The Design And Implementation Of Embedded Wireless Video Monitoring System

Video monitoring shows us a kind of real time,veritable images,which can provide a real time video analysis means to these people who cannot reach the scene.With the development of economic construction,both traditional financial industries and transportation industry,video monitoring has always played a important role from beginning to end.The traditional video monitoring system must have some cables to connect each other,it’s very complex.The embedded wireless video monitoring system designed has abandoned the disadvantages of traditional video monitoring system of wired,which can provide a flowing video stream to PC and mobile client in a certain instance.This system first used external camera to catch the video data,and the video data was processed by the software runs on the server side of the development board,and at last,the WiFi signal which issued by the wireless adapter on the development board is used to transfer video data to the client.After described the function of system,the whole design scheme of embedded wireless video monitoring system is expounded briefly.In the embedded wireless video monitoring system,JZ2440 development board was chosen to be a hardware platform,and build the essential software system on it for the system,mainly involving transplant cross-compiler toolchain,transplant Bootloader,transplant the Linux kernel and the specially crafted file system.There are two parts,server software and client software design,in the software design of the system.In the design of server software,open source software,MJPG-streamer was transplanted to collect and transport video data.In the collect part,V4L2,which support by linux kernel,was used to catch the video images;in the transport part,the technology of socket network communication was used to transport the video data.Clients include PC client and mobile phone client.Qt was used to design PC client,and it has a better portability,ease of use and a nice interface.And on the mobile phone part,Android technology was used to design an easy to operate and install client,which can achieve real-time monitoring of video,take photos and other functions.Finally,to test the overall performance of the system,it is already achieving the desired results.The system can correctly identify the camera and wireless network adapter after it starts up,mobile client and PC client both can acquire video streams smoothly and steady when they connect the WiFi signal which issued by server.