# Discrete vs discretized signals

Ive heard both of these terms and i am still having trouble to understand what is the difference between these two. As far as i understood, the only difference between discrete and discretized signal, is the x axis of it, for example if i have a single dirac at the $$\Omega_0$$ frequency it is considered to be discretized signal if its x axis has $$\Omega$$ as a variable

However, if we want to make this a discrete signal, we need to somehow manipulate the value on the x-axis (normally we should have n at the x axis if we want to have discrete signal).

I hope that question wasn't confusing. Any help appreciated!

EDIT:

What if i have a discretized signal, how am i supposed to make discrete signal out of it?

Discrete: A discrete time signal is one that is only defined at integer indices. Like you said, usually the notation for these indices are $$n$$.
Discretize: A discretized signal is one that is made to be discrete time. For example, if you have a continuous time signal, $$x(t)$$, and you sample it at some sampling period, $$T$$, you have discretized the signal and now have the discrete time signal $$x[n]$$.
• I see, but what to do when i have a discrete frequency domain signal and i want to have discrete signal. Like, i have an infinite sum of dirac pulses in frequency domain and i have $\Omega$ at the x axis, how can i turn x axis in that case to be $n$? Jun 10 '19 at 18:32