Patent ID: 7394750
Filing Date: 2008-07-01
Classification: G11B

Abstract:
1. An information recording medium on which a wobble is formed by displacing a record mark position in a direction crossing a spiral standard locus according to record data, wherein the wobble is formed such that an average value of displacement of the record mark position with the standard locus as a reference is zero for each predetermined data unit of the record data, the wobble corresponding to the predetermined data unit comprises: a first area; and a second area, wherein the average value of the displacement of the record mark position with the standard locus as a reference in the second area is set to cancel the average value of the displacement of the record mark position with the standard locus as a reference in the first area, the record data corresponding to the predetermined data unit comprises: main data; and cancel data having a DC offset value to cancel a DC offset value of the main data, the record mark position in the first area is displaced according to the main data with the standard locus as a reference, and the record mark position in the second area is displaced according to the cancel data with the standard locus as a reference.