基于CPLD的胃窥镜图像控制系统  

Small image control system of gastroscope based on CPLD

作　　者：吴建坤[1] 钟堰利[1] 王伟 

机构地区：[1]北京理工大学信息科学技术学院光电工程系,北京100081

出　　处：《光学技术》2004年第4期473-474,477,共3页Optical Technique

摘　　要：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。The design and implementation of real-time image system of gastroscope are introduced. A pixel clock is generated by phase lock loop with high stability; large video-RAM is used for image cache; the image can be edited by the control of the writing to the video-RAM; video signal and S-video signal are output by the combined use of ADV7120 and AD722; one chip of EPM7128 is used to generate all the control signal. The whole system is made up of integrated devices which make it small and have good performance.

关 键 词：锁相环 视频编码 CPLD 视频RAM 

分 类 号：TN386.5[电子电信—物理电子学] TP391.41[自动化与计算机技术—计算机应用技术]