Data segmenting with overlap and then multiplying each segment with hammond and rectangular window

Hello! This is currently my code:

[x,fs1] = audioread('Male1.mp3');

z1=x-mean(x);

t=(1:N)/10000;

z=x-mean(x);

w1=hamming(N);

w2= rectwin(N);

y=z.*w1;

figure;

plot(t,z,'k',t,y,'r');

xlabel('Time (s)'); ylabel('Amplitude');

figure;

y1=z1.*w2;

plot(t,y1);

It plots, but I want to overlap the data into 50 and 100 ms long overlapping segments. Would I have to use a buffer function? I'm not too familiar with Matlab. Thank you!

[Ryan Le]

I also forgot to mention. Would I multiply each segment afterwards with the rectangular or window function to obtain their respective windows?

[Mathieu NOE]

hello

you can have a look at pwelch function to see how overlapping and windowing is done for fft spectral analysis

edit pwelch

[Ryan Le]

I think I'm supposed to do it in time domain.

[Mathieu NOE]

Yes, windowing applies on time domain , before you do fft

[Ryan Le]

yes but the welch function plots in terms of frequency domain. Wouldn't I have to apply buffer to get these time segments?

[Mathieu NOE]

ok maybe I added some confusion in my last answers

the original question was simply to define overlapping sections of signal, not windowing and fft as with pwelch

see buffer : Buffer signal vector into matrix of data frames - MATLAB buffer - MathWorks France

Answer 1

[Shubham Khatri]

Hello,

For more information please go through the documentation of buffer function here.

Hope it helps