Can someone pls help me with this code. (mfcc)

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Gaurav Sharma
Gaurav Sharma 2018년 11월 23일
댓글: hanif omar 2021년 1월 19일
whenever I am trying to run the code it is throwing an error i.e. =>
"Undefined function or variable 'melfilter'.
Error in mfcc (line 29)
filterBankMat = melfilter(N, Fs,@hamming); % matrix for a mel-spaced filterbank
Error in phase1 (line 17)
M = mfcc(y, Fs);"
% ============================================================
function c = mfcc(y, Fs)
% MFCC Calculate the mel frequencey cepstrum coefficients (MFCC) of a signal
% Inputs:
% y : speech signal data
% Fs : sample rate in Hz of the speech signal data y
% Outputs:
% c : MFCC output, each column contains the MFCC's for one speech frame
N = 256; % frame size
M = 100; % inter frame distance
len = length(y);
numberOfFrames = 1 + floor((len - N)/double(M));
mat = zeros(N, numberOfFrames); % vector of frame vectors
for i=1:numberOfFrames
index = 100*(i-1) + 1;
for j=1:N
mat(j,i) = y(index);
index = index + 1;
hamW = hamming(N); % hamming window
afterWinMat = diag(hamW)*mat; % square diagonal matrix
freqDomMat = fft(afterWinMat); % FFT into freq domain
filterBankMat = melfilter(20,N, Fs); % matrix for a mel-spaced filterbank [HERE IT IS THROWING ERROR].
nby2 = 1 + floor(N/2);
ms = filterBankMat*abs(freqDomMat(1:nby2,:)).^2; % mel spectrum
c = dct(log(ms)); % mel-frequency cepstrum coefficients
c(1,:) = []; % exclude 0'th order cepstral coefficient

채택된 답변

Gaurav Sharma
Gaurav Sharma 2018년 11월 23일
on the mathwork website, melfilter is gievn as predefined funcion which can be directly used. That's why I am a bit confused. And if am trying to put melfiter as an input in the argument of the function mfcc, it throws an error of not enough input defined.
what should I do now?? I want to run this code since it is my project. Pls help me !!!
  댓글 수: 6
hanif omar
hanif omar 2021년 1월 19일
Dear @Gaurav Sharma , is this mfcc code start from pre emphasis ?

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추가 답변(1개)

Jacob Shulman
Jacob Shulman 2018년 11월 23일
if melfilter is a matrix you want to use then it must be an input to the function or be created and defined wihtin the function. functions create different new workspaces with new variables.

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