SPEECH QUALITY ENHANCEMENT WITH MULTIPLE SENSORS USING SPEECH STATUS MODEL Russian patent published in 2011 - IPC G10L15/20 G10L21/02 

FIELD: information technology.

SUBSTANCE: alternative sensor signal is generated, wherein the alternative sensor is less sensitive to ambient noise than the microphone which is based on the principle of air conduction. A signal of the air conduction based microphone is generated. The signal of the alternative sensor and the signal of the air conduction based microphone are used to estimate the likelihood L(S_t) of the speech status S_t by estimating the separate likelihood component for each of the set of frequency components and merging the separate likelihood components to form an estimate of the likelihood of the speech status. The likelihood the speech status is used to estimate the value of reduced noise, which models the value of the reduced noise for the given speech status. The likelihood of the speech status is used together with the signal of the alternative sensor and the air conduction based microphone in order to estimate the value of clean speech for the clean speech signal.

EFFECT: generation of a high-quality speech signal.

13 cl, 6 dwg