SPEECH DETECTION DEVICE, SPEECH DETECTION METHOD, AND PROGRAM

摘要

A speech detection device (10) having: an acoustic signal acquisition unit (21) that acquires an acoustic signal; a speech segment detection unit (20) that uses the ratio between the likelihood of a speech model with respect to the likelihood of a non-speech model (calculated using as an input a feature amount representing the spectral shape) to determine candidate target speech segments, which are segments that include target speech; and a rejection unit (27) that uses a time difference and/or the entropy of the posterior probability for each of multiple phonemes (calculated using as an input the aforementioned feature amount) to identify those of the candidate target speech segments to be changed to segments that do not include target speech.