The CD-ROM was specified with the following goal: it should serve to hold uncompressed CD-DA data. This goal is achieved by introducing two modes: mode 1 and mode 2.

• ROM规范要求达到以下目的，它必须存储未经压缩的CD-DA数据和计算机数据。为了达到这个目的，引入两个模式：模式1和模式2。