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multiband spectral subtraction

About multiband spectral subtraction, I have a question.

  According to the literature of multiband spectral subtraction ,written by Sunil D. Kamath and Philipos C. Loizou ,  I conclude the idea of that article. Actually, it use the method of Berouti. It spilt frequency band into several subbands, apply the  method of berouti in per subband. And they also think it should have 4 subbands. More subbands are not necessary due  to trivial increase of speech quality.

  At the same time,they think the method of berouti is not  band-splited ,i.e ,only one subband.

  But I read the literature of Berouti. The method is actually  band-splited. But Berouti did not say it literally and  directly.  In a case of 256 points fft,it split 129 sub-bands. Berouti did everything other than use the term of multiband.


1. Enhancement of speech corrupted by acoustic noise
Berouti, M.  Schwartz, R.  Makhoul, J. 
Bolt Beranek and Newman, Inc., Cambridge, MA;

2. S. Kamath and P. Loizou. “A multi-band spectral subtraction method for enhancing speech corrupted by colored noise”,
  In Proceedings International Conference on Acoustics, Speech and Signal Processing, 2002


Any comments would be appreciated!
Cheers
HyeeWang@gmail.com

 
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