Patent ID: 8023375
Filing Date: 2011-09-20
Classification: G11B

Abstract:
1. A recording/reproducing device comprising: an optical head unit which performs writing and reading of information expressed by marks and spaces on an optical recording medium by irradiating laser light onto the optical recording medium; a laser driving pulse generating unit that generates a laser driving pulse according to the recorded information to supply a laser driving signal to the optical head unit, and executes the irradiation of the laser light onto the optical head unit for recording; an evaluation value calculating unit that calculates a quality evaluation value, which is an index of recording signal quality based on a signal read from the optical recording medium by the optical head unit; and an adjustment controlling unit that performs an adjustment setting of the laser driving pulse generated in the laser driving pulse generating unit, wherein, with respect to waveform adjusting parameters for the laser driving pulse, after the adjustment controlling unit executes test writing for each waveform adjusting parameter by setting different waveform adjusting parameters in sequence, the adjustment controlling unit calculates a waveform adjusting parameter for the improvement of signal quality based on a result from reading of a signal for the test writing, and after the adjustment controlling unit executes test writing under a setting of each waveform adjusting parameter by setting a calculated waveform adjusting parameter calculated as such and a comparing target waveform adjusting parameter defined as a comparing object of the calculated waveform adjusting parameter in the laser driving pulse generating unit in sequence, the adjustment controlling unit determines whether the signal quality has been improved further in a case where the calculated waveform adjusting parameter is set than in a case where the comparing target waveform adjusting parameter is set based on a result from the acquisition of a quality evaluation value for the signal for the test writing by the evaluation value calculating unit to perform an adjustment setting of the laser driving pulse based on the determination result.