| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a multilayer optical information medium and a recording and reading apparatus therefor capable of easily acquiring address information of information layers (recording layers) even when the number of layers of the information layers (recording layers) in the multilayer information medium having three or more layers are different, and to provide a program for making the recording and reading apparatus execute writing and reading. <P>SOLUTION: The multilayer optical information medium includes three or more information layers. Address information indicating positions in each of the information layers is recorded in a helical manner. The information layers comprise at least one I to O layer in which values representing addresses in the address information increase from an inner perimeter section toward an outer perimeter section, and at least one O to I layer in which the values representing the addresses in the address information increase from the outer perimeter section toward the inner perimeter section. All of the I to O layers have substantially the same address information and all of the O to I layers have substantially the same address information. Layer specifying information specifying the information layer is attached to the address information. <P>COPYRIGHT: (C)2009,JPO&INPIT |
