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Audio codec

Index Audio codec

An audio codec is a codec (a device or computer program capable of encoding or decoding a digital data stream) that encodes or decodes audio. [1]

114 relations: AC3Filter, Adaptive Transform Acoustic Coding, AllOfMP3, Altacast, Analog-to-digital converter, Annodex, Apple Lossless, AptX, ATSC standards, Audicom, Audio coding format, Audio converter, Audio file format, Baudline, Bink Video, Bitzi, CELT, Cinavia, Codec, Codec (disambiguation), Combined Community Codec Pack, Comparison of audio coding formats, Comparison of high definition optical disc formats, Cosmic Circuits, Decoder, Dell Dimension, Dell Latitude, Dolphin Integration, DVD Flick, ECMA-407, Encoder, Enhanced Audio Codec, FAAC, Flip4Mac, G.718, G.722.1, General-purpose input/output, Glossary of digital audio, H.323, Helmut Schmidt University, Hi-MD, Integrated Performance Primitives, Intel X99, Internet Low Bitrate Codec, Internet radio, Internet Speech Audio Codec, IPad, K-Lite Codec Pack, Karlheinz Brandenburg, KMPlayer, ..., Lapped transform, LDAC (codec), Linear Acoustic, List of audio conversion software, List of open-source codecs, Machinae Supremacy, MainConcept, Markus Moenig, Masking threshold, Master Quality Authenticated, Meridian Audio, Moving Picture Experts Group, MPEG Audio Decoder, MPEG-4 Part 3, MPH (ATSC), Nintendo 3DS system software, Nokia C6-01, Nokia C7-00, Nook Tablet, Nullsoft, OMS Video, Open Interface North America, Open standard, OpenMAX, Opus (audio format), PlayStation 3 technical specifications, Plex (software), Prismizer, Qualcomm, RealAudio, Realtek, Rockchip, Samsung Galaxy Express, Samsung Galaxy Express 2, Samsung Galaxy S III, SBC (codec), Selectrix, Serial Peripheral Interface, Shorten (file format), SILK, Siren (codec), Sound card, Sound quality, Southbridge (computing), Speech coding, Speex, Talview, Television in France, Tieline, TTA (codec), Unified Speech and Audio Coding, Universal code (data compression), Vocoder, Voice over IP, VoIP phone, Vorbis, WALTR, WavPack, WebRTC, WebRTC Gateway, Windows Media Audio, Windows Media Encoder, Wolfson Microelectronics, Yepp U Series. Expand index (64 more) »


AC3Filter is a free DirectShow filter for real time audio decoding and processing.

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Adaptive Transform Acoustic Coding

Adaptive Transform Acoustic Coding (ATRAC) is a family of proprietary audio compression algorithms developed by Sony.

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AllOfMP3, MP3Sparks and MemphisMembers are brands of online music store that were operated by Mediaservices, Inc., a company founded in 2000 in Moscow, Russia.

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Altacast (formerly known as Edcast and Oddcast) is a free and open-source audio encoder that can be used to create Internet streams of varying types.

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Analog-to-digital converter

In electronics, an analog-to-digital converter (ADC, A/D, or A-to-D) is a system that converts an analog signal, such as a sound picked up by a microphone or light entering a digital camera, into a digital signal.

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Annodex is a digital media format developed by CSIRO to provide annotation and indexing of continuous media, such as audio and video.

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Apple Lossless

Apple Lossless, also known as Apple Lossless Audio Codec (ALAC), or Apple Lossless Encoder (ALE), is an audio coding format, and its reference audio codec implementation, developed by Apple Inc. for lossless data compression of digital music.

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In digital audio data reduction technology, aptX (formerly apt-X) is a family of proprietary audio codec compression algorithms currently owned by Qualcomm.

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ATSC standards

Advanced Television Systems Committee (ATSC) standards are a set of standards for digital television transmission over terrestrial, cable, and satellite networks.

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Audicom (from “Audio en computadora”, Spanish for “Audio in computer”), released in 1989, was the world's first PC-based broadcast automation system to use audio data compression technology based on psychoacoustics.

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Audio coding format

An audio coding format (or sometimes audio compression format) is a content representation format for storage or transmission of digital audio (such as in digital television, digital radio and in audio and video files).

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Audio converter

An audio converter is a device or software that converts an audio signal from one format to another.

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Audio file format

An audio file format is a file format for storing digital audio data on a computer system.

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The baudline time-frequency browser is a signal analysis tool designed for scientific visualization.

