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An orientation method for human voice detection based on microphone array board

A technology of microphone array and human voice, applied in the direction of direction determination device, direction finder using ultrasonic/sonic/infrasonic wave, measuring device, etc. The effect of simple calculation and high use value

Active Publication Date: 2021-11-09
西安合谱声学科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a microphone array-based voice detection and orientation method to solve the problems of inaccurate voice recognition and insufficient camera focus in the prior art conference system

Method used

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  • An orientation method for human voice detection based on microphone array board
  • An orientation method for human voice detection based on microphone array board
  • An orientation method for human voice detection based on microphone array board

Examples

Experimental program
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Embodiment 1

[0046] like figure 1 and figure 2 As shown, a microphone array-based human voice detection and orientation method is disclosed in this embodiment, comprising the following steps:

[0047] Step 1: Use the microphone array to obtain the audio signal at the sound source;

[0048] Step 2: Carry out angle calculation and vocal judgment on the audio signal obtained in step 1 frame by frame, mark each frame as a noise signal or a speech signal according to the judgment result, and output the frame and the angle judged to be a speech signal, until the audio signal The last frame judgment ends and the detection is completed;

[0049] Among them, the human voice judgment of each frame in the audio signal is performed according to the following steps:

[0050] Step 2.1: Obtain the current frame of the audio signal, and use the DOA algorithm to calculate the angle at which the current frame is located;

[0051] Step 2.2: Calculate various attribute values ​​of the current frame, the ...

Embodiment 2

[0079] In this embodiment, a microphone array-based human voice detection method is disclosed. On the basis of Embodiment 1, the application of the microphone array-based human voice detection method in a video conferencing system is disclosed. At the same time, the microphone array can be The board is placed in any smart device that needs to locate human voices, such as the application scenarios of education recording and broadcasting systems, the application scenarios of interrogation systems, etc.

[0080] In this embodiment, the vocal detection method based on the microphone array is mainly used to detect whether the angle of each frame in the current audio in the meeting site is the angle of the human voice. If it is judged to be the human voice, the angle is passed to the camera to drive the camera Horizontal movement, through face recognition technology to achieve automatic focus on the speaker.

[0081] like image 3 As shown, the horizontal axis is the number of samp...

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Abstract

The invention belongs to the technical field of acoustic signal processing, and discloses a microphone array-based human voice detection and orientation method, comprising the following steps: Step 1: using a microphone array to obtain an audio signal at a sound source; Step 2: using the audio signal obtained in Step 1 The signal performs angle calculation and vocal judgment frame by frame. According to the judgment result, each frame is marked as a noise signal or a voice signal, and the frame and angle judged to be a voice signal are output until the last frame of the audio signal is judged and the detection is completed. The present invention achieves recognition of speech signals with relatively large energy with a relatively small amount of calculation data. It can also effectively filter out typical conference room noises such as clapping tables, clapping hands, and flipping books, and has high use value.

Description

technical field [0001] The invention belongs to the technical field of acoustic signal processing, and in particular relates to a microphone array-based human voice detection and orientation method. Background technique [0002] With the development of electronic information technology and acoustic technology, sound source directional technology based on microphone array is more and more applied to various products, for example: video conferencing system is accompanied by the development of intelligence, in people's daily life, It is becoming more and more popular in study and work. [0003] In a general video conferencing system, it is often necessary to record the audio and video of the meeting scene in real time, and it is required to quickly identify the speaker and focus the camera on the speaker quickly. At present, the focus of the camera generally needs to be realized manually by the user, resulting in untimely video switching, low focus accuracy, and troublesome op...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L21/0208G10L21/0216G10L25/60G10L25/84G01S3/808
CPCG01S3/8083G10L21/0208G10L21/0216G10L25/60G10L25/84G10L2021/02087G10L2021/02166H04R2430/20
Inventor 黄绍锋孙雅蓉张升辉刘晓霞靳冠军
Owner 西安合谱声学科技有限公司