| With the rapid development of society and the rising of our living standard, the public security consciousness increased gradually. As an important part in the field of security, network video surveillance system has been widely applied. In the network video surveillance system, the technology of video data acquisition, coding, transmission and controlling is the key. The network video transmission system is a peculiar system which is combined with network communication technology, embedded technology and video encoding, transmission and controlling technology. It can improve the whole performance of the network video surveillance system, so it has high engineering significance and market value. The DaVinci chip DM365which uses the H.264coding standard and supports SD/HD video coding, has a great improvement on the video image definition and coding efficiency. Moreover, DM365supports basic network transmission protocol. Therefore the research of network video transmission system based on DM365is of great significance.According to the actual requirement, this paper designs and implements the network video transmission system based on DM365which implements video data acquisition, coding and transmission. This system uses the H.264coding standard and supports the D1(720x576) resolution video.Fist of all, this paper introduces the research background and development trend of network video transmission system, expounds the purpose and meaning of this research, and then explains related technology and principles of network video transmission system.Then, this paper elaborates on the front equipment part of the network video transmission system. By comparing and analyzing the mainstream video transmission system scheme in the market, and combining the actual situation, paper designs the whole structure of the network video transmission system and the hardware scheme based on TMS320DM365, and introduce the development of hardware environment and software architecture in detail.After that, according to the actual situation and requirement, the video processing part of network video transmission system is divided into three modules:video acquisition module, video coding module, video transmission module. Paper mainly describes the basic principle of the three modules, the design and implementation of three each module, and the communication and synchronization between each module.Finally, introduce the development platform and test environment, test the network video transmission system in different network condition and analyze the test results. After that, sum up the whole design, and put forward some suggestions on further development. |
