Encoder, Mux, Decoder and Demux

What is difference between a multiplexer and encoder? also What is the between demultiplexer and decoder?

Questions by pawannarang007

Showing Answers 1 - 3 of 3 Answers


  • Dec 12th, 2010

MULTIPLEXER: The device which chooses the input channels. It has several
input channels but the output signal from all these channels is sent to one
single output channel.

DE-MULTIPLEXER: The device which is chooses the output channels. It has a
single input channel but outputs the signal from this single channel to several
output channels (one channel at a time)

Decoders are essentially DeMUXes. However, encoders are not essentially MUXes.
Roughly speaking, decoders convert from binary to unary, while encoders convert
from unary to binary.

The way in which the computer data is represented is known as encoding, there
are several encoding techniques (Unipolar, Bipolar and Biphase).
Creating a video file in a special format (e.g. DivX, MPEG-2, MPEG-4, ...) -
You´ll need a DivX Encoder in order to be able to create DivX files and a MPEG-2
Encoder in order to be able to create MPEG-2 videos.
Opening/playing/reading/watching a file (Decoding) and making a file (Encoding)

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hagos haftu

  • Jan 14th, 2015

yes it is very useful but as comment the description of the combination circuits should be supported by their practical circuits ,,,,the rest it is good

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  • Apr 2nd, 2015

multiplexer is converted many signal to one signal by multipexing and encoder is encrypt single for sequrity.
demux and decoder is same work but opposite

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