Do you know what type of warp function (inverse_linear, linear or piecewise)
in sphinx_fe corresponds to the warp_function HCopy uses to vocal tract length
normalization?
I'm trying to perform a feature extraction with sphinx_fe to generate the same
( or the closer) .mfc I get using HCopy, so if you have some information that
could help me, please let me know.
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Hey, the C front-end in sphinxbase can generate HTK features although they
need to be rearranged a bit... The options corresponding to the HTK config
above are:
-round_filters no
-unit_area no
-remove_dc yes
-transform htk
-lifter 22
-nfilt 26
-lowerf 1
-upperf 8000
Note, however, that liftering does absolutely nothing if you use CMN.
Likewise, -unit_area makes no difference either in this case.
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
However, I'm still having problems with the , and . As you can see in the htk
and sphinx output below, the values of this coefficients remains far from
being similar.
frame#: c c c c c c c c c c c c c
0: 55.125 -10.512 -14.357 -9.635 -1.656 0.207 -13.878 -26.570 -4.790 3.916
-3.998 -8.733 4.924
1: 56.364 -7.729 -10.867 -6.368 -2.854 -5.398 -20.044 -20.778 -7.683 10.223
-0.931 -0.569 7.168
Here are my HCopy and sphinx_fe config file. Note that in order to compare
just the 13 cepstrals coefficients, I'm no using the D, A and Z options in
HCopy.
Hi,
Do you know what type of warp function (inverse_linear, linear or piecewise)
in sphinx_fe corresponds to the warp_function HCopy uses to vocal tract length
normalization?
I'm trying to perform a feature extraction with sphinx_fe to generate the same
( or the closer) .mfc I get using HCopy, so if you have some information that
could help me, please let me know.
http://nsh.nexiwave.com/2009/09/using-htk-models-in-sphinx4.html?showComment=
1254025513274#c8154075213468076053
Hey, the C front-end in sphinxbase can generate HTK features although they
need to be rearranged a bit... The options corresponding to the HTK config
above are:
Note, however, that liftering does absolutely nothing if you use CMN.
Likewise, -unit_area makes no difference either in this case.
Thank you for your reply, it helped a lot!
However, I'm still having problems with the , and . As you can see in the htk
and sphinx output below, the values of this coefficients remains far from
being similar.
HTK output:
Sphinx output
Here are my HCopy and sphinx_fe config file. Note that in order to compare
just the 13 cepstrals coefficients, I'm no using the D, A and Z options in
HCopy.
Am i doing something wrong?
Sorry, do you mean you see the difference in first 3 frames and other frames
are correct?
No, I mean the c0, c1 and c3 (in HTK C0, MFCC-1 and MFCC-3). The others in my
opinion are okay.
Sphinx
HTK