Discrete-Time, Digital Signals

When analog signals are brought into a computer, they must be made discrete (finite and countable).

A discrete-time signal is a finite sequence of numbers, with finite possible values for each number.

• number values are limited by how many bits are used to represent them (bit depth);
• can be stored on a digital storage medium.

Sampling: the process of taking individual values of a continuous-time signal (at regular time intervals).