摘要
该文采用多线程模块化结构实现了一种基于局域网的语音通信实验系统。通过PC机声卡采集和播放语音信号,采用UDP/IP协议在局域网中传送语音数据包,实现点对点双向实时语音通信。该设计除了能测试语音质量、压缩比和编解码延时外,还可把改进或实现的其他标准语音编码器添加到系统语音编解码模块中,实现语音通话。实践表明,实现的系统可用于语音信号处理等相关课程的实验和理论教学。
In this paper, a multi thread and modular structure is used to realize the voice-based communication system based on local area network is implemented. Voice signals are sampled and played through PC 5 s sound card, voice data packet is transmitted through the UDP/IP protocol in the local area network, which can realize point to point two - way real - time voice communica-tion. Besides these tests of quality speech, compression ratio, delay of encoding and decoding, improved or realized other standard speech codec can be added to coding and decoding module of this system and realizing voice communication. Practice shows that the re-alization of the system can be used for speech signal processing and other related courses of experimental and theoretical teaching.
作者
李强
明艳
LI Qiang;MING Yan(School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Nanan 400065, Chin)
出处
《实验科学与技术》
2017年第6期20-23,共4页
Experiment Science and Technology
基金
重庆市高等教育教学改革研究重大项目(151010)
重庆邮电大学文峰骨干教师培养项目(W2015-78)
重庆邮电大学教育教改项目(XJG1701)
关键词
局域网
系统设计
模块化结构
性能测试
local area network
system design
modular structure
performance testing
