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Method and system for estimating number of sound sources

A sound source orientation and sound source technology, applied in the field of signal processing, can solve the problems of large estimation error of the number of sound sources and affect the effect of speech signal processing, etc., to reduce estimation error, improve the speed of sound source number estimation, and avoid eigenvalues The effect of decomposition

Pending Publication Date: 2022-07-08
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method and system for estimating the number of sound sources to solve the problem of the number of sound sources existing in the prior art when the reverberation in the environment is relatively strong or the background noise does not meet the requirements of full Gaussian white noise. The estimation error is large, which will affect the technical problem of the subsequent speech signal processing effect

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  • Method and system for estimating number of sound sources
  • Method and system for estimating number of sound sources

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Embodiment 1

[0029] Please see attached figure 1 , the present invention provides a method for estimating the number of sound sources, wherein the method is applied to a system for estimating the number of sound sources, and the method specifically includes the following steps:

[0030] Step S100: Receiving the first signal y through the microphone array m (t);

[0031] Specifically, the method for estimating the number of sound sources is applied to the system for estimating the number of sound sources, and the single sound source can be sequentially performed on each frequency point in the transform domain signal after the short-time Fourier transform. DOA estimation, and then a quick estimation after statistical analysis to obtain an accurate and reliable number of sound sources.

[0032] Estimation of the number of sound sources is the basis of speech signal processing. Before calculating and estimating the number of sound sources, the microphone array is used to receive the sound so...

Embodiment 2

[0087] Based on the same inventive concept as the method for estimating the number of sound sources in the foregoing embodiment, the present invention also provides a system for estimating the number of sound sources, please refer to the appendix image 3 , the system includes:

[0088] The first obtaining unit 11, the first obtaining unit 11 is configured to receive and obtain the first signal y through the microphone array m (t);

[0089] The second obtaining unit 12, the second obtaining unit 12 is configured to perform short-time Fourier transform on the first signal to obtain a transform domain signal Y m (k,l);

[0090] a third obtaining unit 13, the third obtaining unit 13 is configured to perform single-source DOA estimation on multiple frequency points in the transform domain signal, respectively, to obtain an estimation result;

[0091] a fourth obtaining unit 14, the fourth obtaining unit 14 is configured to, within the estimation result, statistically obtain the...

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Abstract

The invention discloses a method and system for estimating the number of sound sources, and relates to the technical field of signal processing, and the method comprises the steps: receiving and obtaining a first signal ym (t) through a microphone array; performing short-time Fourier transform to obtain a transform domain signal Ym (k, l); performing single sound source DOA estimation on the plurality of frequency points to obtain estimation results; counting the estimated frequencies of different sound source orientations in a preset time period to obtain a statistical frequency result Q (theta); searching a peak point, obtaining a plurality of sound source orientations of which the frequencies are greater than a threshold value tau 1, and obtaining a sound source number estimation result; and updating the number of the current active sound sources. The technical problems that in the prior art, when environment reverberation is strong and background noise does not meet the Gaussian white noise requirement, the sound source number estimation error is large, and the follow-up voice signal processing effect is affected are solved, and the technical effects that the sound source number in the complex acoustic environment is estimated rapidly and accurately, and the sound source number estimation error is reduced are achieved.

Description

technical field [0001] The invention relates to the technical field of signal processing, and in particular, to a method and system for estimating the number of sound sources. Background technique [0002] The estimation of the number of sound sources has always been a hot topic in the field of speech signal processing. Many classical signal processing methods need to know the number of sound sources. For example, the multi-signal classification method (MUSIC) in the direction of arrival (DOA) estimation, its working premise is that the number of sound sources is known, and then the MUSIC method divides the signal subspace and the noise subspace according to the number of sound sources to calculate The spatial spectrum is obtained, and finally the orientation of multiple sound sources is determined by finding the position of the extreme point on the spatial spectrum. However, if there is an error between the estimated number of sound sources and the actual number of sound s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L25/18G10L25/21G10L21/0216G06F17/18
CPCG10L25/18G10L25/21G10L21/0216G06F17/18G10L2021/02166
Inventor 潘超赵旭东陈景东
Owner NORTHWESTERN POLYTECHNICAL UNIV