codec

noun
  1. A codec is a device or software that is used to compress or decompress digital media files, such as audio or video, to facilitate storage or transmission. noun
    The video file wouldn't play because the necessary codec was not installed on the computer.
    She downloaded a new codec to improve the quality of her video streaming.
  2. In telecommunications, a codec is a device or program that encodes or decodes a digital data stream or signal. noun
    The call quality improved after the telecommunications company upgraded their codec.
    The codec converts analog signals into digital data for transmission over the internet.