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

Discussion in 'The Projects Forum' started by saharsahar, Feb 14, 2011.

  1. saharsahar

    Thread Starter New Member

    Aug 16, 2010
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    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
     
  2. wayneh

    Expert

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

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  4. saharsahar

    Thread Starter New Member

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

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    Hello,

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

    Bertus
     
  6. saharsahar

    Thread Starter New Member

    Aug 16, 2010
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    would you please explain more, I'm newby in fft and even in matlab , thanks
     
  7. bertus

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  8. saharsahar

    Thread Starter New Member

    Aug 16, 2010
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    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
     
  9. bertus

    Administrator

    Apr 5, 2008
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