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Multi-channel audio noise reduction and output method and system

An audio and noise reduction technology, which is applied in the field of audio processing, can solve problems affecting the audio-visual quality of users on the receiving side, unbalanced audio noise, and different sound sources, so as to meet the needs of sound fullness and layering, and improve Speech recognition rate, the effect of improving sound quality

Active Publication Date: 2021-02-02
浙江蓝鸽科技有限公司
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Problems solved by technology

[0002] When performing remote recording and broadcasting video or remote video in classrooms, conference rooms, etc., usually only one pickup is set to collect the audio in the room. Different directions in the room are different from the pickup, which makes the sound source vary in distance, and the collected audio is often different. Balanced and noisy, making the sound quality of the output of the other receiving side poor, which will seriously affect the audio-visual quality of the user on the other receiving side, and cannot meet the audio-visual needs

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  • Multi-channel audio noise reduction and output method and system
  • Multi-channel audio noise reduction and output method and system

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[0056]In the following description, many technical details are proposed for the reader to better understand this application. However, those of ordinary skill in the art can understand that even without these technical details and various changes and modifications based on the following embodiments, the technical solution claimed in this application can be realized.

[0057]In order to make the objectives, technical solutions, and advantages of the present application clearer, the implementation manners of the present application will be described in further detail below in conjunction with the accompanying drawings.

[0058]The first embodiment of the present application relates to a noise reduction method for N channels of audio of N pickups in the room, wherein the N pickups are arranged in different directions in the room, and the N channels of audio are in one-to-one correspondence with the N pickups. The noise reduction method process is as followsfigure 1 As shown, the method inclu...

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Abstract

The invention relates to audio processing, and discloses a multi-channel audio noise reduction and output method and system, which can maintain the purity and completeness of finally output audio signals and improve the speech recognition rate. The noise reduction method comprises the following steps: acquiring N paths of audios, and segmenting each path of audio into a plurality of audio clips with time labels according to voice pause to obtain N audio clip sequences; determining a background noise segment in the audio clips, and calculating a frequency component of the background noise segment; for each audio clip with the same time label in the N audio clip sequences, selecting the audio clip with the optimal voice effect as a to-be-output audio clip, and calculating a frequency component of the to-be-output audio clip; and for each to-be-output audio clip, calculating a background noise frequency component estimated value according to the frequency component of the background noiseclip arranged in front of the to-be-output audio clip in the sequence, and subtracting the estimated value from the frequency component of the to-be-output audio clip so as to carry out noise reduction processing on the to-be-output audio clip.

Description

Technical field[0001]This application relates to audio processing, in particular to the noise reduction and output technology of multiple audio channels.Background technique[0002]When remote recording and broadcasting video or remote video in classrooms, meeting rooms and other places, usually only one pickup is set to collect indoor audio. The distance between the pickup and the pickup in different directions in the room is different, which makes the sound source different, and the collected audio is often different. Balanced and high noise makes the sound quality output by the other receiving side poor, which will seriously affect the audio-visual quality of users on the other receiving side, and cannot meet the audio-visual needs.Summary of the invention[0003]The purpose of this application is to provide a noise reduction, output method and system for N channels of audio of N pickups in the room, which can keep the final output audio signal pure and complete and improve the speec...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/0208G10L21/0216G10L21/0264G10L15/20G10L15/22G10L15/26H04N5/278
CPCG10L21/0208G10L21/0216G10L21/0264G10L15/20G10L15/22H04N5/278
Inventor 张新华陈华锋李兵
Owner 浙江蓝鸽科技有限公司
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