Discrete-Time Signal

A discrete-time signal is a mathematical way to represent information that changes over time but only at specific, separate moments rather than continuously. Imagine recording the temperature once every hour instead of every second; these hourly readings form a discrete-time signal. This contrasts with continuous signals, which are defined at every instant. Discrete-time signals are fundamental in digital systems like computers and digital audio, where information is processed in distinct steps, enabling efficient storage, processing, and analysis of data that varies over time.