AAC is an audio compression scheme first standardized within MPEG in 1997. AAC was designed to provide high quality audio at lower bit-rates than previous MPEG audio compression formats. AAC was further refined through the MPEG-4 standardization process and has subsequently been enhanced with bandwidth extension technology yielding High Efficiency AAC (HE AAC), and with the addition of parametric stereo, resulting in High Efficiency AAC version 2 (HE AAC v2).
Via Licensing also offers joint patent licenses for three technologies that are complimentary to AAC; the Extended HE-AAC license (xHE-AAC), the MPEG Surround license and the MPEG-4 SLS license (as used in HD-AAC).
For additional information about Via’s AAC patent licensing program, please see our FAQ (Frequently Asked Questions) page.
A copy of the MPEG-4 Audio standard can be purchased from the ISO online store (search for “14496-3”).
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