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Methods and devices employing content identifiers

  • US 7,792,325 B2
  • Filed: 02/06/2007
  • Issued: 09/07/2010
  • Est. Priority Date: 05/19/1999
  • Status: Expired due to Fees
First Claim
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1. A method comprising:

  • at a first computer, receiving from a first device a first content identifier previously determined through a first type of operation;

    at said first computer, receiving from a second device a second content identifier previously determined through a second type of operation different than the first;

    from said first computer, forwarding at least part of said first content identifier to a second computer, based on a class to which said first content identifier belongs;

    from said first computer, forwarding at least part of said second content identifier to a third computer, based on a class to which said second content identifier belongs;

    at said first device, receiving first metadata corresponding to the first content identifier, from a first metadata source; and

    at said second device, receiving second metadata corresponding to the second content identifier, from a second metadata source different than the first metadata source.

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