Difference between revisions of "Advanced Audio Coding"

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(→‎AAC+: Typos)
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[[Category: MDCT Audio Codecs]]
[[Category: MDCT Audio Codecs]]
[[Category: Multichannel Audio Codecs]]
[[Category: Multichannel Audio Codecs]]
[[Category: Formats missing in FFmpeg]]

Revision as of 03:44, 2 September 2008

  • FOURCCS: ????
  • Company: ISO

Specification and reference source links. http://www.3gpp.org/ftp/specs/html-info/26-series.htm ftp://ftp.tnt.uni-hannover.de/pub/MPEG/audio/mpeg4/

Intel has source for its IPP based AAC decoder: http://www.intel.com/cd/software/products/asmo-na/eng/perflib/ipp/219611.htm?prn=y

Real Networks has source for its Helix AAC fixedpoint decoder here: https://datatype.helixcommunity.org/2005/aacfixptdec

Usually stored in an MP4 container.

See also Understanding AAC.



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

GAIN headers

See http://mp3gain.sourceforge.net and MP3 GAIN header.