Method for calibrating a tracking error signal of an optical disk drive
First Claim
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1. A method for adjusting a tracking error signal of an optical disk drive, comprising:
- applying a pickup head control signal to move a pickup head to cross tracks of an optical disk during a calibration process, wherein the calibration process is performed prior to using the tracking error signal for controlling motion of the pickup head to a specified target position;
generating the tracking error signal;
sampling the tracking error signal and determining a characteristic value of the tracking error signal;
generating an adjustment signal according to the characteristic value and a target value;
adjusting the tracking error signal according to the adjustment signal to obtain an adjusted tracking error signal; and
generating a tracking control signal according to the adjusted tracking error signal to control the pickup head.
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Abstract
The invention provides a method for adjusting a tracking error signal of an optical disk drive. First, a pickup head control signal is applied to an actuator to move a pickup head. The tracking error signal is then generated while the pickup head moves. The tracking error signal is then sampled and a characteristic value of the tracking error signal is determined. An adjustment signal is then generated according to the characteristic value and a target value. Finally, the tracking error signal is adjusted according to the adjustment signal.
13 Citations
19 Claims
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1. A method for adjusting a tracking error signal of an optical disk drive, comprising:
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applying a pickup head control signal to move a pickup head to cross tracks of an optical disk during a calibration process, wherein the calibration process is performed prior to using the tracking error signal for controlling motion of the pickup head to a specified target position; generating the tracking error signal; sampling the tracking error signal and determining a characteristic value of the tracking error signal; generating an adjustment signal according to the characteristic value and a target value; adjusting the tracking error signal according to the adjustment signal to obtain an adjusted tracking error signal; and generating a tracking control signal according to the adjusted tracking error signal to control the pickup head. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An adjustment apparatus for adjusting a tracking error signal of an optical disk drive, comprising:
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a signal generator for generating a pickup head control signal; a pickup head driven by the pickup head control signal so as to cross tracks of an optical disk and generating the tracking error signal during a calibration process, wherein the calibration process is performed prior to using the tracking error signal for controlling motion of the pickup head to a specified target position; a sampling module for sampling the tracking error signal and determining a characteristic value of the tracking error signal; a comparator for generating an adjustment signal according to the characteristic value and a target value; a calibration module, adjusting the tracking error signal according to the adjustment signal to obtain an adjusted tracking error signal; and a compensator, generating a tracking control signal according to the adjusted tracking error signal to control the pickup head. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification