多功能电视墙数字控制电路的设计要点

Digital Control Circuit Design of Multi-screen Displaying System

多功能电视墙系统包括３个主要部分──微机控制部分、电源及驱动电路、多屏组合显示部分。本文详细介绍微机控制电路的设计方法。Ｎ×Ｎ电视墙微机控制部分的主要任务是将完整的活动画面实时分割成Ｎ２个块，由于活动视频图像变化很快，采样的数据很多以及超过６０个特技功能，因此微机控制部分较复杂。其关键技术在于将数据图像信号以一定的方式适时地存入ＲＡＭ及适时读出显示。

The foundation of N × N multi-screen displaying system is to divide an active TV picture into NZ parts. Because of the rapid changing of television signals, large amount data sampled and over 60 functions,the microcomputer controlling part is relatively complex. The key techniques are saving the digital image signals into the RAM and determining the right time to read and write them. This paper tries to describe the designing procedure of the microcomputer controlling part.