Patent ID: 7342864
Filing Date: 2008-03-11
Classification: G11B

Abstract:
1. An optical disk reproduction apparatus comprising: a wobble signal reading unit configured to read a signal corresponding to a wobble formed at a predetermined track from an optical disk on which address information is recorded by applying phase modulation to the wobble formed at the track; an address information reproducing unit configured to reproduce the address information by applying phase detecting processing to the wobble signal read at the wobble signal reading unit, and by binarizing an amplitude of an obtained phase detection signal by being compared with a predetermined threshold value; a correcting unit configured to correct asymmetry of the amplitude generated in the phase detection signal obtained at the address information reproducing unit with respect to the predetermined threshold value at the time of reading the wobble signal from the predetermined track by the wobble signal reading unit; the correcting unit includes the offset detecting unit includes