Speech enhancement device, speech enhancement method and speech enhancement computer program

摘要

A speech enhancement device which includes: a speech production section detection unit configured to detect a speech production section in which a speaker produces speech, from an input signal generated by a speech input unit; a timer unit configured to measure an elapsed time from a starting point of the speech production section; a gain determination unit configured to determine a gain, which represents a level of enhancement of the input signal, according to the elapsed time; and an enhancement unit configured to enhance the input signal or a spectrum signal of the input signal in the speech production section according to the gain, whereby the input signal is enhanced only at necessary portions thereof.