| 摘要: |
| 基于低空飞行航空管制组网话音通信应用背景，从音频接口、模数/数模转换接口和网络接口3个核心处理模块出发，研究了网络化语音接入设备的硬件关键技术。从C语言级和汇编级两方面对G.729A语音编解码算法进行改进优化，并给出了语音数据的处理流程，以单片TMS320C6455DSP实时实现了语音4路压缩编码和20路解码处理。采用TCP/IP网络协议实现了多路语音网络通信功能，分析了多路语音串扰问题并设计了相应的解决方案。测试表明，基于该技术实现的设备语音处理延迟小于10 ms，满足多用户语音实时传输要求。 |
| 关键词: 语音组网 远程语音交互终端 接入设备 语音编解码 G.729A标准 |
| DOI： |
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| 基金项目:国家重点实验室基金项目（ITD-U12003/K1260009） |
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| Design and implementation of a multi-user remote voice interactive terminal access equipment |
| LI Hong-guang,GUO Ying,SU Ling-hua,ZHANG Bo,HOU Wen-lin,WANG Ning |
| () |
| Abstract: |
| This paper attempts to study the key technology of network voice access devices with focus on core modules,i.e.voice AD/DA conversion and network interface,according to the background of network voice communication in low altitude air traffic control(ATC). The G.729A voice encode and decode algorithm is optimized both in C and assembly language and flow chart of voice data processing is given.Four channels voice compression coding and twenty channels decode processing are also realized in real-time by single chip TMS320C6455DSP.The network multi-channel voice communication is realized with TCP/IP and multi-channel voice interpolation is solved with solutions accordingly.The test reveals that less than 10 ms time delay of the voice processing device is achieved,which meets the real-time voice transmission demand of multi-subscriber. |
| Key words: voice networking remote voice interactive terminal access equipment speech coder and decoder G.729A standard |
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