companding

(redirected from Compansion)
Also found in: Wikipedia.

companding

[kəm′pand·iŋ]
(electronics)
A process in which compression is followed by expansion; often used for noise reduction in equipment, in which case compression is applied before noise exposure and expansion after exposure.

companding

(1) In the analog world, a method for improving audio reproduction by altering the dynamic range of the signals. On outgoing transmission, it raises the amplitude of weak signals and lowers the amplitude of strong signals. On incoming transmission, it restores the signal to its original form. Such techniques are used in dbx and Dolby noise reduction, AM, FM and SSB radio as well as in voice and musical instrument amplification to reduce feedback. See codec.

(2) In the digital world, a compression technique used in pulse code modulation (PCM). It reduces the number of bits used to represent digital voice samples in the loudest parts of the conversation. See mu-Law, A-Law and codec.
References in periodicals archive ?
Event Annie's Book Stop of Worcester is hosting Matt Herring of Secret Identity Podcast, who will share his Whovian fan guide, "The Unofficial Doctor Who Compansion,'' 3-5 p.
Two elements of the dbx system are key to satisfying this constraint: wideband compansion and spectral compansion.
Event Annie's Book Stop is hosting Matt Herring of Secret Identity Podcast, who will share his Whovian fan guide, "The Unofficial Doctor Who Compansion,'' 3-5 p.
Lhasa Apsos were originally bred as compansions for Tibetan monks, who believed they were reincarnated lions.