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A Single Sound Source Localization Method Based on Phase Difference Regression

A technology of sound source localization and phase difference, which can be used in localization, instruments, measurement devices, etc., and can solve problems such as large amount of calculation and lack of acoustic robustness.

Active Publication Date: 2019-05-17
INST OF ACOUSTICS CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of large amount of calculation and lack of acoustic robustness in the existing single sound source localization method, and propose a robust and efficient single sound source localization method by using phase difference regression

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  • A Single Sound Source Localization Method Based on Phase Difference Regression
  • A Single Sound Source Localization Method Based on Phase Difference Regression
  • A Single Sound Source Localization Method Based on Phase Difference Regression

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Embodiment Construction

[0062]The present invention will be further described now in conjunction with accompanying drawing.

[0063] refer to figure 1 , the method of the present invention comprises the following steps:

[0064] Step 101), converting the sound source signal received through the microphone array into a digital sound signal; wherein, the microphone array includes K microphones.

[0065] Step 102), preprocessing the digital sound signal, and then extracting the frequency spectrum of the digital sound signal of each microphone through Fast Fourier Transform (FFT).

[0066] The preprocessing of the digital sound signal includes: first padding the digital sound signal of each frame to N points, N=2 i , i is an integer, and i≥8; then, perform windowing or pre-emphasis processing on the digital audio signal of each frame, and the windowing function adopts Hamming window (hamming) or Hanning window (hanning).

[0067] Fast Fourier transform is performed on the digital sound signal at time ...

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Abstract

The invention relates to a single sound source localization method based on phase difference regression. The single sound source localization method comprises the steps of converting a sound source signal received through a microphone array into a digital sound signal; preprocessing the digital sound signal, and then extracting the spectrum of the digital sound signal of each microphone in the microphone array; calculating a spatial correlation matrix of each frequency point at time t using the spectrums of the digital sound signals of all the microphones at the same frequency point at adjacent time; decomposing the spatial correlation matrix at each frequency point is at time t to obtain a main eigenvector at each frequency point at time t; solving a phase difference set of M pairs of microphones at each frequency point at time t by using the main eigenvector at each frequency point at time t; and by an iterative method, conducting regression of the phase difference to obtain an incident direction angle of the sound source at time t.

Description

technical field [0001] The invention relates to a sound source localization method, in particular to a single sound source localization method based on phase difference regression. Background technique [0002] Sound source localization includes single sound source localization and multiple sound source localization. The sound source localization technology can indicate the spatial orientation of the sound source target and provide important spatial information for subsequent information collection and processing. [0003] Due to the advantages of high time resolution and high computational efficiency, phase difference regression is widely used to estimate direction of arrival. However, traditional regression methods seldom use planar arrays for DOA estimation. At the same time, traditional regression methods ignore two issues, one is the periodicity of the phase difference, and the other is that signal enhancement can effectively suppress acoustic interference. In additio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/22
CPCG01S5/22
Inventor 应冬文黄兆琼战鸽颜永红
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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