This paper introduces a digital signal processing system for video wall display system and discusses the applications of line interlace to line-by-line scan convertion technology and line inserting technology. 本文介绍了一种组合屏幕电视图象显示器(电视墙)的数字信号处理系统,并着重讨论了隔行扫描&逐行扫描的转换技术和行内插技术在系统中的应用。