Acoustic Echo Canacellation Using Multirate Techniques

Hector PEREZ; Fumio AMANO

Acoustic Echo Canacellation Using Multirate Techniques

Hector PEREZ, Fumio AMANO

Full Text Views

0

Cite this

Summary :

In a recent paper, we proposed a subband echo canceler (SBEC) structure that has a shorter transmission delay than conventional SBEC structures and is free of distortion due to frequency gaps or aliased components. The double-talk detector we propose in this paper, takes advantages of the subband realization form and is based on adaptive echo canceler operation even during periods of double-talk. The computationally simple structure quickly and accurately detects periods of double-talk and track variations in echo path characteristics. The extended complex LMS algorithm we also propose avoids distortion during periods of double-talk. Computer simulations using white noise and actual speech signals confirm fast tracking speed, accurate double-talk detection, and other desirable features of the proposed scheme. We evaluated the proposed hardware structure using a WE DSP32C development system. Assuming a 16 kHz sampling rate, a decimation factor of 32, and a 4000-tap echo path, we found 4 DSP chips to be sufficient to implement the proposed scheme. Results of our experiments show almost the same convergence performance as that obtained in computer simulation.

Publication: IEICE TRANSACTIONS on Fundamentals Vol.E74-A No.11 pp.3559-3568

Publication Date: 1991/11/25

Publicized

Online ISSN

DOI

Type of Manuscript: Special Section PAPER (Special Issue on HAKONE Digital Signal Processing Symposium)

Category

Authors

Hector PEREZ
Fumio AMANO

Keyword

Cite this

Copy

Hector PEREZ, Fumio AMANO, "Acoustic Echo Canacellation Using Multirate Techniques" in IEICE TRANSACTIONS on Fundamentals, vol. E74-A, no. 11, pp. 3559-3568, November 1991, doi: .
Abstract: In a recent paper, we proposed a subband echo canceler (SBEC) structure that has a shorter transmission delay than conventional SBEC structures and is free of distortion due to frequency gaps or aliased components. The double-talk detector we propose in this paper, takes advantages of the subband realization form and is based on adaptive echo canceler operation even during periods of double-talk. The computationally simple structure quickly and accurately detects periods of double-talk and track variations in echo path characteristics. The extended complex LMS algorithm we also propose avoids distortion during periods of double-talk. Computer simulations using white noise and actual speech signals confirm fast tracking speed, accurate double-talk detection, and other desirable features of the proposed scheme. We evaluated the proposed hardware structure using a WE DSP32C development system. Assuming a 16 kHz sampling rate, a decimation factor of 32, and a 4000-tap echo path, we found 4 DSP chips to be sufficient to implement the proposed scheme. Results of our experiments show almost the same convergence performance as that obtained in computer simulation.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/e74-a_11_3559/_p

Copy

@ARTICLE{e74-a_11_3559,
author={Hector PEREZ, Fumio AMANO, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Acoustic Echo Canacellation Using Multirate Techniques},
year={1991},
volume={E74-A},
number={11},
pages={3559-3568},
abstract={In a recent paper, we proposed a subband echo canceler (SBEC) structure that has a shorter transmission delay than conventional SBEC structures and is free of distortion due to frequency gaps or aliased components. The double-talk detector we propose in this paper, takes advantages of the subband realization form and is based on adaptive echo canceler operation even during periods of double-talk. The computationally simple structure quickly and accurately detects periods of double-talk and track variations in echo path characteristics. The extended complex LMS algorithm we also propose avoids distortion during periods of double-talk. Computer simulations using white noise and actual speech signals confirm fast tracking speed, accurate double-talk detection, and other desirable features of the proposed scheme. We evaluated the proposed hardware structure using a WE DSP32C development system. Assuming a 16 kHz sampling rate, a decimation factor of 32, and a 4000-tap echo path, we found 4 DSP chips to be sufficient to implement the proposed scheme. Results of our experiments show almost the same convergence performance as that obtained in computer simulation.},
keywords={},
doi={},
ISSN={},
month={November},}

Copy

TY - JOUR
TI - Acoustic Echo Canacellation Using Multirate Techniques
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 3559
EP - 3568
AU - Hector PEREZ
AU - Fumio AMANO
PY - 1991
DO -
JO - IEICE TRANSACTIONS on Fundamentals
SN -
VL - E74-A
IS - 11
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - November 1991
AB - In a recent paper, we proposed a subband echo canceler (SBEC) structure that has a shorter transmission delay than conventional SBEC structures and is free of distortion due to frequency gaps or aliased components. The double-talk detector we propose in this paper, takes advantages of the subband realization form and is based on adaptive echo canceler operation even during periods of double-talk. The computationally simple structure quickly and accurately detects periods of double-talk and track variations in echo path characteristics. The extended complex LMS algorithm we also propose avoids distortion during periods of double-talk. Computer simulations using white noise and actual speech signals confirm fast tracking speed, accurate double-talk detection, and other desirable features of the proposed scheme. We evaluated the proposed hardware structure using a WE DSP32C development system. Assuming a 16 kHz sampling rate, a decimation factor of 32, and a 4000-tap echo path, we found 4 DSP chips to be sufficient to implement the proposed scheme. Results of our experiments show almost the same convergence performance as that obtained in computer simulation.
ER -