Patent ID: 7596075

Claim:
A mastering apparatus that records first digital information by irradiating a laser beam onto a master disk to record a pit sequence and that further records second digital information by wobbling the pit sequence, said mastering apparatus comprising: first signal generating means for generating a first signal by modulating the first digital information according to a required format; bit selecting means for, according to a relative position from a sync signal contained in the first signal, allocating a plurality of bits constituting the second digital information in a unit period of the same sync signal; and wobble modulating means for wobbling the pit sequence in both positive and negative directions according to an output of the bit selecting means, wherein the wobble modulating means wobbles the pit sequence in one of the positive and negative directions in a first period and wobbles the pit sequence in the other direction during a second period for each of the plurality of bits constituting the second digital information.