Differences between analog signal and digital signal are given below :Analog signal is a continuous signal whereas Digital signal is discrete time signal.Analog signal is denoted by sin waves whereas Digital signal is denoted by square waves.Analog signal has high noise whereas Digital signal has less noise.Analog signal is stored in the form of wave signal whereas Digital signal is stored in the form of binary bit.Analog signal has less cost whereas Digital signal has high cost.Analog signal example is - Human voice whereas Digital signal example is Computer system.HDMI Encoder Modulator,16in1 Digital Headend,HD RF Modulator at SOUKA https://www.soukacatv.com/.Purely digital signals exist as a sequence of samples.
A wireless transmission that contains digital information still ultimately uses an analog signal to propagate through the air.Analog signal: (continues signals )1.analog signal is continues signals which represents physical measurements .2.wave : denoted by sine wave3.
Best suited for audio and video transmission.Digital Signals1.Digital signals are discrete time signals generated by digital modulation.2.wave : denoted by square wave3.Examples :Computers, CDs, DVDs, and other digital electronic devices.4.Representation: Uses discrete or discontinuous values to represent information5.Data Transmission: Can be noise-immune without deterioration during transmission and write/read cycle.6.Uses :Best suited for Computing and digital electronic.To understand this difference, let us go back a bit and start with the very basics:Q: What is a signal?- A signal is a plot of the value of a physical quantity/parameter with respect to time.
For example, the value of an analog signal can be extracted at 0s, 1.5s, 4.908675s etc.- All real world signals are analog in nature.Q: What are signals used for?- There are three things that can be done with a signal:1.Store the signal for later use2.Process the signal (convert it to some other form, perform some operations on the signal etc)3.Transmit the signal to some other destination to be used there.- Now, since analog signals are continuous, it will have infinite number of values considering the value at each instant of time.
If it is present, we call it Logic1, or simply 1, and if it is absent we call it Logic0, or simply 0.- Analog signals are converted into digital signals, processed in digital form and converted back to analog on need basis, because it is easier to handle/work with digital signals.- we cannot completely do away with analog signals, so at the earliest possible time we take the analog signal and if the signal is very weak, we amplify it to a desirable level and convert it into a digital signal.Let me try to answer your question in most easiest way.
Lathi of analog and digital communication system, signals are defined of four types based on which axis (time or amplitude) is sampled:Continuous time and continuous amplitude signal: this type of signal is continuous in both axis and neither of the axis is sampled.