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Bink Video

Bink Video is a proprietary video file format (extension.bik) developed by RAD Game Tools, and primarily used for full-motion video sequences in video games.

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Bitzi was a website, operating from 2001 to 2013, where volunteers shared reports about any kind of digital file, with identifying metadata, commentary, and other ratings.

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Constrained Energy Lapped Transform (CELT) is an open, royalty-free lossy audio compression format and a free software codec with especially low algorithmic delay for use in low-latency audio communication.

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Cinavia, originally called Verance Copy Management System for Audiovisual Content (VCMS/AV), is an analog watermarking and steganography system under development by Verance since 1999, and released in 2010.

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A codec is a device or computer program for encoding or decoding a digital data stream or signal.

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Codec (disambiguation)

Codec may mean.

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Combined Community Codec Pack

The Combined Community Codec Pack, more commonly referred to as the CCCP, is a collected archive of codecs (video compression filters) packed for Microsoft Windows, designed originally for the playback of anime fansubs.

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Comparison of audio coding formats

The following tables compare general and technical information for a variety of audio coding formats.

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Comparison of high definition optical disc formats

This article compares the technical specifications of multiple high definition formats, including HD DVD and Blu-ray Disc; two mutually incompatible, high definition optical disc formats that, beginning in 2006, attempted to improve upon and eventually replace the DVD standard.

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Cosmic Circuits

Cosmic Circuits was an India based company that developed, licensed and marketed differentiated analog and mixed signal Semiconductor IP cores for use on System-on-Chips.

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Decoder may refer to.

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Dell Dimension

The Dell Dimension series was a line of home and business desktop computers manufactured by Dell.

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Dell Latitude

Latitude is Dell's business laptop brand, designed and manufactured mainly by Compal and Quanta.

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Dolphin Integration

Dolphin Integration is a French Corporation headquartered at Meylan near Grenoble, France, since 1985.

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DVD Flick

DVD Flick is an open source DVD authoring application for Windows developed by Dennis Meuwissen and released under the GNU General Public License.

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ECMA-407 is the world’s first approved international 3D audio standard for the unrestricted delivery of channel-based, object-based and scene-based signals up to NHK 22.2 developed by Ecma TC32-TG22 in close cooperation with France Télévisions, Radio France, École Polytechnique Fédérale de Lausanne and McGill University in Montreal.

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An encoder is a device, circuit, transducer, software program, algorithm or person that converts information from one format or code to another, for the purposes of standardization, speed or compression.

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Enhanced Audio Codec

Enhanced Audio Codec is an audio codec developed and owned by Beijing E-World, that uses a unique perceptual model, spectral band replication, to compress the audio signal by utilizing the redundancy as well as the relevancy.

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FAAC or Freeware Advanced Audio Coder is a software project which includes the AAC encoder FAAC and decoder FAAD2.

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Flip4Mac from Telestream, Inc.

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G.718 is an ITU-T recommendation embedded scalable speech and audio codec providing high quality narrowband (250 Hz to 3.5 kHz) speech over the lower bit rates and high quality wideband (50 Hz to 7 kHz) speech over the complete range of bit rates.

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G.722.1 is a licensed royalty-free ITU-T standard audio codec providing high quality, moderate bit rate (24 and 32 kbit/s) wideband (50 Hz – 7 kHz audio bandwidth, 16 ksps (kilo-samples per second) audio coding. It is a partial implementation of Siren 7 audio coding format (which offers bit rates 16, 24, 32 kbit/s) developed by PictureTel Corp. (now Polycom, Inc.). Its official name is Low-complexity coding at 24 and 32 kbit/s for hands-free operation in systems with low frame loss. G.722.1 Annex C (or G.722.1C) is a low-complexity extension mode to G.722.1, which doubles the algorithm to permit 14 kHz audio bandwidth using a 32 kHz audio sample rate, at 24, 32, and 48 kbit/s. It is included in the official ITU-T Recommendation G.722.1. The name of this annex is Annex C – 14 kHz mode at 24, 32, and 48 kbit/s. It is an implementation of the mono version of Polycom's Siren 14 audio coding format. G.722.1 is the successor to PT716plus developed by PictureTel Corp. (now Polycom, Inc.), which has been used in videoconferencing systems for many years. As ITU-T Recommendation G.722.1, it was approved on September 30, 1999 after a four-year selection process involving extensive testing. G.722.1/Annex C was approved by ITU-T on May 14, 2005. G.722.1 is a transform-based compressor that is optimized for both speech and music. The G.722.1 algorithm is based on lapped transform technology, using a Modulated Lapped Transform (MLT). The computational complexity is quite low (5.5 floating-point MIPS) for an efficient high-quality compressor, and the algorithmic delay end-to-end is 40 ms. The numbering of the wideband ITU audio codecs is sometimes confusing. There are three principal codecs, which are unrelated, but all carrying the G.722 label. G.722 is the original 7 kHz codec, using ADPCM and operating at 48–64 kbit/s. G.722.1, another 7 kHz codec, operates at half the data rate while delivering comparable or better quality than G.722, but is a transform-based codec. G.722.1 Annex C is very similar to G.722.1, but provides twice the audio bandwidth, 14 kHz. And G.722.2, which operates on wideband speech and delivers very low bitrates, is an ACELP-based algorithm.

