摘要
本文对ＴＶＧＡ卡的视频ＤＡＣ及ＶＲＡＭ结构进行了分析，讨论了ＴＶＧＡ的６４级黑白灰度过设置和一种能增强ＴＶＧＡ卡的灰度表达能力的半调技术，在微机彩色显示器上用软件编程的方法实现图象的半调灰度显示。
Abstract： The 64 grey levels setting scheme is described and analysed on the basis ofvideo DAC and VRAM structures of TVGA cards. A valid half-tone scheme is presented toincrease the number of grey levels on TVGA cards．It can greatly enhance the ability of mi-crocomputer color CRT to display the grey images by soft-programming.
出处
《电讯技术》
北大核心
1995年第3期39-43,共5页
Telecommunication Engineering
