Research And Development On Crucial Technology Of Network Video Monitoring System

The improvement of Multimedia and Network technologies have made media application become more and more popular. Applications such as Online Meeting, Video on Demand, Network Video Monitoring System are playing a more important role in people's life.Upon this fact, based on H.264 Network Video Monitoring System as platform, this thesis proposes the design and implantation of Video Streaming Media Real-Time Transport Module and Player Module based on Real-Time Transport Protocol/Real-time Transport Control Protocol.First, the crucial technologies including H.264 coding standard,Real-Time Transport Protocol/Real-time Transport Control Protocol are introduced. Among them, it mainly introduces the Network Abstraction Layer of H.264 which is related to this thesis, the features of Real-Time Transport Protocol and several packet formats of Real-time Transport Control Protocol.Following that, the core contest is elaborated in details: the implementation of system PC Transport Module and Player Module. First, the developing environment and the research background are sketched; and then Events Driver and Call Back Function Bindings are used, and among application programs, Object-Oriented Programming to achieve the function of Real-Time Transport Protocol is adopted; after that, despite completing all the module functions, Multithreading is proposed to use, and through controlling the State Machine's mechanism, to achieve the organic combination of Streaming Media Transport Module and Player Module in Network Video Monitor System. In addition, the playing speed of video pixel is stabilized in a self-adaptive way to achieve fuzzy synchronization of audio and video.Lastly, Real-Time Transport Protocol/Real-time Transport Control Protocol is also used in this thesis, Transport Rate, Packet Loss Rate and Smooth Packet Loss Rate are compared to determine the outcomes of Smooth Packet Loss Rate Parameter and Network Congestion Threshold Value and to choose different audio coding standard based on the internet status. So that it can automatically adapt to the Congestion-Control function in a complicated network to maximize the efficiency of Quality of Service System.