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A super-directional beamforming method and device

A super-directional beam, rotating device technology, applied in the direction of the microphone port/microphone accessories, etc., can solve the problem of poor directivity of the super-directional beam, and achieve the effect of improving the directivity, enhancing the voice, and suppressing the noise.

Active Publication Date: 2020-08-18
西安讯飞超脑信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing super-directivity beamforming algorithm generally assumes that the microphone array is in an ideal scattering noise field, but usually, the microphone array is not in a scattering noise field, so the super-directivity designed according to the scattering noise field Poor beam directivity

Method used

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  • A super-directional beamforming method and device
  • A super-directional beamforming method and device
  • A super-directional beamforming method and device

Examples

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no. 1 example

[0068] The acoustic response measurement system provided by the embodiment of the present application is introduced below.

[0069] see figure 2 , is a schematic structural diagram of the acoustic response measurement system provided in the embodiment of the present application. The measurement system 200 includes: a rotatable device 201 , a slide rail 202 , and a loudspeaker device 203 connected to the slide rail 202 through a connecting piece.

[0070] In this embodiment, the rotatable device 201 in the measurement system 200 can drive the microphone device to rotate, therefore, the measurement system 200 can be used to measure the acoustic response of the microphone array of the microphone device, and during the measurement, the The microphone device to be tested is placed on the rotatable device 201. For each microphone on the microphone device, by controlling the rotatable device 201 to rotate and controlling the speaker device 203 to slide on the slide rail 202, the mi...

no. 2 example

[0092] Next, the super-directional beamforming method provided by the embodiment of the present application is introduced.

[0093] see image 3 , which is a schematic flowchart of a super-directional beamforming method provided in this embodiment, the method includes the following steps:

[0094] S301: Based on the pre-built acoustic response measurement system, record the sound signals received by the microphone array of the microphone device under different sound incident angles.

[0095] Wherein, the pre-built acoustic response measurement system may be the acoustic response measurement system 200 provided in the first embodiment above. Based on this, the microphone device can be placed on the rotatable device 201 to use the acoustic response measurement system 200 to record the sound signals received by the microphone array of the microphone device under different sound incident angles.

[0096] It should be noted that sound is produced by the vibration of objects and p...

no. 3 example

[0145] This embodiment will introduce a super-directional beamforming device, and for related content, please refer to the foregoing method embodiments.

[0146] see Figure 7 , which is a schematic diagram of the composition of a super-directional beamforming device provided in an embodiment of the present application. The device 700 includes:

[0147] The sound recording unit 701 is used to record sound signals received by the microphone array of the microphone device under different sound incident angles based on a pre-built acoustic response measurement system, wherein the acoustic response measurement system includes a rotatable device, a sliding rail, and A loudspeaker device connected to the slide rail through a connecting piece

[0148] The beam forming unit 702 is configured to form super-directional beams according to the sound signals received under the different sound incident angles.

[0149] In an implementation manner of this embodiment, the rotatable device i...

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Abstract

The present application discloses a super-directional beamforming method and apparatus, which requires pre-establishing an acoustic response measuring system. The acoustic response measuring system includes a rotatable apparatus, a slide rail, and a speaker device connected to the slide rail by using a connection member. To form a super-directional beam, a sound signal received by a microphone array of a microphone device at different sound incident angles may be recorded based on the acoustic response measuring system, and the super-directional beam is formed according to the sound signal received at the different sound incident angles. The sound signal collected by the acoustic response measuring system of the present application belongs to sampling information of an actual noise field,and when the super-directional beam is formed by using the sampling information of the actual noise field, directionality of the super-directional beam can be improved, so that speech in a target areacan be effectively enhanced and noise in a non-target area can be suppressed by using the super-directional beam.

Description

technical field [0001] The present application relates to the technical field of microphone arrays, and in particular to a super-directional beamforming method and device. Background technique [0002] With the rapid development of information technology, more and more intelligent interactive products are coming out. Voice, as the most natural and convenient way to interact with human information, is the most mainstream interactive way for intelligent interactive products today. In existing relatively common intelligent interactive products, a microphone array is generally used for noise reduction and reverberation. [0003] In the microphone array algorithm, the super-directional beamforming can realize a pickup beam in the target direction, which is used to enhance the voice in the target area and suppress the noise in the non-target area. The existing super-directivity beamforming algorithm generally assumes that the microphone array is in an ideal scattering noise field...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R1/08
CPCH04R1/08
Inventor 徐东阳黄磊王海坤马峰
Owner 西安讯飞超脑信息科技有限公司