嵌入式Linux下音频采集与远程回放的实现  

Implementation of audio capture and playback remotely base on embedded Linux system

作　　者：康敬欣[1] 张田[1] 

机构地区：[1]北京化工大学机电工程学院,北京100029

出　　处：《电子设计工程》2017年第13期130-134,共5页Electronic Design Engineering

摘　　要：为了实现远程通信发射系统的音频远程发射,提出了一种嵌入式Linux下音频的本地采集并传输至远端进行回放的设计方案。该方案采用ALSA完成本地音频数据的采集,然后利用FFmpeg将其编码为适合远程传输的AAC格式数据,通过以太网基于UDP协议传输至远端;同时在远端对接收到的音频数据,利用FFmpeg和ALSA分别完成音频的解码和回放。实验结果表明,远端回放的音频信号流畅清晰,该方案执行稳定、可靠性高。In order to achieve the audio transmission remotely of the remote communication transmission system, the design of local audio capturing and transmitting to remote system to playback based on Embedded Linux system is designed in this paper. The ALSA is used to complete the local audio data collection, and the data will be encoded to AAC format which is suitable for remote transmission by using FFmpeg, then the AAC data will be transmitted to remote system via Ethernet based on UDP protocol. At the remote system, the FFmpeg and ALSA are used to complete the audio decoding and playback respectively. The experiment result show that the playback of audio signals is naturally and clearly, and the implementation of the program is steady and highly reliable.

关 键 词：LINUX FFMPEG UDP ALSA 

分 类 号：TN919[电子电信—通信与信息系统]