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:
May. 27, 2003
Filed:
Aug. 30, 1999
Applicant:
Inventors:
Wen-Rong Wu, Hsinchu, TW;
Shih-Chen Lin, Miao-Li, TW;
Po-Cheng Chen, San-Chong, TW;
Chun-Hung Kuo, Taiwan, TW;
Assignee:
Industrial Technology Research Institute, Hsinchu, TW;
Primary Examiner:
Int. Cl.
CPC ...
H04M 9/08 ; G06F 1/710 ;
U.S. Cl.
CPC ...
H04M 9/08 ; G06F 1/710 ;
Abstract
A communication system includes an echo canceller and double-talk detector. The echo canceller includes an adaptive finite impulse response filter that generates an adaptive filter weight vector. The double talk detector computes a squared norm of the filter weight vector and detects an increase of the squared norm in order to detect double-talk status. Upon detection of double-talk status, operation of the echo canceller is suspended.