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This paper illustrates the use of acoustic modeling of three different structures, including syllables, fillers and keywords, for keyword spotting. Filler models and syllable models are applied to capture out-of-vocabulary words, while keyword models extract significant words from speech utterances. Grammatical
The authors present a view of HMM (hidden Markov model)-based word spotting systems as described by three main components: the HMM acoustic model; the overall HMM structure, including nonkeyword modeling; and the keyword scoring method. They investigate and present comparative results for various approaches to each of
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