FIELD: information technology.
SUBSTANCE: invention relates to noise rejection means. Receive an internal noise by a noise rejection device, received by a speech perception control mechanism and a speech signal containing external noise received by a main speech perception mechanism when the speech signal is input. Extract an internal signal feature which corresponding to the internal noise, wherein the internal signal feature is a sequence of energy spectrum frames. Calculate an external feature of approximation, corresponding to external noise, based on the internal signal feature and predefined mapping formula, wherein the external feature of approximation is a sequence of frames in the form of energy spectrum. Convert the external feature of approximation into the estimation of a noise signal by inverse Fourier transformation. Carry out a predetermined process of noise rejection based on the estimation of the noise signal and a received speech signal containing external noise to obtain a noise-free speech signal.
EFFECT: high efficiency of noise rejection.
10 cl, 6 dwg
