CODEWITHSUNDEEP
matlabfft
Toygan
Toygan

Reputation: 422

FFT for speech signal with dividing frames in MATLAB

I want to take FFT of speech signal first dividing the signal into 64 sample frames. I can do it by simply using "for" loops. However I'm sure there is a way to do in MATLAB in simpler manner. The thing I'm trying to do is simply: Taking FFT of 

x1 = [ 1 2 3 4 6];
x2 = [ 2 3 1 3 5];
x3 = [ 3 3 4 5 6];
x  = [x1;x2;x3];
fft(x);

After I search, I realized that there is a parameter in FFT which is "dimension". However in my case, my matrix is 2015X64. How can I generate this new matrix with my original speech signal? When I want to use reshape, it seems that it is not proper to do this. Any help will be appreciated.

Upvotes: 0

Views: 920

Answers (1)

Luis Mendo
Luis Mendo

Reputation: 112689

I think this does what you want

x = randn(1, 2015*64);      % // example data vector
x = reshape(x, 64, []).';   %'// separate x into rows of 64 columns
y = fft(x, [], 2);          % // take DFT of each row

Upvotes: 2

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