为实现将时间值、方位值等串口通讯信息叠加进数字视频图像信号的某一固定行中，设计了基于FPGA的通讯数据与数字视频数据的融合系统。采用FPGA程序设计实现串行数据接收与内置FIFO处理，并提取视频数据的某一固定行，进行数据融合，使得通讯数据和视频数据在场信号有效下组合输出。基于FPGA的通讯数据与数字视频数据的融合系统实现了通讯数据与视频数据的融合，试验中通讯数据波特率为230.4 kbit/s，视频信号帧频50 Hz，视频数据与通讯数据帧频相同，图像像素为1 024×1 024，通讯数据正确的融合入一场图像的最后一行中，系统工作稳定，工作状态良好。基于FPGA的通讯数据与数字视频数据的融合系统以最简硬件系统实现了通讯数据与数字视频数据的组合输出，满足图像处理及显示系统的要求，具有广泛的工程意义。

To realize the composition of the serial port information such as time and azimuth value on the fixed line of the digital video signal, the communication data and digital video signal composition system has been designed. Based on FPGA, the serial port data is received and processed by the FIFO module, and a fixed line signal is extracted. The communication data and video signal composition is realized, and the composition data is output under the frame valid signal. The communication data and digital video signal composition system based on FPGA realized the data composition function. In the experiment, the baud rate of the communication data is 230.4 kbit/s, frame rate of the video signal is 50 Hz, pixel size is 1 024×1 024, the communication data is composed in the last line of one frame video signal correctly, the system works stably and the work status is good. The communication data and digital video signal composition system based on FPGA realizes the data composition in the simplest hardware system, meets the requirements of the image processing and display system, has broad engineer meaning.