Title:
METHOD FOR CONTROLLING THE ADAPTIVE BEHAVIOR OF ACOUSTIC ECHO COMPENSATION
Document Type and Number:
WIPO Patent Application WO2007062634
Kind Code:
B1
Abstract:
The aim of the invention, which relates to a method for controlling the adaptive behavior of acoustic echo compensation, is to create a method for controlling the adaptive behavior of acoustic echo compensation that is characterized by increased robustness relative to interfering influences while maintaining the same high adaptation speed as previously known FBLMS processes, said method making it possible to quickly and robustly estimate interfering influences and evaluate the adaptation quality. Said aim is achieved by the fact that the echo is compensated by controlling an adaptation step width of an echo compensation filter independently of the frequency and time, the controlling process being adjusted to the environmental situation while taking into account the robust estimation of interfering influences such as background noise or crosstalk signals without having to detect crosstalk. Furthermore, the adaptation step width of the echo compensation filter is determined using a distance in the transmission function between a space impulse response and an impulse response of the echo compensation filter. A power spectrum of a residual echo signal which is determined when the adaptation step width is calculated is additionally used for improving residual echo suppression.
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Inventors:
GRUBER CHRISTIAN (DE)
HIRSCHFELD DIANE (DE)
HIRSCHFELD DIANE (DE)
Application Number:
PCT/DE2006/002119
Publication Date:
August 23, 2007
Filing Date:
November 30, 2006
Export Citation:
Assignee:
VOICE INTER CONNECT GMBH (DE)
GRUBER CHRISTIAN (DE)
HIRSCHFELD DIANE (DE)
GRUBER CHRISTIAN (DE)
HIRSCHFELD DIANE (DE)
International Classes:
H04M9/08
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