Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

autocorrelation function

Status
Not open for further replies.

sanam86

Newbie level 4
Joined
Jul 15, 2010
Messages
7
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,320
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.
 

Attachments

  • The autocorrelation function.pdf
    63.3 KB · Views: 10

sanam86

Newbie level 4
Joined
Jul 15, 2010
Messages
7
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,320
please help me, it's very important to me!
thank you all
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top