Available Technology

Measuring Voice Signal Enhancement

Method of Measuring Degree of Enhancement to Voice Signal

This technology measures the degree of enhancement made to a voice signal, reducing the need for human arbitrations and other various listening tests. Statistically, voice signals are “non-stationary,” changing over time. The more a signal becomes corrupted, however, the more stationary its distribution of values becomes. In this technology, the degree of reduction in the signal’s distribution indicates the degree of enhancement made to the signal. This invention quantifies the voice enhancement by comparing how stationary the distribution of values are between original and enhanced signals.

 

Abstract: 

Click to view PDFs of these patents on the US Patent and Trademark Office website: Patent 7,818,168

applications: 
  • Law enforcement
  • Audio forensics
  • Medical analysis
Patent Number: 
7,818,168
Patent Issue Date: 
October 19, 2010
Email: 
tech_transfer@nsa.gov
Lab Representatives
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