encoder decoder

An encoder is a device or algorithm that converts a specific input signal or data into a digital format that can be transmitted or stored easily. It typically takes an analog signal or data and transforms it into a binary code that can be interpreted by digital systems.

A decoder, on the other hand, performs the opposite function of an encoder. It takes the digital signal or data that has been encoded and converts it back into its original form, such as an analog signal or text.

In communication systems, encoders and decoders are used to transmit and receive information. For example, in video compression, an encoder compresses a video signal into a smaller size for transmission, while a decoder decompresses the signal back into its original form for viewing.

In computer science, encoders and decoders are used to convert data between different formats, such as ASCII to binary or vice versa. They are also used in encryption and decryption algorithms to encode and decode sensitive information for secure transmission.