A Stereophonic Acoustic Echo Cancellation Algorithm Based on Sub-band Extended LMS Algorithm and Dual-Filter Structure

Acoustic Echo Cancellers are widely used in speech communication applications to cancel echoes that result from the coupling between loudspeaker and microphone. Nowadays many teleconferencing systems use two-channel audio to enhance sound realism. However, stereophonic acoustic echo cancellation (SA...

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Bibliographic Details
Published in2022 IEEE 8th International Conference on Computer and Communications (ICCC) pp. 1583 - 1588
Main Authors Xiao, Zeping, Zhou, Yi, Ma, Yongbao, Liu, Hongqing
Format Conference Proceeding
LanguageEnglish
Published IEEE 09.12.2022
Subjects
Acoustics
Couplings
dual-filter
Echo cancellers
ELMS algorithm
Frequency-domain analysis
Loudspeakers
Oral communication
stereo acoustic echo cancellation
sub-band
Teleconferencing
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DOI10.1109/ICCC56324.2022.10065903

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Summary:Acoustic Echo Cancellers are widely used in speech communication applications to cancel echoes that result from the coupling between loudspeaker and microphone. Nowadays many teleconferencing systems use two-channel audio to enhance sound realism. However, stereophonic acoustic echo cancellation (SAEC) is more difficult than its single-channel counterpart because of the high correlation between the two excitation signals. This paper proposes a SAEC algorithm with excellent convergence performance and robust double talk detection (DTD) performance, which uses an Extended LMS (ELMS) algorithm in sub-bands. By utilizing the dual-filter structure with a robust transfer logic, the proposed algorithm becomes more stable in a double-talk situation. The experimental results prove that the proposed SAEC algorithm outperforms the sub-band ELMS algorithm with pseudo-coherence and ELMS algorithm with pseudo-coherence based on block processing in frequency-domain (two-channel FLMS).
DOI:10.1109/ICCC56324.2022.10065903