Apparatus and method for compensating for tilt

An apparatus which compensates for tilt in an optical recording medium driver which drives an optical recording medium, the apparatus comprising:

• an optical pickup unit to generate a reproduction signal using the optical recording medium;
• a tilt adjuster to adjust the tilt of the optical pickup unit;
• a jitter detector to detect an amount of jitter in the reproduction signal;
• and
• a tilt controller which, when the detected amount of the jitter detected in a target track exceeds a reference value when the optical recording medium is reproduced and before performing the tilt compensation, controls tilt compensation in a direction towards/away from a track of the optical recording medium to be reproduced,
• wherein the reference value comprises:
• a first reference value where the detected amount of the jitter occurs after a seek operation, and
• a second reference value if the detected amounted of the jitter occurs where no seek operation is performed.

A method of compensating for tilt in an apparatus used to drive an optical recording medium, the method comprising:

• comparing a reference value with an amount of jitter detected over a certain period of time when the optical recording medium is reproduced;
• when the detected amount of the jitter exceeds the reference value and before performing the tilt compensation, determining a direction of tilt compensation to be in a direction towards/away from a track of the optical recording medium to be reproduced;
• and
• resuming reproduction of the optical recording medium after performing the tilt compensation so that the jitter decreases in the direction of the determined tilt compensation,
• wherein the reference value comprises:
• a first reference value where the detected amount of the jitter occurs after a seek operation, and
• a second reference value if the detected amounted of the jitter occurs where no seek operation is performed.

A method of compensating for tilt in an apparatus used to drive an optical recording medium, the method comprising:

• comparing a reference value with an amount of jitter detected in a target track where a track moves beyond a predetermined value when the optical recording medium is reproduced;
• before performing the tilt compensation and when the detected amount of jitter detected exceeds the reference value, determining a direction of tilt compensation to be in a direction towards/away from a track of the optical recording medium to be reproduced;
• and
• resuming reproduction of the optical recording medium after performing the tilt compensation so that the jitter decreases in the direction of the determined tilt compensation,
• wherein the reference value comprises:
• a first reference value where the detected amount of the jitter occurs after a seek operation, and
• a second reference value if the detected amounted of the jitter occurs where no seek operation is performed.

A recording and/or reproducing apparatus for use with an optical recording medium, the apparatus comprising:

• an optical pickup which generates a signal using the optical recording medium;
• a jitter detector which detects jitter in the generated signal;
• a controller which, prior to performing tilt compensation, selects a tilt compensation direction;
• and
• a tilt driver which drives the optical pickup to moves towards/away from a reproduced surface according to the selected tilt compensation direction,
• wherein the jitter is reduced as the optical pickup is moved in the selected tilt compensation direction,
• wherein the controller determines whether to perform the tilt compensation according to whether the detected jitter exceeds a reference value, and determines the tilt compensation direction when the detected jitter exceeds the reference value,
• wherein the reference value comprises:
• a first reference value where the detected jitter occurs after a seek operation, and
• a second reference value if the detected jitter occurs where no seek operation is performed.