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General-purpose input/output

A general-purpose input/output (GPIO) is an uncommitted digital signal pin on an integrated circuit or electronic circuit board whose behavior—including whether it acts an input or output—is controllable by the user at run time.

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Glossary of digital audio

No description.

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H.323 is a recommendation from the ITU Telecommunication Standardization Sector (ITU-T) that defines the protocols to provide audio-visual communication sessions on any packet network.

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Helmut Schmidt University

The Helmut Schmidt University (Helmut-Schmidt-Universität), located in Hamburg, Germany, is a German military educational establishment that was founded in 1973 at the initiative of the then-Federal Minister of Defence, Helmut Schmidt.

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In January 2004, Sony announced the Hi-MD media storage format as a further development of the MiniDisc format.

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Integrated Performance Primitives

Intel Integrated Performance Primitives (Intel IPP) is a multi-threaded software library of functions for multimedia and data processing applications, produced by Intel.

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Intel X99

Intel X99, codenamed "Wellsburg", is a Platform Controller Hub (PCH) designed and manufactured by Intel, targeted at the high-end desktop (HEDT) and enthusiast segments of the Intel product lineup.

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Internet Low Bitrate Codec

Internet Low Bitrate Codec (iLBC) is an open source royalty-free narrowband speech audio coding format codec and reference implementation, developed by Global IP Solutions (GIPS) formerly Global IP Sound (acquired by Google Inc in 2011).

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Internet radio

Internet radio (also web radio, net radio, streaming radio, e-radio, IP radio, online radio) is a digital audio service transmitted via the Internet.

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Internet Speech Audio Codec

internet Speech Audio Codec (iSAC) is a wideband speech codec, developed by Global IP Solutions (GIPS) (acquired by Google Inc in 2011).

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iPad is a line of tablet computers designed, developed and marketed by Apple Inc., which run the iOS mobile operating system.

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K-Lite Codec Pack

The K-Lite Codec Pack is a collection of audio and video codecs for Microsoft Windows that enables an operating system and its software to play various audio and video formats generally not supported by the operating system itself.

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Karlheinz Brandenburg

Karlheinz Brandenburg (born 20 June 1954, in Erlangen) is a German electrical engineer and mathematician.

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K-Multimedia Player (commonly known as The KMPlayer, KMPlayer or KMP) is a media player for Windows which can play a large number of formats including VCD, DVD, AVI, MKV, Ogg, OGM, 3GP, MPEG-1/2/4, AAC, WMA 7, 8, WMV, RealMedia, FLV and QuickTime.

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Lapped transform

In signal processing, a lapped transform is a type of linear discrete block transformation where the basis functions of the transformation overlap the block boundaries, yet the number of coefficients overall resulting from a series of overlapping block transforms remains the same as if a non-overlapping block transform had been used.

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LDAC (codec)

LDAC is an audio coding technology developed by Sony, which allows streaming audio over Bluetooth connections up to 990 kbit/s at 24bit/96khz (also called High-resolution audio).

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Linear Acoustic

Linear Acoustic is an American company based in Lancaster, Pennsylvania that develops technology and manufacturers equipment used by television stations, cable television and satellite television services providers, post-production facilities and other content services providers to control, measure, manage and monitor multi-channel digital audio.

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List of audio conversion software

An audio conversion app (also known as an audio converter) transcodes one audio file format into another; for example, from FLAC into MP3.

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List of open-source codecs

This is a listing of open-source implementations of media formats—usually called codecs.

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Machinae Supremacy

Machinae Supremacy are a Swedish band that combines modern heavy metal, power metal and alternative rock with chiptunes.

