Beam direction switching method and device based on microphone array

A microphone array and beam pointing technology, which is applied in voice analysis, instrumentation, network planning, etc., can solve the problems of inability to adapt to the rapid time-varying nature of the user's random mobility propagation channel, and single application scenarios, so as to ensure that the signal is not distorted and phase avoidance Error, the effect of improving applicability

Active Publication Date: 2019-01-01
GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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Problems solved by technology

Moreover, since the method can adapt to the mobility of the user, the method is not limited to scenarios where the position of the sound source and the position of the noise source are relatively fixed, and the applicability of the method is improved to solve the problem of the beamforming method in the prior art The application scenario is relatively single, and the technical problems that cannot adapt to the random mobility of users and the fast time-varying nature of the propagation channel

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  • Beam direction switching method and device based on microphone array
  • Beam direction switching method and device based on microphone array
  • Beam direction switching method and device based on microphone array

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Embodiment Construction

[0033] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0034] This application mainly aims at the technical problems that the application scenarios of the beamforming method in the prior art are relatively single, and cannot adapt to the random mobility of users and the rapid time-varying nature of the propagation channel, and proposes a beam-pointing switching method based on a microphone array.

[0035] In the microphone array-based beam pointing switching method of the embodiment of the present application, by determining the phase delay information between the microphones in the m...

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Abstract

The present invention provides a beam direction switching method and device based on a microphone array, and the method comprises the steps: determining phase delay information between microphones inthe microphone array; acquiring sound source signals collected by all microphones in the microphone array; performing beam forming of the sound source signals collected by the microphones to obtain output signals of the microphone array in the preset all beam directions; determining a target beam direction from the fixed beam directions according to the energy values of the output signals of the microphone array in the fixed beam directions; switching the beam direction of the microphone array to the target beam direction. The method can select an optimal beam direction from the preset fixed beam directions according to the position of a user, can enable the determined beam direction to adapt to the mobility of the user, and improves the applicability of the method.

Description

technical field [0001] The present invention relates to the technical fields of information processing and voice recognition, in particular to a microphone array-based beam pointing switching method and device. Background technique [0002] At present, the beamforming method in voice front-end processing is as follows: when a desired target user enters a small area, a certain fixed beam is used to track the target user located in the small area. When the target user moves in a small area, the direction of the main beam is adaptively adjusted to track the target user. [0003] However, this beamforming method is only applicable to the scene where the position of the sound source and the position of the noise source are relatively fixed, and the application scene is relatively single. Moreover, the beamforming method has a slow convergence speed and cannot adapt to the random mobility of users and the fast time-varying nature of propagation channels. Contents of the inventi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/0216H04W16/28H04W72/04
CPCG10L21/0216G10L2021/02166H04W16/28H04W72/046
Inventor 席红艳
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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