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Double-microphone array beam forming method and device, and equipment

A dual-microphone and beam-beam technology, applied in frequency response correction, speech analysis, instruments, etc., can solve the problems of difficult line layout, small space, and increased cost of microphone arrays, and achieve the effect of improving speech recognition rate and reducing speech distortion

Pending Publication Date: 2021-01-12
大众问问(北京)信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] When designing the placement of microphone arrays, car manufacturers often consider factors such as placement location and wiring layout. In most cases, they tend to place the microphones at the front reading lights in the car, and due to the small space, only two microphones can be placed.
From the perspective of technical implementation, dual-mic beamforming is more difficult, and the suppression effect on the direction of interference is not ideal.
However, increasing the number of microphones in the microphone array will lead to an increase in cost and difficulty in the layout of the microphone array

Method used

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  • Double-microphone array beam forming method and device, and equipment

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Embodiment 1

[0027] figure 1 It is a flow chart of a dual-microphone array beamforming method provided in Embodiment 1 of the present invention. This embodiment is applicable to using a dual-microphone array to suppress interfering voice signals in a preset direction and enhance voice signals in a preset target direction. For example, voice recognition in a vehicle environment, the method can be performed by a dual-microphone array beamforming device, which can be implemented by hardware and / or software, and specifically includes the following steps:

[0028] Step 110: Determine two preset fixed beamforming parameters according to the two preset target orientations, the steering vector of the dual-microphone array, and the preset relationship between the steering vector and the preset fixed beamforming parameters;

[0029] Wherein, the two preset fixed beamforming parameters are in one-to-one correspondence with the two preset target azimuths. The preset target orientation is the directio...

Embodiment 2

[0036] image 3 It is a flow chart of a dual-microphone array beamforming method provided in Embodiment 2 of the present invention. The technical solution of this embodiment is further refined on the basis of the above-mentioned technical solution. The method includes:

[0037] Step 310: Determine two preset fixed beamforming parameters according to the two preset target orientations, the steering vector of the dual-microphone array, and the preset relationship between the steering vector and the preset fixed beamforming parameters;

[0038] Step 320, according to the preset fixed beamforming parameters and the original microphone data, determine the primary fixed beamforming results respectively corresponding to the two preset target azimuths;

[0039] Step 330: Perform at least two stages of nonlinear noise reduction processing according to the two primary fixed beamforming results to obtain a fixed beamforming result.

[0040] Wherein, through at least two stages of non-line...

Embodiment 3

[0055] Figure 4 A schematic structural diagram of a dual-microphone array beamforming device provided in Embodiment 3 of the present invention, the device includes:

[0056] The preset fixed beamforming parameter determination module 410 is used to determine two preset fixed beamforming parameters according to the two preset target orientations, the steering vector of the dual-microphone array, and the preset relationship between the steering vector and the preset fixed beamforming parameters ; Wherein, two preset fixed beamforming parameters correspond to two preset target azimuths one by one;

[0057] The primary fixed beamforming result determination module 420 is configured to determine the primary fixed beamforming results respectively corresponding to two preset target azimuths according to the preset fixed beamforming parameters and the original microphone data;

[0058] The fixed beamforming result obtaining module 430 is configured to perform nonlinear noise reducti...

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Abstract

The embodiment of the invention discloses a double-microphone array beam forming method and device, and equipment. The method comprises the following steps: determining two preset fixed beamforming parameters according to two preset target orientations, a steering vector of a double-microphone array and a preset relationship between the steering vector and the preset fixed beamforming parameters,wherein the two preset fixed beam forming parameters are in one-to-one correspondence with the two preset target orientations; determining primary fixed beam forming results corresponding to the two preset target orientations according to the preset fixed beam forming parameters and microphone original data; and performing nonlinear noise reduction processing according to the two primary fixed beam forming results to obtain a fixed beam forming result. According to the technical scheme provided by the embodiment of the invention, the voice distortion in the target direction is reduced, cleanervoice signals are obtained, and the voice recognition rate is improved under the condition of not increasing the cost and the microphone array line arrangement difficulty.

Description

technical field [0001] Embodiments of the present invention relate to speech signal processing technologies, and in particular to a dual-microphone array beamforming method, device, and equipment. Background technique [0002] Speech enhancement technology based on microphone array has been widely used in communication, human-computer interaction, speech recognition system and so on. [0003] Voice enhancement technology In some usage scenarios, the direction of the voice source is relatively fixed. In this case, it is necessary to enhance the voice of the preset target direction to reduce noise interference. For example, in the vehicle voice interaction scenario, the driver's seat and the passenger seat are the main sources of voice information, so to realize the voice interaction between the driver and the vehicle, it is necessary to suppress the sound from the direction of the passenger. To address this requirement, it is generally necessary to use a beamforming (BF) tec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/0216H04R3/04
CPCG10L21/0216H04R3/04G10L2021/02166Y02D30/70
Inventor 杨晓霞刘溪
Owner 大众问问(北京)信息科技有限公司
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