Noise suppression method, device and system

A technology for noise suppression and internal noise, used in interconnection devices, active noise control, sounding equipment, etc., and can solve problems such as poor performance

Active Publication Date: 2015-09-30
GRG BAKING EQUIP CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The embodiment of the present invention provides a noise suppression method, device and system, which solves the technical problem of poor performance caused by the ANC method due to the large difference in the sound field environment between the reference microphone and the main microphone.

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  • Noise suppression method, device and system

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Embodiment Construction

[0058] Embodiments of the present invention provide a noise suppression method, device and system, which solve the current technical problem of poor performance when using the ANC method due to the large difference in the sound field environment between the reference microphone and the main microphone.

[0059] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the following The described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0060] see figure 1 , an embodime...

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Abstract

An embodiment of the invention discloses a noise suppression method, device and system, and solves the technical problem of poor performance of an ANC (automatic noise canceller) method due to large difference between sound field environments of a reference microphone and a main microphone at present. The noise suppression method includes the steps: S1, receiving internal noise acquired by a reference voice acquisition mechanism and voice signals containing external noise acquired by a main voice acquisition mechanism by a noise suppression device when the voice signals are inputted; S2, extracting internal signal characteristics corresponding to the internal noise; S3, acquiring external approximate characteristics corresponding to the external noise according to the internal signal characteristics and a preset mapping formula; S4, converting the external approximate characteristics into corresponding noise signal estimation values by Fourier inverse transform; S5, processing the voice signals containing internal noise estimated and acquired by noise signals in a preset noise cancellation mode to obtain denoised voice signals after noise suppression.

Description

technical field [0001] The invention relates to the technical field of speech signal processing, in particular to a noise suppression method, device and system. Background technique [0002] There are often many mechanical parts in devices with voice interaction functions, and these mechanical parts generate a large number of rapidly changing non-stationary machine noises and impact noises when they are working. These noises enter the system through the pickup on the device, which will seriously affect the effect of voice interaction. The traditional noise suppression method based on noise power spectrum estimation has a very poor filtering effect on this fast-changing non-stationary machine noise and impact noise. In existing inventions, a dual-microphone noise reduction device is often used to filter out environmental noise. There is a main microphone in the device for receiving ambient noise and speech, and a reference microphone for receiving ambient noise, and then th...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/0208
CPCH04R3/00G10L21/0208G10L21/0216H04M9/082G10L25/30G10K11/17821G10K2210/3038G10L21/0232G10L25/21
Inventor 杜高峰梁添才刘建平金晓峰
Owner GRG BAKING EQUIP CO LTD
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