| 摘要: |
| 针对突发地质灾难中无法利用常规通信网络通信的问题，提出一种基于于嵌入式微处
理器OMAP5912 的实时多用户通信方案。采用WiFi无线网卡组建Ad Hoc网络，通过AIC23芯
片实现语音采集和输出，利用动态多用户语音解码算法实现实时多用户话音通话功能。测试
表明，该系统支持多用户同时语音通信功能，语音延迟约60 ms，适合于各种应急通信
等无线应用场合。 |
| 关键词: 无线通信 应急通信 嵌入式系统 语音编解码 自组织网 |
| DOI： |
|
| 基金项目: |
|
| Design of an Emergency Embedded Multi party Call Communication System |
| YAO Yin-di |
| (School of Communication and Information Engineering, Xi′an University of Posts and Telecommunications，Xi′an 710121,China) |
| Abstract: |
| To solve the problem that conventional communication network can not b
e used in outburst geological disasters, this paper proposes a scheme of real t
ime multi user voice communication based on embedded micro processor OMAP5912
.In the scheme,
Ad Hoc network is built based on WiFi wireless network card, voice input
and output is realized by AIC23,and real-time multi-user
voice
communication is accomplished by adopting dynamic multi user voice decoding alg
orithm. Tests show that the scheme supports multi point to multi point real t
ime voice chat,has only about 60ms voice delay,and can be applied in emergency v
oice communication. |
| Key words: wireless communication emergency communication embedded system voice coding/dec
oding Ad Hoc network |
