SPEECH DETECTION DEVICE, SPEECH DETECTION METHOD, AND MEDIUM
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United States of America Patent
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Issued Date -
Sep 15, 2016
app pub date -
May 8, 2014
filing date -
May 8, 2014
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Abstract
A speech detection device according to the present invention acquires an acoustic signal, calculates a sound level for first frames in the acoustic signal, determines the first frame having the sound level greater than or equal to a first threshold value as a first target frame, calculates a feature value representing a spectrum shape for second frames in the acoustic signal, calculates a ratio of a likelihood of a voice model to a likelihood of a non-voice model for the second frames with the feature value as an input, determines the second frame having the likelihood ratio greater than or equal to a second threshold value as a second target frame, and determines a section included in both a first target section corresponding to the first target frame and a second target section corresponding to the second target frame as a target voice section including the target voice.
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