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:
Feb. 04, 2014
Filed:
Dec. 30, 2011
Applicants:
Takuya Taniguchi, Tokyo, JP;
Shin Kato, Tokyo, JP;
Noritaka Kokido, Tokyo, JP;
Inventors:
Assignee:
Mitsubishi Electric Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04M 9/08 (2006.01); H04B 3/20 (2006.01);
U.S. Cl.
CPC ...
Abstract
An echo cancelergenerates an echo elimination signal by filtering through adaptive filtersandreference signals input from sound sources causing echoes. It includes a sound source number detecting unitfor detecting the number of the sound sources causing echoes from the reference signals, and a control unitfor making the number of taps of the adaptive filtersandvariable in accordance with the number of the sound sources detected by the sound source number detecting unit