Advanced Audio Coding

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  • FOURCCS: ????
  • Company: ISO

Specification and reference source links.

Intel has source for its IPP based AAC decoder:

Real Networks has source for its Helix AAC fixedpoint decoder here:

Usually stored in an MP4 container.

See also Understanding AAC.



AACPlus (a.k.a. AAC+) is HE-AAC + SBR (Spectral Band Replication) and aacPlus v2 means HE-AAC + SBR (Spectral Band Replication) + PS (Parametric Stereo). Standard HE-AAC decoders can decode aacPlus encoded files/streams but without SBR and PS you do not get the full quality.

GAIN headers

See and MP3 GAIN header.