AUDIBLE DOCUMENT IDENTIFICATION FOR VISUALLY IMPAIRED PEOPLE
First Claim
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.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed is a document or article carrying information for the audible authentication of said document or article, wherein the information is present in or on said document or article in the form of a frequency-versus-time spectral density function (spectrogram), the spectrogram being embodied using document security means. Disclosed are further a method for producing said document or article; a reader device for displaying audible authentication information from said document or article, a method for authenticating said document or article and the use of a spectrogram for document authentication purposes.
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Citations
18 Claims
- 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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18. Use of a spectrogram, being a frequency-versus-time function, which is embodied in or on a document or article for the identification or authentication of said document or article.
Specification