介绍了一种顺序制胃窥镜的实时图像控制系统,并给出了具体的方案和实现方法。该系统采用锁相的方式,产生高稳定的像素时钟;使用大容量的视频RAM缓存图像,通过对写入的控制,实现图像的编辑;采用ADV7120与AD722相结合,完成视频的编码输出;所有的控制信号由一片EPM7128来实现。整个系统采用高密度的集成器件,体积小巧,结构紧凑,性能良好。 This paper introduces a real-time image control system of sequential gastroscope, and gives a specific program and implementation method. The system uses a phase-locked approach to produce high-stability pixel clock; use large-capacity video RAM cache images, through the control of the write to achieve image editing; ADV7120 and AD722 combined to complete the video encoding and output; all The control signal by a piece of EPM7128 to achieve. The entire system uses high-density integrated devices, small size, compact structure, good performance.