Patent ID: 8102745

Claim:
A method of recording or reproducing data on or from an optical disc, comprising: identifying control information, the control information including disc size information indicating a diameter of the optical disc and disc version information indicating a disc version within the control information, the disc version information identifying a read/record compatibility, the disc version information being separated into a first version information and a second version information, wherein the disc size information and the disc version information are recorded together in one information byte within the control information, wherein 2-bits are allocated to the disc size information, 2-bits are allocated to the first version information, and 4-bits are allocated to the second version information, wherein the first version information is sequentially increased if a physical attribute of the optical disc is changed to a first predetermined range having no read/record compatibility, and the second version information is sequentially increased if the physical attribute of the optical disc is changed to a second predetermined range different from the first predetermined range; and reading or recording the data based on the identified control information.