Encoder and Decoder in Communication

Published on 29-Jun-2022

Encoder:

An encoder is a cooperative circuit or digital circuit that converts various alphanumeric characters, special symbols, special symbols, text, audio, and video used by humans into intelligible code on a computer or digital system.

In other words, it is a digital circuit that is used for encoding. That is, the encoder converts the analog signal into a digital signal.

Encoder Features-

The maximum number of output lines is obtained from 2n input lines of this circuit.

At any given moment, there is only one input 1, and all other inputs are 0.

The encoder plays the opposite function of the decoder.

The encoder is usually attached to the input device, i.e., the keyboard.

Encoder usage-

The encoder converts alphanumeric code to ASCII and EBCDIC code.

Converts decimal numbers to different codes.

Encoders can be used to convert decimal numbers to equivalent binary numbers.

Limitations:

When all inputs in the encoder are zero, the output cannot be determined.

If multiple inputs are active simultaneously, the encoder returns an output that may not be accurate.

Decoder:

A decoder is a type of cooperative circuit or digital circuit that converts the intelligible code of a computer or digital system into a human-understandable format.

In other words, it is a digital circuit that is used for decoding. That is, the decoder converts the digital signal into an analog signal.

Features of Decoder-

The maximum number of 2n output lines is obtained from this circuit's n number of input lines.

At any given moment, the value of a single output line is 1, and the value of all other output lines is 0. When the value of an output line is 1 depends on the value of the inputs.

The decoder plays the opposite function of the encoder.

The decoder is usually connected to the output device, i.e., the display unit.