Coding Technologies

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Coding Technologies
TypeAktiebolag (Swedish corporation)
IndustryAudio coding
Founded1997 (1997) in Stockholm, Sweden
FounderLars Liljeryd[1]
DefunctNovember 8, 2007 (2007-11-08)
FateAcquired by Dolby Laboratories
Key people
Lars Liljeryd, Kristofer Kjörling, Martin Dietz [1][2]
Productsmp3PRO, aacPlus
SubsidiariesCoding Technologies GmbH (Germany)

Coding Technologies AB was a Swedish technology company that pioneered the use of spectral band replication in Advanced Audio Coding. It is a major provider of audio compression technologies for digital broadcasting.[3]


The company was founded in Stockholm, Sweden, in 1997 by Lars Liljeryd.[4] A German subsidiary was formed in 2000 as Coding Technologies GmbH (later renamed Dolby Germany GmbH) with support from the research organization Fraunhofer IIS.[1] The company also had offices in the United States and China.

Coding Technologies was acquired by Dolby Laboratories in 2007 for $250 million in cash.[5] Since then it was renamed to Dolby International AB.


Coding Technologies’ MPEG-2 AAC-derived codec, called aacPlus, was published in 2001 and submitted to the MPEG for standardization. The codec would become the MPEG-4 High-Efficiency AAC (HE-AAC) profile in 2003. XM Satellite Radio used aacPlus for its streams.[6] aacPlus with Parametric stereo, called enhanced aacPlus, would become MPEG-4 HE-AACv2. The technology was adopted by Qualcomm in 2004, allowing it to be integrated into wireless handsets.[7]

Lars Liljeryd, Kristofer Kjörling, and Martin Dietz received the IEEE Masaru Ibuka Consumer Electronics Award in 2013 for their work at Coding Technologies, developing and marketing SBR-based audio coding.[2][8]

External links[edit]


  1. ^ a b c "Coding Technologies' Digital Revolution". Fraunhofer Venture. Retrieved 7 July 2015.
  2. ^ a b "IEEE Masaru Ibuka Consumer Electronics Award". Retrieved 7 July 2015.
  3. ^ "Orban and Coding Technologies bring MPEG-4 aacPlus audio to Windows Media Players". EE Times. April 24, 2006. Retrieved April 5, 2023.
  4. ^ Office, European Patent. "Lars Liljeryd (Sweden)". Retrieved 2023-04-04.
  5. ^ "Dolby Laboratories to Acquire Coding Technologies". 8 November 2007. Archived from the original on 12 June 2010. Retrieved 25 May 2015.
  6. ^ "XM Drops PAC for CT-aacPlus". Radio. 14 May 2002. Archived from the original on 26 May 2015. Retrieved 25 May 2015.
  7. ^ RadioWorld (2004-03-22). "Qualcomm Chooses Coding Technologies' aacPlus". Radio World. Retrieved 2023-04-04.
  8. ^ "Interview with Martin Dietz, Kristofer Kjörling, and Lars Liljeryd". YouTube. Retrieved 7 July 2015.