| 摘要 |
An optical disk apparatus includes an error arithmetic circuit which detects the relative position between the position of an LPP portion and data which is being recorded, switching units which switch a reference clock source to change the frequency of a correction clock output from a PLL unit to generate a data recording clock for a predetermined time on the basis of the direction and magnitude of a shift in the relative position between the data being recorded and the position of the LPP portion, which is detected by the error arithmetic circuit, and a control device which changes the frequency of the correction clock for a predetermined time.
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