Coding Technologies AB was a Swedish technology company that pioneered the use of

spectral band replication Spectral band replication (SBR) is a technology to enhance audio or speech codecs, especially at low bit rates and is based on harmonic redundancy in the frequency domain. It can be combined with any audio compression codec: the codec itself tra ...

Advanced Audio Coding Advanced Audio Coding (AAC) is an audio coding standard for lossy digital audio compression. Designed to be the successor of the MP3 format, AAC generally achieves higher sound quality than MP3 encoders at the same bit rate. AAC has been sta ...

. Its

MPEG-2 MPEG-2 (a.k.a. H.222/H.262 as was defined by the ITU) is a standard for "the generic coding of moving pictures and associated audio information". It describes a combination of lossy video compression and lossy audio data compression methods, w ...

AAC-derived codec, called aacPlus, was published in 2001 and submitted to the

MPEG The Moving Picture Experts Group (MPEG) is an alliance of working groups established jointly by ISO and IEC that sets standards for media coding, including compression coding of audio, video, graphics, and genomic data; and transmission and fi ...

for standardization. The codec would become the

MPEG-4 MPEG-4 is a group of international standards for the compression of digital audio and visual data, multimedia systems, and file storage formats. It was originally introduced in late 1998 as a group of audio and video coding formats and related ...

High-Efficiency AAC (HE-AAC) profile in 2003.

XM Satellite Radio XM Satellite Radio (XM) was one of the three satellite radio (SDARS) and online radio services in the United States and Canada, operated by Sirius XM, Sirius XM Holdings. It provided pay-for-service radio, analogous to subscription cable televisi ...

used aacPlus for its streams. aacPlus with

Parametric stereo Parametric Stereo (abbreviated as PS) is an audio compression algorithm used as an audio coding format for digital audio. It is considered an Audio Object Type of MPEG-4 Part 3 (MPEG-4 Audio) that serves to enhance the coding efficiency of low ban ...

, called enhanced aacPlus, would become MPEG-4 HE-AACv2. Coding Technologies was acquired by

Dolby Laboratories Dolby Laboratories, Inc. (often shortened to Dolby Labs and known simply as Dolby) is an American company specializing in audio noise reduction, audio encoding/compression, spatial audio, and HDR imaging. Dolby licenses its technologies to ...

in 2007 for $250 million in cash. Since then it was renamed to ''Dolby International AB''. The company was founded in Stockholm, Sweden, in 1997 by Lars Liljeryd. A German subsidiary was formed in 2000 as Coding Technologies GmbH (later renamed Dolby Germany GmbH) with support from the research organization

Fraunhofer IIS The Fraunhofer Society (german: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., lit=Fraunhofer Society for the Advancement of Applied Research) is a German research organization with 76institutes spread throughout Germany ...

. The company also had offices in the

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 U.S. state, states, a Washington, D.C., federal district, five ma ...

and China. Lars Liljeryd, Kristofer Kjörling, and Martin Dietz received the

IEEE Masaru Ibuka Consumer Electronics Award The IEEE Masaru Ibuka Consumer Electronics Award is a Technical Field Award of the IEEE given for outstanding contributions to consumer electronics technology. It is named in honor of Masaru Ibuka, co-founder and honorary chairman of Sony Cor ...

in 2013 for their work at Coding Technologies, developing and marketing SBR-based audio coding.

External links

Coding Technologies website
(expired)

References

{{reflist Companies established in 1997 Technology companies of Sweden Digital audio