I'm dealing with Speech compression using CELP. And I'm having some problems.

This is the code you see https://www.mathworks.com/matlabcentral/fileexchange/39038-celp-codec I take it from the source.

I converted the wavread part to audioread. I corrected the file location. The error I get when I run the code is;

Error using audioread (line 105)

Expected input to be one of these types:

char, string

Instead its type was struct.

Error in CELP_RUN (line 5)

[y, Fs] =audioread(handel);

What can I do for these errors?

% The script to run the CELP codecs: 16 kbps CELP & 9.6 kbps CELP
clc,clear;

handel.wav = 'C:\Users\user\Desktop\CELP\handel.wav'; 
[y, Fs] =audioread(handel);

% Taking the input data from speech file
x = audioread(hfile);
N = 160;    % Frame length
L = 40;     % Sub-frame length
M = 12;     % Order of LP analysis
c = 0.85;   % constant parameter for perceptual weighted filter
Pidx = [16 160];

% Entering into the CELP analysis-by-synthesis codec
% creating the Gaussian codebook
randn('state',0);
cb = randn(L,1024);

% invoking the CELP codecs
[xhat1, e, k, theta0, P, b] = celp9600(x,N,L,M,c,cb,Pidx);
[xhat2, e, k, theta0, P, b] = celp16k(x,N,L,M,c,cb,Pidx);

% playing all the sound files
for i = 1:3,
    if(i==1),
        display('Playing the original sound file...');
        wavplay(x,8000);
    elseif(i==2),
        display('Playing the 16 kbps CELP generated sound file...');
        wavplay(xhat1,8000);
    elseif(i==3),
        display('Playing the 9.6 kbps CELP generated sound file...');
        wavplay(xhat2,8000);
    end
end
% plotting all the speech profiles
figure(1)
subplot(3,1,1)
plot(x)
axis([0 7*10^4 -1 1]);
xlabel('time'); ylabel('Amplitude');
title('The original speech samples');
subplot(3,1,2)
plot(xhat1,'m')
axis([0 7*10^4 -1 1]);
xlabel('time'); ylabel('Amplitude');
title('The CELP 16 kbps synthetic samples');
subplot(3,1,3)
plot(xhat2,'c')
axis([0 7*10^4 -1 1]);
xlabel('time'); ylabel('Amplitude');
title('The CELP 9.6 kbps synthetic samples');

% comparing all the synthetic speech profiles with original speech
figure(2)
plot([x xhat1]);
axis([0 7*10^4 -1 1]);
legend('original speech','16 kbps CELP speech');
xlabel('time'); ylabel('Amplitude');
title('The comparison of original speech & 16 kbps CELP synthetic samples');        
        
figure(3)
plot([x xhat2]);
axis([0 7*10^4 -1 1]);
legend('original speech','9.6 kbps CELP speech');
xlabel('time'); ylabel('Amplitude');
title('The comparison of original speech & 9.6 kbps CELP synthetic samples'); 

Answer 1

[Walter Roberson]

handel.wav = 'C:\Users\user\Desktop\CELP\handel.wav'; 

That creates a struct named "handel" with a field named "wav" that is the character vector

[y, Fs] =audioread(handel);

That asks to use the struct as the name of the file to read -- which fails because a file name is expected at that point, not a struct

What you should have done is

handel = 'C:\Users\user\Desktop\CELP\handel.wav'; 

[Mert Sari]

Thank you, I solved all the problems. When I run the code, it also gives all the graphics. I just want to listen to the audio file I'm running. How can I do that?