文档介绍：安徽大学
硕士学位论文
基于VOIP的综合接入语音网关的研究与设计
姓名:李浩
申请学位级别:硕士
专业:通信与信息系统
指导教师:蔡德林
2010-04
摘要
摘要
VoIP(Voice Over IP)技术就是基于IP的语音通信技术,是互联网时代快速发
展的一种技术。近年来随着互联网和IP技术的大规模应用,Vo I P 获得了爆发式的
增长,为用户提供了传统电话所未尝试过的应用。更由于其基础硬件的通用性和
灵活性,使得Vo I P 系统不仅能提供传统的电话语音服务,还能通过硬件系统转换,
将多种语音通信方式进行互联互通,实现融合通信。
本文中设计的语音综合接入网关提供了IP电话,传统的PSTN电话,无线电
台,并创新性的提供了GSM/CDMA电话接口。通过其开放的软交换技术体系和
专用语音DSP和通用FPGA芯片来实现语音接入和数据交换功能的。
本文选题来自安徽四创电子股份有限公司的研发项目,项目的目的是开发出
支持FXS ( Foreign Exchange Station ), FXO ( Foreign Exchange Station ),
Radio,GSM/CDMA等多种接口的嵌入式的语音综合接入设备,并能灵活选择通信
及出局方式。本论文就是基于该项目进行展开的。
本文首先介绍了研究的背景,对该网关设备所涉及到的Vo I P 的几种关键技术
进行介绍。其次对该网关产品的硬件组成部分进行了分模块介绍和研究,包括
DSP模块和FPGA模块。并针对硬件整体架构分析其工作原理和流程,对系统的
关键部分分析其工作原理和流程。最后,设计了系统的语音处理流程,经测试证
明了设计的系统达到了预期目标。

关键词:Vo I P ,SIP,DSP,FPGA

I
Abstract
Abstract
VoIP (Voice Over IP) technology is a IP-based munications technolo-
gy, get a large development in the times. In recent years, with the and
IP technology larger scale application, VoIP won the explosive growth and practical
application, provides users with an unprecedented applications which can’t be provid-
ed in traditional ways. Since its foundation hardware is more universal and flexible,
by the hardware system conversion, the VoIP systems can not only offer traditional
telephone services, but also carry out a variety of munications interoperabil-
ity.
The integrated voice access gateway designed in this article is for IP phone,
traditional PSTN phone, wireless radio, and provide GSM/munication
ports creative design. Base on its open soft switch technology system, with the
specialized voice DSP and FPGA chip, it achieve universal access to voice and data
exchange functionality.
This article es from Anhui Sun Create Electronics Co., Ltd's research
and development projects, the purpose of the project is to develop an equipment can
multi-access FXS(Foreign Exchange Station), FXO(Foreign Exchange Station), RA-
DIO, GSM/CDMA and other