基于TW2824的视频监视及OSD叠加  

Video Surveillance and OSD Overlay Based on TW2824

作　　者：赵崇昆[1] 陈德智[1] 

机构地区：[1]华东师范大学,上海200062

出　　处：《现代电子技术》2008年第14期111-112,共2页Modern Electronics Technique

摘　　要：在实际应用中,有对多路摄像信号采集并在一个显示设备中分割区域显示多幅图像及添加相应OSD字符信息的需要,TW2824是一款强大的视频控制器。以采集2路全电视信号为例,详细叙述由单片机控制,运用TW2824采集2路视频信号,经内部视频控制分割显示到1块液晶屏中的原理过程。详细叙述利用TW2824支持的OSD覆盖技术,在视频层上添加中英文字符OSD覆盖的原理过程。最终实现在一个液晶屏上监视显示2个模拟视频源信号,并叠加相应的中英文字符信息。There is a need in our actual application to acquire multi- path video signals and display these video signals in one display equipmen and they may be overlayed with some OSD character. TW2824 is a powerful video controller. Taking displaying two path CVBS signals for example, how to acquire two path video signals and display the two signals in one LCD panel, and how to add Chinese and English character overlays over the video layer are described. Ultimately monitor and display two analog video signals in one LCD panel, with corresponding Chinese and English character information OSD over the video layer.

关 键 词：视频处理 在屏显示 点阵字库 画面分割 I^2C PAL NTSC 

分 类 号：TP391.8[自动化与计算机技术—计算机应用技术]