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:
Mar. 03, 2015
Filed:
Jul. 30, 2012
Applicant:
Gary Q. Jin, Kanata, CA;
Inventor:
Gary Q. Jin, Kanata, CA;
Assignee:
Microsemi Semiconductor Corp., Kanata, Ontario, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04M 9/08 (2006.01); H04R 3/00 (2006.01); H04B 3/23 (2006.01);
U.S. Cl.
CPC ...
H04R 3/002 (2013.01); H04B 3/23 (2013.01);
Abstract
A method of echo cancellation, particularly for use in high definition applications, splits an input signal and reference signal into M single-sided sub-band. The subbanded signals are downsampled at a downsampling rate N, where N≦M, adaptively filtered, and recombined to produce an output signal. The sub-bands are preferably oversampled such that N<M. The use of oversampling and single-sided sub-banding reduces complexity and avoids aliasing problems.