The Difference between Encoders and Decoders
Encoders and decoders are two important components in communication systems and play a crucial role in transmitting and receiving information. These two components are often used interchangeably, but there are clear differences between encoders and decoders.
What is an Encoder?
An encoder is a device that converts a signal from one form to another. It is used to take an input signal and transform it into a digital signal that can be transmitted over a network. Encoders are often used in video compression systems, where the video signal is transformed into a digital signal for transmission.
What is a Decoder?
A decoder is a device that converts a digital signal back into an analog signal. It is used to receive a digital signal and transform it into a signal that can be interpreted by the recipient. Decoders are often used in video compression systems, where the digital signal is transformed back into an analog signal for display on a screen.
Main Differences between Encoder and Decoder
| Encoder | Decoder |
| It converts message signal into binary coded decimal BCD. | It converts binary coded decimal BCD into the original message signal. |
| It has ‘2n’ number of inputs. | It has ‘n’ number of inputs. |
| It has ‘n’ number of outputs. | It has ‘2n‘ number of outputs. |
| It takes the original message signal as input. | It takes encoded BCD signal as input. |
| Its output is a BCD signal. | Its output is the original message signal. |
| It is implemented using only OR gates. | It is implemented using NOT and AND gates. |
| It has a very simple operation. | It has a little complex operation. |
| It has an invalid input state when two or more than two inputs are high. | It does not have an invalid input state. |
| It is installed at the transmitting end | It is installed at the receiving end. |
| It is used for encoding data of emails, videos, messages, calls, etc. | It is used to decode the received encoded data in microprocessor etc. |
Key Differences
The key difference between encoders and decoders is the direction of the signal transformation. Encoders transform signals from analog to digital, while decoders transform signals from digital to analog.
Another difference is that encoders are used in the transmission of signals, while decoders are used in the reception of signals. This means that encoders are responsible for sending the signal, while decoders are responsible for receiving the signal and interpreting it.
Conclusion
Encoders and decoders are two essential components in communication systems, and both play a crucial role in the transmission and reception of information. While encoders are responsible for converting signals from analog to digital for transmission, decoders are responsible for converting digital signals back into analog signals for interpretation.
