METHOD FOR ADJUSTING TILT OF INFORMATION RECORDING MEDIUM AND INFORMATION RECORDING/REPRODUCING DEVICE FOR SUCH METHOD

摘要

Ina method for adjusting a tilt of an information recoding medium, the information recording medium is provided with tracks in parallel and some of the tracks are set as a measuring track group. A reproduction signal is outputted by reproducing information recorded in the tracks arranged at both ends of the measuring track group. Based on the reproduction signal, a tilt indicating the tilt of the information recording medium is calculated. Based on the calculated tilt, the tilt of the information recording medium is corrected. In the track or the track group adjacent to the measuring track group, information is not recorded. Thus, the tilt can be accurately detected by directly using the reproduction signal.