A signal processing method, device, equipment and storage medium

A signal processing and signal technology, applied in image communication, speech analysis, instruments, etc., can solve problems such as poor transient noise suppression effect, high computational complexity, and affecting audio quality, so as to improve quality, low computational complexity, The effect of eliminating transient noise

Active Publication Date: 2022-06-14
南京大鱼半导体有限公司
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Problems solved by technology

[0003] The presence of transient noise seriously affects audio quality
At present, noise suppression algorithms such as spectral subtraction, Wiener filtering, and adaptive filtering mostly only suppress steady-state noise. Since most transient noises completely overlap with the original signal in the frequency domain, these algorithms are less effective in suppressing transient noises; At the same time, some existing transient noise suppression methods include median filtering, Bayesian framework and other noise suppression algorithms, which also have many defects. Good, but high computational complexity

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  • A signal processing method, device, equipment and storage medium
  • A signal processing method, device, equipment and storage medium
  • A signal processing method, device, equipment and storage medium

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Embodiment Construction

[0033] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.

[0034] It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0035] The inventors of the present application have noticed that the open-source algorithm based on WebRTC (Web Real-Time Communication) noise suppression eliminates the noise in the speech signal. This algorithm can effectively suppress steady-state noise, but has little effect on transient noise suppression. good. The transient noise energy is usually conc...

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Abstract

The present application provides a signal processing method, device, equipment and storage medium, which relate to the technical field of digital signal processing. The method includes: preprocessing the input signal to obtain a transient noise discrimination signal; The transient noise after the amplitude; the time-domain replacement processing is performed on the impulse noise of the transient noise discrimination signal to obtain the first transient noise elimination signal; the short-term pulse noise in the first transient noise elimination signal Perform time domain clipping processing to obtain a second transient noise elimination signal; and perform frequency domain coherence suppression on the second transient noise elimination signal to obtain a target signal. After the input signal is preprocessed, replaced, and limited in the time domain, it is transformed into the frequency domain for further suppression based on coherence, thereby greatly eliminating the two types of transient noise in the input signal, with low complexity and guaranteed Smaller degree of distortion of the target signal.

Description

technical field [0001] The present application relates to the technical field of digital signal processing, and in particular, to a signal processing method, apparatus, device, and storage medium. Background technique [0002] The transient noise in speech and video signals is discontinuous, intermittent and impulsive in the time domain, and its noise energy is mainly concentrated in a short time domain interval, but widely distributed in the frequency domain. Because transient noise usually has the characteristics of suddenness and impulse, it can be specifically divided into impulse noise and short-term impulse noise; typical transient noises such as table tapping, applause, keyboard keystroke, The sound of mouse buttons, hammer hitting, etc., they often appear in voice communication terminal equipment such as hearing aids, mobile phones, and video conferencing equipment. [0003] The presence of transient noise seriously affects audio quality. At present, most noise sup...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L21/0208H04M9/08H04L65/80H04N5/21
Inventor 顾天池朱凌王娜
Owner 南京大鱼半导体有限公司
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