| 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. |
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