Non-air conduction speech reinforcement method based on multi-band spectrum subtraction

An air conduction and speech enhancement technology, applied in speech analysis, instruments, etc., can solve problems such as head movement, gestures, lip movement, heartbeat, breathing, affecting the quality of speech signals, and complex signal components when speaking, to achieve The effect of broad application prospects and market promotion value

Inactive Publication Date: 2008-12-10
FOURTH MILITARY MEDICAL UNIVERSITY
View PDF0 Cites 30 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such as head movement, gestures, lip movement, heartbeat, breathing, etc. when speaking; (b) the harmonics of radar waves, channel noise and additional noise of the voice detection system hardware itself; (c) interference from external environmental noise, The components of these noise signals are complex, the amplitude is stronger, and most of them are aliased with the spectrum of the speech signal, which seriously affects the quality of the speech signal.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Non-air conduction speech reinforcement method based on multi-band spectrum subtraction
  • Non-air conduction speech reinforcement method based on multi-band spectrum subtraction
  • Non-air conduction speech reinforcement method based on multi-band spectrum subtraction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0023] see figure 1 , the present invention at first will receive the radar non-air conduction voice signal to carry out digital processing and add window and do fast Fourier transform 1; Carry out voice segment and silent segment discrimination to the transformed signal, do multi-band segmentation 2 to the voice segment signal spectrum 3. Do noise estimation 3 to the signal without speech segment and extract the phase information 4 of the speech; do multi-band segmentation to the signal spectrum of the speech segment and use the adjustment coefficient δ of the i-th frequency band i It is weighted by 5; after the noise estimation of the non-speech segment signal, the oversubtraction factor α of the i-th frequency band is used i Weighting it 6; subtracting the weighted noise power spectrum estimated value 7 from the weighted noise power spectrum of the speech...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The present invention discloses a non-air conduction speech enhancement method based on a multi-band spectral subtraction. Because of the noise in the radar-based non-air conduction speech is always colored and no uniform influence on the speech signals within the whole range of the frequency spectrum, the method divides the speech frequency spectrum in a targeted manner into five sections without overlapping; simultaneously, each section is provided with an individual spectral subtraction coefficient, so as to achieve the effectiveness and pertinence of the algorithm. The embodiment proves the non-air conduction speech enhancement method can effectively compensate the weakness of low pertinence in the traditional speech enhancement method; moreover, the method has the advantages of highly efficient implementation, simple algorithm and obvious effect. Therefore, the method has higher practical value and application prospects.

Description

technical field [0001] The invention belongs to the technical field of voice signal detection and collection and voice enhancement, in particular to a non-air conduction voice enhancement method based on multi-band spectrum subtraction. Background technique [0002] Due to the essential difference in the detection principles and methods, the non-air conduction detection technology of voice essentially breaks through the fixed mode and limitations of traditional air conduction voice, and is also an effective supplement to the singleness of traditional detection methods. The non-air conduction voice detection technology can not only overcome the shortcomings and deficiencies of various voice detection modes (it enables people to get rid of the limitation that microphones must be placed near the sound source to detect voices at a longer distance, has strong anti-acoustic interference ability, and overcomes the Laser, infrared, ultrasonic and other detection technologies are vul...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/02
Inventor 李盛王健琪荆西京牛明
Owner FOURTH MILITARY MEDICAL UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap