Method and device for estimating direction of arrival

Abstract

The invention provides a method and device for estimating direction of arrival. The method comprises the following steps: firstly, acquiring voice signals emitted by a sound source and acquired by at least two acquisition modules; secondly, dividing the target space search area according to a preset rule to obtain a plurality of incoming wave incidence angles; then, acquiring a voice existence probability corresponding to each frequency point according to an acquisition module in advance; calculating an estimated value corresponding to each incoming wave incident angle according to the voice existence probability corresponding to each frequency point of each voice signal; and finally, determining the incoming wave incidence angle corresponding to the maximum value in the estimated values corresponding to the incoming wave incidence angles as the incoming wave direction of the sound source. According to the invention, the voice existence probability corresponding to each frequency point is added, and the calculation of each frequency point on the estimation value is determined by the voice existence probability, so that the influence of noise and interference on the estimation of the incoming wave direction is avoided, the accuracy of the estimation of the incoming wave direction is improved, and the accuracy of sound source positioning is improved.

Description

technical field [0001] The present application relates to the technical field of wireless communication, and in particular to a method and device for estimating the direction of arrival. Background technique [0002] In voice communication, sometimes it is necessary to record and save the voices of both parties separately, and separate them into a complete dialogue. In order to achieve accurate sound source positioning, it is very important to provide accurate incoming wave direction. [0003] At present, the direction of arrival estimation method mainly uses SRP-PHAT (Steered Response Power-Phase Transformation, a controllable power response based on phase transformation) to estimate the direction of arrival. Specifically, it is necessary to arrange several microphone array nodes in the distributed array, and One or more acquisition modules (microphones) are arranged at each microphone array node, through which the voice signal is collected by the acquisition module, and t...

AI Technical Summary

Problems solved by technology

[0004] In actual noisy scenarios, such as offices, shopping malls, vehicles, restaurants, or home kitchens, when SRP-PHAT is used to estimate the direction of arrival, there is a minimum aliasing frequency. If the voice signal acquired by the acquisition module is higher than the minimum aliasing frequency When overlapping frequencies, using SRP-PHAT to estimate the direction of arrival will cause phase ambiguity (also called aliasing). Therefore, the direction of arrival estimation is easily affected by noise and interference, which reduces the accuracy of the direction of arrival estimation. lead to inaccurate sound source localization

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