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INFERENCE OF TIMESTAMP, LOCATION, AND SIGNATURE INFORMATION USING STATISTICAL SIGNAL PROCESSING OF POWERLINE DATA

  • US 20150052073A1
  • Filed: 08/14/2014
  • Published: 02/19/2015
  • Est. Priority Date: 08/15/2013
  • Status: Active Grant
First Claim
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1. A system that determines at least one of a time and a location associated with a recording, said system comprising:

  • an electric network frequency (ENF) forensic database storing powerline data collected from at least one electrical power grid, the powerline data comprising a plurality of data points representing changes within electric fields associated with at least one electrical power grid over time and including at least one of information indicative of times at which specific data points were obtained and information identifying a location in the at least one electrical power grid from which the specific data points were obtained;

    an ENF extraction processing module extracting ENF content coupled into the recording; and

    a comparison processing module comparing the extracted ENF content with powerline data retrieved from the ENF forensic database and outputting information including one or more of a time during which the recording was made and a location where the recording was made based on the comparison with the powerline data.

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