Speech enhancement method and device applicable to strong noise environments

Abstract

The invention discloses a speech enhancement method and device applicable to strong noise environments. The method comprises establishing an air conduction speech sensor speech detection and non-air conduction speech sensor speech detection combined model under a clean environment; estimating a noise model of a currently received air conduction speech sensor speech detection signal according to a speech signal detected by a non-air conduction speech sensor; correcting parameters of the combined model by using the obtained noise model; and enhancing the air conduction speech sensor speech detection signal through the combined model before and after correction, and outputting enhanced speech signals. The device comprises an air conduction speech sensor, the non-air conduction speech sensor, a multi-channel data acquisition module, a noise model estimation module, a combined model correction module, a speech enhancing module and a training and self-adaptive module for the combined model. Compared with the prior art, the speech enhancement method and device have the advantages of being strong in noise immunity, good in speech quality and the like.

Description

technical field [0001] The invention relates to the field of signal processing, in particular to a speech enhancement method and device which can be used in a strong noise environment. Background technique [0002] Speech is the most natural means of human communication, but in practical applications such as voice communication and speech recognition, there are often various environmental noises. When these environmental noises are strong, it will seriously affect the quality of voice communication and the correct rate of recognition. For example, in noisy environments such as factories and assemblies, not only the sound quality and intelligibility of voice communication will deteriorate significantly, but also the recognition rate of speech recognizers will drop sharply. [0003] Speech enhancement is a commonly used method to reduce the impact of environmental noise and improve the quality of voice communication. It can also be used for preprocessing of speech before reco...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the shortcomings of the existing voice enhancement technology based on air conduction voice sensor in poor noise environment and the poor sound quality of non-air conduction voice sensor, the present invention provides a voice enhancement method that can be used in strong noise environment. Combining the air conduction speech sensor and the non-air conduction speech sensor, the joint model of the air conduction speech sensor detection speech and the non-air conduction speech sensor detection speech is firstly established, and the acoustic noise model is accurately estimated by using the non-air conduction speech sensor detection speech during enhancement , and modify the parameters of the joint model accordingly, and then use the revised joint model to enhance the input voice detected by the air conduction speech sensor

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