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In today’s modern world, sending, storing, and interpreting information plays a crucial role in the functioning of all electronic-based systems, whether digital, analogue, computer, or software systems. In its widest sense, an encoder is a system component that converts information from one form to another. A decoder is a component that respects the operation and restores the data to its original or previous condition.
Using combinational logic, two or more input states can define one or more output states. The circuits used in combinational logic are the encoder and decoder. In which boolean algebra is used to implement combinational reasoning.
What exactly is Encoder?
Active data impulses are converted into coded messages, or analogue signals are converted to digital signals using an encoder. A combinational circuit converts binary data from N output lines representing the input’s N bit code from 2N input lines. When an encoder is used, the logic circuitry converts an input signal into a coded binary output.
A decoder is a gadget that carries out this function. Decoding involves doing the reverse action, turning a code into its unambiguous form.
More about Encoder
As was already said, an encoder translates data from one format to another to standardise, increase transmission speed and accuracy, and ensure data security. The encoder may reduce the necessary storage space by changing the data format.
Electrical circuits employ encoders to reduce a large number of digital binary inputs to a smaller number of outputs. The electrical encoders DACs (Digital to Analog Converters) and ADCs are two distinct sorts (Analog to Digital Converters). In telecommunications, encoders are used to convert input bit streams into a standard code for transmission.
Additionally, encoding acts as a security measure. Information may be encrypted using an encoder before transferring or storing, making it safe and inaccessible without the right decoding technique.
Convolution, CTC, and differential encoders are a few examples of encoders. Forward Error Correction is the name of this module’s primary purpose.
What exactly is Decoder?
The same combinational circuit is used by both an encoder and a decoder, although they work differently. To create the original signal from the coded input signal, a decoder converts n lines of input into 2n lines of output. An AND gate can serve as the basic decoding element since it only produces a high output when all of its inputs are high.
CTC decoder, Viterbi decoder, and differential decoder are some examples of decoders.
More about Decoder
A decoder reverses the actions of an encoder and returns the data to its original format or another usable one. For example, in electronics, if a signal is encoded for transmission using an Analog to Digital Converter, the signal must be decoded by the receiver using a Digital to Analog Converter to restore the original analogue signal. In this case, DAC acts as the encoder and ADC as the decoder.
Every encoding system or approach discussed above has a corresponding decoding mechanism for information retrieval.
A specific word for the hardware aspect of information format conversions is encoder-decoder (ENDEC), whereas CODEC represents the software components. However, usage is not restricted to a single kind of gear or software.
Difference between Encoder and Decoder
| Encoder | Decoder |
| A digital circuit known as an encoder carries out a decoder’s reverse function. There are n output lines and 2n input lines in an encoder. | A decoder is a closed loop system that transforms binary data from n input lines to up to 2n distinct output lines at most. |
| An encoder generates the binary code that corresponds to the input triggered. | A decoder receives a series of binary inputs and only activates the output that matches the number of the input. |
| The Octal to Binary encoder is an illustration of an encoder. | A decoder provides an active output signal to provide feedback to the coded data bits. |
| The output of the encoder, which is sent to the decoder, consists of coded data bits. | A decoder is challenging because it has to comprehend the encoder’s coding scheme. |
| An encoder is a very simple device. | On the receiving side, the decoder circuit is configured. |
