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Parallel pattern detection engine

  • US 7,502,875 B2
  • Filed: 03/06/2007
  • Issued: 03/10/2009
  • Est. Priority Date: 01/14/2004
  • Status: Expired due to Fees
First Claim
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1. A method to recognize objects comprising:

  • providing a database of patterns representative of objects to be recognized;

    storing an operation code in a predefined sector of said database;

    generating a data stream representative of unknown objects;

    providing an address pointer to select one or more of said patterns in said database;

    correlating a pattern selected from said patterns in said database with a block of data from said data stream; and

    generating a status signal based upon a result of the correlation and the operation code stored with the selected pattern, wherein the operation code contains flag bits, wherein said flag bits indicate one of a single wildcard matching operation, a multiple wildcard matching operation, a last matching operation and an inverse matching operation, wherein if said flag bits contain bits indicating said single wildcard matching operation then a match is indicated if a byte in said data stream matches a byte with said single wildcard operation code, wherein if said flag bits contain bits indicating said multiple wildcard operation then a match is indicated if an indeterminate number of bytes in said data stream does not match a byte with said multiple wildcard operation code, wherein if said flag bits contain bits indicating said inverse matching operation then a match is indicated if every byte except a byte with said inverse operation code matches a byte in said data stream, wherein if said flag bits contain bits indicating said last matching operation then a match is indicated if a byte in said data stream is a last byte in a pattern.

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