Patent ID: 6973018

Claim:
A method of correcting a tilt in a DVD player, comprising the steps of: monitoring jitter values while adjusting a turntable or guide rail after a wobble disc, which is manufactured to form a reference tilt of a wobble angle “theta” between the disc and the turntable, is placed on the turntable; determining whether depths of valleys of monitored jitter values are different, determining that the reference tilt is a radial tilt if it is determined that the depths of valleys of monitored jitter values are different, and correcting the radial tilt; and if it is determined that the depths of valleys of monitored jitter values are not different, determining whether the heights of peaks of monitored jitter values are different, determining that the reference tilt is a tangential tilt if it is determined that the heights of peaks of monitored jitter values are different, and correcting the tangential tilt.