|Table of Contents|

Complex plane spectral subtraction for speech enhancement in complicated environments

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

Issue:
2013年06期
Page:
857-862
Research Field:
Publishing date:

Info

Title:
Complex plane spectral subtraction for speech enhancement in complicated environments
Author(s):
Wang Shuiping123Tang Zhenmin3Chen Beijing12Jiang Ye3
1.School of Computer and Software;
2.Jiangsu Engineering Center of Network Monitoring,Nanjing University of Information Science and Technology,Nanjing 210044,China;
3.School of Computer Science and Engineering,NUST,Nanjing 210094,China
Keywords:
complicated environments speech enhancement complex plane spectral subtraction gain function
PACS:
TN912.35
DOI:
-
Abstract:
To reduce noise in complicated environments and eliminate the inferences of noise on the applications of speech recognition and speaker recognition systems in automatic military command and control fields,a new spectral subtraction is designed.Aiming at the incorrect assumption of the traditional spectral subtraction that the phase difference between the clean speech and noise signals is zero in the speech enhancement process,an improved spectral subtraction is proposed based on complex plane and considering the phase difference among the clean speech,the noise and the noisy speech signals.The gain function is corrected.The results of complicated battlefield simulation experiments show that the method proposed here performs better than the traditional spectral subtraction,especially in low signal noise ratio(SNR)conditions.For the noisy speech with input SNR of 5 dB,the output SNR is more than 12.21 dB after denoised by using the complex plane spectral subtraction,which increases 2.1 dB than the result of the traditional spectral subtraction.

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Last Update: 2013-12-31