Patent · US Active

Acoustic echo canceling

US11081124B2 · kind B2 · utility

0Cited by

1References

18Claims

0Family size

Assignee

HARMAN BECKER AUTOMOTIVE SYSTEMS GMBH · DE

Inventors

Markus Christoph · Straubing, DE
Gerhard Pfaffinger · Regensburg, DE

Key dates

Filing date	Dec 8, 2017
Grant date	Aug 3, 2021
Priority date	—
Expiry date	Apr 6, 2038

Classification

Technology area (CPC G)Physics
CPC primaryG10L2021/02082
WIPO fieldComputer technology
WIPO sectorElectrical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.