and implemented. In this system, the built-in TV stick was used to tune and receive radio frequency signals, which were demodulated into TS streams containing multiple programs to be distributed by the server. The streams were transmitted to the streaming server, within the local area network （LAN） built by WIFI hotspots, based on RTSP protocol and TCP/IP protocol, through the IP multieast technology, and were transmitted to intelligent mobile terminals freely. The system has the advantage of being portable and free and saves network bandwidth.