| 摘要 |
According to one embodiment, a wobble signal detection circuit comprises a phase control unit configured to read out a phase-modulated wobble signal from an optical disk and control a phase of the wobble signal to be coincide with a phase of a reference signal, a calculating unit configured to calculate a first correlation value showing an integration result between a phase controlled wobble signal which is controlled by the phase control unit and the reference signal, and a second correlation value showing an integration result between the phase controlled wobble signal and a phase-inverted signal of the reference signal, and a polarity determining unit configured to determine a polarity of the phase controlled wobble signal based on the first and the second correlation value.
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