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MainConcept GmbH is a software company founded in Germany by Markus Moenig and Thomas Zabel.

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Markus Moenig

Markus Moenig (Markus Mönig), is a German Entrepreneur and Computer scientist.

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Masking threshold

The masking threshold is the sound pressure level of a sound needed to make the sound audible in the presence of another noise called a "masker".

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Master Quality Authenticated

Master Quality Authenticated (MQA) is an audio codec using lossy compression and a form of file fingerprinting, intended for high fidelity digital audio internet streaming and file download.

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Meridian Audio

Meridian Audio is an English manufacturer of high-performance, high-fidelity audio and video components and systems founded in 1977 by Bob Stuart and Allen Boothroyd.

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Moving Picture Experts Group

The Moving Picture Experts Group (MPEG) is a working group of authorities that was formed by ISO and IEC to set standards for audio and video compression and transmission.

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MPEG Audio Decoder

MPEG Audio Decoder (MAD) is a GPL library for decoding files that have been encoded with an MPEG audio codec.

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MPEG-4 Part 3

MPEG-4 Part 3 or MPEG-4 Audio (formally ISO/IEC 14496-3) is the third part of the ISO/IEC MPEG-4 international standard developed by Moving Picture Experts Group.

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MPH (Mobile-Pedestrian-Handheld) inband mobile digital television is a technology jointly developed by Harris Corporation, LG Electronics, Inc.

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Nintendo 3DS system software

The Nintendo 3DS system software is a set of updatable firmware versions and software frontend on the Nintendo 3DS family of video game consoles.

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Nokia C6-01

The Nokia C6-01 is a Symbian^3 smartphone from the Nokia Cseries.

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Nokia C7-00

The Nokia C7-00 is a Nokia Belle (update made available on 7 February 2012) smartphone from the Nokia Cseries.

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Nook Tablet

The Nook Tablet (sometimes styled NOOK Tablet) is a tablet e-reader/media player that was produced and marketed by Barnes & Noble.

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Nullsoft, Inc. was a software house founded in Sedona, Arizona in 1997 by Justin Frankel.

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OMS Video

OMS Video is an open, royalty-free video compression specification under development by Sun Microsystems's Open Media Commons as part of the Open Media Stack.

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Open Interface North America

Open Interface North America (OINA) is a privately owned embedded Bluetooth software provider based in Seattle, Washington and was incorporated in 2000 as a division of the Japanese company Open Interface, Inc., which had formed in 1992.

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Open standard

An open standard is a standard that is publicly available and has various rights to use associated with it, and may also have various properties of how it was designed (e.g. open process).

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OpenMAX (Open Media Acceleration), often shortened as "OMX", is a non-proprietary and royalty-free cross-platform set of C-language programming interfaces.

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Opus (audio format)

Opus is a lossy audio coding format developed by the Xiph.Org Foundation and standardized by the Internet Engineering Task Force, designed to efficiently code speech and general audio in a single format, while remaining low-latency enough for real-time interactive communication and low-complexity enough for low-end embedded processors.

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PlayStation 3 technical specifications

The PlayStation 3 technical specifications describe the various components of the PlayStation 3 (PS3) video game console.

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Plex (software)

Plex is a client-server media player system and software suite comprising two main components.

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Prismizer is an audio effect using multiple different audio codecs that sounds similar to a vocoder in that it combines pitch and frequency characteristics from multiple sources (most frequently used on the human voice) but to a different, choral effect.

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Qualcomm is an American multinational semiconductor and telecommunications equipment company that designs and markets wireless telecommunications products and services.

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RealAudio is a proprietary audio format developed by RealNetworks and first released in April 1995.

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Realtek Semiconductor Corp., is a fabless semiconductor company situated in the Hsinchu Science Park, Hsinchu, Taiwan.

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Rockchip (Fuzhou Rockchip Electronics Co., Ltd.) is a Chinese fabless semiconductor company based in Fuzhou, Fujian province.

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Samsung Galaxy Express

The Samsung Galaxy Express (GT-I8730) is a smartphone made by Samsung which was launched in March 2013 in India featuring a similar design to the Galaxy S Duos but with additional features such as 4G LTE, NFC.

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Samsung Galaxy Express 2

The Samsung Galaxy Express 2 (SM-G3815) is a smartphone made by Samsung which was launched in October 2013 featuring a similar design and specifications of the Samsung Galaxy S4 Mini but with a bigger 4.5 inch screen and different cameras.

