一、概述数字图象存储器是实时图象处理系统中的一个重要部件。其作用是作为主机与图象输入输出设备之间的缓冲器。由于系统所用的一般计算机,即使采用直接存储器存取(下面简称DMA)方式,其速率也不能满足实时图象处理的要求。而数字图象存储器既可作为电视图象实时输入的缓存,又可以用DMA方式与计算机内存交换数据,将计算机处理后的图象数据经存储器刷新显示。 I. Overview Digital image memory is an important part of real-time image processing system. Its role as a host and image input and output devices between the buffer. Due to the general computer used in the system, even at the direct memory access (hereinafter referred to as DMA) method, its speed can not meet the requirements of real-time image processing. The digital image memory can not only be used as a real-time input buffer of the television image, but also exchange data with the computer memory by using the DMA method, and refresh the image data processed by the computer through the memory.