How to normalize a discrete signal?

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RoBoTBoY 2021-1-23

评论： Adam Danz 2021-1-24

Hello!!

I want to calculate the signal energy in rolling windows, after first normalizing to interval [-1,1].

Firstly, I wrote the below code to read and sound the signal.

[y,Fs] = audioread('viola_series.wav');
plot(y);
title('Audio viola series.wav');
sound(y,Fs);

How to do the normalization?

Thanks in advance

Adam Danz 2021-1-23

Audio data are typically already normalized between [-1,1]. Are you getting values outside of that range?

min(y)
max(y)

Anyway, this is how to normalize any vector to [-1,1];

ynorm = (y-min(y))/range(y)*2-1;

Adam Danz 2021-1-24

The normalization to [0,10] would have been

n = (x-min(x))/range(x)*10;

Adam Danz 2021-1-24

Since you're new question differs greatly from the original one, it would be better to post it as a new question.

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