sanam86
Newbie level 4
Hi all,
I'm trying to do pitch estimation using autocorrelation function. I've calculated ACF in frequency domain(fft,ifft) but the result isn't true. The input speech is voiced so the ACF should be periodic along time axis, but the result is vice versa ,i.e., it's periodic along frequncy axis!!
another question: Is acf=ifft(|fft(x)|^2) same as the (rceps) matlab function?because in rceps there isn't any power of 2?!
Can anyone help me about these or give me a useful matlab code for ACF calculation?
There is an attached file of my result in matlab.
I'm trying to do pitch estimation using autocorrelation function. I've calculated ACF in frequency domain(fft,ifft) but the result isn't true. The input speech is voiced so the ACF should be periodic along time axis, but the result is vice versa ,i.e., it's periodic along frequncy axis!!
another question: Is acf=ifft(|fft(x)|^2) same as the (rceps) matlab function?because in rceps there isn't any power of 2?!
Can anyone help me about these or give me a useful matlab code for ACF calculation?
There is an attached file of my result in matlab.