A new doubletalk detector with fuzzy decision thresholding

M. Waseem; M. Omer; A. I. Bhatti; S. I. Shah

doi:10.1109/ISCON.2002.1215950

A new doubletalk detector with fuzzy decision thresholding

M. Waseem
, M. Omer
, A. I. Bhatti
, S. I. Shah

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

A doubletalk detector (DTD) is used with an echo canceller to sense when far end speech is corrupted by near end speech. This detection is used to stop the divergence of an adaptive echo canceller. In the steady state, this decision is crucial because it controls the operation of the nonlinear processor (NLP) used for the suppression of residual echo. Various algorithms have been proposed in the literature, all of them having a crisp decision threshold. We review existing algorithms and explore their performance and suitability for real time fixed-point implementation. A new variance based normalized estimator for doubletalk detection is proposed. Finally, a fuzzy system is designed to select the threshold for the DTD during operation. This new algorithm takes into account the near end to far end power ratio, is simple to implement and shows an enhancement in performance. Furthermore, precision requirements are not very stringent for the fuzzy DTD, thus making it suitable for fixed-point implementation.

Original language	English
Title of host publication	Proceedings - IEEE Students Conference, ISCON 2002 - Emerging Technologies
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	117-121
Number of pages	5
ISBN (Electronic)	078037505X, 9780780375055
DOIs	https://doi.org/10.1109/ISCON.2002.1215950
State	Published - 2002
Externally published	Yes
Event	IEEE Students Conference, ISCON 2002 - Lahore, Pakistan Duration: 16 Aug 2002 → 17 Aug 2002

Publication series

Name	Proceedings - IEEE Students Conference, ISCON 2002 - Emerging Technologies

Conference

Conference	IEEE Students Conference, ISCON 2002
Country/Territory	Pakistan
City	Lahore
Period	16/08/02 → 17/08/02

Bibliographical note

Publisher Copyright:
© 2002 IEEE.

Keywords

Adaptive Filter
Doubletalk Detection
Line Echo Cancellation

ASJC Scopus subject areas

Electrical and Electronic Engineering
Computer Networks and Communications
Computer Science Applications

Access to Document

10.1109/ISCON.2002.1215950

Cite this

Waseem, M., Omer, M., Bhatti, A. I., & Shah, S. I. (2002). A new doubletalk detector with fuzzy decision thresholding. In Proceedings - IEEE Students Conference, ISCON 2002 - Emerging Technologies (pp. 117-121). Article 1215950 (Proceedings - IEEE Students Conference, ISCON 2002 - Emerging Technologies). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ISCON.2002.1215950

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title = "A new doubletalk detector with fuzzy decision thresholding",

abstract = "A doubletalk detector (DTD) is used with an echo canceller to sense when far end speech is corrupted by near end speech. This detection is used to stop the divergence of an adaptive echo canceller. In the steady state, this decision is crucial because it controls the operation of the nonlinear processor (NLP) used for the suppression of residual echo. Various algorithms have been proposed in the literature, all of them having a crisp decision threshold. We review existing algorithms and explore their performance and suitability for real time fixed-point implementation. A new variance based normalized estimator for doubletalk detection is proposed. Finally, a fuzzy system is designed to select the threshold for the DTD during operation. This new algorithm takes into account the near end to far end power ratio, is simple to implement and shows an enhancement in performance. Furthermore, precision requirements are not very stringent for the fuzzy DTD, thus making it suitable for fixed-point implementation.",

keywords = "Adaptive Filter, Doubletalk Detection, Line Echo Cancellation",

author = "M. Waseem and M. Omer and Bhatti, \{A. I.\} and Shah, \{S. I.\}",

note = "Publisher Copyright: {\textcopyright} 2002 IEEE.; IEEE Students Conference, ISCON 2002 ; Conference date: 16-08-2002 Through 17-08-2002",

year = "2002",

doi = "10.1109/ISCON.2002.1215950",

language = "English",

series = "Proceedings - IEEE Students Conference, ISCON 2002 - Emerging Technologies",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

pages = "117--121",

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address = "United States",

}

Waseem, M, Omer, M, Bhatti, AI & Shah, SI 2002, A new doubletalk detector with fuzzy decision thresholding. in Proceedings - IEEE Students Conference, ISCON 2002 - Emerging Technologies., 1215950, Proceedings - IEEE Students Conference, ISCON 2002 - Emerging Technologies, Institute of Electrical and Electronics Engineers Inc., pp. 117-121, IEEE Students Conference, ISCON 2002, Lahore, Pakistan, 16/08/02. https://doi.org/10.1109/ISCON.2002.1215950

A new doubletalk detector with fuzzy decision thresholding. / Waseem, M.; Omer, M.; Bhatti, A. I. et al.
Proceedings - IEEE Students Conference, ISCON 2002 - Emerging Technologies. Institute of Electrical and Electronics Engineers Inc., 2002. p. 117-121 1215950 (Proceedings - IEEE Students Conference, ISCON 2002 - Emerging Technologies).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - A new doubletalk detector with fuzzy decision thresholding

AU - Waseem, M.

AU - Omer, M.

AU - Bhatti, A. I.

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N2 - A doubletalk detector (DTD) is used with an echo canceller to sense when far end speech is corrupted by near end speech. This detection is used to stop the divergence of an adaptive echo canceller. In the steady state, this decision is crucial because it controls the operation of the nonlinear processor (NLP) used for the suppression of residual echo. Various algorithms have been proposed in the literature, all of them having a crisp decision threshold. We review existing algorithms and explore their performance and suitability for real time fixed-point implementation. A new variance based normalized estimator for doubletalk detection is proposed. Finally, a fuzzy system is designed to select the threshold for the DTD during operation. This new algorithm takes into account the near end to far end power ratio, is simple to implement and shows an enhancement in performance. Furthermore, precision requirements are not very stringent for the fuzzy DTD, thus making it suitable for fixed-point implementation.

AB - A doubletalk detector (DTD) is used with an echo canceller to sense when far end speech is corrupted by near end speech. This detection is used to stop the divergence of an adaptive echo canceller. In the steady state, this decision is crucial because it controls the operation of the nonlinear processor (NLP) used for the suppression of residual echo. Various algorithms have been proposed in the literature, all of them having a crisp decision threshold. We review existing algorithms and explore their performance and suitability for real time fixed-point implementation. A new variance based normalized estimator for doubletalk detection is proposed. Finally, a fuzzy system is designed to select the threshold for the DTD during operation. This new algorithm takes into account the near end to far end power ratio, is simple to implement and shows an enhancement in performance. Furthermore, precision requirements are not very stringent for the fuzzy DTD, thus making it suitable for fixed-point implementation.

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M3 - Conference contribution

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T3 - Proceedings - IEEE Students Conference, ISCON 2002 - Emerging Technologies

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BT - Proceedings - IEEE Students Conference, ISCON 2002 - Emerging Technologies

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - IEEE Students Conference, ISCON 2002

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ER -

A new doubletalk detector with fuzzy decision thresholding

Abstract

Publication series

Conference

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

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Cite this