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:
Oct. 11, 2005
Filed:
Jan. 16, 2004
Applicant:
Jacob H. Gunther, North Logan, UT (US);
Inventor:
Jacob H. Gunther, North Logan, UT (US);
Assignee:
Utah State University, Logan, UT (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H04M001/00 ;
U.S. Cl.
CPC ...
Abstract
An echo canceler includes an recursive least squares lattice to whiten a far-end signal s(t) and provide whitened time delays. The echo canceler further decorrelates a microphone signal based on the whitened time delays to reduce echoes of the far-end signal s(t) that are contained in the microphone signal x(t). The echo canceler does not use a double-talk detector and avoids all problems inherent with their use. Thus, speaker phones, and other communication devices, can continuously operate in full-duplex mode of operation thereby providing natural conversational hands-free communication.