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Spectral gain calculating method and device and noise suppression system

A computing method and technology of a computing device, which are applied in the field of communication, can solve the problems of high complexity of algorithms, which are not conducive to improving the working speed of a noise suppression system, and achieve the effects of reducing complexity, improving reliability and improving work efficiency.

Inactive Publication Date: 2010-03-17
LEADCORE TECH
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Problems solved by technology

The spectral gain calculation unit in the prior art adopts the method of Bessel function to calculate the spectral gain, and the complexity of the algorithm is high, which is not conducive to improving the working speed of the noise suppression system

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  • Spectral gain calculating method and device and noise suppression system
  • Spectral gain calculating method and device and noise suppression system
  • Spectral gain calculating method and device and noise suppression system

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Embodiment Construction

[0044] The specific implementation of the spectral gain calculation method, device and noise suppression system provided by the present invention will be described in detail below in conjunction with the accompanying drawings.

[0045] Firstly, a specific implementation manner of the spectral gain calculation method provided by the present invention is given in conjunction with the accompanying drawings.

[0046] attached figure 2 Shown is a flow chart of the implementation steps of the specific embodiment of the spectral gain calculation method provided by the present invention, including the following steps: Step S200, providing prior SNR information R of noisy speech prior and the posterior signal-to-noise ratio information R post ; Step S210, calculate the judgment parameter K according to the prior SNR information and the posterior SNR information; Step S220, set the threshold K of the judgment parameter 0 ; Step S230, the calculated judgment parameter K is the same as...

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Abstract

The invention relates to a spectral gain calculating method, which comprises the following steps: (a) providing prior signal-to-noise ratio information R prior and post signal-to-noise ratio information R post of noisy speech; (b) calculating a judgment parameter K according to the prior signal-to-noise ratio information R prior and the post signal-to-noise ratio information R post; (c) setting athreshold value of the judgment parameter K0; (d) comparing the judgment parameter K obtained by calculation with the threshold value K0, executing a step (e) when K is more than K0, and executing a step (f) if K is less than or equal to K0; (e) inserting the judgment parameter into an exponential function to calculate a spectral gain G; and (f) inserting the judgment parameter into a logarithmicfunction to calculate a spectral gain G. The invention also provides a spectral gain calculating device and a noise suppression device. The method has the advantage that: when a noise spectrum value exceeds an average value, the algorithm can avoid 'music noise' bursting locally, and reduces calculating complexity.

Description

【Technical field】 [0001] The invention relates to the technical field of communications, in particular to a calculation method and device for spectral gain and a noise suppression system. 【Background technique】 [0002] Speech signal is an important medium for human beings to disseminate information and communicate emotions. However, in the process of voice communication, it is inevitably subject to interference from the surrounding environment and even other speakers. These interferences eventually make the received voice signal not a pure original voice signal. Instead, it is a noisy speech signal contaminated by noise. During voice communication, noise is the main cause of making communication difficult. [0003] Noise Suppression (NS) technology can help reduce the adverse effects of noise. Its goal is to increase the signal-to-noise ratio (SNR) and thus speech intelligibility, reduce listener effort, and improve the perceived quality of the acoustic environment. The ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/02G10L21/0316
Inventor 谷志茹刘光军
Owner LEADCORE TECH