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:
Aug. 29, 2006
Filed:
Dec. 12, 2003
James B. Piket, Gilbert, AZ (US);
Kyle K. Iwai, Chandler, AZ (US);
Daniel S. Rokusek, Long Grove, IL (US);
James B. Piket, Gilbert, AZ (US);
Kyle K. Iwai, Chandler, AZ (US);
Daniel S. Rokusek, Long Grove, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A downlink activity and double talk probability detector and method for an echo canceler circuit () improves the stability of an echo canceler adaptive filter () and improves the attenuation of post-echo canceler uplink data (). The echo canceler circuit () includes a downlink activity and double talk probability data generator () and an echo canceler stage (). The downlink activity and double talk probability data generator () receives pre-echo canceler uplink data () and downlink data () and in response produces double talk probability data () and downlink activity data (). The echo canceler stage () receives the downlink data (), the pre-echo canceler uplink data (), the double talk probability data () and the downlink activity data (), and in response produces uplink data ().