Target voice enhancement device and method

Abstract

The invention relates to a target voice enhancement device. The device comprises an acoustic vector sensor used for acquiring an audio signal, a high-order space matching wave beam former, a nulling filter and a back Wiener filter, wherein wave beam processing on the audio signal acquired by the acoustic vector sensor is carried out through the high-order space matching wave beam former, the nulling filter and the back Wiener filter which are sequentially connected, and enhancement of a target direction voice is realized. The invention further provides a target voice enhancement method. According to the method, the sound source orientation information can be effectively utilized to inhibit a space interference source and background noise, the target direction voice can be enhanced, distortion of the target voice after enhancement is small, and a hearing perception evaluation score is relatively high. The device is advantaged in that the device has relatively low calculation complexity and has application and popularization values on micro equipment.

Description

technical field [0001] The present invention relates to the technical field of speech signal processing, in particular to a device and method for enhancing target speech based on high-order beamforming technology of an acoustic vector sensor. Background technique [0002] In the actual environment, when the microphone picks up voice signals, it will inevitably be interfered by ambient noise, transmission medium noise, internal electrical noise of communication equipment, room reverberation, and other speakers' voices, so the quality of the voice picked up is affected . Speech enhancement technology is one of the core technologies in the field of speech processing. It can extract clean target speech from noisy speech to improve the speech quality at the receiving end, improve the clarity, intelligibility and comfort of speech, and make it easy for people to accept Or improve the performance of speech processing systems. [0003] The research on speech enhancement technology...

AI Technical Summary

Problems solved by technology

[0015] The purpose of the present invention is to overcome the disadvantages and deficiencies of the single-channel speech enhancement method, which cannot suppress spatial interference noise due to the inability to utilize the spatial orientation information of the sound source, and the speech enhancement method of the traditional microphone array is limited by the large volume of the array, complex calculation and difficult portable devices, Provided is a device for enhancing target speech, which can effectively suppress spatial interference sources and background noise by using sound source orientation information, and enhance target speech, the enhanced target speech has a small degree of distortion and a high auditory perception evaluation score; at the same time The device has low computational complexity and has great advantages in the application and promotion of small equipment

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