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:
Jun. 26, 2012
Filed:
Apr. 28, 2009
Majid Fozunbal, Mountain View, CA (US);
Ton Kalker, Carmel, CA (US);
Majid Fozunbal, Mountain View, CA (US);
Ton Kalker, Carmel, CA (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
Proper estimation of impulse responses is an important and challenging aspect of multichannel echo control. Various embodiments of the present invention are directed to real-time, adaptive acoustic echo cancellation methods in multichannel audio-communication systems. In particular, embodiments of the present invention use a collection of a room's past impulse responses to determine an optimal lower dimensional impulse response space as the underlying search subspace for approximate impulse responses. As a result, embodiments of the present invention mitigate inherent instability of multichannel audio-communication systems and provide stable and accurate echo removal without distorting audio signals.