Study On Application Of Embedded Video Surveillance System Under Environment Of IPv6

At present, the embedded video surveillance system(EVSS) has become main-stream system that the video surveillance system(VSS) is applied at domestic and inter-national. But in IPv4 platform, it has many problems, such as addresses are shortage, bandwidth can't be allocated reasonably, safe function and move function are poor. On the other hand, the new generation protocol IPv6 which can not only be solved the above problems, but also can be increased the speed and quality of video transmission, and it also has other advantages. How to make the EVSS and IPv6 techniques combined together is an important researching direction on VSS at present.In the paper, the analysis on present research condition and realizing method of the EVSS on IPv6 is made. On the base of practical application, TCP/IPv6 network proto-col stack is adopted to use in embedded real-time operating system(RTOS) of uClinux. MPEG-4, which is currently more popular and maturational technology, is adopted at video decompression/compression, EVSS in the IPv6 environment of application re-search project is realized.In the dissertation, MPEG-4 video coding technology is discussed. An algorithm based on priority estimated vector distribution probability for motion estimation, which can improve the coding technique of the MPEG-4 video, is presented. An algorithm of MPEG-4 video real-time transport is proposed. And the algorithms are used on IPv6 environment VSS. The experimental results indicate that the improved algorithms and the application on IPv6 have a relatively good performance on VSS.In the dissertation, the VSS on IPv6 network of key technologies and concepts, in-cluding IPv6 programming technology, network transport technology, video compres-sion technology, DirectShow technology etc, are introduced. The details of MPEG-4 video coding technology and real-time transporting technology are discussed, and the relative improved algorithms are presented. The design of the VSS in the IPv6 envi-ronment is proposed, the details of the hardware's design and software architecture de-sign are introdued. The software architecture of the system, which are used in the reali-zation of the ideas and strategies, are focused. The strategies, which is to be achieved the RTP audio and video transmission system and to be realized using DirectShow, are analyzed. And the specific realizations of IPv6 Multicast technology and security strat-egy are presented. Finally, the test results and conclusions of the system are given. The experimental results show that:①The improved algorithm is brief and easy to used, MPEG-4 video coding based on it can be improved efficiency by 10% to 20%.②The running of VSS under IPv6 environment is more stable and more rapidly to trans-port.③For improving the security of the system, the VSS on IPv6 is a better than on IPv4.