companding

(redirected from Compansion)

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 ?
Fulfillment of financial responsibility during university academic life causes lot of stress among Socio-economic 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.
The technique that we have developed, called sentence compansion [8, 25], takes a compressed message and expands that message into a well-formed sentence.
In this case compansion may function more as a language assist.
Thus, the sentence compansion system employs a semantic parser to generate a meaningful semantic representation which captures how the input content words fit together.
The current compansion model is implemented on a Sun SPARC Workstation using Common Lisp.
While the theoretical evaluation of the sentence compansion technique shows great promise, its general utility must be evaluated with respect to individual user populations with specific physical interfaces.
Two elements of the dbx system are key to satisfying this constraint: wideband compansion and spectral compansion.
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.
When the police party headed by a Deputy Superintendent of Police, reached the spot, the processionists resorted to firing upon them, injuring four of their compansions, namely, Navid alias Nazir Tahir Ahad, Babar Shjafi and Abid.
Lhasa Apsos were originally bred as compansions for Tibetan monks, who believed they were reincarnated lions.
I have fished every month for 10 years with two compansions in Peter Tyman's boat, a 30-footer based at Ramsgate, Kent," Keith told The SP