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. 16, 2006
Filed:
Dec. 12, 2003
James B. Piket, Gilbert, AZ (US);
Keith L. Owens, Crystal Lake, IL (US);
Christopher W. Springfield, Chandler, AZ (US);
James B. Piket, Gilbert, AZ (US);
Keith L. Owens, Crystal Lake, IL (US);
Christopher W. Springfield, Chandler, AZ (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A double talk activity detector () and method for an echo canceler circuit () improves the probability of detecting a double talk condition based on at least pre-echo canceler uplink data (). The echo canceler circuit () includes a double talk activity probability data generator () and an echo canceler stage (). The double talk activity probability data generator () receives pre-echo canceler uplink data () and in response produces double talk activity probability data (). The echo canceler stage () is coupled to the double talk activity probability data generator () and receives downlink data (), pre-echo canceler uplink data () and the double talk activity probability data () and in response produces attenuated uplink data ().