基于H.264的视频压缩技术及其在视频监控系统中的应用

发布时间：2018-05-31 03:55

本文选题：H.264 + 视频压缩　；参考：《安徽大学》2014年硕士论文

【摘要】：随着视频压缩技术和网络技术的快速发展,视频监控系统作为安防系统的重要组成部分被广泛应用于日常生活的各个领域。相对于传统的视频监控系统而言,基于H.264的网络监控系统成本低、稳定性高、实时性好,具有广阔的应用前景。本文具体研究内容如下：首先介绍了视频监控系统的传输模型,阐述了监控系统的三大组成部分,即前端子系统、视频服务器和网络用户终端；重点介绍传输过程中涉及的几种抗误码技术,如参数集、灵活的宏块次序、数据分割以及冗余片。然后对H.264标准中一些关键技术进行介绍,如分层设计、帧内预测、可变大小的运动补偿、整数DCT变换、熵编码等,为其在网络视频监控系统中的应用奠定了理论基础；并对运动估计现有的搜索算法进行分析,在此基础上给出-种改进的混合搜索算法,通过仿真实验证明其有效性。最后在H.264标准和视频监控系统的理论基础上,本文设计了一个基于H.264的网络监控摄像机。系统在Hi3516SOC平台上实现H.264编码,并设计RTSP服务器用于在网络上传输H.264码流,使用VLC开源软件测试RTSP码流封包的正确性和评估H.264编码的图像效果。实验结果表明,该系统能够通过网络较为稳定地传输视频画面,而且画面清晰、数据传输快,满足视频监控的实时性需求。此外,利用Hi3516处理器平台的移动侦测API接口,本文设置了“移动侦测”功能,并加入“布防时问”的参数控制,更灵活地应用于实际监控系统。
[Abstract]:With the rapid development of video compression technology and network technology, video surveillance system, as an important part of security system, is widely used in every field of daily life. Compared with the traditional video surveillance system, the network monitoring system based on H.264 has the advantages of low cost, high stability and good real-time performance. The contents of this paper are as follows: Firstly, the transmission model of video surveillance system is introduced, and the three main components of the monitoring system, namely, front end subsystem, video server and network user terminal, are introduced, and several anti-error code techniques, such as parameter set, are introduced in detail. Flexible macroblock order, data segmentation and redundancy. Then some key technologies in H.264 are introduced, such as layered design, intra prediction, variable size motion compensation, integer DCT transform, entropy coding, etc., which lay a theoretical foundation for the application of H.264 in network video surveillance system. Based on the analysis of the existing search algorithms for motion estimation, an improved hybrid search algorithm is proposed, which is proved to be effective by simulation. Finally, on the basis of H.264 standard and video surveillance system theory, this paper designs a network surveillance camera based on H.264. The system implements H.264 coding on Hi3516SOC platform, and designs a RTSP server to transmit H.264 code stream over the network. VLC open source software is used to test the correctness of RTSP stream packet and evaluate the image effect of H.264 coding. The experimental results show that the system can transmit the video picture stably through the network, and the picture is clear and the data transmission is fast, which can meet the real-time requirement of video monitoring. In addition, using the API interface of the Hi3516 processor platform, this paper sets up the function of "motion detection", and adds the parameter control of "layout time question", which is more flexible to be applied to the actual monitoring system.
【学位授予单位】：安徽大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN948.6

【参考文献】