Patent ID: 6097682
Filing Date: 2000-08-01
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, andwherein a starting point of a gap portion formed before the start point for writing the synchronizing signal on the optical recording medium is fixed when the synchronizing signal and the modulated data signal are written on an optical recording medium.