Analysis and detection of double talk in telephone dialogs

Nishi, Hiroyuki; Kitai, M.

doi:10.21437/icslp.1994-420

Cited by 3 publications

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Robust double talk detection using the stochastic characteristics of power change for an adaptive noise canceller

Nishi

Etoh

Yoshida

IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004.

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The technique of detecting double talk which is an important subject for adaptive noise cancellers is described in this paper. In order to achieve the purpose, the power change of an error signal is studied. In this paper, experimental results are given to Support the theory that the error power change of double talk beginning frames is larger than that of echo changing frames. Using this fact, the method of finding the beginning of double talk frames is introduced distinguishing from echo path changing frames. The performance of the method is evauated by the accuracy of double talk detection and the echo path change detection.

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Robust double talk detection using the stochastic characteristics of power change for an adaptive noise canceller

Nishi

Etoh

Yoshida

IEEE International Symposium on Communications and Information Technology, 2004. ISCIT 2004.

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O-TEL-an experimental reverse directory telephone service with barge-in capability

Miksic

Kačič²,

Horvat³

Proceedings 1998 IEEE 4th Workshop Interactive Voice Technology for Telecommunications Applications. IVTTA '98 (Cat. No.98TH837

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Issues of practical implementation of a telephone dialog system are discussed with the reference to the experimental 0-TEL system (a telephone reverse directory service) developed at University of Maribor.The system offers a user to call the system, utters the telephone number in order to receive information on the subscriber (name and address).Critical implementation issues are: allowing a full-duplex telephone interaction (user barge-in); design of a dialog flowchart that enables fluent and fast dialog; robust fi:ature extraction with channel compensation; assuring a high recognition accuracy; and synchronizing the system prompt signal with the feature extraction part of a recognizer for the purposes of introducing echo cancellation as a part of feature extraction.Field trials have shown especially high rate of dialog completion and a good error recovery scheme. The capability of barge-in reduced the dialog completion time for up to 5a% (especially in error recovering phase).

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Discrimination Method of Double Talk and Echo Path Change Using the Stochastic Characteristics of Power Change for an Adaptive Noise Canceller

Nishi

Etoh

2005

Stochastic Systems Theory and its Applications (SSS)

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Analysis and detection of double talk in telephone dialogs

Cited by 3 publications

References 0 publications

Robust double talk detection using the stochastic characteristics of power change for an adaptive noise canceller

Robust double talk detection using the stochastic characteristics of power change for an adaptive noise canceller

O-TEL-an experimental reverse directory telephone service with barge-in capability

Discrimination Method of Double Talk and Echo Path Change Using the Stochastic Characteristics of Power Change for an Adaptive Noise Canceller

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