An encoder is a device or software that converts information from one format to another. This process is essential in various fields, such as telecommunications and data storage, where it helps to compress or encrypt data for efficient transmission or security. Encoders can be found in audio and video applications, where they transform raw signals into formats suitable for playback or streaming. In the context of digital media, encoders often work alongside decoders, which reverse the encoding process. For example, in video streaming, an encoder compresses the video file, while a decoder decompresses it for viewing. This interaction ensures that data is transmitted efficiently and can be accessed easily by users.