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Deriving multiple fingerprints from audio or video content

  • US 8,607,354 B2
  • Filed: 10/01/2007
  • Issued: 12/10/2013
  • Est. Priority Date: 04/20/2001
  • Status: Expired due to Term
First Claim
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1. A method comprising:

  • determining a first fingerprint of audio or video content;

    storing the first fingerprint in a database or record including information pertaining to a first user or first account;

    altering, using an electronic processor, the audio or video content to yield a different version of the audio or video content, wherein altering the audio or video content comprises randomly or pseudo-randomly filtering the audio or video content, wherein the alterations that yield the different version of the audio or video content are imperceptible to a listener;

    determining a second fingerprint of the different version of the audio or video content; and

    storing the second fingerprint in the database or record including information pertaining to a second user or second account.

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