I was trying to do cross correlation. But I am not understanding some of the logic of few functions. Can anyone please explain it to me?

function speechrecognition(filename)

voice=audioread(filename);

x=voice;

x=x';

x=x(1,:);

x=x';

y1=audioread('C:\Users\saika\OneDrive\Desktop\Train_Test data\Test data\T-1.mp3');

y1=y1';

y1=y1(1,:);

y1=y1';

z1=xcorr(x,y1);

m1=max(z1);

Here is my code.

So my main question is:

x=voice;

x=x';

x=x(1,:);

x=x';

Q: what does above four lines actually means in this code?

[Sharmin Kibria]

I do not think the lines you mentioned have too much impact if x and y are column vectors. You are essentially converting a column vector to arow vector and then turning it back to column vectors. Even for matrices, these lines do not make any significant difference. If x is a matrix, you are essentially picking the first column of the matrix. In that case, you replace the lines by x = voice(:,1);