Robustness sound source space positioning method of distributed microphone array network

A microphone array and spatial positioning technology, applied in the voice field, can solve the problems of sensitive room reverberation, inability to meet positioning accuracy, and out-of-sync microphone signals

Active Publication Date: 2016-03-09
TSINGHUA UNIV
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Problems solved by technology

[0006] However, these microphone array sound source localization methods are not completely suitable for distributed microphone array network sound source localization. First, because the above-mentioned technologies assume that all microphones are synchronized, and in a distributed microphone array scenario, only the same node The microphones are synchronized, and the signals collec

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  • Robustness sound source space positioning method of distributed microphone array network
  • Robustness sound source space positioning method of distributed microphone array network
  • Robustness sound source space positioning method of distributed microphone array network

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Embodiment Construction

[0053] The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.

[0054] Such as figure 1 as shown,

[0055] figure 1 It is an overall flowchart of the sound source spatial positioning method of the present invention.

[0056] (1) Construct a three-dimensional space coordinate system; (2) Estimate the time difference of arrival and reduce reverberation interference; (3) Estimate the position of the sound source; (4) Finally determine the position of the sound source.

[0057] The details of the entire calculation process in the embodiment of the present invention are as follows:

[0058] 1. Construct a three-dimensional space coordinate system

[0059] Assume that the distributed microphone array network has N≥2 microphone arrays as network nodes, and the microphone array is a linear array, that is, the microphones on the array are in a straight line and the actual physical distance between the microphones...

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Abstract

The invention provides a robustness sound source space positioning method of a distributed microphone array network. The method comprises the steps of: constructing a three-dimensional spatial coordinate system, estimating an arriving time difference and reducing reverberation interference, estimating a sound source position, and finally determining the sound source position. According to the invention, two microphone arrays are used for determining three-dimensional spatial coordinates, and time delay information in the microphone array network is fully utilized for reducing interference caused by indoor reverberation; and a spatial coordinate area is divided, and the spatial position of a sound source is finally determined by means of twice estimation. The robustness sound source space positioning method has the advantages that the performance and the calculation cost are superior to an existing technology, the application is wide, the structure is simple, the cost is low, and the method is applicable to intelligent household and intelligent monitoring scenes utilizing the distributed microphone array network.

Description

technical field [0001] The invention belongs to the technical field of speech, and in particular relates to a robust sound source spatial positioning method for a distributed microphone array network. Background technique [0002] With the continuous development of software and hardware technology, distributed sensor networks have gradually become popular in the civilian market. In scenarios such as environmental monitoring, security monitoring, and smart home, it is necessary to use the sound source location function, such as monitoring the noise source of the environment; when the light is insufficient, the monitoring video is powerless, and sound source detection and location are required at this time; intelligent Sound source localization in home scenes can improve the effect of human-computer interaction. [0003] A common device used for sound source localization is a microphone array, which is generally defined as a device in which multiple (usually more than three) ...

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Application Information

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IPC IPC(8): G01S5/22
CPCG01S5/22
Inventor 杨毅孙甲松
Owner TSINGHUA UNIV
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