The Design And Realization Of Video Display System Based On FPGA

With the arrival of the multimedia era,video has become an important way to get information,so the video display technology has become the current hot research.There are generally two kinds of display patterns now: ASIC display pattern and FPGA display pattern.In general,ASIC display pattern has disadvantages of high cost,low generality and not easy to change,however,FPGA display pattern avoids these and has wider usage.The article selects the Cyclone V FPGA produced by Altera as processing platform and the infrared detector as video data sources,which enable us to realize video display system by FPGA display pattern.The main work in this article is divided into three parts: the overall design of system,video capturing and processing and video display.The first part,the overall design of system,introduces the hardware architecture and the realization of the system based on FPGA.The second part,video capturing and processing,includes converting analog video signal which is gotten by driving infrared detector into digital video signal by configuring analog-to-digital chip with SPI,and then processing digital video signal with a series of algorithms.The third part,video display,includes two ways of display.The one includes encoding digital video signal of YCbCr format with CVBS,which is converted from digital video signal of RGB format,and then converting digital video signal after encoding into analog video signal through ADV7127 which outputs to TV.The other includes encoding video signal after image scaling with HDMI,and then converting digital video signal after encoding into three single bits of data signal and a clock signal which outputs to HDMI display.This article simulates each module in the system with EDA tools Modelsim and debugs it on the board to prove the validity of the function of each module,which finally is integrated into video display system.The results of experiments show that the system is stable and reliable,and displays and works well in wide temperature range.