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Method and apparatus for automatic detection and identification of broadcast audio and video signals

  • US 20070168409A1
  • Filed: 02/16/2005
  • Published: 07/19/2007
  • Est. Priority Date: 02/26/2004
  • Status: Active Grant
First Claim
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1. A method executed by a digital signal processing system of generating a signature associated with a lnown signal, the signature comprised of a set of numeric values of at least one element and corresponding to at least one time frame of the signal, such lnown signal being identified by an identification index and such time frame being identified by a time frame index, comprising:

  • Calculating for at least one time frame of the signal a pre-determined number of spectral magnitude values grouped in at least one frequency band of pre-determined width;

    Calculating for each frequency band a numeric value that is equal to a pre-determined function of one or more of the calculated spectral magntude values grouped within the frequency band;

    Storing the calculated numeric values in a computer database with a reference to their corresponding time frame index and their corresponding identification index.

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