Patent ID: 6744718
Filing Date: 2004-06-01
Classification: G11B

Abstract:
A method of addressing physical identification information using wobble signals on an optical recording medium, the method comprising:phase modulating wobble address information indicating the physical identification information using the wobble signals; and recording the phase modulated wobble address information in one of a groove track and a land track, wherein the phase modulated wobble address information is recorded using the wobble signals having a predetermined phase relation so that the phase modulated wobble address information is readable from one of the groove and land track in which the phase modulated wobble address information is not recorded; wherein the optical recording medium has groove tracks divided into odd and even groove tracks and land tracks between the groove tracks, and the phase relation between the wobble signals is a phase difference between the wobble signals of one of the even groove tracks and an adjacent one of the odd groove tracks of 90 degrees, so that a signal read from one of the land tracks between the one even groove track and the adjacent odd groove track is a quadrature phase shift keying (QPSK) signal.