Patent ID: 7414932

Claim:
An apparatus for manufacturing a disc comprising: means for generating address information indicating a position of address data composed of a sync signal including a plurality of sync unit patterns, address data, and error correction code for the address data, and means for forming, on the disc, a spiral groove wobbled based on an MSK modulation signal produced by MSK modulation of a carrier signal corresponding to the address information, the spiral groove including the sync signal including the plurality of sync unit patterns, the address data, and the error correction code for the address data, wherein said MSK modulation signal includes at least one non-modulated part and at least one modulated part, and wherein said at least one non-modulated part and at least one modulated part are allocated in a first order, corresponding to 1-bit data “0” of the address information, and said at least one non-modulated part and at least one modulated part are allocated in a second order, corresponding to 1 bit data “1” of the address information.