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Combined watermarking and fingerprinting

  • US 8,300,884 B2
  • Filed: 05/21/2010
  • Issued: 10/30/2012
  • Est. Priority Date: 05/21/2009
  • Status: Active Grant
First Claim
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1. A content recognition method comprising:

  • using a programmed processor to perform the acts of;

    computing a fingerprint for a received portion of a content signal;

    sending the fingerprint to a reference database to identify the content signal, the reference database providing identity by matching the fingerprint with reference fingerprints in the database;

    based on the identity, obtaining a reference copy of the content signal; and

    determining distortion of the received portion of the content signal based on a comparative analysis between the received portion and the reference copy.

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