Noise elimination system and method of mobile phone microphones

A microphone and main microphone technology, which is applied in the field of mobile phone microphone noise cancellation system, can solve the problems of misjudgment performance and degradation, and achieve the effect of reducing performance degradation

Active Publication Date: 2016-01-20
NANJING NORMAL UNIVERSITY
View PDF7 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a dual-microphone noise canceling system and a noise canceling method for a mobile phone. The noise canceling system uses a voice and noise activity detection module to detect voice and noise respectively, and uses In order to perfor...

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
  • Noise elimination system and method of mobile phone microphones
  • Noise elimination system and method of mobile phone microphones
  • Noise elimination system and method of mobile phone microphones

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0042] The present invention will be further described in detail below in conjunction with the examples, which are not intended to limit the present invention.

[0043] figure 1 The noise cancellation system of the mobile phone microphone in the mobile phone includes: a first analog-to-digital conversion module, a second analog-to-digital conversion module, a voice and noise activity detection device, and a noise cancellation module. The first analog-to-digital conversion module is connected to the main microphone on the mobile phone, and the main The analog noisy voice signal received by the microphone is converted into the digital noisy voice signal of the main microphone, and the digital noisy voice signal is passed to the voice and noise activity detection device and the noise elimination module; the second analog-to-digital conversion module is connected to the mobile phone The secondary microphone converts the analog noisy voice signal received by the secondary microphon...

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 invention discloses a noise elimination system and method of mobile phone microphones. A voice and noise activity detection device and a noise elimination module are utilized for performing noise elimination treatment on a noisy voice signal received by the main microphone and the secondary microphone of a mobile phone, and the problems that because an existing double-channel voice activity detection device depends on a fixed threshold value, voice and noise can not be accurately distinguished in a complex noise environment, and if the existing double-channel voice activity detection device is applied to a mobile phone noise elimination system, voice distorts, and speech intelligibility is lowered are solved. The situation that because the voice activity detection device makes a wrong judgment, the performance of the noise elimination system is lowered is reduced, the noise elimination system can perform accurate noise reduction on the noisy voice signal received by the microphones, and the quality of mobile phone communication is improved.

Description

technical field [0001] The invention relates to the field of noise suppression and elimination in mobile phone calls, in particular to a noise elimination system and a noise elimination method for a microphone of a mobile phone. Background technique [0002] Voice activity detection is an important part of speech enhancement processing. Voice activity detection can determine the location of the start and end points of speech from noisy speech signals. Accurately distinguishing speech and noise can help the noise canceling system perform different processing for speech and noise, reducing speech distortion while suppressing noise. The existing voice activity detection technology used in mobile phone noise cancellation mainly judges voice and noise by setting a fixed threshold. However, the noise environment in which a mobile phone is in a call is very complicated, and the fixed threshold cannot The noise ratio and the accurate distinction between voice and noise in a noisy e...

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
IPC IPC(8): G10L15/16G10K11/16H04M1/03
Inventor 章雒霏张铭李晨
Owner NANJING NORMAL 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