Perceptual Audio CodingPerceptual Audio Coding
(PAC) is an algorithm
, like MPEG
standard, used to compress digital audio
by removing extraneous information not perceived by most people. It is used by Sirius for their DARS
service, and Ibiquity has been testing it for their IBOC digital radio
upgrade for FM
The term is sometimes used non-capitalized, to describe all lossy compression formats for audio.
Pac is also a handle sometimes used by rapper Tupac Shakur.
PAC is also an acronym for political action committee.