Recording medium, data recording method and apparatus, data regenerating method and apparatus, and copy control method

摘要

Data is recorded in a first part PA 1 in accordance with a signal format same as that of an existing CD at the lower limit (1.5 mum) of an allowable value of a track pitch and the lower limit (1.2 m/sec) of a linear velocity. As a result, the data for the maximum regeneration time (74.7 min) can be recorded in the first part PA 1 . An existing CD reproducing apparatus can reproduce the audio data recorded in the first part PA 1 with no problem. Moreover, compressed and encrypted audio data is recorded in a second part PA 2 at a single density or a double density. The single density represents a recording density same as that of an existing CD and the double density represents a density two time larger than the single density. Furthermore, the audio data recorded in the second part PA 2 is charged when reproduced in order to protect copyrights. The format of the data recorded in the second part PA 2 uses the format of a CD-ROM.