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A method for calibrating a microphone array, a sound source localization method, and related equipment

A microphone array and microphone technology, which can be used in positioning, instruments, measuring devices, etc., to solve problems such as poor calibration results and ignoring microphone correlations.

Active Publication Date: 2021-02-02
ZHEJIANG DAHUA TECH CO LTD
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Problems solved by technology

The method of obtaining calibration results by this sound source localization calibration method ignores the influence of the performance parameter change of each microphone, and ignores the correlation between each microphone, therefore, the accuracy of the calibration result obtained by this calibration method is poor.

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  • A method for calibrating a microphone array, a sound source localization method, and related equipment
  • A method for calibrating a microphone array, a sound source localization method, and related equipment
  • A method for calibrating a microphone array, a sound source localization method, and related equipment

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Embodiment Construction

[0052] In order to better understand the technical solutions provided by the embodiments of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation manners.

[0053]In order to improve the accuracy of the obtained calibration value of the quasi-microphone array, the implementation of the present application relates to a method for calibrating the microphone array. The microphone array involved in the method in the embodiment of the present application will be introduced below.

[0054] Please refer to figure 1 , figure 1 A microphone array is shown, and the microphone array 110 includes N microphones 120 and set sound source position points 130 . The performance parameters of the multiple microphones 120 are consistent, such as sampling rate, sampling accuracy, number of channels, and bit rate. The distances from the N microphones 120 to the set sound source point 130 are all equal. The se...

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Abstract

The present application provides a method for calibrating a microphone array, a method for localizing a sound source and related equipment, which are used to improve the accuracy of obtained calibration values ​​of the microphones. The method comprises: collecting sound data from a set sound source point through N microphones in the microphone array; wherein, the distances from the N microphones to the set sound source point are all the same; according to the sound data of the N microphones, using a preset The correlation coefficient algorithm obtains the correlation coefficients of every two microphones in the N microphones; according to the correlation coefficients in the correlation coefficients that are less than the preset correlation coefficient threshold, determine the associated corresponding M microphones; based on the N microphones except M According to the sound data of every two microphones in the remaining microphones except the first microphone, the time delay difference of the sound data collected by every two microphones in the remaining microphones is obtained; based on the time delay difference, each microphone that needs to be calibrated among the remaining microphones is determined. Corresponding delay calibration value.

Description

technical field [0001] The present application relates to the technical field of sound source localization, and in particular to a method for calibrating a microphone array, a sound source localization method and related equipment. Background technique [0002] In many occasions related to voice interaction, such as voice assistants and consumer electronic products such as mobile phones that complete voice communication, microphone arrays are commonly used to determine the user's location based on the user's voice, and perform voice enhancement on the voice at the location. Microphone arrays usually need to be calibrated before the device leaves the factory. [0003] In the prior art, a method for calibrating a microphone array generally includes: testing the calibration parameters of a single microphone, and taking the sum of the parameters of the single microphone as the calibration result of the microphone array. The method of obtaining the calibration result by the soun...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/24
CPCG01S5/24
Inventor 陈烈
Owner ZHEJIANG DAHUA TECH CO LTD
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