双存储器结构实现雷达余辉显示  

Implementing Persistence of Radar Displaying with Dual Memory Structure

作　　者：欧阳宁[1] 张彤[2] 韩传久[1] 

机构地区：[1]桂林电子工业学院通信与信息工程系,广西桂林541004 [2]桂林电子工业学院机电与交通工程系,广西桂林541004

出　　处：《桂林电子工业学院学报》2002年第5期45-47,共3页Journal of Guilin Institute of Electronic Technology

摘　　要：雷达光栅扫描显示器显示一次视频信号时 ,实现类似随机扫描体制中的余辉显示是一个难点 ,特别对于一次视频数据率较高的雷达显示器更加难以实现。利用通用双口 RAM和专用 VRAM构成的双存储器结构能方便快捷地实现余辉显示 ,能解决单存储器结构实现中时序控制逻辑复杂和余辉速度慢的问题 ,并且可以获得连续。Implementing persistence of raw video in radar raster-scan-display is harder than in random-scan-display,especially in displays that have high-speed rate of raw video data.However,by means of a dual-memory-structure composed of dual-port RAM and special video RAM the persistence can be implemented easily.Such a structure can also solve the problems of slow-speed of persistence and complicated control circuit,which arise from the single-memory-structure.What's more,this structure can display frames continuously,smoothly and steadily.

关 键 词：双存储器结构 雷达 余辉显示 光栅扫描显示 双口RAM 专用VRAM 

分 类 号：TN957.7[电子电信—信号与信息处理]