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US 2014/0237329 A1Published application
Ratio-Adjustable Sync Mark Detection System
AssigneeLSI Corporation
InventorsRui Cao, Yu Kou, Shaohua Yang
Life of this patent
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Abstract
Systems, methods, devices, circuits for data processing, and more particularly to systems and methods for detecting a sync mark with a ratio-adjustable detection system.
Claims20
A data processing circuit comprising:
- a pattern match calculation circuit operable to calculate a plurality of metrics representing a difference between a data sequence and each of a plurality of possible data patterns, wherein one of the plurality of possible data patterns comprises a target data pattern and a remainder of the plurality of possible data patterns each comprise a subset of the target data pattern, and wherein a primary metric from the plurality of metrics corresponds to the difference between the data sequence and the target data pattern;
- and
- an indication circuit operable to compare the primary metric with each of the plurality of metrics other than the primary metric, wherein at least one of the plurality of metrics is scaled, and wherein the indication circuit is operable to assert a target data pattern found signal based at least in part on the comparisons.
A method for detecting a target data pattern, comprising:
- receiving an input data sequence;
- calculating a first metric representing a difference between the input data sequence and a target data pattern;
- calculating at least one second metric representing a difference between the input data sequence and a second data sequence including a subset of the target data pattern;
- scaling at least one of the first metric and the at least one second metric by a scaling factor;
- comparing the first metric and the at least one second metric;
- and
- indicating that the target data pattern has been detected in the input data sequence based at least in part on the comparing.
4 more elements
A storage device, comprising:
- a storage medium;
- a head assembly disposed in relation to the storage medium and operable to provide a sensed signal corresponding to a data set on the storage medium;
- and
- a read channel circuit including a sync mark detector, comprising:
- a pattern match calculation circuit operable to calculate a plurality of metrics representing a difference between a data sequence derived from the sensed signal and each of a plurality of possible data patterns, wherein one of the plurality of possible data patterns comprises a target data pattern and a remainder of the plurality of possible data patterns each comprise a subset of the target data pattern, and wherein a primary metric from the plurality of metrics corresponds to the difference between the data sequence and the target data pattern;
- and
- an indication circuit operable to compare the primary metric with each of the plurality of metrics other than the primary metric, wherein at least one of the plurality of metrics is scaled, and wherein the indication circuit is operable to assert a target data pattern found signal based at least in part on the comparisons.
4 more elements
Dependencies are inferred from the claim text.