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自从80年代初荷兰菲利浦公司与日本索尼公司联合推出可长时间播放音乐节目的光盘系统以来,新型的光盘不断问世。性能也从以前只能存储音频信号,发展到存储音频、视频、影像、数据、动画等多种信号,并逐步在行业中应用。 光盘技术的迅速发展,与其显著的、无可比拟的优点分不开。 第一,存储量大。一张直径12厘米、厚0.15厘米、重15克的光盘,存储量可达680兆字节,相当于560余张1.2兆的高密软磁盘。 第二,可靠性高。CD—ROM是只读存储光盘的缩写。计算机在使用这种光盘时,只能随时读出光盘中的各类信息,而不能修改光盘中的信息。同时,光盘也不会象磁带和磁盘那样,在使用中受到磁头的磨损及周围磁场
Since the early 1980s, the Philips of Holland and Sony of Japan jointly launched a CD-ROM system that can play music for a long time. Since then, a new type of CD has been released. From the previous performance can only store audio signals, the development of storage audio, video, video, data, animation and other signals, and gradually applied in the industry. The rapid development of optical disc technology is inseparable from its remarkable and unparalleled advantages. First, the storage capacity. A diameter of 12 cm, 0.15 cm thick, 15 grams of weight discs, storage capacity up to 680 megabytes, equivalent to more than 560 pieces of 1.2 trillion high density floppy disk. Second, high reliability. CD-ROM is an acronym for CD-ROMs. When a computer uses such a disc, it can only read various types of information in the disc at any time, but can not modify the information in the disc. At the same time, the disc will not be as magnetic tape and disk, in use by the head wear and the surrounding magnetic field