Apparatus for identifying address in pregroove of Blue-ray disc
AssigneeMedia Tek Inc.
InventorsChun-Nan Chen, Wen-Yi Wu, Pi-Hai Liu
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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.
Claims28
An apparatus for identification of address-in-pregroove (ADIP) units, comprising:
- a minimum shift keying (MSK) mark identifier to identify MSK marks of the ADIP units according to an estimation window and output MSK indication signals accordingly;
- a nominal wobble length (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 position statistic analyzer to count the MSK marks occurring at the same positions to find a predetermined MSK mark and output the NWL sync signal accordingly;
- and
- an ADIP unit decoder to identify the ADIP units according to the positions of the MSK marks.
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 position statistic analyzer to count the MSK marks occurring at the same positions to find a first MSK mark and output the NWL sync signal accordingly;
- and
- an ADIP unit decoder to identify the ADIP units according to the positions of the MSK marks.
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;
- and
- an ADIP unit decoder to identify the ADIP units according to the positions of the MSK marks.
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 first MSK mark according to spacing distances between consecutive MSK marks and output the NWL sync signal accordingly;
- and
- an ADIP unit decoder to identify the ADIP units according to the positions of the MSK marks.
Dependencies are inferred from the claim text.