视频帧图像信息提取及OSD的设计与实现

Design of the Video Frame Information Detection and OSD

实时视频处理近年来发展迅速,大多数实时视频信号处理算法均建立在对视频流信息的统计基础上。基于FPGA设计了通用视频帧信息提取程序模块,可实现实时对视频流进行分辨率、亮度比、灰度直方等信息提取及在屏幕上显示(OSD)的功能。测试结果表明,视频帧信息提取准确,OSD信息实时更新,兼容性好,运行稳定。此设计需要消耗8 kbit的LE资源和150 kbit的存储资源。

Real-time video processing develops rapidly in recent years. Mostreal-time video signal processing algorithms are based upon the statistical information of the video stream. The design of a universal video frame information detection program module based onFPGA is presented. Specifically, it can detect information such as resolution, brightness ratio and gray histogram, and then display them on the screen （OSD）. The results show that the detection of frame information is accurate and the OSD information updates real-timely. It also has good compatibility and runs stably. This design contains 8 kbit LE （Logic Element） resources and 150 kbit storage resources.