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. 30, 1986
Filed:
Feb. 16, 1984
Applicant:
Inventors:
Seishi Kitayama, Tokyo, JP;
Tsutomu Washida, Saitama, JP;
Yuzo Fukushi, Tokyo, JP;
Yoshinori Ito, Tokyo, JP;
Assignees:
Kokusai Denshin Denwa Co., Ltd., , JP;
NEC Corporation, , JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
370 321 ; 364819 ; 379411 ;
Abstract
In order to prevent tap coefficient values from drifting toward excessively large values or divergence, an adaptive echo canceller is provided with a correction signal controller which (a) reduces the tap coefficient values upon the polarities of the tap coefficient signal and the tap coefficient correction signal coinciding and (b) increases the tap coefficient values upon the polarities differing.
Kitayama, Seishi. (1986). Adaptive echo canceller (U.S. Patent No. 4633046). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4633046
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile