Method and apparatus for retry calculation in an optical disk device
First Claim
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1. A method for determining a maximum number of attempted retry operations when a read error occurs in an optical disk device, the method comprising the steps of:
- receiving an RF signal from a pickup of the optical disk device;
detecting an envelope of the RF signal;
asserting a defect signal when a level of the envelope is lower than a predetermined threshold;
generating interrupt pulses during the assertion of the defect signal; and
determining the maximum number of attempted retry operations according to the interrupt pulses.
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Abstract
A method for determining a maximum number of attempted retry operations when a read error occurs in an optical disk device. The method includes the steps of receiving an RF signal from a pickup of the optical disk device, detecting an envelope of the RF signal, asserting a defect signal when a level of the envelope is lower than a predetermined threshold, generating interrupt pulses during the assertion of the defect signal, and determining the maximum number of attempted retry operations using the interrupt pulses.
68 Citations
18 Claims
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1. A method for determining a maximum number of attempted retry operations when a read error occurs in an optical disk device, the method comprising the steps of:
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receiving an RF signal from a pickup of the optical disk device; detecting an envelope of the RF signal; asserting a defect signal when a level of the envelope is lower than a predetermined threshold; generating interrupt pulses during the assertion of the defect signal; and determining the maximum number of attempted retry operations according to the interrupt pulses. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus for determining a maximum number of attempted retry operations when a read error occurs in an optical disk device, the apparatus comprising:
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an RF signal processor for both receiving and amplifying an RF signal from a pickup of the optical disk device; an envelope detector for outputting an envelope of the RF signal according to the results of the RF signal processor; an defect detector for both asserting a defect signal when a level of the envelope is lower than a predetermined threshold and for generating interrupt pulses during the assertion of the defect signal, wherein the defect detector receives the output of the envelop detector; and a system controller for determining the maximum number of attempted retry operations according to the interrupt pulses, wherein the system controller receives the output of the defect detector. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification