Research And Design Of Video Surveillance System Based On FPGA

With the development of society and the improvement of people’s safety consciousness, more and more places need to install video surveillance equipments. The large demand of video surveillance equipments not only causes a strong competition in the industry, but also promotes the innovation and the development of the monitoring technology. In recent years, more and more different high-end processor model monitoring equipments are used. Among them, the most representative one is the video surveillance system that puts the field programmable logic gate array FPGA(field programmable gate array) as the core of the video image data processing. FPGA has many advantages, such as high integration, good portability, high speed of data processing, short design cycle and low cost of the development. Especially, its ability to process data in parallel and pipeline technology have a good effect on the speed of improving image processing. Therefore, it is very suitable for the field of video surveillance which is on the basis of the image processing technolo gy.FPGA is used as the center of data processing and system control by the video monitoring system. O V7670 image sensor, ADV7123 digital analog converter, M25P40 chip and SDRAM cache chip were mainly applied. When the system is working, the image data which is collected by the camera is sent to FPGA chip, then the data is dealt with by the FPGA processor. The data which has been processed is divided into two roads. O ne road is imported in the video image display device for real-time display, and another road being compressed by H.264 video compression algorithm is stored in the memorizer.In this paper, firstly, the domestic and international development and the research content of the video monitoring system were introduced. Secondly, the basic theoretical knowledge and algorithm related to the video monitoring system were expounded. Thirdly, the scheme of video monitoring system based on FPGA was designed. The system mainly included the design of the hardware part and the development of the software module. The hardware part which was responsible for the collecting, processing, compressing, saving, displaying and timing control made up the design of the circuit and the making of the development board. The main modules of the software part covered the collection of data, the control of I2 C, the control of SDRAM, the display control of VGA, the compression of data and the save of data. The code module was written by hardware description language. After the system design was completed, the experimental platform was set up and the experimental results were verified and analyzed. The results achieved the expected goal. The system has the following characteristics: the data processing is fast, the design cost is low, the video display of real-time is good and to expand is easy.