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SIGNAL PROCESSING SYSTEM AND METHODS FOR RELIABLY DETECTING AUDIBLE ALARMS

  • US 20130077797A1
  • Filed: 09/17/2012
  • Published: 03/28/2013
  • Est. Priority Date: 07/29/2009
  • Status: Abandoned Application
First Claim
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1. A method for detecting audible alert signals, the method comprising:

  • generating a digital representation of a received audio signal;

    accessing a plurality of templates stored in a memory, each template corresponding to a respective audible alert signal timing pattern, said plurality of templates encompassing an acceptable range of timing pattern variations;

    generating, by signal processing circuitry, a plurality of matching scores, each of which represents a degree of match between the digital representation of the received audio signal and a respective template; and

    determining, based at least partly on the matching scores, whether an audible alert signal is present.

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