The Research And Design Of Multiway Wireless Video Monitoring System

The Research and Design of Multiway Wireless Video Monitoring SystemThe field of video surveillance is to monitor an important part in our daily lives has a wide range of applications. Large areas of production, small to our daily lives, we can find the video surveillance of the figure. In the stations, factories, docks, banks have a very important position. With video technology, now the video surveillance is to the intelligent, integrated, wireless direction. The current embedded technology and the development of wireless networks so that more rapid development of video surveillance. In wireless video surveillance, hand-held terminal by monitoring the user can move freely, to overcome the traditional monitoring equipment and the need for cumbersome wiring trouble. While low-power high-performance embedded processors, can provide users with monitoring and other application functionality, so that control end of a perfect integration that contains the application client.Used in the processor based on ARM9 S3c2440, the development of wireless multi-way video surveillance system. To enable multi-way video monitoring, but also has a friendly user interface, including application functionality, while adding the application is given to the control system upgrade. The system is highly integrated, portable, real-time high, the price is high.In system development, the first of this system, the requirement analysis and functional design, detailed for the hardware architecture and software architecture design, and wireless multi-channel video surveillance system for the overall architecture design. Embedded monitoring system and through market research, taking into account the cost and popularity of electronic devices, identify the specific types of hardware devices, such as processor ARM9 processor, OV9650 video capture chip, the wireless transmission using TP-Link321G+and so on. In the choice of software architecture, using ARM-Linux system, kernel configuration, video surveillance systems for the thread and process design. In other software technology choice, in the spirit of open source, using as V4L, RTP, Xvidoce technology, these technologies based on open source we carry out analysis and research, which was the system The design and development.Wireless multi-way video surveillance system and monitoring of client-side collection is divided into two components, there will be more general in the design collection to monitor the acquisition end, and monitoring client side will also receive more than one collection of information sent. Collection side through the OV9650 camera to capture video information; by the video coding xvidcore in xvidcore specific encoding parameters set on the paper tested by experiment, and found suitable for the specific parameter settings embedded platform; then RTP protocol used to send out a wireless network card. Monitoring client acquisition through the end of the wireless network card to receive incoming video encoding information, and then decode it and give it to Qt, the Qt graphical interface library that shows them to monitor the design of the single-side video monitoring, multiple video monitoring, application development features, and can be based on the need for video capture and save and playback. In the expansion of application functionality, we designed based on the Qt Mplayer video player and browser features electronic map, gives way to add other applications. Which will end video surveillance has become a feature of the design of perfect client.In the system design and development for Linux features of the system, a software design processes and threads in the video capture side of the thread design, by the use of threads to improve the collection rate of sending video capture side; in monitoring between the end of the process application designed to allow each application to be a separate process, the process did not interfere with each other, thus ensuring that the use of the application, but also for optimizing performance of the system played a role. Thread and uses Qt in its realization QThread.System development through the integrated environment the use of QtSDK, which greatly facilitates debugging and implementation of the system. According to the idea of embedded software engineering, integrated embedded software development tool of choice is very important. Based on the video surveillance in the study of these key technologies to realize a wireless multi-way video surveillance system. But this is only a beginning, in the future also need to invest more effort to conduct a study on the monitoring system, monitoring system design to become mature.