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Method and a system for identifying and verifying the content of multimedia documents

  • US 20030105739A1
  • Filed: 10/11/2002
  • Published: 06/05/2003
  • Est. Priority Date: 10/12/2001
  • Status: Abandoned Application
First Claim
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1. / A method of identifying and verifying the content of multimedia documents accessible in a distributed system having multiple entry points, the method being characterized in that it comprises:

  • a) a step of registering multimedia documents as identified works, this registration step comprising extracting a digital fingerprint from each multimedia document taken into consideration and storing said digital fingerprint in a database independent of the database in which the multimedia document might be archived, the digital fingerprint of the multimedia document under consideration comprising an ordered sequence of signatures in cascade resulting from multi-criterion analysis and breaking down into component parts of the multimedia document under consideration; and

    b) a step of verifying whether a given multimedia document accessible to the public constitutes authorized or unauthorized use of the registered work, this verification step comprising making successive comparisons using the signatures in cascade of the registered multimedia documents with corresponding signatures of the given multimedia document, the signature of the given multimedia document corresponding to an analysis criterion under consideration for a given comparison being computed immediately prior to making the comparison, and the following comparison being performed only if the previously compared signatures have revealed similarities, each comparison of signatures in cascade being performed only on the signatures of a group of registered multimedia documents whose previously-compared signatures have revealed similarities with the signatures of the given multimedia document, the final result of the last comparison enabling a report to be drawn up containing the list of registered multimedia documents that have revealed similarities with the given multimedia document as input.

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