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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2009, Vol. 10 Issue (6): 805-809    DOI: 10.1631/jzus.A0820390
Electrical & Electronic Engineering     
A noise cross PSD estimator for dual-microphone speech enhancement based on minimum statistics
Mohsen RAHMANI, Ahmad AKBARI, Beghdad AYAD, Nima DERAKHSHAN
Research Center for Information Technology, Computer Department, Iran University of Science and Technology, Tehran, Iran
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Abstract  Some two-microphone noise reduction techniques that work in the frequency domain exploit coherence function between two noisy signals. They have shown good results when noise signals on two sensors are uncorrelated, but their performance decreases with correlated noises. Coherence based methods can be improved when the cross power spectral density (CPSD) of correlated noise signals is available. In this paper, we propose a new method for estimation of the CPSD of the noise, which is based on the minimum tracking technique. Despite the fact that the proposed estimator does not need to implement a voice activity detector (VAD), its performance is comparable to a CPSD estimator that uses an ideal VAD.

Key words： Two-channel noise reduction      Noise estimation      Minima tracking     
Received: 22 May 2008     
CLC:  TN912  
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Mohsen RAHMANI
Ahmad AKBARI
Beghdad AYAD
Nima DERAKHSHAN
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Mohsen RAHMANI, Ahmad AKBARI, Beghdad AYAD, Nima DERAKHSHAN. A noise cross PSD estimator for dual-microphone speech enhancement based on minimum statistics. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2009, 10(6): 805-809.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.A0820390     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2009/V10/I6/805

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