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Self-adaption spectral subtraction and noise elimination processing method and device for voice signals

A speech signal, adaptive technology, applied in speech analysis, instruments, etc., to solve the problem of background noise

Inactive Publication Date: 2014-12-10
HUADI COMP GROUP
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0008] As can be seen from the technical solutions provided by the above-mentioned embodiments of the present invention, the embodiments of the present invention establish an additive model of the speech signal, and obtain the The estimated value of the power of the voice signal, and then according to the estimated power of the voice signal, the noise-eliminated voice signal is obtained, which effectively solves the background noise problem of the voice signal in the conference call, and does not bring other "music noises". " and other noise

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Embodiment 1

[0016] A schematic structural diagram of a voice resource processing and switching service platform provided by an embodiment of the present invention is as follows figure 1 As shown, the platform mainly completes functions such as voice enhancement, transcoding of audio media streams, multi-channel audio mixing, recording, playback, and echo cancellation. The platform has the code stream forwarding function, which can forward the front-end audio stream to the dispatching console and storage device; it has powerful streaming media processing capabilities, and a single unit supports 1440 channels of voice non-blocking scheduling and forwarding processing, and a single conference supports 480 parties sound.

[0017] The above-mentioned I / O board in the voice resource processing and switching service platform: mainly realizes the external connection between the switch and the hardware platform, and at the same time, uses the pins of the front and rear boards to realize the trunk ...

Embodiment 2

[0059] This embodiment provides a device for performing adaptive spectrum reduction and noise reduction processing on speech signals, and its specific structure is as follows: Figure 4 As shown, the following modules are included:

[0060] The additive model acquisition module 41 of speech signal is used for setting up the additive model of speech signal according to band noise signal, noise signal and speech signal;

[0061] The power estimation value acquisition module 42 of speech signal, is used for calculating the power spectrum of the additive model of described speech signal, obtains according to the power spectrum of the additive model of described speech signal and the power estimation value of band noise signal, noise signal an estimate of the power of the speech signal;

[0062] The denoising speech signal acquisition module 43 is configured to perform an inverse Fourier transform on the estimated power value of the speech signal to obtain a speech signal with noi...

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Abstract

An embodiment of the invention provides a self-adaption spectral subtraction and noise elimination processing method and device for voice signals. The method mainly comprises establishing an additive model of the voice signals according to signals with noise, noise signals and voice signals; calculating a power spectrum of the additive model of the voice signals and obtaining a power estimation value of the voice signals according to the power spectrum of the additive model of the voice signals and power estimation values of the signals with noise and the noise signals; performing inverse Fourier transformation on the power estimation value of the voice signals and obtaining the voice signals with noise being removed. The self-adaption spectral subtraction and noise elimination processing method for the voice signals effectively solves the background noise problem of the voice signals in a teleconference and not causes other noise such as musical noise.

Description

technical field [0001] The invention relates to the technical field of speech signal processing, in particular to a method and device for performing adaptive spectrum reduction and noise reduction processing on speech signals. Background technique [0002] In large-scale enterprises in my country's armed police, public security, railway, electric power, petroleum and petrochemical industries, production scheduling meetings are often held, and a large-capacity fully interactive conference call system is required. In these teleconferencing systems, there are a large number of heterogeneous voice resource terminals, and these heterogeneous voice resource terminals need to communicate with each other through conversion equipment, such as analog terminals in public communication networks, digital trunking systems, satellite networks and cable networks ( Telephones) realize intercommunication through program-controlled switches; VoIP voice telephone terminals realize intercommunic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/0216
Inventor 张金明刘宇
Owner HUADI COMP GROUP
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