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. 08, 2015
Filed:
Apr. 25, 2012
Applicants:
Takashi Sudo, Tokyo, JP;
Atsuyoshi Yano, Tokyo, JP;
Tomoharu Awano, Tokyo, JP;
Inventors:
Assignee:
Mitsubishi Electric Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B 3/20 (2006.01); H04R 3/00 (2006.01); H04M 9/08 (2006.01);
U.S. Cl.
CPC ...
H04R 3/002 (2013.01); H04M 9/082 (2013.01);
Abstract
An echo cancelling device splits a low-band signal through LPFs having characteristics which do not cause aliasing during downsampling of downsamplers, and splits a high-band signal through HPFs having characteristics which do not cause aliasing during downsampling of downsamplers. The echo canceling device generates a mid-band signal by subtracting the low-band signal and the high-band signal from a pre-split signal by adder-subtractors, and cancels an echo on a band-by-band basis.