The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 05, 2008
Filed:
Jan. 20, 2004
John C. Morfitt, Iii, Oakton, VA (US);
Irina C. Cotanis, Warrenton, VA (US);
John C. Morfitt, III, Oakton, VA (US);
Irina C. Cotanis, Warrenton, VA (US);
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Abstract
A processing unit and method are described herein that are capable of estimating a quality of a speech signal transmitted through a wireless network. The processing unit uses a logistic function to map a score output from an objective voice quality method (PESQ algorithm) into a mean of opinion (MOS) score which is an estimation of the quality of the speech signal that was transmitted through the wireless network. The logistic function has the form: y=1+4/(1+exp(−1.7244*x+5.0187)) where x is the score from the PESQ algoritm which is in the range of −0.5 to 4.5 and y is the mapped MOS score which is in the range of 1 to 5 wherein if y=5 then the quality of the speech signal is considered excellent and if y=1 then the quality of the speech signal is considered bad.