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:
Jun. 01, 2010
Filed:
Jun. 15, 2005
Applicants:
Mohamed El-hennawey, Kanata, CA;
Rafik Goubran, Ottawa, CA;
Ayman M. Radwan, Kingston, CA;
Lijing Ding, Nepean, CA;
Inventors:
Mohamed El-Hennawey, Kanata, CA;
Rafik Goubran, Ottawa, CA;
Ayman M. Radwan, Kingston, CA;
Lijing Ding, Nepean, CA;
Assignee:
Nortel Networks Limited, St. Laurent, Quebec, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 31/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
An apparatus (), method, and computer program to assess VoIP speech quality () using access to degraded signals. Different types of impairment () have different effect on speech quality. Preferred embodiments address two distinct types of impairment that are unique to VoIP: packet loss () and speech clipping in time ().