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US 7,623,424 B2Granted
Apparatus for identifying address in pregroove of Blue-ray disc
AssigneeMedia Tek Inc.
InventorsChun-Nan Chen, Wen-Yi Wu, Pi-Hai Liu
Life of this patent
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Abstract
An apparatus for identifying the address in pregroove (ADIP) of a Blu-ray disc is described. The apparatus uses a statistical scheme or distance-finding scheme to find the position of a predetermined minimum shift keying (MSK) mark or the first MSK mark, i.e. a bit sync unit, from an ADIP unit to identify data of the ADIP unit. The present invention doesn't have the error propagation effect occurring in the prior art so that the error rate for ADIP identification can be greatly reduced.
Claims6
An apparatus for identification of ADIP units, comprising:
- an MSK mark identifier to identify MSK marks of the ADIP units according to an estimation window and output MSK indication signals accordingly;
- an NWL number indicator to designate positions of the MSK marks according to the MSK indication signals and perform a position synchronization process according to an NWL sync signal;
- an MSK distance finder to find a predetermined MSK mark according to spacing distances between consecutive MSK marks and output the NWL sync signal accordingly;
- an ADIP unit decoder to identify the ADIP units according to the positions of the MSK marks;
- an NWL lock unit to declare an NWL lock status according to the positions of the MSK marks designated by the NWL number indicator and the NWL sync signal;
- and
- an estimating window issuer to set the estimating window,
- wherein the ADIP unit decoder identifies the ADIP units according to the positions of the MSK marks after the NWL lock status is declared.
5 more elements
An apparatus for identification of ADIP units, comprising:
- an MSK mark identifier to identify MSK marks of the ADIP units according to an estimation window and output MSK indication signals accordingly;
- an NWL number indicator to designate positions of the MSK marks according to the MSK indication signals and perform a position synchronization process according to an NWL sync signal;
- an MSK distance finder to find a predetermined MSK mark according to spacing distances between consecutive MSK marks and output the NWL sync signal accordingly;
- an ADIP unit decoder to identify the ADIP units according to the positions of the MSK marks;
- an ADIP sync word tracker to track a word sync unit and output an ADIP unit synchronization signal;
- an ADIP unit number indicator to designate positions of the ADIP units in a ADIP word and perform an ADIP unit synchronization process according to the ADIP unit synchronization signal;
- an ADIP lock unit to declare an ADIP unit lock status according to positions of the ADIP units designated by the ADIP unit number indicator and the ADIP unit synchronization signal;
- and
- an estimating window issuer to set the estimating window,
- wherein the ADIP unit decoder identifies the ADIP units according to the positions of the MSK marks after the ADIP unit lock status is declared.
7 more elements
An apparatus for identification of ADIP units, comprising:
- an MSK mark identifier to identify MSK marks of the ADIP units according to an estimation window and output MSK indication signals accordingly;
- an NWL number indicator to designate positions of the MSK marks according to the MSK indication signals and perform a position synchronization process according to an NWL sync signal;
- an MSK distance finder to find a predetermined MSK mark according to spacing distances between consecutive MSK marks and output the NWL sync signal accordingly;
- an ADIP unit decoder to identify the ADIP units according to the positions of the MSK marks;
- an ADIP sync word tracker to track a word sync unit and output an ADIP unit synchronization signal;
- an ADIP unit number indicator to designate positions of the ADIP units in a ADIP word and perform an ADIP unit synchronization process according to the ADIP unit synchronization signal;
- an ADIP word ECC decoder to decode a ADIP word having the ADIP units and output a success flag signal after successful decoding;
- an ADIP word lock unit to declare an ADIP word lock status according to the success flag signal;
- and
- an estimating window issuer to set the estimating window.
7 more elements
Dependencies are inferred from the claim text.