音视频数据网络实时传输的性能测试与分析

发布时间：2018-03-07 09:03

本文选题：流媒体　切入点：网络实时传输协议　出处：《浙江工业大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着多媒体业务的快速构建,特别是网络电视、网上教学、视频会议、在线直播等以音视频为主的视频监控已经在互联网上得到了极大的推广,它们在人们的学习、工作以及生活方面都打上了深刻的烙印。多媒体业务未来的发展不但依靠网络技术的提升,还需要网络测量在质量评估方面发挥更大的作用。本课题旨在开发出一款用于实现对移动视频监控系统进行测试和分析的客户端软件,测试对象为在IP网络中实时传输的音频和视频。采用被动流量测试方法,在共享网络下捕获各种网络数据包,着重解析ARP、IP、ICMP、TCP、UDP、RTP网络层协议的具体信息,根据RTP报头的关键字段计算出发送包数、接收包数、丢包率、时延抖动等QoS参数,从而为流媒体数据的质量评估提供了客观依据。本文首先介绍了实时传输协议的报头结构、工作原理和打包策略,以及WinPcap技术的主要功能、组成框架和安装过程。然后对客户端软件的设计和实现进行了阐述,设计过程中介绍了软件的性能测试指标、整体框架、MFC界面的设计,还对捕获模块和分析模块这两大核心内容展开了详细的设计分析。最后利用客户端测试软件进行功能的测试以及音视频数据的分析。在移动设备有线音视频采集和3G无线音视频采集的两种实验环境下进行数据比较,分析了丢包率、时延抖动和传输速率等参数,使用MATLAB绘制成图表来全面客观地阐述参数对音视频服务质量的影响。
[Abstract]:With the rapid construction of multimedia business, especially the network television, online teaching, video conference, live broadcast and other audio-video surveillance has been greatly promoted on the Internet, they are learning in people. Work and life are deeply branded. The future development of multimedia business depends not only on the improvement of network technology, The purpose of this paper is to develop a client software for testing and analyzing mobile video surveillance system. The test object is audio and video transmitted in real time over IP network. The passive traffic testing method is used to capture all kinds of network data packets under the shared network, and the detailed information of ARPIP IP / IP / TCP / UDP / RTP network layer protocol is analyzed emphatically. According to the key fields of the RTP header, the QoS parameters such as the number of packets sent, the number of packets received, the rate of packet loss and the delay jitter are calculated, which provides an objective basis for the quality evaluation of streaming media data. Firstly, this paper introduces the header structure of the real-time transmission protocol. The working principle and packaging strategy, as well as the main functions of WinPcap technology, the composing frame and the installation process are described. Then, the design and implementation of the client software are described, and the performance test indexes of the software are introduced in the design process. The design of MFC interface, In addition, the capture module and the analysis module are designed and analyzed in detail. Finally, using the client test software to test the function and analyze the audio and video data. Compared with the two experimental environments of 3G wireless audio and video acquisition, The parameters such as packet loss rate, delay jitter and transmission rate are analyzed, and the effect of parameters on the quality of service of audio and video is described objectively and comprehensively by using MATLAB to chart.
【学位授予单位】：浙江工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN919.8

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