audio signal in spectrogram
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Hello,
How to apply window function for a audio signal in spectrogram and compare it with the one without applying window function ?
采纳的回答
Wayne King
2013-3-7
编辑：Wayne King
2013-3-7
You can supply the window argument as a vector.
Signal
t=0:0.001:2;
x=chirp(t,0,1,150);
Now to find the short-time Fourier transforms
% without a window
win = ones(200,1);
[S,F,T] = spectrogram(x,win,100,200,1000);
% with a hamming window
win = hamming(200);
[Swin,Fwin,Twin] = spectrogram(x,win,100,200,1000);
3 个评论
Gokul
2013-3-7
Gokul
2013-3-8
Wayne King
2013-3-8
[S,F,T] = spectrogram(x);
is not without a window. If you read the documentation, you'll see that syntax uses a Hamming window.
I've shown you how to not use a window function above. Use a vector of ones, or rectwin()
更多回答（1 个）
UMAIR RASOOL
2020-8-1
0 个投票
close all
clear all
clc
[y,Fs]=audioread('black_hole.mp3');
windowSize = 256;
windowOverlap = [];
freqRange = 0:Fs;
spectrogram(y(:,1), windowSize, windowOverlap, freqRange, Fs, 'xaxis');
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