The Ultra Low Delay Audio Coder (ULD) is a development of the Fraunhofer Institute for Digital Media Technology (IDMT), which is headed by one of the fathers of
MP3
MP3 (formally MPEG-1 Audio Layer III or MPEG-2 Audio Layer III) is a coding format for digital audio developed largely by the Fraunhofer Society in Germany under the lead of Karlheinz Brandenburg. It was designed to greatly reduce the amount ...
,
Karlheinz Brandenburg
Karlheinz Brandenburg (born 20 June 1954) is a German electrical engineer and mathematician. Together with Ernst Eberlein, Heinz Gerhäuser (former Institutes Director of Fraunhofer IIS), Bernhard Grill, Jürgen Herre and Harald Popp (all Fraunh ...
, and of the Fraunhofer Institute for Integrated Circuits (IIS). The ULD is a
lossy
In information technology, lossy compression or irreversible compression is the class of data compression methods that uses inexact approximations and partial data discarding to represent the content. These techniques are used to reduce data size ...
audio data compression
In information theory, data compression, source coding, or bit-rate reduction is the process of encoding information using fewer bits than the original representation. Any particular compression is either lossy or lossless. Lossless compression ...
scheme that only introduces a very small amount of delay into the audio signal compared to commonly known audio coders like
MP3
MP3 (formally MPEG-1 Audio Layer III or MPEG-2 Audio Layer III) is a coding format for digital audio developed largely by the Fraunhofer Society in Germany under the lead of Karlheinz Brandenburg. It was designed to greatly reduce the amount ...
or
AAC
AAC may refer to:
Aviation
* Advanced Aircraft, a company from Carlsbad, California
* Airborne aircraft carrier, a type of aircraft
* Alaskan Air Command, a radar network
* American Aeronautical Corporation, a company from Port Washington, New ...
. This property is especially useful for communication purposes (like voice calls, video conferencing or making music via the internet), for which not only high compression ratios are necessary, but low latency is critical, too.
External links
Homepage of the ULD CodecPresentation on low delay audio codecsULD Whitepaper
{{Webarchive, url=https://web.archive.org/web/20140811184002/https://files.nyu.edu/dkc232/public/Fraunhofer_IIS_ULD16_tcm97-67525.pdf , date=2014-08-11
Audio codecs