Voice enhancement system and method for cellphone microphone

A voice enhancement and microphone technology, applied in voice analysis, instruments, etc.

Active Publication Date: 2016-04-20
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the speech signal processing system, the pitch and wave characteristics of speech are widely used in speech compression coding, speech analysis and synthesis, and speech recognition, but how to combine the pitch and wave characteristics of speech with the speech enhancement system There are still few, especially in the dual-microphone voice enhancement system for mobile phones

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  • Voice enhancement system and method for cellphone microphone
  • Voice enhancement system and method for cellphone microphone
  • Voice enhancement system and method for cellphone microphone

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Embodiment Construction

[0045] The present invention will be further described in detail below in conjunction with the examples, which are not intended to limit the present invention.

[0046] figure 1 The voice enhancement 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 elimination device. 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 main microphone digital noisy voice signal, and the digital noisy voice signal is passed to the voice and noise activity detection device and the noise canceling device; 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 microphone into a di...

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Abstract

The invention discloses a voice enhancement system and method for a cellphone microphone, and the method comprises the steps: firstly carrying out the time domain noise reduction processing of noise voice signals of a main microphone and an auxiliary microphone; secondly filtering out the linear related noises between the main microphone and the auxiliary microphone; thirdly converting the signals after time domain noise reduction to a frequency domain for frequency domain noise reduction, thereby further filtering the linear uncorrelated noises between the main microphone and the auxiliary microphone. The method determines a voice frequency point and a noise frequency point in the frequency domain through employing the reference sound of voice and a harmonic structure, adjusts the parameters of a frequency domain wiener filter for the voice and noise frequency points, retains the voice frequency point while enabling the wiener filter to precisely filter the noise frequency point, achieves the reduction of voice distortion, and improves the call quality of a cellphone.

Description

technical field [0001] The invention relates to the field of noise suppression and elimination in mobile phone calls, in particular to a voice enhancement system and a voice enhancement method for a microphone of a mobile phone. Background technique [0002] Speech is the sound made by human beings. This is a special sound. Air enters the throat from the lungs through the trachea, then enters the vocal tract through the vocal cords, and finally radiates sound waves from the mouth, forming speech. The throat contains important vocal organs ——Vocal cords, the vocal cords provide the main excitation source for speech production, the opening and closing time of the vocal cords each time is the vibration period of the vocal cords, and its reciprocal is called the pitch frequency, referred to as the fundamental tone, when a person makes a voiced sound, the vibration of the vocal cords produces a band A waveform that is periodic in nature and carries most of the energy of speech. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/0224G10L21/0232
CPCG10L21/0224G10L21/0232
Inventor 章雒霏张铭李晨
Owner NANJING NORMAL UNIVERSITY
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