A New Echo Cancellation Algorithm without Double-Talk Detection Based on Correlation Function

Li Jun Sun; Shou Yong Zhang; Wei Sheng Wang; Xiao Ning Zhang

doi:10.4028/www.scientific.net/AMR.225-226.996

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 225-226A New Echo Cancellation Algorithm without...

A New Echo Cancellation Algorithm without Double-Talk Detection Based on Correlation Function

Abstract:

In an adaptive echo canceller, the detection algorithm able to distinguish echo path change (EPC) from double-talk (DT) is vital to ensure that adaptive filter tap coefficients are updated in case of EPC and frozen during the DT period. The paper presents a new echo cancel algorithm, which can protect the adaptive filter performance during double-talk in acoustic echo cancellation of teleconference without setting a detector. A judgment value can be directly used in the iteration formula to control the iteration speed of the filter, which composed of the correlation of the far-end signal and near-end received signal, the pre-correlation of the error signal. The computer simulation results verify that the mentioned algorithm has the good double talk protection performance, and it is very useful and efficient in distinguishing EPC from DT but with less computational complexity contrast to the congener algorithm.

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Periodical:

Advanced Materials Research (Volumes 225-226)

Pages:

996-999

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.225-226.996

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Online since:

April 2011

Authors:

Li Jun Sun, Shou Yong Zhang, Wei Sheng Wang, Xiao Ning Zhang

Keywords:

Adaptive Echo Canceller, Double-Talk (DT), Echo Path Change (EPC)

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