The Research On Key Device Of Network Video Surveillance System

Network video surveillance system includes Internet transmission,video coding and decoding,embedded system,multimedia transmission and controlling etc.As the key device of network video surveillance system,the embedded video surveillance system consists of embedded technology,video coding and network transmission controlling.Therefore,the research on embedded hardware,software and network technology of embedded video surveillance has a great significance.Firstly,the function requirement of network video surveillance system is analyzed in the paper.An whole system architecture including network video server and embedded video surveillance system is proposed.Then,the embedded video surveillance system hardware and software designing scheme and network video server software architecture are given.Secondly,combing the practicality instance, the designing and implementation of embedded video surveillance system is described in detail.Then,this paper particularly focus on the research of system hardware platform which including video capture module,storage module,network transmission module and describes the PCB desiging process.Thirdly,based on analyzing IEEE802.11 series wireless transmission protocol,research of WLAN topology is done and a method of WLAN implementation is proposed aiming at the features of embedded video surveillance system.Another emphasis of this paper is transplantation ofμClinux in the embedded video surveillance system.Based on deep research in working principle ofμClinux device driver and BootLoader,the system device driver and transplant of u-boot are implemented.Also,the configuration and compiling ofμClinux kernel is introduced.Finally,this paper describes the application designing of video coding based on ffmpeg and network transmission based on RTP/RTCP protocol in detail. Also,an engineering application is showed in this paper.The embedded video surveillance system includes video coding and multiple network communication. Embedded video surveillance system working with network video server has the advantages of stability and reliability and will have great future in the fields of intelligent traffic ,industry producing process,banking,intelligent home,communication, etc.