help in frame size, hamming window and fft on a wave form

Thread Starter

saharsahar

Joined Aug 16, 2010
28
hi, I have read my wave file with wavread('filename') , I want to extract the features of the sound . i know that I have to perform frame , hamming window and then fft. but I don;t know how I have to start. the fs is 14400 when I run the [fs]=waveread('filename'), anu thought, help, idea is highly appreciated.
thanks
 

wayneh

Joined Sep 9, 2010
17,496
You've asked a software question at a forum about circuit projects. You might do better at a forum for that software.
 

Thread Starter

saharsahar

Joined Aug 16, 2010
28
hi this is not a software question, I want to get a clue what I have to do before fft , like sampling , hamming window ,.....
 

bertus

Joined Apr 5, 2008
22,270
Hello,

Normaly you make an anti aliasing filter before the sampling.
The sampled info can be used to perform the FFT.

Bertus
 

Thread Starter

saharsahar

Joined Aug 16, 2010
28
thanks it was ver helpful , however I'm a bit confused.
with fs=22050 and N=195264(lenght of the wave file), would anybody please let me know How I have sample or creat the frames? thanks
 
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