Patent ID: 7701827
Filing Date: 2010-04-20
Classification: G11B

Abstract:
1. A method for determining a recording signal of a recorder to record data onto a disc, the recording signal comprising a top pulse having a first power value Ph, the method comprising: selecting an initial first power value of the top pulse stored in the recorder; generating first test power values based on the initial first power value to record test data onto the disc; detecting concentricity parameters PS corresponding to the first test power values, the concentricity parameters PS being used for describing a concentricity of pits and lands; quadratic curve fitting the concentricity parameters PS and the first test power values employing the following quadratic curve fitting equation: PS=A(Ph−B) determining an optimum value of the first power value Ph, this optimum value equals to B; and storing the optimum value to be used for recording the data onto the disc.