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:
Apr. 14, 2015
Filed:
May. 27, 2010
Mahdi Triki, Eindhoven, NL;
Cornelis Pieter Janse, Eindhoven, NL;
Mahdi Triki, Eindhoven, NL;
Cornelis Pieter Janse, Eindhoven, NL;
Koninklijke Philips N.V., Eindhoven, NL;
Abstract
A multi-channel acoustic echo canceller arrangement comprises a microphone () providing a microphone signal having contributions from at least two audio sources () to be cancelled. An echo canceling circuit () performs echo cancellation of the two audio sources () based on channel estimates for channels from each of the audio sources () to the microphone (). An estimation circuit () generates each of the channel estimates as a combination of a previous channel estimate and a channel estimate update where the combination includes applying a relative weight to the channel estimate update relative to the previous channel estimate. A weight processorvaries the relative weight in response to a time value. The arrangement may provide improved echo-cancellation for scenarios wherein the rendering of sound from the audio sources () is time varying, such as when time varying decorrelation filters are used.