Patent ID: 8068392

Claim:
A recording method comprising the steps of: (a) generating a plurality of pulse sequences for recording data to a recording medium corresponding to a plurality of linear velocities of rotation of the recording medium in the range va to vb; va being the lowest linear velocity; vb being the highest linear velocity, wherein each one of said plurality of pulse sequences having a starting pulse and a terminating pulse, the starting pulse being provided at a beginning thereof and the terminating pulse being provided at the end thereof; wherein the step (a) comprises the steps of: (a-1) providing, for each of the recording parameters, corresponding recording parameter values PCv 1 and PCv 2 for linear velocities v 1 and v 2 respectively, wherein v 1 and v 2 are linear velocities satisfying the relationship va≦v 1 <v 2 ≦vb; (a-2) setting, for each of the recording parameters, the corresponding recording parameter values PCv 1 and PCv 2 ; (a-3) performing learning using said linear velocity v 1 and the corresponding recording parameter value PCv 1 and optimizing, for said linear velocity v 1 , to obtain a corresponding optimum recording parameter value PMv 1 for each of the recording parameters; (a-4) performing learning using said linear velocity v 2 and the corresponding recording parameter value PCv 2 and optimizing, for said linear velocity v 2 , to obtain a corresponding optimum recording parameter value PMv 2 for each of the recording parameters; (a-5) obtaining recording parameters corresponding to an arbitrary linear velocity v by using a corresponding recording parameter approximation function h(v) obtained based on PMv 1 and PMv 2 ; (b) while rotating a recording medium with a linear velocity v selected from the plurality of linear velocities in the range va to vb, forming at least one of a recording mark and a space by irradiating the recording medium with a pulse sequence selected from the plurality of pulse sequences, wherein the pulse sequence is determined by a set of recording parameters calculated from the corresponding recording parameter approximation function h(v).