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Multi-sound-source positioning method for eliminating association ambiguity based on two-step screening

A localization method and multi-sound source technology, which can be used in localization, speech analysis, measurement devices, etc., can solve problems such as association ambiguity, high localization accuracy, and low computational complexity, and achieve the effect of reducing computational time and high localization accuracy.

Inactive Publication Date: 2021-04-23
EAST CHINA JIAOTONG UNIVERSITY
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Problems solved by technology

[0008] The purpose of the present invention is to propose a multi-sound source location method based on two-step screening to eliminate associated ambiguity, which can be effectively used to solve the problem of associated ambiguity based on TDOA multi-sound source location, and has higher positioning accuracy and lower Computational complexity

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  • Multi-sound-source positioning method for eliminating association ambiguity based on two-step screening
  • Multi-sound-source positioning method for eliminating association ambiguity based on two-step screening
  • Multi-sound-source positioning method for eliminating association ambiguity based on two-step screening

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[0047]The invention will be described in detail below with reference to the accompanying drawings. However, it should be understood that the accompanying drawings will not be better understood by the invention, and they should not be understood to be limited to the present invention.

[0048]figure 1 For the present invention, a multi-acoustic source positioning method based on two-step screening elimination associated blur, such asfigure 1 The method includes the following steps:

[0049]1) Construction of an array structure suitable for use in the correlation of the associated fuzzy based on TDOA multi-acoustic source. In order to better embody the method proposed in the present invention, the method of the present invention is verified that the three-dimensional space is considered with a small number of microphones. Take five positioning microphones as an example, the positioning microphone array structure is set to M1-M2-M3-M4-M5; the array structure for verifying the microphone arra...

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Abstract

The invention discloses a multi-sound-source positioning method for eliminating association ambiguity based on two-step screening. The method comprises the following steps of: (1) constructing an array structure suitable for eliminating association ambiguity based on TDOA multi-sound-source positioning; (2) obtaining all possible TDOA sequences through time error sequence processing; (3) estimating all possible sound source positions based on a Chan algorithm; (4) calculating a difference value between the TDOA of the obtained positioning sub-array and the TDOA of the sub-array from which all estimated sound source positions are calculated to other combinations, and taking difference value minimization as a first-step false sound source screening principle; and (5) counting the difference value of each time, performing comparing and matching to obtain a corresponding position, and taking the occurrence frequency as a second-step screening principle. False sound sources are screened and filtered through the two steps, and the problem of the association ambiguity of TDOA-based multi-sound-source positioning is solved. The two-step screening method not only can solve the problem of TDOA-based multi-sound-source association ambiguity, but also can obtain better positioning performance with lower calculation complexity.

Description

Technical field[0001]The present invention belongs to the field of sound source positioning, and in particular, the multi-acoustic source positioning method for eliminating associated blurring based on two-step screening.Background technique[0002]Sound source positioning is widely used in sensor networks, target tracking, and wireless communications. The sound source positioning uses the spatial distribution microphone to acquire the signal emitted by the sound source, and the received signal can be appropriately modeled, and the positioning parameters obtained by the microphone measurement, such as the time difference (TDOA: TIME DIFCERENCE OF ARRIVAL) is constructed Linear equations that solve the nonlinear equation group to get a target sound source location. The TDOA positioning method has a large advantage for single-source positioning, for the three-dimensional spatial distribution of sound sources, only the target sound source is detected to the arrival of the microphone. YTC...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/20G10L21/0216
CPCG01S5/20G10L21/0216G10L2021/02166
Inventor 刘海涛陈永华
Owner EAST CHINA JIAOTONG UNIVERSITY
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