CODEWITHSUNDEEP
matlabwav
A. Mesut Konuklar
A. Mesut Konuklar

Reputation: 609

How to convert echo'ed voice to normal voice?

I am working on MatLab and trying to improve myself.

I've currently converted some .wav file to echoed version with a function below 

function [ ] = lab2echo(alpha,m )

fil=wavread('daffy.wav'); 
fil=transpose(fil);
fil2=[fil zeros(1,m)];
shifting_fil=[zeros(1,m) fil];
fil_echo=alpha*shifting_fil;
result=fil2+fil_echo;
sound(result);
end

and now I want to write a function that converts echoed voice to old version.

Is there any easy way to do it?

Upvotes: 0

Views: 281

Answers (2)

Aki Suihkonen
Aki Suihkonen

Reputation: 20027

Most likely not an easy way. But you can try to first to use xcorr to cross correlate the signal by itself to find the lag. Then you would have to estimate the contribution of the echo and subtract that.

There could be a value alpha, that minimizes the energy of signal + alpha*delayed_signal, where alpha>0.

Upvotes: 0

CookieOfFortune
CookieOfFortune

Reputation: 13974

Calculate the cross correlation of the signal to itself. You should get two peaks. The difference between the peaks should be the echo delay.

Upvotes: 2

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