基于嵌入式Linux的IP电话系统  

IP Telephone System Based on Embedded Linux

作　　者：吴平[1] 曹晓琳[1] 丁铁夫[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所

出　　处：《电子器件》2005年第4期917-920,924,共5页Chinese Journal of Electron Devices

基　　金：中科院长春光学精密机械与物理研究所青年创新基金项目(Q03S08Z)

摘　　要：为解决噪声环境下的语音通讯问题,采用ARM、DSP和uClinux构成的嵌入式IP电话系统完成语音数据的采集、降噪和传输。分析了μClinux嵌入式操作系统下语音设备驱动程序的开发方法,重点介绍了组播技术及组播技术在IP电话会议功能中的软件实现。实验表明,采用10M以太网满足了本系统128kbit/s语音实时通信要求。In order to solve the communication in the strong noise environment, the embedded IP telephone system that made up of ARM, DSP and μClinux finishes the acquisition, decrease of noise and transfer of speech. The method of kernel device driver for speech acquisition is analyzed in μClinux embedded operating system, technique of multicast and the software realization of multicast technique in the IP telephone meeting are emphasized. The experiment shows that 10M Ethernet can satisfy the demand of real time speech communication with 128 kbit/s of this system.

关 键 词：ΜCLINUX 组播 语音 嵌入式以太网 

分 类 号：TN916.1[电子电信—通信与信息系统] TP316.81[电子电信—信息与通信工程]