一种近场环境下的麦克风阵列语音增强方法
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摘要
针对语音源位于阵列近场而干扰噪声源位于阵列远场的声学环境,本文提出了一种基于近场双自适应波束形成的麦克风阵列语音增强方法。该方法利用近场声波波前的特点,主通道采用最小方差无失真响应准则的近场优化波束形成器,辅助通道采用双自适应波束形成技术,从而有效地抑制了混响和噪声对语音信号的影响。仿真实验结果表明,在房间混响条件下,本文方法具有良好的噪声抑制性能。
Considering the acoustical environment where a desired speech source locates in the near field of the array and other interference sources locate in the far field of the array,a new near-field double adaptive beamforming method for microphone array speech enhancement is introduced in the paper.It takes full advantage of spherical nature of the sound wavefront in the minimum vari- ance distortionaless response(MVDR)beamformer.By using the optimal near-field beamformer based on MVDR the in the main chan- nel and double adaptive beamforming in the auxiliary channel,the proposed method attenuates the effects of reverberation and noise on the speech.Simulation results demonstrate that compared with other methods,the proposed microphone array speech enhancement meth- od exhibits the better noise reduction performance in a small room.
Considering the acoustical environment where a desired speech source locates in the near field of the array and other interference sources locate in the far field of the array,a new near-field double adaptive beamforming method for microphone array speech enhancement is introduced in the paper.It takes full advantage of spherical nature of the sound wavefront in the minimum vari- ance distortionaless response(MVDR)beamformer.By using the optimal near-field beamformer based on MVDR the in the main chan- nel and double adaptive beamforming in the auxiliary channel,the proposed method attenuates the effects of reverberation and noise on the speech.Simulation results demonstrate that compared with other methods,the proposed microphone array speech enhancement meth- od exhibits the better noise reduction performance in a small room.
引文
[1]L.J.Griffiths,C.W.Jim.An alternative approach to line- arly constrained adaptive beamforming.IEEE Transactions on Antennas and Propagation,1981;30(1):27-34.
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[4]O.Hoshuyama,A.Sugiyama,A.Hirano.A robust adap- tive beamformer for microphone arrays with a blocking ma- trix using constrained adaptive filters.IEEE Transactions on Signal Processing,1999;47(10):2677-2684.
[5]S.Gannot,I..Cohen.Speech enhancement based on the general transfer function GSC and postfiltering.IEEE Transactions on Speech and Audio Processing,2004;12 (6):561-571.
[6]Dongxia Wang,Fuliang Yin.A subband adaptive learning algorithm for microphone array based speech enhancement. Lecture Notes in Computer Science,Springer-Verlag Gm- bH,2005;3497:592-597.
[7]G.J.Ryan.Criterion for the minimum source distance at which plane-wave beamforming can be applied.Journal of the Acoustic Society of America,1998;104(1):595- 598.
[8]J.G.Ryan,R.A.Goubran.Array optimization applied in the near field of a microphone array.IEEE Transactions on Speech and Audio Processing,2000;8(2):173-176.
[9]J.G.Ryan,R.A.Goubran.Application of near field opti- mum microphone arrays to hands-free mobile telephony. IEEE Transactions on Vehicular Technulogy,2003;52 (2):390-400.
[10]Y.R.Zheng,R.A.Goubran,M.E1-Tanany.Experimen- tal evaluation of a nested microphone array with adaptive noise cancellers.IEEE Transactions on Instrumentation and Measurement,2004;53(3):777-786.
[11]杨善元,杨燕．波．北京:地震出版社,1988．
[12]D．G．Manolakis,V．K．Ingle,s．M．Kogon著．周正等译,统计与自适应信号处理．北京:电子工业出版社, 2003．
[13]S.L.Gay,S.Tavathia.The fast affine projection algo- rithm.IEEE International Conference on Acoustics, Speech,and Signal Processing,1995;3023-3026.
[14]K.H.Woo,T.Y.Yang,K.J.Park,et al.Robust voice activity detection algorithm for estimating noise spectrum, Electronics Letters,2000;20(36):180-181.
[15]F.Everest.The Master Hand of Acoustics 2nd ed.New York:McGraw-Hall.2001.
[16]J.B.Allen,D.A.Berkley.Image method for efficiently simulating small room acoustics.Journal of the Acoustic Society of America,1979;65:943-950.
[17]殷福亮,宋爱军．数字信号处理C语言程序集．沈阳:辽宁科学技术出版社,1997．
[2]R.Zelinski.A microphone array with adaptive post-filte- ring for noise reduction in reverberant rooms.IEEE Inter- national Conference on Acoustics,Speech,and Signal Pro- cessing,1988;5:2578-2581.
[3]F.Asano,S.Hayamizu.Speech enhancement using CSS -based array processing.IEEE International Conference on Acoustics,Speech,and Signal Processing,1997;2: 1191-1194.
[4]O.Hoshuyama,A.Sugiyama,A.Hirano.A robust adap- tive beamformer for microphone arrays with a blocking ma- trix using constrained adaptive filters.IEEE Transactions on Signal Processing,1999;47(10):2677-2684.
[5]S.Gannot,I..Cohen.Speech enhancement based on the general transfer function GSC and postfiltering.IEEE Transactions on Speech and Audio Processing,2004;12 (6):561-571.
[6]Dongxia Wang,Fuliang Yin.A subband adaptive learning algorithm for microphone array based speech enhancement. Lecture Notes in Computer Science,Springer-Verlag Gm- bH,2005;3497:592-597.
[7]G.J.Ryan.Criterion for the minimum source distance at which plane-wave beamforming can be applied.Journal of the Acoustic Society of America,1998;104(1):595- 598.
[8]J.G.Ryan,R.A.Goubran.Array optimization applied in the near field of a microphone array.IEEE Transactions on Speech and Audio Processing,2000;8(2):173-176.
[9]J.G.Ryan,R.A.Goubran.Application of near field opti- mum microphone arrays to hands-free mobile telephony. IEEE Transactions on Vehicular Technulogy,2003;52 (2):390-400.
[10]Y.R.Zheng,R.A.Goubran,M.E1-Tanany.Experimen- tal evaluation of a nested microphone array with adaptive noise cancellers.IEEE Transactions on Instrumentation and Measurement,2004;53(3):777-786.
[11]杨善元,杨燕．波．北京:地震出版社,1988．
[12]D．G．Manolakis,V．K．Ingle,s．M．Kogon著．周正等译,统计与自适应信号处理．北京:电子工业出版社, 2003．
[13]S.L.Gay,S.Tavathia.The fast affine projection algo- rithm.IEEE International Conference on Acoustics, Speech,and Signal Processing,1995;3023-3026.
[14]K.H.Woo,T.Y.Yang,K.J.Park,et al.Robust voice activity detection algorithm for estimating noise spectrum, Electronics Letters,2000;20(36):180-181.
[15]F.Everest.The Master Hand of Acoustics 2nd ed.New York:McGraw-Hall.2001.
[16]J.B.Allen,D.A.Berkley.Image method for efficiently simulating small room acoustics.Journal of the Acoustic Society of America,1979;65:943-950.
[17]殷福亮,宋爱军．数字信号处理C语言程序集．沈阳:辽宁科学技术出版社,1997．
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