What is the Difference Between Encoder and Decoder?
Apart from the use of the encoder being totally opposite to that of the decoder, there are other differences between the two. The difference between encoder and decoder is explained in the table provided below:
|Key Differences Between Encoder and Decoder|
|Used to convert raw signals to coded signals.||Used to convert coded signals to the original or raw form of signals.|
Output - n
Input - n
Output - 2n
|The operation of the encoder is a simple process.||The operation of the decoder is a complex process.|
|Produces coded outputs.||Produces active/raw/original outputs.|
|Uses OR gate.||Uses AND gate along with NOT gate.|
|Example: video encoders, Emails, etc.||Example: Memory storage devices, microprocessors, etc.|
What is an Encoder?
Before finding out about the difference between encoder and decoder, let us explore in brief about encoders. The encoder is a type of combination logic circuit and is used specifically to convert the input signal as binary code. The encoder is a component that is used to transform an analogue signal into a coded signal.
If there are '2n' number of inputs in the encoder then it will generate 'n' number of outputs which will be a coded signal. For example, if there are 4 inputs in an encoder, then it will produce 2 outputs. Similarly 3 outputs for 8 inputs and so on
What is a Decoder?
The decoder is also a type of combinational logic circuit. The functioning of a decoder is opposite to that of the encoder. It is used to convert the coded inputs into original signals. The decoder is thus known as the component which is used to transform the coded signal back to the original signal.
If there are 'n' number of input signals in a decoder then it will produce the '2n' number of outputs. Internal logic circuits are used to convert the coded signal to the original form.
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