# What Is the Point of Doing the Zero Padding? [duplicate]

• @MBaz wrong. Impossible duplicate. Completely different question. I ask the advantages and disadvantages of zero-padding, in particular the case of speech signals. Any input?
– user38784
Commented Nov 11, 2018 at 22:53
• Do you have a real question in your mind or just want a puzzle? Zero padding is the process of appending zeros to the end of a shorter sequence to make it trivially longer. It has consequences but not kind of advantages or disadvantages. So if you have any real question in your mind, please ask it straight. Commented Nov 11, 2018 at 23:15
• @Fat32 is this a site only for questions that you consider real? C'mon, I'm here to learn :) Sorry if my question is a puzzle for you. ;)
– user38784
Commented Nov 11, 2018 at 23:27
• @Fat32 you and me both ;)
– user38784
Commented Nov 11, 2018 at 23:37

You may think of it as efficient way to apply Dirichlet Window Based interpolation in the Fourier Domain.

The advantage of applying the interpolation using Zero Padding in the Time Domain is very simple - it is simpler and more computationally efficient.

• but MBaz is correct. there are other answers that speak to zero-padding. using zero-padding in one domain does accomplish a specific form of interpolation in the reciprocal domain. but one is not completely able to define the form of that interpolation using zero-padding. if it's only zero-padding, you are essentially applying a rectangular window to that segment of signal. you can window with something other than a rectangular window, and the result is convolving the spectrum with something other than a dirichlet sinc function. Commented Nov 13, 2018 at 5:32
• @robertbristow-johnson, We can always extend the question asked. But answering directly on what is written is given zero padding and not zero padding and...
– Royi
Commented Nov 13, 2018 at 14:47