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Voice direction-of-arrival estimation method and device

A direction-of-arrival estimation and direction-of-arrival technology, applied to measuring devices, orientators for determining directions, systems for determining directions or offsets, etc., can solve problems such as weak anti-reverberation ability, insufficient estimation accuracy, and weak anti-noise ability and other problems to achieve the effect of improving the estimation accuracy and resolution

Inactive Publication Date: 2020-11-13
成都启英泰伦科技有限公司
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AI Technical Summary

Problems solved by technology

[0004] 1. Weak anti-reverberation ability;
[0005] 2. Weak anti-noise ability;
[0006] 3. The estimated resolution is low;
[0007] 4. Insufficient estimation accuracy

Method used

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  • Voice direction-of-arrival estimation method and device
  • Voice direction-of-arrival estimation method and device
  • Voice direction-of-arrival estimation method and device

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Embodiment Construction

[0039] Specific embodiments of the present invention will be further described in detail below.

[0040] Voice direction of arrival estimation method of the present invention, such as figure 1 shown, including the following steps:

[0041] S1: Split the broadband voice signal received by the microphone array into multiple narrowband voice signals; divide the 0-180 degree airspace into multiple initial airspace grids;

[0042] S2: Calculate the steering vector and covariance matrix of each frequency point in each narrowband speech signal, separate the signal subspace and the noise subspace, and solve the spatial spectrum energy of each grid point in the spatial grid; The grid point judges the estimated direction of arrival;

[0043] S3: Through the direction of arrival obtained in step S2, add grid points in the grid interval where there may be targets; continue to repeat step S2 on the reduced grid after adding grid points to correct the direction of arrival until reaching t...

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Abstract

The invention discloses a voice direction-of-arrival estimation method. The method comprises the following steps of S1, splitting a broadband voice signal received by a microphone array into a plurality of narrowband voice signals; dividing the airspace into a plurality of initial airspace grids; S2, calculating a steering vector and a covariance matrix of each frequency point in each narrowband voice signal, separating a signal subspace from a noise subspace, and solving spatial spectrum energy in each grid direction; the estimated direction of arrival is judged through grid points corresponding to the spatial spectrum energy peak value; S3, through the direction of arrival obtained in the step S2, adding grid points in a grid interval in which a target possibly exists; and continuously repeating the step S2 on the reduced grid after the grid points are added to correct the direction of arrival until the upper limit of grid addition is reached. By the adoption of the voice direction-of-arrival estimation method, grid points are added in a self-adaptive mode in the estimation process, estimation precision and resolution of the voice signal direction-of-arrival method can be improved.

Description

technical field [0001] The invention belongs to the technical field of voice intelligent recognition, and relates to voice front-end signal processing, in particular to a voice direction-of-arrival estimation method and device. Background technique [0002] The direction of arrival estimation algorithm is mainly used to estimate the angle information between the sound source target and the microphone array. Inputting the estimated angle data into the speech enhancement system can effectively enhance the speech signal in this direction and suppress the noise signals in other directions. At present, the direction-of-arrival estimation algorithm of the voice signal usually adopts a method based on the time difference of arrival for estimation. However, when the signal-to-noise ratio of the input signal is reduced and the reverberation is severe. The performance of such algorithms will drop significantly. Moreover, when the number of target sound sources increases, this type o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S3/802
CPCG01S3/8027
Inventor 谭祚何云鹏许兵
Owner 成都启英泰伦科技有限公司
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