基于高速公路网的无线语音系统的设计

为了便于对公路的维护与保养,需要一款具有通信功能的移动设备,提出了基于高速公路网的对讲终端的解决方案,在服务端采用嵌入式LINUX平台,利用ALSA数字音频接口,结合麦克风采集原始PCM音频数据,采用G726标准进行音频编解码,采用RTP/RTCP协议,基于wifi实现音频的网络传输.在用户端用支持LINUX系统的PC对音频数据进行编解码,播放.该方案的终端基于高速公路现有网络,具有移动性,经济性,且语音清晰,实时性好.

Design of wireless voice system for highway network

In order to maintain and repair the road,a kind of mobile devices with communication function is necessary. The solution which is based on the highway network intercom terminal was proposed. Used the embedded LINUX platform on the service side,ALSA digital audio interface,standard G726 to realize audio codec and used RTP / RTCP protocol based on wifi to realize network transmission of audio. In the client-to-use,the PC which can support LINUX system was used to code and decode the audio and play it. The terminal of the solution was based on the existing highway network and it has the advantages of mobility,economy,clear voice and real time.