Sir, I tried the code for GFCC but it showing the error, how to rectify this error.

Question

Suchithra K S 2018-11-27

0
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https://ww2.mathworks.cn/matlabcentral/answers/432215-sir-i-tried-the-code-for-gfcc-but-it-showing-the-error-how-to-rectify-this-error

回答： Walter Roberson 2018-11-27

The code is given below, 
[audio, fs1] = audioread('cryrumble.wav');
%sound(x,fs1);
   ts1=1/fs1;
    N1=length(audio);
    Tmax1=(N1-1)*ts1;
    t1=(0:ts1:Tmax1);
    figure;
  plot(t1,audio),xlabel('Time'),title('Original audio');
  fs2 = (20/441)*fs1;
  y=resample(audio,2000,44100);
%sound(y,fs2);
   ts2=1/fs2;
   N2=length(y);
   Tmax2=(N2-1)*ts2;
   t2=(0:ts2:Tmax2);
   figure;
   plot(t2,y),xlabel('Time'),title('resampled audio');
%   % spectrogram(y);
  nchan = size(y,2);
for chan = 1 : nchan
  %subplot(1, nchan, chan)
  spectrogram(y(:,chan), 256, [], 25, 2000, 'yaxis');
  title( sprintf('spectrogram of resampled audio ' ) );
end
% Step 2: Frame Blocking
     frameSize=1000;
%     frameOverlap=128;
%     frames=enframe(y,frameSize,frameOverlap);
%     NumFrames=size(frames,1);
frame_duration=0.06;
frame_len = frame_duration*fs2;
framestep=0.01;
framestep_len=framestep*fs2;
% N = length (x);
num_frames =floor(N2/frame_len);
% new_sig =zeros(N,1);
% count=0;
% frame1 =x(1:frame_len);
% frame2 =x(frame_len+1:frame_len*2);
% frame3 =x(frame_len*2+1:frame_len*3);
frames=[];
for j=1:num_frames
     frame=y((j-1)*framestep_len + 1: ((j-1)*framestep_len)+frame_len);
%     frame=x((j-1)*frame_len +1 :frame_len*j);
%     identify the silence by finding frames with max amplitude less than
%     0.025
max_val=max(frame);
   if (max_val>0.025)
%     count = count+1;
%     new_sig((count-1)*frame_len+1:frame_len*count)=frames;
    frames=[frames;frame];
   end
   end
   % Step 3: Hamming Windowing
NumFrames=size(frames,1);
hamm=hamming(1000)';
windowed = bsxfun(@times, frames, hamm);
      
     % Step 4: FFT 
% Taking only the positive values in the FFT that is the first half of the frame after being computed. 
       ft = abs( fft(windowed,500, 2) );
       plot(ft);
%greenwood filterbank
x=0:1000;
fmin=10;
fmax=10000;
K=0.88;
A=fmin/(1-K);
a=log10((fmax/A)+K);
f=A*(10.^((A.*x)-K));
perceived_freq_Fp=(1/a)*(log10((f/a)+K));
%perceived_freq_Fp=(1/a)*(ln((f/a)+K)/ln10);
%perceived_freq_F=A*((10^(ax))-K);
plot(f);
Nofilters=20;
    lowhigh=[300 fs2/2];
    
    %Converting to frequency resolution
    fres=floor(((frameSize)+1)*f/fs2); 
    %Creating the filters
    for m =2:length(f)-1
        for k=1:frameSize/2
     if k<fres(m-1)
        H(m-1,k) = 0;
    elseif (k>=fres(m-1)&&k<=fres(m))
        H(m-1,k)= (k-fres(m-1))/(fres(m)-fres(m-1));
    elseif (k>=fres(m)&&k<=fres(m+1))
       H(m-1,k)= (fres(m+1)-k)/(fres(m+1)-fres(m));
    elseif k>fres(m+1)
        H(m-1,k) = 0;    
     end 
        end
    end
        %H contains the 20 filterbanks, we now apply it to the
    %processed signal.
    for i=1:NumFrames
    for j=1:Nofilters
        bankans(i,j)=sum((ft(i,:).*H(j,:)).^2);
    end
    end
    % Step 6: Nautral Log and DCT
%     pkg load signal
    %Here logarithm is of base '10'
    logged=log10(bankans);
    for i=1:NumFrames
        gfcc(i,:)=dct2(logged(i,:));
    end
    %plotting the GFCC
    figure 
    hold on
    for i=1:NumFrames
        plot(gfcc(i,1:13));
    end
    hold off
% save c5 gfcc
g= gfcc;
save g g
load g.mat
X=g;
[IDXi,cg] = kmeans(X,K);
save c41g cg
 
    
the error is like this,
> Untitled5
Warning: Ignoring rows of X with missing data. 
> In kmeans (line 164)
  In Untitled5 (line 134) 
Error using kmeans (line 265)
K must be a positive integer value.
Error in Untitled5 (line 134)
[IDXi,cg] = kmeans(X,K);
 