| 摘要 |
FIELD: physics. ^ SUBSTANCE: said utility invention relates to voice signal enhancement technique for enhancement of communication in the presence of background noise. In one invention version, a method for suppressing noise in the voice signal is proposed, which, for a voice signal having a spectral representation in the form of a set of frequency bins, involves the determination of a transmission scale factor for at least some of the said frequency bins, and the calculation of smoothed transmission scale factors. The calculation of smoothed transmission scale factors involves, at least for some of the frequency bins, combining the current value of the transmission scale factor and the smoothed transmission scale factor determined previously. The other invention version involves the separation of the frequency bin set into the first set of adjacent frequency bins and the second set of adjacent frequency bins with a border frequency between them, which separates the areas of application of various noise suppression methods, the change in the border frequency value being a function of the spectral structure of the voice signal. ^ EFFECT: efficient noise suppression by decreasing background noise level in voice signal. ^ 79 cl, 4 dwg |
