| 摘要 |
An information-storage medium, which includes an optical disk (14) having a recording layer (16), comprises bar-code label (20) for indicating the properties of the layer, for external reference. In an information-processing apparatus (10), which comprises optical head (18) and information-processing circuit (24) for at least reproducing information on the layer of the medium (14) stated above, the circuit (24) includes bar-code reader (22) for reading the properties of the layer from the bar-code label (20) so that the circuit can perform at least information reproduction on the layer of the medium, in accordance with the properties of the layer, read by the bar-code reader, whereby information processing can be effected on various information-storage media , whose layers have different properties. |
