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METHODS AND APPARATUS TO ENCODE AND DECODE AUDIO FOR SHOPPER LOCATION AND ADVERTISEMENT PRESENTATION TRACKING

  • US 20100134278A1
  • Filed: 11/25/2009
  • Published: 06/03/2010
  • Est. Priority Date: 11/26/2008
  • Status: Active Grant
First Claim
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1. A method for tracking a shopper, the method comprising:

  • receiving a first audio signal at a first location with a decoder attached to a shopping implement;

    determining a first code encoded in the first audio signal;

    receiving a second audio signal at a second location with the decoder;

    determining a second code encoded in the first audio signal; and

    transmitting the first code and the second code to a data retrieval device.

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