摘要
视频字符叠加器是在视频信号中混入字符信号,从而在屏幕的特定位置上与图像信号同时进行显示的设备。该文介绍了字符叠加的原理和方法,重点介绍了用FPGA实现的过程,最后给出了实现效果。基于FPGA字符叠加解决方案具有控制灵活、结构简单、集成度高、价格便宜的优点,值得推广。
OSD（On_Screen Display） device can overlap user defined messages on the screen,such as characters,cursor and so on.This arti-cle has an introduction about the mechanism,especially about how to process with FPGA.Finally,it illustrates the implementation.It de-serves us to generalize the solution base on FPGA,because there are many advantages,such as flexible control,simple configuration,low cost,high density,and so on.
作者
赵凤怡
ZHAO Feng-yi（Department of Communication Engineering,Wuhan Media and Communications College of Huazhong Normal University,Wuhan 430205,China）
出处
《电脑知识与技术》
2010年第5期3529-3530,共2页
Computer Knowledge and Technology
关键词
OSD
FPGA
屏幕存储映像
字符叠加
mif文件
on_screen display
field programmable gate array
screen memory map
characters overlap
memory initial file
