Time Delay Estimation Algoritms for Echo Cancellation
نویسندگان
چکیده
منابع مشابه
Delay estimation for transform domain acoustical echo cancellation
Acoustic echo cancellation can be used to remove talker feedback in hands-free systems. Fast convergence and good tracking capabilities cannot be achieved by classical transform domain adaptive filtering algorithms when the reference signal has a variable rank autocorrelation matrix. During the low rank phases of the speech signal, some of the transform-domain tap coefficients become irrelevant...
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A novel algorithm is introduced for estimating the echo path responses for stereophonic acoustic echo cancellation. When the Wiener solution for the echo path responses is non-unique, the echo paths are estimated in two stages. In a first stage, one of the non-unique Wiener solutions is estimated. Then in a second stage, a disturbance is introduced and the left and right misalignment vectors ca...
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Residual echo arises in hands–free telephony equipment due to insufficient echo canceler convergence, but can be suppressed using a postfilter. The residual echo power spectral density is the most crucial control parameter for both frequency–domain acoustic echo cancellation and combined residual echo and noise postfiltering. In this contribution we present and compare residual echo power spect...
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July–September 1998 Copyright 1998. Lucent Technologies Inc. All rights reserved. Introduction At present, most teleconferencing systems use a single full-duplex audio channel for voice communication. These systems usually employ an acoustic echo canceler (AEC) to remove undesired echoes that result from the coupling between a loudspeaker and a microphone. As these systems evolve to an ever mor...
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ژورنال
عنوان ژورنال: Advances in Electrical and Electronic Engineering
سال: 2011
ISSN: 1804-3119,1336-1376
DOI: 10.15598/aeee.v9i1.36