Patent ID: 7236435

Claim:
An apparatus for recording address information to a disc-shaped recording medium, comprising: means for generating address information comprised of a sync signal including a plurality of sync unit patterns, address data and an error correction code for the address data; a modulating means for generating two first signals and a second signal corresponding to the address information generated by the address information generating means, the second signal being formed in between the two first signals to separate the two first signals; and means for forming, on a disc-shaped recording medium, a spiral groove wobbled adaptively to the two first signals and the second signal generated by the modulating means; wherein said plurality of sync unit patterns are defined by an interval between the two first signals separated by the second signal, and wherein phases of a part of the groove wobbled adaptively to the two first signals are the same as each other and opposite to the groove wobbled monotonously adaptively to the second signal.