analogue and digital
analogue data |
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Analogue data is data that is represented in a physical way. Where digital data is a set of individual symbols, analogue data is stored in physical media, such as the surface grooves on a vinyl record, the magnetic tape of a VCR cassette, or other non-digital media. Analogue signals are transmitted by modulating a continuous transmission signal. An example of this is telephones which take sound vibrations and then turn them into electrical vibrations of the same shape before they are transmitted over the telephone lines
digital dataDigital data is data that represents other forms of data using specific machine language systems that can be interpreted by various technologies. The most fundamental of these systems is a binary system, which simply stores complex audio, video or text information in a series of binary characters, traditionally ones and zeros, or "on" and "off" values. digital Vs. analogueThe differences between analogue and digital is that digital tends to be noise-immune without deterioration during transmission and the write/read cycle. Also, the recording does not degrade over time. Also, digital data can be compressed while analogue can't. It is also easy to use special computers called digital signal processors (DSPs) to process and modify streams of numbers. Cost tends to be high and not easily portable. Digital hardware is flexible in implementation and it is also best suited for computing and digital electronics. In addition, digital data consumes more bandwidth to carry out the same information, while analogue doesn't. Digital data does not take as much power unlike analogue does.
On the other hand, analogue tends to be subjected to deterioration by noise during transmission and write/read cycle.Also, analogue data is likely to get affected which makes the data lose accuracy. Analogue data can only be used in analogue devices only such as audio and video transmission.Analog signal processing can be done in real time and consumes less bandwidth. Analogue tends to be cheap and portable whereas it draws out a lot of power. conversion between analogue and digital signalsAnalogue-to-digital conversion is an electronic process in which an analogue signal is changed to a digital signal. A typical telephone modem makes use of an ADC to convert the incoming audio from a twisted-pair line into signals the computer can understand. In a digital signal processing system, an ADC is required if the signal input is analogue.
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