DirectDraw技术在数字视频监控系统大屏VGA输出中的应用  

Application of DirectDraw Technology in Digital Video Surveillance System of VGA Output

作　　者：徐姣 于文学 魏立 

机构地区：[1]南自信息技术有限公司应用软件开发部,南京210012 [2]南京凯盛国际工程有限公司自电所,南京210036

出　　处：《中国公共安全（学术版）》2011年第3期114-117,共4页China Public Security(Academy Edition)

摘　　要：DirectDraw技术是DirectX中的最主要的一员,它可以直接对显存进行操作,具备硬件位图映射、硬件覆盖和换页的技术,在多媒体软件和游戏软件中得到了越来越多的应用和发展。本文介绍了一种在数字视频监控系统中,采用DirectDraw技术实现数字视频上大屏的设计和实现方案。该系统基于B/S架构,通过与前端设备建立网络连接,获取前端设备的视频数据,然后,借助显卡和VGA输出接口及DirectDraw技术,可以实现在多台显示器播放视频的功能。该系统可以根据需要和设置创建多个视频播放的窗口,每个播放窗口可实现多画面任意排列显示,亦可跨越多台显示器设备。Because of directly manipulate memory and the high efficiency in the hardware overlay bitmap mapping and paging technology＇ s, DirectDraw technology gets more and more software applications and development in multimedia and games software. This paper describes a digital video surveillance systems, using DirectDraw technology on large- screen digital video design and implementation. The system based on B/S architecture can get the video data of front-end equipment by connecting to the front-end device. Then with the video card and VGA outputs and DirectDraw technology that enables video playback in a multi-function monitors. Multiple video windows can be created according to the need and setting in this system. Each window can be played in any order multi-screen display and crossing multiple devices.

关 键 词：DIRECTDRAW 视频监控 VGA接口 多显示器 数字视频 

分 类 号：TN919.82[电子电信—通信与信息系统]