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[hts-users:02292] question about the mcep in SPTK!!

Dear all HTS users,


I’m analyzing the SPTK especially the mcep.


But I have something confusing..!!


In _mcep.c, therer are two frequency warping function freqt and frqtr.


I think both functions are used for frequency warping. But I can’t find any relationship with the paper what I’ve ever seen.


I saw the paper “An adaptive algorithm for mel-ceptral analysis of speech” written in 1992.


I can’t find any relationship with the paper. What equation refer to the freqt and what equation represent the frqtr in the paper?


Or did I see the wrong paper? (It was referenced in SPTKfre-3.2.pdf file)


Best Regards,

Youn-Sung Park