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Denoising method and device based on noise estimation

A noise estimation and noise technology, applied in the field of denoising methods and devices based on noise estimation, can solve problems such as speech distortion, achieve the effect of reducing the loss of clarity and improving the processing effect

Active Publication Date: 2014-02-12
ZTE CORP
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Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a denoising method and device based on noise estimation to solve the problem that speech distortion is easily generated after non-stationary noise denoising processing

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  • Denoising method and device based on noise estimation
  • Denoising method and device based on noise estimation

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Embodiment Construction

[0034] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0035] like figure 1 As shown, the embodiment of the denoising method based on noise estimation of the present invention includes:

[0036] Step 101: the noise sample update step, detects the voice start point (also called the voice end point) of the signal to be processed, and updates the M frame signal before the voice start point to be the noise signal of the noise sample, and the signal after the voice start point is called is a noisy speech signal;

[0037] Generally, before detecting the starting point of speech, preprocessing such as framing and windowing needs to be performed on the speech signal to be processed.

[0038] At present, there are many methods for detecting the start...

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Abstract

The invention relates to a denoising method and device based on noise estimation. The denoising method comprises a noise sample updating step, a denoising processing step and a judging step. In the noise sample updating step, a voice starting point of a signal to be processed is detected, M frames of signals before the voice starting point are updated into noise signals of a noise sample, and signals after the voice starting point are called voice signals with noise. In the denoising processing step, L frames of voice signals with noise to be processed are subjected to denoising processing according to the noise sample. In the judging step, whether the amplitudes of N frames of signals to be processed later are all smaller than a preset threshold is judged, the noise sample updating step is executed if the amplitudes are smaller than the preset threshold, and the denoising processing step is executed otherwise. By means of the denoising method and device based on noise estimation, unstable noise signals can be better tracked.

Description

technical field [0001] The invention relates to the field of communication, in particular to a method and device for denoising based on noise estimation. Background technique [0002] In real life, speech or signals are often interfered by background noise, especially in some public places such as stations, squares, streets, etc. These non-stationary strong noises have a great impact on call quality and speech intelligibility, while traditional speech enhancement algorithms usually only have good effects on stationary or slow-changing noises, and lose speech while suppressing noise clarity. Therefore, we need to find a method that can track non-stationary noise quickly and accurately. [0003] In order to strengthen the tracking and estimation of background noise, the existing technology has the following methods: [0004] The first is to use traditional filters to denoise the speech signal. Including Wiener filter, adaptive filter, etc., the minimum mean square error is...

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Application Information

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IPC IPC(8): G10L21/0216
Inventor 张刚王进军孙焘薛涛刘冬梅
Owner ZTE CORP
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