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
CN109119092AActive Publication Date: 2019-01-01GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GD MIDEA AIR-CONDITIONING EQUIP CO LTD
Publication Date
2019-01-01

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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.
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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...

Claims

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