Design Of Video Monitoring System Based On FPGA

In the military field and civil field, because of its intuitive, convenient andcomprehensive information, video monitoring technology made it has majorsignificance and broad application prospect of market and research. Because of theadvantage of application flexibility, high integration, powerful functions, lowdevelopment cost, the parallel processing ability and the characteristics of assemblyline work, the FPGA(Field programmable Gate Array) had been increasingly appliedin the field of video image processing.First of all, the paper introduced the research background, the development ofvideo monitoring system and the status. And then through the project demonstrationsystem framework was designed, including the acquisition, storage, handling of videoimage and VGA display. This paper used the FPGA technology to realize the vehiclevideo monitor system, selected the OmniVision company OV7670chip as the videocapture image sensor, the Cyclone III series FPGA EP3C5F256A7N of Alteracompany as the main control chip to form the system hardware platform, combiningthe ADV7123-D/A converter chip to complete the VGA display and the4M*16bitK4S641632SDRAM chip to complete the frame storage and processing parts.Specific implementation process is as follows: adopted the OmniVision OV7670chip to collect real-time video image, sent the data to Cyclone III series FPGAEP3C5F256A7N through the interface, conducted the I2C bus configuration to makeit work in a predetermined mode; the datas in the FPGA chip transformed thestandard RGB format, then the RGB datas were wrote to SDRAM with write clock, atthe same time, the datas could be read with read clock. Under the condtion, twopieces of SDRAM done the ping-pong operation: One piece of SDRAMs accepted allthe way from video collection of images, read and sent to the FPGA processing, andthen wrote data directly to the local VGA display, namely the real-time collection ofcolor images; Do all the way to write data on one SDRAM in operation, the SDRAMread; So repeat the process.The implementation of the video image processing system, the key is the FPGAmaster processing module programming, using hardware description language tocomplete, and in the Quartus II software development platform to complete the program design and simulation of the system. Finally, a simple debugging test processand test results are introduced. Results show that this system can complete the imageprocessing and display function, and has the following features: low cost, highefficient video data processing, real-time effect is good, strong extensibility.