Difference between continuous time signal and discrete-time signal

A continuous-time signal has values for all points in time in some (possibly infinite) interval. A discrete time signal has values for only discrete points in time.

1. What is the difference between CT signal and DT signal?
2. What is continuous-time signal?
3. What is the difference between continuous-time signal and analog signal?
4. What is the difference between discrete time signals and sequences?

What is the difference between CT signal and DT signal?

Continuous-time (CT) signals are functions from the reals, ℜ, which take on real values; and discrete-time (DT) signals are functions from the integers Z, which take on real values.

What is continuous-time signal?

A continuous-time (CT) signal is a function, s(t), that is defined for all time t contained in some interval on the real line. For historical reasons, CT signals are often called analog signals.

What is the difference between continuous-time signal and analog signal?

A continuous signal cannot be stored, or processed, in a computer since it would require infinite data. Analog signals must be discretized (digitized) to produce a finite set of numbers for computer use. When analog signals are brought into a computer, they must be made discrete (finite and countable).

What is the difference between discrete time signals and sequences?

Continuous-time signals are often referred to asanalog signals. Discrete-time signalsare defined at discrete times, and thus, the independent variable has discrete values; that is, discrete-time signals are represented as sequences of numbers.