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AUDIBLE DOCUMENT IDENTIFICATION FOR VISUALLY IMPAIRED PEOPLE

  • US 20150036872A1
  • Filed: 02/07/2013
  • Published: 02/05/2015
  • Est. Priority Date: 02/23/2012
  • Status: Abandoned Application
First Claim
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1. Document or article carrying audible information for the audible authentication of said document or article, characterized in that the audible information is present in or on the document or article in the form of a spectrogram, the spectrogram being embodied using document security means, said spectrogram being a frequency-versus time function.

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