CODEC

hardware and software for compressing and decompressing larve volumes of data.  The term generally applies to large multimedia files.

(1) Short for compressor/decompressor, a codec is any technology for compressing and decompressing data. Codecs can be implemented in software, hardware, or a combination of both. Some popular codecs for computer video include MPEG, Indeo and Cinepak.(2) In telecommunications, a device that encodes or decodes a signal. For example, telephone companies use codecs to convert binary signals transmitted on their digital networks to analog signals converted on their analog networks.(3) The translation of a binary value into a voltage that can be transmitted over a wire.

Coder/Decoder,device or program to convert digital signals to and from analog.