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Glossary

AAC (Advanced Audio Coding)

AAC (Advanced Audio Coding) is a perceptual coding method used to compress digital audio files for efficient storage and transmission. Upon playback, the expanded files can provide sound quality nearly indistinguishable from the original sources. In principle, AAC is similar to MP3, but offers a number of advantages designed to improve audio quality. These include higher-efficiency compression, more channels, and better handling of audio frequencies above 16 kHz. The improved efficiency of AAC files makes AAC a particularly good choice for streaming audio over the Internet.

AAC, developed in part by Dolby Laboratories, is one of several audio coding systems defined by ISO MPEG standards, where it was first specified as MPEG-2 AAC, and then enhanced and extended within MPEG-4. Appleļæ½s popular iTunes® music service employs the AAC format.

If you are a building a product and would like a license to incorporate AAC technology, please visit our subsidiary, Via Licensing.