[硕士论文] 基于DSP的嵌入式IP语音通信系统设计与开发 [复制链接]

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硕士论文-基于DSP的嵌入式IP语音通信系统设计与开发，共75页，42484字

摘 要

多媒体通信等信息技术的不断融合，使得基于 IP 网的实时音视频通信成为目

前 Internet 网络领域的热门研究课题。IP 语音通信是通过 IP 网络技术实时传输语

音信息的技术，在 IP 网络上实现可靠的音频和数据协同。目前，如何实现保证服

务质量的 IP 语音通信是研究的难点问题。而集成电路技术发展，为实现可靠 IP

语音通信提供了契机。本文正是针对这一现状，研究开发一套基于 DSP 的 IP 语音

通信系统。

(1) 深入研究并论述了 IP 语音通信的基本原理及其关键技术，包括网络传输

技术，信令技术以及语音编码技术中线性预测编码分析、合成分析、码激励线性

预测编码技术，并对 G.729 算法进行了进一步的分析。

(2) 根据 IP 语音通信系统的功能要求，给出了 系统的总体方案，设计了以

TMS320VC5402 为核心的 IP 语音通信系统，阐述了系统的组成原理及语音，网络

接口等主要硬件模块功能。

(3) 深入分析 G.729 语音编码算法，采用高级语言平台进行了仿真和验证。针

对 G.729 算法的 DSP 平台实现，提出了采用 C 语言和汇编级优化设计方法，进行

了准确性和效率测试。测试结果进一步表明优化设计方法的有效性和正确性，显

著地提高了程序的运行效率。

(4) 针对 TCP/IP 协议在 DSP 平台的应用，给出了以太网控制器的驱动实现以

及 ARP、IP、UDP 协议的实现。系统通过了 UDP 通信测试，给出了测试过程数据

图，实现了基于 UDP 协议的语音通信。

本文设计的基于 DSP 的 IP 语音通信系统，采用优化语音编码算法 G.729 实现

DSP 平台运行，使系统运行性能得到较大改善，实现了基于 UDP 的语音通信。并

针对算法的进一步优化和 IP 语音通信过程中的 QoS 问题，提出了研究工作的展望。

关键词：IP 语音通信；数字信号处理器；语音编码算法；TCP/IP

Abstract

With the convergence of multi-media information technology, the real-time

transmission of voice and video over IP has been a hot issue in research on Internet. IP

speech communication is the technology of the real-time speech transmission over IP

network, which can achieve the coordination of data and voice. It’s still a problem that

network achieve the quality of service requirements. Besides, with the development of

ASIC and DSP, there are more chances to research on VoIP. In view of the present

situation, an IP speech communication system based on DSP was designed in the paper.

Firstly, the basic principle and key technologies including network transmission,

signaling and speech coding (LPC,ABS,CELP) of IP speech communication were

illustrated in the paper.G.729 algorithm was also analysed.

Secondly, according to the function requirement of VoIP, the overall design of the

system was given out and the VoIP system based on TMS320VC5402 was designed.

The component of the system and the function of hardware module such as speech,

network interface were explained.

Thirdly, the simulation of G.729 speech coding algorithm was done on the

High-Level language platform. The optimization methods which adopt C and assemble

language were exposed to realize G.729 on DSP. Accuracy and efficiency test were

done. Test results indicated the accuracy and efficiency of the optimization methods,

which improve the program operation efficiency.

Fourthly, the realization of TCP/IP on DSP was exposed. The driver of Ethernet

controller and realization of ARP，IP，UDP protocols were given. UDP communication

test was done and test data process diagram was given. Finally the IP speech

communication based on UDP was realized.

The IP speech communication system adopted a optimize speech coding algorithm

G.729. The performance of the system became better. UDP speech communication was

also realized on the platform. The further optimization method to the speech coding

algorithm and QoS of the VoIP were also expanded in the future research.

Key Words: IP Speech Communication；DSP；Speech Coding；TCP/IP

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• 硕士论文-基于DSP的嵌入式IP语音通信系统设计与开发
• 硕士论文-基于DSP的嵌入式IP语音通信系统设计与开发.doc  [1.36MB]