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CD-ROM是CompactDisc-ReadonlyMemory的缩写。意为具有小型激光数码唱片格式的只读式光盘存储器,或简称为只读光盘存储器。由于CD-ROM光盘具有记录容量大、操作简单,价格低和应用广等特点,自1983年在日本问世以来,已受到高度重视。一、CD-ROM光盘数据的处理为了使CD-ROM光盘装置能达到计算机所要求的性能,对记录在CD-ROM光盘上的数据进行编码调制和对读取信号进行检/纠错处理,其要求均十分严格。这里仅简述EFM调制、数据块的构成和CIRC等几个问题。
CD-ROM is CompactDisc-ReadonlyMemory acronym. This means a CD-ROM with compact laser digital recording format, or simply CD-ROM. Since CD-ROM discs with large recording capacity, simple operation, low price and wide application, etc., have been highly valued since they came out in Japan in 1983. 1. Processing of CD-ROM Disc Data In order to enable the CD-ROM disc apparatus to achieve the desired performance of the computer, the data recorded on the CD-ROM disc is encoded and modulated, and the read signal is subjected to error detection and correction The requirements are very strict. Here only briefly EFM modulation, the composition of the data block and CIRC several issues.