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Speech reconstruction-based instantaneous noise suppressing method

A transient noise and speech technology, applied in the field of transient noise suppression based on speech reconstruction, can solve the problems of transient noise being abnormally sensitive, not universally applicable, and unable to completely eliminate transient noise.

Active Publication Date: 2015-05-06
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI +1
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Problems solved by technology

However, this kind of method has time delay and noise residue, and is only suitable for some types of transient noise, so it is not universally applicable in real-time voice communication system applications, and due to the auditory characteristics of the human ear, it is abnormal for residual transient noise. Sensitive, none of the existing methods can completely eliminate transient noise

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  • Speech reconstruction-based instantaneous noise suppressing method
  • Speech reconstruction-based instantaneous noise suppressing method
  • Speech reconstruction-based instantaneous noise suppressing method

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Embodiment Construction

[0078] The embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings, but the present embodiments are not intended to limit the present invention, and any similar structures and similar changes of the present invention should be included in the protection scope of the present invention.

[0079] like figure 1 As shown, a kind of transient noise suppression method based on speech reconstruction provided by the embodiment of the present invention is characterized in that the specific steps are as follows:

[0080] 1) Use the microphone to pick up the acoustic signal, and preprocess the acoustic signal picked up by the microphone, ignoring the stationary noise residue d s (n), the preprocessed acoustic signal is:

[0081] x(n)=s(n)+d t (n);

[0082] Among them, x(n) is the preprocessed acoustic signal, s(n) is the target speech component in the preprocessed acoustic signal, d t (n) is the transient noise compo...

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Abstract

A speech reconstruction-based instantaneous noise suppressing method relates to the technical field of audio processing and solves the technical problem of instantaneous noise suppression. The speech reconstruction-based instantaneous noise suppressing method eliminates influence of instantaneous noise through instantaneous noise detection and instantaneous suppression and comprises, firstly, eliminating steady-state noise inside signals through traditional methods, and based on the different distribution characteristics of white voice noise signals and instantaneous noise signals, detecting instantaneous noise; secondly, after the instantaneous noise is detected, proposing a speech reconstruction-based algorithm to suppress the instantaneous noise, discarding frames containing the instantaneous signals, performing waveform reconstruction through uninterrupted signals adjacent in tandem to replace original signals. Therefore, the instantaneous noise can be completely eliminated under the condition without obvious speech distortion. The speech reconstruction-based instantaneous noise suppressing method is applicable to processing speech signals containing the instantaneous noise.

Description

technical field [0001] The invention relates to audio processing technology, in particular to the technology of a transient noise suppression method based on speech reconstruction. Background technique [0002] In voice communication terminal equipment such as mobile phones, hearing aids, and hands-free phones, transient noises such as keyboard sounds, mouse sounds, and knocking sounds will seriously affect voice quality and audio quality, so corresponding detection and suppression must be carried out. Transient noise is a kind of additive noise, which belongs to strong non-stationary noise. Typical transient noise is a burst signal, accompanied by a decaying oscillation process with a duration of 10-50ms. Due to its wide frequency band, There is a lot of overlap with the speech signal in the time-frequency domain, and it has the characteristics of discontinuity. Therefore, the traditional single-channel and multi-channel speech enhancement methods cannot suppress the transi...

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Application Information

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IPC IPC(8): G10L21/0308
Inventor 厉剑郑成诗李晓东杨鹤飞
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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