Re: Phd copy request (Weintraub 1985) (Ramin Pichevar )

Subject: Re: Phd copy request (Weintraub 1985)
From:    Ramin Pichevar  <Ramin.Pichevar@xxxxxxxx>
Date:    Fri, 31 Oct 2008 17:35:20 -0400

Hi Marc, Unfortunately, I don't have any copy of Weintraub's Ph.D. However, I think you can order it from Stanford Library. Anyway, the resynthesis you are talking about is straightforward. Since the gammatone filterbank used by Guy Brown and Martin Cooke is Infinite Impulse Response (IIR) , the phase delay introduced in each channel is different and not the same over the filterbank. Therefore, to compensate for those delays, you need to invert the signals from the synthesis stage or equivalently invert the gammatone filters (more specifically their impulse response) at the resynthesis stage so that the phase delays cancel out. You should then re-invert the reconstructed signal to regenerate the sound in the correct sequence. Hope this can help. Regards, Ramin ************************************************************************** Ramin Pichevar, Ph.D. Research Scientist | Chercheur scientifique Advanced Audio Systems Lab | Lab. de systèmes audio de pointe Communications Research Centre Canada | Centre de recherches sur les communications Canada 3701 Carling Ave. | 3701, avenue Carling PO Box 11490, Station H | CP 11490, succursale H Ottawa ON K2H 8S2 | Ottawa (Ontario) K2H 8S2 Tel: (613) 949-6451 | Fax: (613) 993-9950 | Ramin.Pishehvar@xxxxxxxx Government of Canada | Gouvernement du Canada ***************************************************************************** Quoting Marc <marc@xxxxxxxx>: > Dear all, > > I am looking for a copy of the following PhD: > Weintraub, M., 1985, A theory and computational model of auditory monaural > sound separation, Ph.D. > Dissertation, Stanford University Department of Electrical Engineering. > > To see the details of the resynthesis method used by Guy J. Brown and Martin > Cooke 1994 in > "Computational auditory scene analysis" (apparently inverting the output of > the gammatone filters). > > I can't have access to it through the net and the libraries of my town... > Does anybody know where this phd might be accessible? > > Thanks in advance, > > Marc > >

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