Device for accessing address information in an optical disc
AssigneeMediatek Incorporation
InventorsPi-Hai Liu, Chun-Nan Chen
Life of this patent
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Abstract
An address-accessing device includes first and second information generators for producing first and second information according to the received address signals; a phase offset detector for producing a phase offset according to the first and second information; a reference signal generator for producing a reference signal according to the phase offset, the first information and the second information; and a decoder used to determine the structure type of an address-in-pregroove unit (ADIP) according to the reference value. This address-accessing device is capable of adjusting the decision level and the phase offset automatically to lower the error rate occurring in the address access procedure.
Claims38
A device for accessing address information in an optical disc, comprising:
- a matching unit for calculating matched values corresponding to a received address signal according to a matching signal;
- a sum & sampling unit for summing up the matched values obtained within a predetermined time period to produce a reference signal;
- a decision level adjustment unit capable of using the matched values provided by the matching unit to calculate a decision level;
- and
- a decoder used to determine a structure type of an address-in-pregroove (ADIP) unit according to the reference value and the decision level.
A device for accessing address information in an optical disc, comprising:
- a first information generator for producing a first information according to received address signals;
- a second information generator for producing a second information according to the received address signals;
- a phase offset detector for producing a phase offset according to the first information and the second information;
- a reference signal generator for producing a reference signal according to the phase offset, the first information and the second information;
- and
- a decoder used to determine a structure type of an ADIP unit according to the reference value.
A device for accessing address information in an optical disc, comprising:
- a first information generator for producing a first information according to received address signals;
- a second information generator for producing a second information according to the received address signals;
- an adjustment signal generator for producing at least an adjustment parameter according to the first information and the second information;
- a reference signal generator for producing a reference signal according to the adjustment parameter, the first information and the second information;
- and
- a decoder used to determine a structure type of an ADIP unit according to the reference value.
Dependencies are inferred from the claim text.