基于MPEG-4的网络视频监控系统远程客户端的设计与实现.pdf

华中科技大学
硕士学位论文
基于MPEG-4的网络视频监控系统远程客户端的设计与实现
姓名:陈莎
申请学位级别:硕士
专业:电子与信息系统
指导教师:张江山;刘玉
20070205
摘要
随着网络技术和高性能处理器的不断发展,以互联网为传输载体,以网络视频
服务器为核心的新一代视频监控系统正逐渐成为市场关注的焦点,其显著特点是由
网络视频服务器直接对模拟数据进行高效率的音视频压缩处理,以流媒体形式发送
到客户接入端,用户通过客户端软件或 IE 浏览器即时方便获得音视频数据。
当前网络视频监控系统的应用越来越普及,海量的视频数据和有限的网络带宽
成为主要矛盾;同时市场对监控画面质量的要求也越来越高。本文论述的网络视频
监控系统在提高视频流压缩比的同时,保证了客户终端画面的质量。MPEG-4 视频
编解码标准适用于在低带宽下进行信息交换,可实现对 CIF 和 D1 两种数据格式的
传输,并且根据客户需求,实时选择所需视频流格式。在客户端软件中,图像处
理模块提取图像边缘,并对边缘作平滑处理,以增强图像中的细节信息,改善视
频画面质量,使图像更适合于人的视觉特性或机器的识别系统。
独立设计和实现的网络视频监控系统通过了稳定性测试和功能测试,已实现市
场化应用并受到好评。本文所做工作对网络视频监控系统的应用具有重要的参考价
值,对监控行业的产品升级也具有推广意义。



关键字:网络视频监控系统,MPEG-4,多任务,图像处理,多媒体指令集



I
Abstract
Along with the continuous development of work technique and the high
performance processors, a new generation video monitoring system emerges on the stage.
It shows the characteristic of exploiting server to press the simulative data
directly, delivering the video picture and the control signals with streaming format to the
network connecting end. The users get the video and audio data by the client software or
the Explorer in real-time.
With the popularity work video monitoring system, large volume of video data
conflicts with work bandwidth, at the same time, requirement on the quality of
the monitoring picture is higher and higher. work video monitoring system in this
thesis is guarantee picture quality at client end while raising video pression
ratio. MPEG-4 standard which is the same with switching information in work
bandwidth, realizes the transmission of CIF and D1, and can choose video stream format
according to the client’s need. Image manage module of Client which distills edges in the
receive picture and smoothes them, can enhance details of picture to make it more
agreeable to human eyes and machine recognition system.
The system, designed and implemented independently, has passed stability test and
function test. Moreover, as a product, it