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. 03, 2004
Filed:
Aug. 24, 1999
Chiang Yeh, Arcadia, CA (US);
Wei-Jei Song, Aliso Viejo, CA (US);
Nortel Networks Limited, St. Laurent, CA;
Abstract
A method, apparatus and system employing such for adapting the Beta factor in a echo cancellation adaptive filter by using echo loss return enhancement (ERLE) as a metric to determine the setting of the Beta factor. In addition, a method and apparatus for determining the optimum number of filter taps used in an adaptive filter by dividing a filter array into blocks of taps, finding for each tap the sum of squares of the coefficients therein and then comparing the sum to an average block energy. Based on this comparison, a block is deemed to either contribute significantly to the operation of the filter or not. Starting with the tail end block of the array, the optimum filter order is found by determining when the first contributing block is found.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile