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:
Apr. 15, 2008
Filed:
Nov. 05, 2004
William B. Page, Hudson, MA (US);
Yan Wang, Arlington, MA (US);
Timothy G. Wade, Litchfield, NH (US);
Mark Milot, Nashua, NH (US);
Ibrahim Yavuz, Arlington, MA (US);
David Cheng-song Qi, Westford, MA (US);
William B. Page, Hudson, MA (US);
Yan Wang, Arlington, MA (US);
Timothy G. Wade, Litchfield, NH (US);
Mark Milot, Nashua, NH (US);
Ibrahim Yavuz, Arlington, MA (US);
David Cheng-Song Qi, Westford, MA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
A testing and performance analysis methodology applies a series of test vector pairs to the input ports of an echo canceller under test. The test vector signal pair may represent a particular speech activity state transition, e.g., a Brady Model transition. A scoring compression function such as a sigmoid squashing function is used to evaluate quantized performance parameters. The sub-scores may be weighted and averaged to provide an overall performance score.