Syncmark detection failure recovery system
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United States of America Patent
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Dec 29, 2015
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N/A
app pub date -
Oct 2, 2014
filing date -
Oct 2, 2014
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Abstract
An apparatus for finding a syncmark in a data sector includes a syncmark detection circuit, decoder, fragment information table and syncmark recovery circuit. The syncmark detection circuit is operable to detect a syncmark in each of a number of fragments of the data sector and to compute a syncmark quality for each of the syncmarks. The decoder is operable to apply a data decoding algorithm to encoded data for the data sector. The encoded data has start points identified by the syncmark in each of the fragments. The fragment information table stores the syncmark quality for each of the syncmarks. The syncmark recovery sweeps the start points over search ranges for selected fragments for which the syncmark detection circuit failed to detect the syncmark and which have a lower syncmark quality than others of the fragments.
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