嵌入式Linux下语音的实时采集与传输的实现

Real-time Speech Capturing and Transmission Based on Embedded Linux

以网络监控系统中的语音对讲功能为研究目标,设计实现了语音的实时采集和处理。系统采用S3C6410处理器,搭载嵌入式Linux系统,基于最新的ALSA音频框架,实现了语音的实时采集,并完成了对音频数据的G729A编码处理,最后利用RTP/RTCP协议进行实时网络传输。经测试,接收端的声音流畅、清晰、延时小,达到了预期的要求。

This paper is based on the target of voice intercom function in a network monitoring system.The real-time capturing and processing of speech is designed and implemented.This embedded system uses S3C6410 ARM11 processor as core CPU,equipped with Linux system and the latest ALSA audio framework,achieve the real-time capturing and G729 A encoding of speech.Besides,the real-time network transmission of audio data using RTP / RTCP protocol is also accomplished.