Subband echo cancellation in automatic speech dialog systems

Miksic, Andrej; Horvat, Bogomir

doi:10.21437/eurospeech.1997-401

Cited by 4 publications

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Towards best practice in the development and evaluation of speech recognition components of a spoken language dialog system

2000

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This article provides a global overview of the main aspects of current practice in the design, implementation and evaluation of speech recognition components for Spoken Language Dialog Systems (SLDSs), and presents the results of the DISC European project related to speech recognition. DISC and its successor DISC-2 are efforts towards the definition of best practice guidelines for SLDS development and evaluation. SLDSs aim at using natural spoken input for performing an information processing task such as automated standards, call routing or travel planning and reservations. The main functionality of an SLDS are speech recognition, natural language understanding, dialog management, database access and interpretation, response generation and speech synthesis. Speech recognition, which transforms the acoustic signal into a string of words, is a key technology in any SLDS. † This paper is based on research carried out within the ESPRIT 4th Framework LTR Concerted action projects 24823 and 29597 DISC-Spoken Language Dialog Systems and Components; Best Practice in Development and Evaluation. 1 DISC addresses the following six aspects of SLDSs: speech recognition, speech generation, language understanding and generation, dialogue management, human factors and systems integration. See Section 2.

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Towards best practice in the development and evaluation of speech recognition components of a spoken language dialog system

2000

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Žgank

Rojc

2003

International Journal of Speech Technology

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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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Subband echo cancellation in automatic speech dialog systems

Cited by 4 publications

References 0 publications

Towards best practice in the development and evaluation of speech recognition components of a spoken language dialog system

Towards best practice in the development and evaluation of speech recognition components of a spoken language dialog system

Untitled

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

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