Re: Short-time frequency analyse.....

On Apr 17, 10:42 am, Maciek <shad...@xxxxx> wrote:
Hi, My main project's objective is to create map of Polish vowels,
which can be used in speech recognition. It'll use Self Organising
Map network. This network will learn 2D vectors of first two formants
of vowels. That was a short description. Now let's describe a
problem:

I have to make a preprocessing of signal to create a 2D vector of
first two formants of vowels( vowel is recorded in wave format).
These formants are extracted from short-time frequency spectrum of
spoken vowels. And I have to plot somehow a vowel short-time
spectrum, where signal apmlitude is on vertical axis and signal
frequency on horizontal.

This is called a spectrogram. If you have the Signal Processing
Toolbox, the function SPECGRAM will generate this plot for you.

- Randy

.

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