Patent ID: 9454985
Filing Date: 2016-09-27
CPC Classification: G11B

Claim Text:
1. An optical disc medium comprising a land and a groove at which information can be recorded, wherein a predetermined number of address information units which record address information of the land or groove are provided in a circumferential direction of the optical disc medium, each address information unit of the land includes a plurality of unit areas, each unit area includes three or more types of address recording areas capable of recording address information, each type of address recording area is an address recording area that has a predetermined circumferential position in the circumferential direction at which the address information is recorded that is different from the predetermined circumferential position of the other types of address recording areas, the address information for each address information unit is recorded on the same type of address recording area selected from among the three or more types of address recording areas, the address information unit of the land has address information which is recorded, in the same modulation, on the side of the inner adjacent groove and on the side of the outer adjacent groove, and the type of the area to be selected from among the three or more types of address recording areas for recording the address information of the land is different among three address information units adjacently arranged in a radial direction.