针对图像传输不稳定的问题,设计了一种基于FPGA的实时视频图像传输系统。采用用户数据报协议(UDP)作为通信协议,图像采集选用OV5640图像传感器,其内部集成了传感器和图像处理单元,更加方便稳定;图像处理选用的是Altera公司的EP4CE10F17C8N系列芯片。当摄像头采集到图像数据后暂存到DDR3 SDRAM中,FPGA再读取暂存的图像信息,对其预处理后将图像数据以以太网帧格式封装,利用板卡自带的千兆以太网芯片RTL8211F实现通过以太网将读取的信息发送给PC机,再通过上位机读取图像信息并实时显示,图像分辨率为1280×720。实验结果表明,该系统实现了实时视频图像传输,图像传输稳定,能有效、稳定地工作。

For the problem of unstable image transmission,this paper designs a real-time video image transmission system based on FPGA,using User Datagram Protocol (UDP) as the communication protocol,the image acquisition is selected from OV5640 image sensor,which integrates the sensor and image processing unit internally,more convenient and stable.The image processing chip is selected from Altera's EP4CE10F17C8N,it is temporarily stored in DDR3 SDRAM,and then the FPGA reads the temporarily stored image information,pre-processes it and then encapsulates the image data in Ethernet frame format,and uses the Gigabit Ethernet chip RTL8211F that comes with the board to send the read information to the PC through Ethernet,and then reads the image information and displays it in real time through the upper computer.The experiment shows that the system achieves real-time video image transmission,and the transmitted image is stable and can work effectively and stably.