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Robust sound source positioning system and method

A sound source localization and sound source technology, applied in the field of positioning, can solve problems such as large positioning errors, and achieve the effect of improving universality

Active Publication Date: 2020-06-19
ARMY ENG UNIV OF PLA
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  • Claims
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AI Technical Summary

Problems solved by technology

It effectively avoids the errors caused by the time difference positioning method under the sound source positioning in the prior art, and the defect that a large positioning error will be generated in an environment where the microphone has a large noise

Method used

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  • Robust sound source positioning system and method
  • Robust sound source positioning system and method
  • Robust sound source positioning system and method

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Embodiment Construction

[0056] Aiming at the problem of time difference localization in the existing sound source localization, a valuable idea is how to improve the convergence performance of the localization algorithm in the case of microphones with large errors while maintaining the advantages of the Newton iterative method.

[0057] On the premise of linearizing and iteratively solving nonlinear equations, the present invention adaptively updates the weights in the weighted least squares, dynamically corrects the weights of the equations, and minimizes the influence of the equations where the microphones with large potential errors are located . Firstly, the initial stage of the iteration is determined according to the rough positioning results of multiple groups of three microphones, so as to have a high probability of finding the global optimal solution; secondly, a dynamic weight correction technology is introduced in the weighted least squares, and each iteration gradually reduces the error wi...

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Abstract

The invention discloses a robust sound source positioning system and method. The method comprises the following steps: step 1, establishing a time difference equation set; 2, estimating a time difference tauij; 3, implementing a sound velocity processing mode; 4, solving an equation by a regularization Newton method; 5, setting an initial solution; and 6, carrying out weight initialization and self-adaptive updating. In combination with other structures or methods, the defects that in the prior art, errors can be caused by a time difference positioning method under sound source positioning, and large positioning errors can be generated under the environment that a microphone has large noise are effectively overcome.

Description

technical field [0001] The present invention relates to the field of localization technology, and also to the field of sound source technology, in particular to a robust sound source localization system and its method, in particular to a robust sound source localization system and its method based on adaptive weighted least squares. Background technique [0002] Artificial intelligence has received more and more attention in the computer field. And it is applied in robots, economic and political decision-making, control systems, and simulation systems. In recent years, with the development of artificial intelligence technology, sound source localization technology has been applied in more and more scenarios. And because of its advantages of good concealment, high positioning accuracy, and low cost, it occupies an important position in the fields of intelligent voice, sonar, and battlefield monitoring. Generally, solutions for sound source localization include methods such ...

Claims

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Application Information

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IPC IPC(8): G01S5/22
CPCG01S5/22
Inventor 王艺敏苏洋徐智勇周华李建华郑吉林吴传信张宝富
Owner ARMY ENG UNIV OF PLA
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