MATLAB: Adding of signals

speech processing

Hi, When we add two images, we need to maintain same dimension to add. I need to add two wave signals. How to alter their dimensions, so that i can add.

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The imresize in your Image Processing Toolbox will also work on one dimensional signals.

% Make wave 2 the same length as wave 1.
resizedWave2 = imresize(wave2, length(wave1));

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MATLAB: Signals addition

Assuming they correspond to the same sampling rates, truncate one of them to be of the same length as the smaller one:

n1 = length(x1);
n2 = length(x2);
% Assuming n1 < n2
x2 = x2(1:n1)

Or maybe you want to interpolate

x2 = interp1(1:n2, x2, linspace(1, n2, n1));

Or maybe you want to refer back to your other question: http://www.mathworks.com/matlabcentral/answers/36587-adding-of-signals

MATLAB: I have a question about multiplying two series…

You can simplify the code to:

n = min([n1(:); n2(:)]): max([n1(:),n2(:)]);
y1 = zeros(1,length(n)); 
y2 = y1;
y1(n >= min(n1) & n <= max(n1)) = x1;
y2(n >= min(n2) & n <= max(n2)) = x2;
y = y1.*y2;

The find part and == 1 was really unnecessary.

Now basically you index in y1 the values which are in the range [min(n1) max(n1)] and asign to those values x1.

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Related Solutions

MATLAB: Signals addition

MATLAB: I have a question about multiplying two series…

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