The Design Of Video Capture System Based On FPGA

With the rapid development of computer technology and image processing technology, video capture technology is becoming more and more mature. There have been an increasing number of applications of video capture monitoring equipments in various industries. It provides more convenience for people’s production and life such as traffic safety, robot vision and it has become an essential part of social development. More breakthroughs will be taken place. Traditional video acquisition system basically has DSP chip as system control, but in the pursuit of speed and accuracy, DSP has its own restriction. It can’t be carried out in parallel processing of data, so the speed is very difficult to improve. We must try to make the new breakthroughs based on traditional methods.A video capture system for mold processing in the workshop is introduced by this paper, the system uses to collect the video image of injection processing during the injection molding. The system chooses FPGA chip as the main control chip and makes full use of the parallel data processing of FPGA to achieve hardware acceleration and improve the speed of the video transmission and video capture. When the video image is collected by the CCD camera, the SAA7113video decoder chip makes analog video stream convert to a digital video. After FPGA processes of digital video and alternative storage of the double-SDRAMs,ADV7123makes the digital video to analog video, and then the image displays on the VGA monitor. Video data must also be processed in the FPGA internally, include I2C configuration module, asynchronous FIFO module, video format conversion module, the frame storage module and VGA control module.The development environment QUARTUS II9.0is used by the main system, VHDL programming language completes the program preparation of the internal modules of FPGA. QUARTUS simulation verifies the design results. It shows that the result reaches the target of the initial design and video capture meets the requirements of mold processing workshop. The great value is to provide a good platform for subsequent in-depth study.