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A method and device for noise reduction

A device and sound technology, applied in branch equipment, microphones, voice analysis, etc., can solve problems such as poor collection effect, and achieve the effect of reducing interference and excellent effect.

Active Publication Date: 2021-04-13
QINGDAO HISENSE MOBILE COMM TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a method and device for sound noise reduction, which is used to solve the problem in the prior art that if there are various noise speakers outside the terminal when collecting sound, these noises will be collected together, resulting in a relatively poor collection effect.

Method used

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  • A method and device for noise reduction

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Embodiment Construction

[0029] Such as figure 1 As shown, a schematic diagram of multiple audio paths in the embodiment of the present invention:

[0030] figure 1 It can be seen from the figure that one audio channel is occupied by intercom, one audio channel is occupied by recording, one audio channel is occupied by video recording, and one audio channel is occupied by incoming call ringtone; and intercom, video recording and recording are audio channels connected to the microphone, which are defined as the first audio channel , the incoming ringtone is the audio channel connected to the speaker, which is defined as the second audio channel; in this way, different audio channels can be assigned to different applications, so as to realize simultaneous intercom, recording, video and other functions.

[0031] The terminal contains at least one MIC (Microphone, microphone), CODEC (codec) processes the audio data received by the MIC and transmits it to DSP (Digital Signal Processing, digital signal pro...

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Abstract

The invention discloses a method and device for sound noise reduction, which is used to solve the problem in the prior art that if there are multiple noises outside the speaker when the terminal is collecting sounds, these noises will be collected together, resulting in a poor collection effect. question. In the embodiment of the present invention, when the terminal determines that there is an application occupying the first audio channel and an application occupying the second audio channel, the terminal performs DSP processing on the audio data on the second audio channel according to the sampling rate of the first audio data. Resampling, and then sending the resampled audio data and the audio data of the first audio channel to the DSP for noise reduction processing. Since the terminal performs noise reduction processing according to the audio data of the first audio channel and the audio data of the second audio channel through the DSP, the interference caused by the audio data of the second audio channel to the audio data of the first audio channel can be eliminated or reduced, so that The effect of the sound collected by the terminal is superior.

Description

technical field [0001] The invention relates to the technical field of audio processing, in particular to a method and device for noise reduction of sound. Background technique [0002] Noise is the frequency of sound waves, irregular and chaotic sounds; from a physiological point of view: all sounds that hinder people's normal rest, study and work, and sounds that interfere with the sounds that people want to listen to belong to noise; in this sense Generally speaking, there are many sources of noise. For example, the sound of cars on the street, the sound of talking in a quiet library, the sound of machines on a construction site, and the loud sound of a neighbor's TV are all noise. [0003] Generally, people use decibels (dB) to measure the strength of noise, and signal-to-noise ratio (S / N) to measure the influence of noise on useful signals. Possible sources of noise are airplanes, cars, factories, construction sites, daily life, etc. [0004] With the development of s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L21/0216H04M1/19H04M1/72403H04M1/72454
CPCH04M1/19G10L21/0216H04M1/72403H04M1/72454G10L21/0208H04R2410/05
Inventor 郑伟波耿炳钰
Owner QINGDAO HISENSE MOBILE COMM TECH CO LTD
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