code for triangular filter banks and MFCC

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DOORYODHUN AHKU
DOORYODHUN AHKU 2021-7-11
评论： jibrahim 2021-7-14
hi,
I having problem to create code for triangular filter banks and mfcc for the attached audio file. I would be much gratful if you could help me .im so deperate. Was working on it since a month but my code did not work.
Thank you
Kinds
Dan

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jibrahim
jibrahim 2021-7-12
There are two functions in Audio Toolbox that you can use for this task:
mfcc: Computes MFCC codefficients for you
designAuditoryFilterBank: Designs the triangular filter bank
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DOORYODHUN AHKU
DOORYODHUN AHKU 2021-7-14
Hi Ibrahim,
I will need a bit of help.
I did the following below and i got an error message saying 'designAuditoryFilterBank' requires Audio Toolbox.
Could you please advise
Thank you
Dan
fs = 48000;
fb = designAuditoryFilterBank(fs)
filterBank = designAuditoryFilterBank(fs)
numBands = size(fb,1) %#ok<NASGU>
numBands = 32
numPoints = size(fb,2) %#ok<NASGU>
numPoints = 513
[audioIn,fs] = audioread("mif_02484_00047480027.wav");
win = hamming(1024,"periodic");
noverlap = 512;
fftLength = 1024;
[S,F,t] = stft(audioIn,fs, ...
"Window",win, ...
"OverlapLength",noverlap, ...
"FFTLength",fftLength, ...
"FrequencyRange","onesided");
PowerSpectrum = S.*conj(S);
[fb,cf] = designAuditoryFilterBank(fs, ...
"FFTLength",fftLength, ...
"NumBands",numBands, ...
"FrequencyRange",range, ...
"Normalization",normalization);
plot(F,fb.')
grid on
title("Mel Filter Bank")
xlabel("Frequency (Hz)")
jibrahim
jibrahim 2021-7-14
Dan,
the function is part of the Audio Toolbox product, so you need Audio Toolbox to be available.

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