VOICE ACTIVITY DETECTOR, VOICE ACTIVITY DETECTION PROGRAM, AND PARAMETER ADJUSTING METHOD

摘要

Judgment result deriving means 74 makes a judgment between active voice and non-active voice every unit time for a time series of voice data in which the number of active voice segments and the number of non-active voice segments are already known as a number of the labeled active voice segment and a number of the labeled non-active voice segment and shapes active voice segments and non-active voice segments as the result of the judgment by comparing the length of each segment during which the voice data is consecutively judged to correspond to active voice by the judgment or the length of each segment during which the voice data is consecutively judged to correspond to non-active voice by the judgment with a duration threshold. Segments number calculating means 75 calculates the number of active voice segments and the number of non-active voice segments. Duration threshold updating means 76 updates the duration threshold so that the difference between the calculated number of active voice segments and the number of the labeled active voice segments decreases or the difference between the calculated number of non-active voice segments and the number of the labeled non-active voice segments decreases.