Robustness sound source space positioning method of distributed microphone array network

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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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 collected by the microphones on different nodes are not synchronized; secondly, there are multiple microphone arrays in the distributed microphone array network sound source localization system, and the relative position of each microphone array in space is unknown ; In addition, there is still the problem of being sensitive to room reverberation and unable to meet the positioning accuracy

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