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一、概述未来的21世纪将是正规的多媒体社会,在这个社会里,不仅有文字、静止图像,而且有声音、活动图像之类各种各样大量的信息。这些信息,由于数字化就使得原来依赖于应用领域的界限消失,成为在出版、广播、通信等产业及个人等各种关系中共有的信息。为了使任何人都可以在必要的时间和必要的场所简单地使用这些信息,就要求有能够正确地迅速处理各种各样大量信息的媒体。从近些年来的发展看,这些媒体从本身的性质分,大致有 ROM 和 RAM 两大类;从媒体所载的信息类别看,大致有声音、图像、情报三大类。
I. Overview The 21st century will be a formal multimedia society. In this society, there are not only text and still images, but also a great variety of information such as voices and moving images. As a result of digitization, these messages make the boundary originally dependent on the application field disappear, becoming the common information in various relations such as publishing, broadcasting and communications industries and individuals. In order for anyone to simply use this information at the right time and wherever it is needed, it requires media that can handle all kinds of vast amounts of information quickly and correctly. Judging from the development in recent years, these media are divided into two major categories, ROM and RAM, from their own nature. From the information categories contained in the media, there are generally three major categories of audio, image and intelligence.