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:
Dec. 09, 2003
Filed:
Oct. 07, 1999
Applicant:
Inventors:
Qu Jin, Kanata, CA;
Kon Max Wong, Dundas, CA;
Qiang Wu, Covallis, OR (US);
Philippe Wu, Nepean, CA;
Gordon J. Reesor, Russell, CA;
Assignee:
Zarlink Semiconductor Inc., , CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04M 9/08 ;
U.S. Cl.
CPC ...
H04M 9/08 ;
Abstract
A zero-delay structure to be used in sub-band echo cancellation systems. In telecommunications, a delay is usually introduced in sub-band decomposition and/or sub-band reconstruction. This invention will help remove this. This structure not only removes the delay but does not sacrifice the performance of the echo canceller. It is to be used in combination with any sub-band-based echo canceller or wavelet echo canceller.