Is there any difference between the two?

When we say discrete signal, does it only implies that x-axis or time is discrete? Or it can also mean discrete amplitudes y-axis?

Or the signal is called digital only when both of its axis are discrete?

Is there any difference between the two?

When we say discrete signal, does it only imply that the x-axis or time is discrete? Or it can also mean discrete amplitudes on the y-axis?

Or is the signal is called digital only when both of its axes are discrete?

Is there any difference between two?

When we say discrete signal,does it only implies that x axis or time is discrete? Or it can also mean discrete amplitudes y axis?

Or the signal is called digital only when both of its axis are discrete??

Is there any difference between the two?

When we say discrete signal, does it only implies that x-axis or time is discrete? Or it can also mean discrete amplitudes y-axis?

Or the signal is called digital only when both of its axis are discrete?