Patent ID: 7190644

Claim:
A track-locking method for an optical disk drive, comprising the steps of: detecting a tracking error (TE) signal; dividing a time period that a pickup head of the optical disk drive jumps from one track to another track into a first period, a second period, a third period and a zero period; presetting extreme values of a reshaped tracking error (TE′) signal in the first, second and third periods; reshaping the TE signal in the first period based on the preset extreme value of the TE′ signal in the first period and a peak value of the TE signal, so as to form the TE′ signal in the first period; establishing a line connecting the extreme values of the TE′ signal in the first period and the second period as the TE′ signal in the second period; and establishing a line connecting the extreme values of the TE′ signal in the second period and the third period to reshape the TE′ signal in the third period.