codec

IPA/ˈkəʊdek/
IPA/ˈkəʊdek/

codec — noun

  • codecsingular
  • codecsplural

1. a piece of hardware or software that shrinks audio or video files so they can tr

1.nounC1
Definition

a piece of hardware or software that shrinks audio or video files so they can travel over the internet or sit in storage, then expands them again when someone wants to listen or watch.

Example

Tanvi installed a new video codec so her laptop could play the wedding footage smoothly.

install a codec — software-install collocation

Streaming services rely on efficient codecs to send high-quality video over slow home connections.

subject is a streaming service — typical real-world use

Common collocations
  • audio codec
  • video codec
  • install a codec
  • lossless codec
  • open-source codec
  • missing codec
Synonyms
  • encoder

    covers only the compression half of what a codec does

  • compressor

    broader; can refer to any data-shrinking tool, not specifically audio or video

Grammar Patterns

a codec for [media type]

audio/video codec

Usage Note

Almost always countable and modified by the media type it handles (audio codec, video codec) or by a quality descriptor (lossless codec, high-efficiency codec). Frequently appears as the object of install, support, or use.

Common Mistakes

I downloaded the codec software for write a music file.
I downloaded the codec software to write a music file.
use to-infinitive of purpose after a verb of action, not 'for + bare verb'.
My player does not have any codec to read this format.
My player does not have a codec that can read this format.
pair 'codec' with a relative clause when describing what it does; 'any codec to read' sounds unnatural.

Word family

Synonym discussion

Sense: noun/1

A codec handles both directions of the process: it shrinks (encodes) media for transmission or storage and expands (decodes) it again on playback. An encoder only performs the shrinking half, so a recording studio might use a standalone encoder to turn a master file into a smaller distribution copy, while a listener's app needs the matching codec to play it back. Compressor is broader and not media-specific; a file compressor like zip can squeeze any kind of data but cannot turn an MP4 back into watchable video. In casual tech writing, people sometimes call any of these tools a codec, but precise usage reserves the term for two-way audio or video tools.

codec ↗encodercompressor

Common collocations

Nouns

  • audio codec
  • video codec
  • codec support
  • codec pack

Phrases

  • install a codec
  • missing codec
  • open-source codec
  • lossless codec

Prepositions

  • codec for [a format]

Etymology

English

A twentieth-century technical blend, formed from coder + decoder. The term arose in mid-century telecommunications engineering to describe a single device that handled both directions of signal conversion, and was later borrowed wholesale into digital audio and video software.