| 摘要 |
An optical disc apparatus in which a beta method using a beta value showing asymmetry of an amplitude of a reproduction signal or a kappa method using a modulation degree of the reproduction signal is executed as an evaluation method of evaluating recording quality of data in an optical disc, wherein: the data recorded by a recording power of a different intensity is reproduced; a beta value and a jitter value are obtained on the basis of the reproduced data, respectively; the beta method is selected as an evaluation method of evaluating the recording quality of the data in the optical disc under such a condition that the obtained beta value satisfies a predetermined requirement for the recording power of the different intensity; and a target beta value is set on the basis of the obtained jitter value when the beta method has been selected.
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