Reverberation suppression device, reverberation suppression method, and computer-readable storage medium storing a reverberation suppression program

摘要

A reverberation suppression device includes an analyzer configured to analyze change over time in the power of an input signal obtained from a microphone in response to sound input, and thereby compute the decrease per unit time in the power of the input signal in a reverb segment following the end of a segment in which the sound is produced; and a suppression controller configured to control a suppression gain which indicates the rate at which the input signal is attenuated, on the basis of analysis results from the analyzer.

主权项

1. A reverberation suppression device comprising:
an analyzer configured to analyze a change in frames of an input audio signal over time in a spectra power of the input audio signal obtained from a microphone in response to a sound input, and thereby compute a decrease per unit time in the spectra power of the input audio signal in a reverb segment following an end of a segment in which sound is capable of being generated, the decrease per unit time is computed on basis of a peak position of a histogram computed by counting occurrences of changes in the spectra power of frames of the input audio signal; and a suppression controller configured to control, for an output audio signal on basis of the input audio signal, a suppression gain which indicates a rate at which the input audio signal is attenuated, on basis of the peak position of the histogram.