What is codec?

Codec

A codec is a device or computer program capable of encoding or decoding a digital data stream or signal. The word codec is a portmanteau of "coder-decoder" or, less commonly, "compressor-decompressor". A codec (the program) should not be confused with a coding or compression format or standard – a format is a document (the standard), a way of storing data, while a codec is a program (an implementation) which can read or write such files. In practice, however, "codec" is sometimes used loosely to refer to formats.

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Some articles on codec:

Compression Quality - Media Codecs
... Codecs are often designed to emphasize certain aspects of the media, or their use, to be encoded ... Audio codecs for cell phones need to have very low latency between source encoding and playback ... In contrast, audio codecs for recording or broadcast can use high-latency audio compression techniques to achieve higher fidelity at a lower bit-rate ...
CELT - History
... led to Jean-Marc Valin′s interest in a particularly low-latency codec ... In May 2009, a draft of RTP payload format for the CELT Codec was published ... Shortly after the advent of the CELT/SILK hybrid codec Opus (formerly known as Harmony), the development of CELT as a separate project was halted ...
MSU Lossless Video Codec - Description
... MSU Lossless Video Codec is available as a Video for Windows codec ... The codec is available free of charge for non-commercial use ... The source code of codec is unavailable ...
Long-term Predicted Excitation Coding
... Long-term Predicted Excitation Coding (LPEC) is a codec developed by Sony for voice recording ... It is the standard codec in several Sony digital voice recorders ... The codec is proprietary and no developer details are available as of early 2007 ...
Apple Intermediate Codec
... The Apple Intermediate Codec is a high-quality 8-bit 420 video codec used mainly as a less processor-intensive way of working with long-GOP MPEG-2 footage such as HDV ... The Apple Intermediate Codec abbreviated AIC (by users, Apple Engineers don't use the abbreviation) is designed by Apple Inc ... Unlike native MPEG-2 based HDV - and similar to the standard-definition DV codec - the Apple Intermediate Codec does not use temporal compression, enabling every frame to be decoded immediately without ...