Optical disc device

摘要

The present invention provides an optical disc device capable of performing appropriate adjustment of an off-track level. The optical disc device comprises an envelope signal generation unit 104 for generating an envelope signal on the basis of a RF signal from an optical pickup; an off-track signal generation unit 105 for binarizing the envelope signal with the off-track level as a slice level to generate an off-track signal; an off-track measurement unit 106 for measuring high level periods and low level periods of the off-track signal; and an off-track level adjustment unit 109 for adjusting the off-track level which is set on the off-track signal generation unit 105, on the basis of the ratio between the high level periods and the low level periods.