Method and apparatus for approximate pattern matching
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United States of America Patent
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Dec 22, 2009
Grant Date -
Nov 8, 2007
app pub date -
May 2, 2006
filing date -
May 2, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
A system and method for inspecting a data stream for data segments matching one or more patterns each having a predetermined allowable error, which includes filtering a data stream for a plurality of patterns of symbol combinations with a plurality of parallel filter mechanisms, detecting a plurality of potential pattern piece matches, identifying a plurality of potentially matching patterns, reducing the identified plurality of potentially matching patterns to a set of potentially matching patterns with a reduction stage, providing associated data and the reduced set of potentially matching patterns, each having an associated allowable error, to a verification stage, and verifying presence of a pattern match in the data stream from the plurality of patterns of symbol combinations and associated allowable errors with the verification stage.
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