Subject: Re: Robust method of fundamental frequency estimation. From: Arturo Camacho <acamacho@xxxxxxxx> Date: Tue, 27 Feb 2007 22:27:21 -0500 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>Dick, I was wrong, the cochlea model you and Slaney describe in "On the importance of time - a temporal representation of sound" DOES include half-wave-rectification. My fault was to assume that it was fine to replace in Slaney's Auditory Toolbox examples of pitch estimation the call to the LyonPassiveEar function by a call to the ERBFilterBank function, which does not include HWR. I did not realize that the former included half-wave-rectification. I apologize for the mistake. However, what I said about the equivalence of applying a summary autocorrelation to the output of a orthonormal linear filterbank and applying autocorrelation to the input signal is still true, it just does not apply to your model, because of the HWR. Arturo > > I recommend you google up "On the Importance of > Time," a chapter that Slaney and I wrote on how > these models work. An open issue in this class of models is how best to > summarize and pick a pitch from the correlogram; a study like you've done, > but applied to this different domain, would be interesting to see. > > Dick > > > -- __________________________________________________ Arturo Camacho PhD Candidate Computer and Information Science and Engineering University of Florida E-mail: acamacho@xxxxxxxx Web page: www.cise.ufl.edu/~acamacho __________________________________________________