An Efficient Wireless Video Transmission System Based On Sensor Data:Research And Implementation

With the development and popularization of the Internet in China,the demand for video applications has grown explosively.Live webcast and online videos have become important media and new growth points of Internet economy.Wireless transmission of video is one of the most important ways of video transmission in the era of mobile Inter-net.However,in the scenario of wireless transmission,the energy and wireless channel are very scarce resources.Existing solutions try to optimize the wireless transmission of video by video coding or protocol design.However,most video coding today has high computation cost for using inter prediction and intra prediction.The optimization of the calculation process leads to the video distortion which affects the user experience.We found that in the motion shooting scene,such as outdoor live broadcast,wireless video transmission,etc,the video has continuity,mobility and relevance,and there is redun-dancy caused by devices'movement.The current mobile devices rapidly change and have lots of new features.These devices are usually equipped with advanced sensor,which is small and cheap,and extends function of the mobile device.Due to the correlation of the video frames generated by the movement of the shooting process,this thesis proposes a motion state classification algorithm based on decision tree,so as to find out the correlation between video images and motion.We divide the video data into two parts:reusable and non-reusable.The client transsmitsn non-reusable part and the server calculates reusable part,and then combines the two parts to form a complete video picture.The efficient wireless video transmission system based on sensor data is designed and implemented in this thesis.The system is based on the client/server(C/S)architecture,which includes a client for pushing stream and a server for pulling stream.Our system includes the following function modules:the module of video and sensor data acquisition,the module of video and sensor data processing,the module of pushing stream and the module of pulling stream.Finally,it shows that in the wireless video transmission scene,our system reduces video data transmission by 5.82%than the traditional way.