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. 25, 2008
Filed:
Nov. 10, 2003
Applicant:
Yong-woon Kim, Suwon-shi, KR;
Inventor:
Yong-Woon Kim, Suwon-shi, KR;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04K 1/10 (2006.01); H04L 27/28 (2006.01);
U.S. Cl.
CPC ...
Abstract
An echo cancellation circuit includes delay units at its input unit and output unit in order to adjust the delay caused by a FIFO. The delay times of the delay units are trained using a training signal, such the REVERB signal, that is a system initializing signal. In addition, an upstream pilot tone is used to tune the delay time. The performance of the echo cancellation circuit is optimized according to the device and the method described.