Noise suppressing device, noise suppressing method, and a non-transitory computer-readable recording medium storing noise suppressing program

摘要

There is provided a noise suppressing device for suppress a noise component included in an input signal. The noise suppressing device comprises: a noise estimating unit configured to estimate a noise spectrum based on an input spectrum obtained by performing a frequency analysis on the input signal; a speech-likelihood calculating unit configured to calculate speech-likelihood based on the input spectrum and the noise spectrum; a suppression-gain calculating unit configured to calculate first suppression gain based on the input spectrum and the noise spectrum; a suppression-gain combining unit configured to calculate third suppression gain by combining the first suppression gain and second suppression gain, which is provided as a predetermined constant value or provided by smoothing the first suppression gain, based on the speech-likelihood; and a multiplying unit obtaining an output spectrum by multiplying the input spectrum by the third suppression gain.

主权项

1. A noise suppressing device for suppress a noise component included in an input signal, the noise suppressing device comprising:
a processor; and a non-transitory storage medium containing program instructions, execution of which by the processor causes the noise suppressing device to provide functions of
a noise estimating unit configured to estimate a noise spectrum based on an input spectrum obtained by performing a frequency analysis on the input signal;a speech-likelihood calculating unit configured to calculate speech-likelihood based on the input spectrum and the noise spectrum;a suppression-gain calculating unit configured to calculate first suppression gain based on the input spectrum and the noise spectrum;a suppression-gain combining unit configured to calculate third suppression gain by combining the first suppression gain and second suppression gain, which is provided as a predetermined constant value or provided by smoothing the first suppression gain, based on the speech-likelihood; anda multiplying unit obtaining an output spectrum by multiplying the input spectrum by the third suppression gain.