×

SYSTEMS AND METHODS FOR GATHERING RESEARCH DATA

  • US 20110208515A1
  • Filed: 03/11/2011
  • Published: 08/25/2011
  • Est. Priority Date: 09/27/2002
  • Status: Active Grant
First Claim
Patent Images

1. A method for obtaining information from an audio signal in a portable device, comprising the steps ofreceiving time domain audio data;

  • converting the time domain audio data to frequency domain data in the portable device, wherein the frequency domain data comprises a plurality of frequency bands of different sizes; and

    processing the frequency domain data according to frequency band size to (1) read an ancillary code and (2) extract a signature.

View all claims
  • 13 Assignments
Timeline View
Assignment View
    ×
    ×