Patent ID: 6111836
Filing Date: 2000-08-29
Classification: G11B,H03M

Abstract:
An apparatus for writing data on and reading data from an overwritable optical recording medium having a sector format, comprising:a modulator portion modulating data to make a modulated data signal corresponding to a record pattern of an optical recording medium;a synchronizing signal generating portion generating a synchronizing signal to be added before the modulated data signal;a delay portion performing a first function of delaying a start point for writing the modulated data signal into a sector on an optical recording medium at random within a first variation range, and a second function of delaying a start point for writing the modulated data signal into a sector on an optical recording medium at random within a second variation range that is larger than the first variation range; anda switching portion selecting one of the first function and the second function of the delay portion;wherein a start point for writing the synchronizing signal on an optical recording medium is delayed within a synchronizing signal variation range that is smaller than a variation range of a start point for writing the modulated data signal, and the synchronizing signal variation range is a range of one byte.