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Samsung Galaxy S III

The Samsung Galaxy S III (or Galaxy S3) is a Android smartphone designed, developed, and marketed by Samsung Electronics.

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SBC (codec)

SBC, or low-complexity subband codec, is an audio subband codec specified by the Bluetooth Special Interest Group (SIG) for the Advanced Audio Distribution Profile (A2DP).

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Selectrix is a digital model train control system developed by German company Döhler & Haas for model railway manufacturer Trix in the early 1980s.

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Serial Peripheral Interface

The Serial Peripheral Interface (SPI) is a synchronous serial communication interface specification used for short distance communication, primarily in embedded systems.

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Shorten (file format)

Shorten (SHN) is a file format used for compressing audio data.

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SILK is an audio compression format and audio codec developed by Skype Limited.

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Siren (codec)

Siren is a family of patented, transform-based, wideband audio coding formats and their audio codec implementations developed and licensed by PictureTel Corporation (acquired by Polycom, Inc. in 2001).

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Sound card

A sound card (also known as an audio card) is an internal expansion card that provides input and output of audio signals to and from a computer under control of computer programs.

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Sound quality

Sound quality is typically an assessment of the accuracy, enjoyability, or intelligibility of audio output from an electronic device.

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Southbridge (computing)

The southbridge is one of the two chips in the core logic chipset on a personal computer (PC) motherboard, the other being the northbridge.

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Speech coding

Speech coding is an application of data compression of digital audio signals containing speech.

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Speex is an audio compression format specifically tuned for the reproduction of human speech and also a free software speech codec that may be used on VoIP applications and podcasts.

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Talview is an Indian HR technology company.

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Television in France

Television in France was introduced in 1931, when the first experimental broadcasts began.

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Tieline Technology has offices in Indianapolis in the United States (Tieline America LLC) and in Perth, Western Australia (Tieline Pty Ltd).

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TTA (codec)

True Audio (TTA) is a lossless compressor for multichannel 8, 16 and 24 bits audio data.

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Unified Speech and Audio Coding

Unified Speech and Audio Coding (USAC) is an audio compression format and codec for both music and speech or any mix of speech and audio using very low bit rates between 12 and 64 kbit/s.

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Universal code (data compression)

In data compression, a universal code for integers is a prefix code that maps the positive integers onto binary codewords, with the additional property that whatever the true probability distribution on integers, as long as the distribution is monotonic (i.e., p(i) ≥ p(i + 1) for all positive i), the expected lengths of the codewords are within a constant factor of the expected lengths that the optimal code for that probability distribution would have assigned.

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A vocoder (a portmanteau of voice encoder) is a category of voice codec that analyzes and synthesizes the human voice signal for audio data compression, multiplexing, voice encryption, voice transformation, etc.

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Voice over IP

Voice over Internet Protocol (also voice over IP, VoIP or IP telephony) is a methodology and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet.

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VoIP phone

A VoIP phone or IP phone uses voice over IP technologies for placing and transmitting telephone calls over an IP network, such as the Internet, instead of the traditional public switched telephone network (PSTN).

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Vorbis is a free and open-source software project headed by the Xiph.Org Foundation.

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WALTR direct converter is proprietary software developed by Softorino for converting and transferring music and video files directly onto Apple iOS devices (iPhone, iPad and iPod touch).

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WavPack is a free and open-source lossless audio compression format.

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WebRTC (Web Real-Time Communication) is a free, open-source project that provides web browsers and mobile applications with real-time communication (RTC) via simple application programming interfaces (APIs).

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WebRTC Gateway

WebRTC Gateway connects between WebRTC and an established VoIP technology such as SIP.

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Windows Media Audio

Windows Media Audio (WMA) is the name of a series of audio codecs and their corresponding audio coding formats developed by Microsoft.

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Windows Media Encoder

Windows Media Encoder is a discontinued, freeware media encoder developed by Microsoft which enables content developers to convert or capture both live and prerecorded audio, video, and computer screen images to Windows Media formats for live and on-demand delivery.

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Wolfson Microelectronics

Wolfson Microelectronics plc was a multinational microelectronics and fabless semiconductor company headquartered in Edinburgh, Scotland.

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Yepp U Series

The YEPP U series is a famous line of USB key MP3 players made by Samsung and introduced in 2005 with the YP-U1.

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Audio Codec, Audio Decoder, Audio Encoder, Audio codecs, Audio coding, Audio decoder, Audio encoder.


[1] https://en.wikipedia.org/wiki/Audio_codec

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