Noise elimination method and device

Abstract

The invention provides a noise elimination method and device applied to the technical field of audio noise reduction. The method comprises that a reception signal is preprocessed to obtain first frequency-domain signals, in different frequency points of the frequency domain, of the reception signal; blind source separation is carried out on the first frequency-domain signals according to an independent composition analysis algorithm to obtain frequency-domain voice signals of the different frequency points and frequency-domain noise signals of the different frequency points; and the frequency-domain voice signals are converted from the frequency domain to the time domain, and a voice signal realized by eliminating noise from the reception signal is obtained according to a conversion result. Compared with a present noise elimination method, the distance between two microphones needs not to be limited, and noises are eliminated directly.

Description

technical field [0001] The invention relates to the technical field of audio noise reduction, in particular to a noise elimination method and device. Background technique [0002] In daily work and life, voice communication is an indispensable way of communication between people to transmit information to each other. In speech communication, the speech signal is inevitably disturbed by the noise in the surrounding environment. In the end, what the listener gets is a noisy speech signal polluted by noise, which seriously affects the communication between the two parties. [0003] In the prior art, for a device with a dual-microphone array, the microphone array is generally used to beamform the signal collected by the microphone to obtain an enhanced speech signal and a weakened speech signal, and to detect whether there is noise in the signal collected by the microphone , and update the coefficients of the adaptive filter according to the detection results, and filter the e...

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Problems solved by technology

[0004] However, the above-mentioned noise reduction method based on a dual-microphone array is generally a large-distance microphone noise reduction method, that is, in order to ensure that the filter coefficients can be updated better, the above-mentioned method usually has certain requirements for the distance between the two microphones. Among them, one microphone is close to the voice source, and the other microphone is far away from the voice source. Therefore, although the above method can be used to perform adaptive filtering and tracking to eliminate noise, there is a certain limit on the distance between the two microphones.

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