Overlap add synthesis

1. What is overlap save and add method?
2. Why do we use overlap-add method?
3. What is overlapping in signal processing?

What is overlap save and add method?

Two methods that make linear convolution look like circular convolution are overlap-save and overlap-add. The overlap-save procedure cuts the signal up into equal length segments with some overlap. Then it takes the DFT of the segments and saves the parts of the convolution that correspond to the circular convolution.

Why do we use overlap-add method?

The overlap-add method is used to break long signals into smaller segments for easier processing. FFT convolution uses the overlap-add method together with the Fast Fourier Transform, allowing signals to be convolved by multiplying their frequency spectra.

What is overlapping in signal processing?

Overlapping of signals happens when signals from two or more than two origins are broadcast at an equal frequency.