A Design Of Distributed Receiving Network Of Wireless Video Transmission

Some areas,where a number of inspection industries are located,are vast,remote,geographically dangerous,and always have an awful climate,such as power transportation,oil pipeline transportation,geography mapping,forest fire prevention,border patrol,etc.The current of patrolling method is artificial inspection,so for a long time the staff is needed to working in these bleak area,where living and working is unsufferable and hazardous,even that the workers' lives can not be guaranteed.In addition,a large number of inspectors and reserve staff is needed for some uncertain emergencies.Therefore,the traditional patrolling operation features difficulties,low security,low efficiency,and high cost.In recent years,UAV has developed rapidly,with the prograss of the dynamic technology,control technology and material technology,so that it has some advantages including strong environmental adaptability,cruising speed,rapid response and high precision.Furthermore,under the development of the camera hardwares,image processing technology,pattern recognition technology and computer vision technology,the UAV's function of image acquisition,processing and analysis has been becoming more powerful,even the UAV has been becoming more intelligent.According to the actual needs of the above-mentioned inspection industries,combined with the UAV technology,communication technology and internet technology,this paper has put forward to the concept of UAV wide-area inspection,and has given the the distributed receiving system of wireless video transmission.This system will provide a good solution on the wireless communication,the transportation of the TS and the processing of the video.This paper has described the design ideas,technical principles and implementation in details,which are belong to the whole system that this paper has worked for.The above description includes the demand analysis and design method,design and implementation for hardware and software,analysis of system's test results.The specific research content is summarized as follows:1.The design and implementation of the receiver.With the DVB-T standard,the DiB9090 M,which can realize the dual-antenna hierarchical reception,is the DVB-T demodulation chip to form the air interface.With the bottom-up programming ideas to complete the underlying configuration of the F28M36 x,drivers,internal resources and peripheral cals and top-level applications.The TS processing and dialogue interactive protocol will be running correctly within the framework of the TCP/IP application.2.The Implementation of TS processing algorithm.According to the kernel architecture of F28M36 x,the TS is transfered via McBSP,EPI interface and DMA,and synchronized with shared RAM and IPC.3.The design and implementation of the data center.The data center is the management center of the distributed receiving network,the data processing terminal and the TCP/IP server.Based on Microsoft's mature MFC platform,the data center is supposed to achieve to implement multithreaded concurrent processing,interactive dialogue protocol,distributed data fusion and video playback.4.The interactive dialogue protocol.That will implement the management,control and detection of the distributed receiving network in the data center.5.The distributed data fusion.Aiming at the change of the quality of the figure data caused by the positional relationship between the UAV and the receiver,a distributed data fusion algorithm is put forward,which will make sure the continuity and fluency of video playback.