A real-time isolated word recognizer for telephone input

We describe a new real-time isolated word recognizer with improved user interface. The recognizer is designed for an Extension Number Guidance System which looks up and announces an extension number by telephone dialogue with users. To deal with telephone quality speech input which include noise and...

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Bibliographic Details
Published inJournal of the Acoustical Society of Japan (E) Vol. 15; no. 2; pp. 87 - 96
Main Authors Yato, Fumihiro, Kuroiwa, Shingo, Takeda, Kazuya, Yamamoto, Seiichi, Owa, Kunihiko, Shozakai, Makoto
Format Journal Article
LanguageEnglish
Published Tokyo Acoustical Society of Japan 1994
Subjects
Applied sciences
Echo canceler
Exact sciences and technology
Information, signal and communications theory
Isolated word recognizer
Signal processing
Speech processing
Speech recognition
Telecommunications and information theory
Telephone speech
Word detection algorithm
Suppressor
Telephone
Real time system
Signal detection
Speech recognition
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Summary:We describe a new real-time isolated word recognizer with improved user interface. The recognizer is designed for an Extension Number Guidance System which looks up and announces an extension number by telephone dialogue with users. To deal with telephone quality speech input which include noise and distortion during transmission over the telephone network, we developed feature extraction and a word detection algorithm. These techniques use wide band-pass filter outputs which are generally employed to decide whether speech is voiced or unvoiced. To achieve a friendly interface, the system can accept user input at any time by using an echo canceler and the new word detection algorithm. Finally, the recognizer is evaluated using a large telephone voice database consisting of more than 500 speakers.
ISSN:0388-2861
2185-3509
DOI:10.1250/ast.15.87