Patent ID: 6031800
Filing Date: 2000-02-29
Classification: G11B,H03M

Abstract:
A method for writing data on and reading data from an overwritable optical recording medium having a sector format, the method comprising the steps of:modulating write data to make a modulated data signal corresponding to a record pattern of the optical recording medium;selecting one of a first record timing and a second record timing;changing a start point for writing the modulated data signal into a sector on the optical recording medium at random within a first variation range when the first record timing is selected;changing a start point for writing the modulated data signal into a sector on the optical recording medium at random within a second variation range that is larger than the first variation range when the second record timing is selected; andchanging a start point for writing a synchronizing signal on an optical recording medium within a synchronizing signal variation range;wherein the synchronizing signal variation range is smaller than a variation range of a start point for writing the modulated data signal.