Research And Implementation Of The Wireless Video Monitoring System Of Web Camera Based On Embedded System

This paper has proposed a wireless web video surveillance system towards thepresent ones in the market with the disadvantages of routing， constructingcomplexity，hard to develop and maintain， and its transmission limitation is alsoconcerned．The system is as Embedded Web technique，streaming media technologyand motion tracing frame technology as its core，its transmission medium is basedon wireless networks．Consequently，the surveillance system is unmanned with HDdynamic images，and convenient to install and update，profound of practical use．The system is selected a microcontroller of core AMR920T to process imagedata，data collection is realize by a USB camera，whose central controller isVimicro ZC301; through USB wireless net adaptor to transmit image data．Theembedded web and video service are realized in the environment Linux，the motionis detected by frame difference．The CGI program begin to interact with videoserver after Web server receive HTTP request，the video server drives up thecamera to acquire the image，processes and send it to Web server，the Web serversend the acquired data to remote clients in the format of HTML，and authorize theclients to browse the video data through web browsers，set the parameters，and alsocontrol the camera angels．The paper introduces the software and the hardware architectures of thesystem including the establishing of the soft environment，transplantation of the BLand Linux kernel，the drivers realize of USB camera and wireless net adaptor，andmaking yaffs file system， discuss Web server and MJPG-Streamer interactivecompile，analyze the decoding of dynamic authentication CGI program and theframe difference theories in detail．The test shows that the surveillance video640x480pixels of5fps with fluent image and low latency can be browsed on PCterminal．...