Adaptive Echo Cancelation for Voice Signals

Sondhi, M. M.

doi:10.1007/978-3-540-49127-9_45

Cited by 6 publications

(2 citation statements)

References 36 publications

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“…Acoustic echo control is a substantial part of any handsfree teleconferencing system [1]- [4]. These systems have gained popularity in recent years.…”

Section: Introductionmentioning

confidence: 99%

“…Such periods are referred to as double-talk and can be found by double-talk detectors and voice activity detectors (VADs). The adaptive filter must be adapted during periods when there is no double-talk, with techniques such as least-meansquares (LMS), normalized LMS (NLMS), proportionate NLMS (PNLMS), and others [1]. While advanced deeplearning-based multimodal detectors are available [7], some AEC applications do not contain additional modalities or lack the required data for network training.…”

Section: Introductionmentioning

confidence: 99%

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Multichannel Acoustic Echo Cancellation With Beamforming in Dynamic Environments

Konforti,

Cohen,

Berdugo

2023

IEEE Open J. Signal Process.

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Acoustic echo cancellers are integrated into various speech communication devices, such as hands-free conferencing systems and speakerphones. Microphone arrays can be employed to enhance the performance of such systems, though they assume a static environment when transitioning to double-talk, and rely on double-talk detection. This work introduces a multichannel echo canceller implemented by a microphone array beamformer that can adapt to a changing environment where the locations of both the farend and near-end sources change during double-talk, with no double-talk detector. This is done by utilizing multiple recent frames in the short-time Fourier transform (STFT) domain. We show how can the acoustic paths be accurately estimated given the recent time frames of the far-end and microphone signals. Also, our beamformer aims to reduce background noise. Simulations are conducted in a reverberant room with nonlinear loudspeaker distortion and realistic low signal-to-echo ratio (SER) resembling a speakerphone. The experiments demonstrate the advantages of the proposed approach compared to normalized leastmean-squares (NLMS) based approaches.INDEX TERMS Acoustic echo cancellation, array signal processing, beamforming, adaptive filtering.

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“…Acoustic echo control is a substantial part of any handsfree teleconferencing system [1]- [4]. These systems have gained popularity in recent years.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%