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. 03, 2021
Filed:
Dec. 08, 2017
Harman Becker Automotive Systems Gmbh, Karlsbad, DE;
Markus Christoph, Straubing, DE;
Gerhard Pfaffinger, Regensburg, DE;
HARMAN BECKER AUTOMOTIVE SYSTEMS GMBH, Karlsbad, DE;
Abstract
Systems and methods are provided for acoustic echo canceling. In one embodiment, a system for canceling acoustic echoes comprises one or more microphones configured to pick up sound generated by a sound source and transferred from the sound source to the one or more microphones via one or more unknown transfer paths having one or more unknown transfer functions, and to provide one or more electrical microphone signals therefrom, one or more adaptive filters for approximating the one or more unknown transfer functions with one or more estimated transfer functions and filtering one or more electrical signals representative of the sound generated by the sound source with the one or more estimated transfer functions to provide one or more estimated signals therefrom, and a microphone calibration block configured to individually attenuate or amplify the one or more electrical microphone signals dependent on the one or more estimated transfer functions.