Patent ID: 7639584

Claim:
A computer-readable medium storing a data structure having recording speed information, the recording speed information comprising: a first information used to indicate a recording speed as a maximum recording speed; a second information used to indicate a recording speed as a minimum recording speed; a third information used to indicate a recording speed as a predetermined recording speed different from the maximum and minimum recording speeds; a fourth information used to indicate a recording speed as a basic recording speed; and applicable recording speed information indicating whether a specific recording speed is applicable to a recording medium or not, wherein at least one basic recording speed indicated by the fourth information has to be supported by a recording medium, wherein the applicable recording speed information indicates the each applicable recording speed in a bit position, and wherein the applicable recording speed information is configured in a manner that a bit for higher recording speed is set to indicate that a higher applicable recording speed is one of applicable and inapplicable if a bit for lower recording speed is set to indicate that a lower applicable recording speed is applicable, and the bit for the higher recording speed is set to indicate only that the higher applicable recording speed is inapplicable if the bit for lower recording speed is set to indicate that the lower applicable recording speed is inapplicable.