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:
Oct. 25, 2011
Filed:
Apr. 20, 2006
Majid Fozunbal, Mountain View, CA (US);
Mat C. Hans, Hoffman Estates, IL (US);
Ronald W. Schater, Mountain View, CA (US);
Majid Fozunbal, Mountain View, CA (US);
Mat C. Hans, Hoffman Estates, IL (US);
Ronald W. Schater, Mountain View, CA (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
Various embodiments of the present invention are directed to methods and systems that reduce acoustic echoes in audio signals in accordance with changing conditions at first and second locations that are linked together in a communication system. In one embodiment of the present invention, a first digital signal encoding sounds produced at the first location is output from the first location, and a second digital signal encoding an acoustic echo and sounds produced at the second location is output from the second location. The method computes a control state that depends on the signals transmitted between the first and the second locations and computes an approximate acoustic echo based on the control state.