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Method and device for locating sound source direction of microphone array

A microphone array and direction positioning technology, applied in the field of signal processing, can solve the problem of low positioning accuracy and achieve the effect of eliminating phase ambiguity

Active Publication Date: 2019-03-01
BEIJING SINOVOICE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] An embodiment of the present invention provides a method for locating a sound source direction of a microphone array to solve the problem of low positioning accuracy of the existing method for locating the direction of a sound source of a microphone array

Method used

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  • Method and device for locating sound source direction of microphone array
  • Method and device for locating sound source direction of microphone array

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Embodiment 1

[0063] refer to figure 1 , which shows a flow chart of Embodiment 1 of a method for locating a sound source direction of a microphone array according to the present invention, which may specifically include the following steps:

[0064] Step 101. Estimate the sound source direction according to the basic array element and the current array element to obtain a first estimation result; wherein, the current array element is an array element adjacent to the basic array element;

[0065] The embodiments of the present invention can be applied to terminals and scenarios equipped with microphone arrays, such as smart phones, tablet computers, laptop computers, vehicle-mounted computers, desktop computers, set-top boxes, smart TVs, wearable devices, etc. , and sonar detection, video teleconferencing, artificial intelligence, voice tracking and recognition, monitoring systems and other scenarios, it is used to locate the direction of the sound source.

[0066] In the embodiment of the...

Embodiment 2

[0146] refer to Figure 4 , which shows a structural block diagram of Embodiment 2 of a sound source direction localization device for a microphone array according to the present invention, which may specifically include the following modules: a first estimation module 401, a first determination module 402, a defuzzification module 403, and a second estimation module 404 and the second determination module 405; wherein,

[0147] The above-mentioned first estimation module 401 can be used to estimate the sound source direction according to the basic array element and the current array element, so as to obtain the first estimation result; wherein, the current array element is an array adjacent to the basic array element Yuan;

[0148] The first determining module 402 may be configured to determine that an array element adjacent to the current array element is the current array element;

[0149] The defuzzification module 403 may be configured to perform distance defuzzificatio...

Embodiment 3

[0157] refer to Figure 5 , shows a structural block diagram of Embodiment 3 of a sound source direction localization device for a microphone array according to the present invention, which may specifically include the following modules: a first estimation module 501, a first determination module 502, a defuzzification module 503, and a second estimation module 504 and the second determination module 505; wherein,

[0158] The above-mentioned first estimation module 501 can be used to estimate the sound source direction according to the basic array element and the current array element, so as to obtain the first estimation result; wherein, the current array element is an array adjacent to the basic array element Yuan;

[0159] The first determining module 502 may be configured to determine that an array element adjacent to the current array element is the current array element;

[0160] The defuzzification module 503 may be configured to perform distance defuzzification on t...

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Abstract

The embodiment of the invention provides a method and device for locating a sound source direction of a microphone array, wherein the method comprises steps of: estimating the sound source direction according to a basic array element and a current array element to obtain a first estimated result; determining an array element adjacent to the current array element is a current array element; performing space defuzzification on the basic array element and the current array element based on the first estimated result to obtain an N-2 defuzzification result; estimating the sound source direction according to the N-2 defuzzification result, the base array element and the current array element to obtain an N-1 estimated result and returning to the step of determining the array element adjacent to the current array element is a current array element until the N is equal to M; and determining a final sound source direction based on the first estimated result and the N-1 estimated result. The method and device can improve the positioning accuracy of the sound source direction.

Description

technical field [0001] The invention relates to the technical field of signal processing, in particular to a method and device for locating a sound source direction of a microphone array. Background technique [0002] Sound source localization technology is one of the important technologies of array signal processing. At present, it has been widely used in many fields such as sonar detection, video conference, artificial intelligence, voice tracking and recognition, monitoring system, etc. The basic method of sound source localization is to use microphone arrays to calculate the sound source orientation. It is to arrange a group of microphone sensors in different positions in space in a certain way to form a microphone array; use the microphone array to receive the spatial sound source signal, and then the array The received signal is processed, the useful features of the signal are extracted, and then the orientation information of the sound source is obtained through a ce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S15/06
CPCG01S15/06
Inventor 李健张连毅武卫东
Owner BEIJING SINOVOICE TECH CO LTD
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