嵌入式媒体服务器语音编解码算法集成与优化  

Integration and optimization of speech codec algorithm in embedded media server

作　　者：李昊然[1] 谷源涛[1] 

机构地区：[1]清华大学电子工程系,北京100084

出　　处：《电子技术应用》2014年第4期8-10,14,共4页Application of Electronic Technique

摘　　要：介绍面向视频会议的嵌入式媒体服务器中语音编解码算法的集成和优化技术。本系统采用ARM+DSP的嵌入式架构并基于TMS320DM8168芯片实现。在实现G.722语音编解码算法的基础上,参考xDM标准对编解码函数进行封装。随后将此函数集成入远程处理器执行框架(RPE),并在ARM端成功调用DSP上的语音编解码模块。实际测试验证,上述编解码模块运行功能正确,执行效率较高,满足了视频会议对媒体服务器的语音处理要求。Aiming at the implementation of an embedded media server for video conference system, the packaging and optimization techniques for speech codec are studied. This embedded system is designed based on TMS320DM8168, which has an ARM＋DSP heterogeneous architecture. After optimizing and validating the G.722 speech codecs, the codec functions are packaged into xDM-compliant modules. Consequently, these modules are integrated into a framework of remote processor execution （RPE）, which makes the speech codec modules executed in DSP and utilizable for the on-chip ARM. Finally, in real implementation, the codec modules are validated. The result shows that the modules have high efficiency and meet the speech codec requirement for the media server in video conference system.

关 键 词：嵌入式 达芬奇技术 视频会议 RPE G 722 

分 类 号：TN912[电子电信—通信与信息系统]