codec.
A device or program capable of performing transformations on a data stream or signal.
Meaning & usage
A device or program capable of performing transformations on a data stream or signal.
Audio and video codecs are important in making multimedia files small enough to distribute and simple to play back.
A media coding format.
H.264 and AV1 are examples of video codecs.
Where this word comes from
Syllabic abbreviation of coder decoder, probably in imitation of how modem was formed.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.