【作者】 葛镜；

【导师】 张国平；

【作者基本信息】 华中师范大学 ， 电路与系统， 2007， 硕士

【摘要】 多媒体技术和计算机网络技术的不断进步使网络多媒体应用日益普及和快速发展。视频会议，视频点播，远程教育，IPTV等多媒体应用在人们的日常生活中发挥着越来越重要的作用。本文正是在这样的前提下，对多媒体技术和网络协议进行深入研究的基础上，提出了基于RTP协议的视频流媒体实时传输系统的设计与实现。论文首先在对各个视频压缩技术进行比较后，选择MPEG-4运动图像压缩编码标准作为本系统的视频压缩技术，并详细研究了MPEG-4标准的内容和优势，它广泛应用于低码率传输。如何在网络上实时传输MPEG-4码流是当前的一个研究热门，也是未来网络多媒体的一个重要的研究方向。接着对网络传输协议进行分析比较，选用RTP／RTCP协议作为本系统传输层协议，并深入分析了RTP／RTCP的特点、内容。最后给出了本系统的总体结构和系统各个模块的解决方案，包括网络传输模块，网络接收模块，视频编码控制模块和视频播放模块等。本系统具有视频采集、播放、网络传输、网络接收、解压等功能，达到了MPEG-4网络组播的基本要求，能实时传输视频图像。除视频采集功能外均采用软件实现，有较强的可移植性和易于升级，同时硬件投资也不高。更多还原

【Abstract】 The steady advancement of technology in the field of multimedia and computer networks has become a strong impetus to the development and popularization of the networked multimedia applications. Distributed multimedia applications such as videoconference, video on demand, long-distance education, IPTV etc. are more and more important to people’s life.Accordiong to these, and based on the in-depth research of the basic theory of multimedia technology and networks protocol, the research project of the thesis is to research an RTP-based streaming media real-time transmission syatem design and implementation. The thesis includes the following parts: Firstly, after comparisons of the various video compression technology, MPEG-4 video coding standards is chosen, and content and advantages of the MPEG-4 is detailedly studied. It is a very popular multimedia codec, which used in the low bit-rate transport in the network, how to transport MPEG-4 bit-stream in the network real-time is a hotspot of research. And then this thesis lucubrates the contents and characters of RTP and believes that RTP is well suitable for the video transmission. Finally, The thesis introduces the whole design project of this system and details research process of every program source produce module, which including network transmission module, network receiver module, video coding control module, playing back module for video and so on.The system comprises functions of video data collecting, playback, netwok transmission, network receiver, decoding. The test result shows that the system can real-time transport MPEG-4 video Multicast and playback the video well. The most of the functions are archived by software, except video data collecting. the system costs low In hardware investment and can be updated easily.更多还原