The following is a list of compression formats and related

codec A codec is a device or computer program that encodes or decodes a data stream or signal. ''Codec'' is a portmanteau of coder/decoder. In electronic communications, an endec is a device that acts as both an encoder and a decoder on a signal or da ...

Audio compression formats

Non-compression

Linear pulse-code modulation Pulse-code modulation (PCM) is a method used to digitally represent sampled analog signals. It is the standard form of digital audio in computers, compact discs, digital telephony and other digital audio applications. In a PCM stream, the am ...

(LPCM, generally only described as PCM) is the format for uncompressed audio in media files and it is also the standard for

CD-DA Compact Disc Digital Audio (CDDA or CD-DA), also known as Digital Audio Compact Disc or simply as Audio CD, is the standard format for audio compact discs. The standard is defined in the ''Red Book'', one of a series of Rainbow Books (named fo ...

; note that in computers, LPCM is usually stored in container formats such as

WAV Waveform Audio File Format (WAVE, or WAV due to its filename extension; pronounced "wave") is an audio file format standard, developed by IBM and Microsoft, for storing an audio bitstream on PCs. It is the main format used on Microsoft Wind ...

AIFF Audio Interchange File Format (AIFF) is an audio file format standard used for storing sound data for personal computers and other electronic audio devices. The format was developed by Apple Inc. in 1988 based on Electronic Arts' Interchange File ...

, or AU, or as

raw audio format A raw audio file is any file containing un-containerized and uncompressed audio. The data is stored as raw pulse-code modulation (PCM) values without any metadata header information (such as sampling rate, bit depth, endian, or number of cha ...

, although not technically necessary. **

FFmpeg FFmpeg is a free and open-source software project consisting of a suite of libraries and programs for handling video, audio, and other multimedia files and streams. At its core is the command-line ffmpeg tool itself, designed for processing of vid ...

Pulse-density modulation Pulse-density modulation, or PDM, is a form of modulation used to represent an analog signal with a binary signal. In a PDM signal, specific amplitude values are not encoded into codewords of pulses of different weight as they would be in pulse- ...

(PDM) **

Direct Stream Digital Direct Stream Digital (DSD) is a trademark used by Sony and Philips for their system for digitally encoding audio signals for the Super Audio CD (SACD). DSD uses pulse-density modulation encoding - a technology to store audio signals on digital ...

(DSD) is standard for

Super Audio CD Super Audio CD (SACD) is an optical disc format for audio storage introduced in 1999. It was developed jointly by Sony and Philips Electronics and intended to be the successor to the Compact Disc (CD) format. The SACD format allows multiple aud ...

*** foobar2000 Super Audio CD Decoder (based on MPEG-4 DST reference decoder) *** FFmpeg (based on dsd2pcm) *

Pulse-amplitude modulation Pulse-amplitude modulation (PAM) is a form of signal modulation where the message information is encoded in the amplitude of a series of signal pulses. It is an analog pulse modulation scheme in which the amplitudes of a train of carrier pulse ...

(PAM)

Lossless compression

* Actively used ** Most popular ***

Free Lossless Audio Codec FLAC (; Free Lossless Audio Codec) is an audio coding format for lossless compression of digital audio, developed by the Xiph.Org Foundation, and is also the name of the free software project producing the FLAC tools, the reference softwar ...

(FLAC) **** libFLAC **** FFmpeg ***

Apple Lossless Audio Codec The Apple Lossless Audio Codec (ALAC), also known as Apple Lossless, 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. ...

(ALAC) **** Apple QuickTime **** libalac **** FFmpeg ****

Apple Music Apple Music is a music, audio and video streaming service developed by Apple Inc. Users select music to stream to their device on-demand, or they can listen to existing playlists. The service also includes the Internet radio stations Apple M ...

***

Monkey's Audio Monkey's Audio is an algorithm and file format for lossless audio data compression. Lossless data compression does not discard data during the process of encoding, unlike lossy compression methods such as Advanced Audio Coding, MP3, Vorbis, a ...

(APE) **** Monkey's Audio SDK **** FFmpeg (decoder only) ***

OptimFROG OptimFROG is a proprietary lossless audio data compression codec developed by Florin Ghido. OptimFROG is optimized for very high compression (small file sizes) at the expense of encoding and decoding speed, and consistently measures among the hi ...

(OFR) *** Tom's verlustfreier Audiokompressor (TAK) **** TAK SDK **** FFmpeg (decoder only) ***

WavPack WavPack is a free and open-source lossless audio compression format and application implementing the format. It is unique in the way that it supports hybrid audio compression alongside normal compression which is similar to how FLAC works. I ...

(WV) **** libwavpack **** FFmpeg *** True Audio (TTA) **** libtta **** FFmpeg *** Windows Media Audio Lossless (WMAL) **** Windows Media Encoder **** FFmpeg (decoder only) ** Other ***

DTS-HD Master Audio DTS-HD Master Audio (DTS-HD MA; known as DTS++ before 2004) is a multi-channel, lossless audio codec developed by DTS as an extension of the lossy DTS Coherent Acoustics codec (DTS CA; usually itself referred to as just DTS). Rather than being ...

, also known as DTS++ and DCA XLL **** libdca (decoder only) **** FFmpeg (decoder only) ***

Dolby TrueHD Dolby TrueHD is a lossless, multi-channel audio codec developed by Dolby Laboratories for home video, used principally in Blu-ray Disc and compatible hardware. Dolby TrueHD, along with Dolby Digital Plus (E-AC-3) and Dolby AC-4, is one of the int ...

Standard for

DVD-Audio DVD-Audio (commonly abbreviated as DVD-A) is a digital format for delivering high-fidelity audio content on a DVD. DVD-Audio uses most of the storage on the disc for high-quality audio and is not intended to be a video delivery format. The sta ...

in Blu-ray (mathematically based on MLP) **** FFmpeg ***

Meridian Lossless Packing Meridian Lossless Packing, also known as Packed PCM (PPCM), is a lossless compression technique for PCM audio data developed by Meridian Audio, Ltd. MLP is the standard lossless compression method for DVD-Audio content (often advertised with t ...

(MLP), also known as

Packed PCM Meridian Lossless Packing, also known as Packed PCM (PPCM), is a lossless compression technique for PCM audio data developed by Meridian Audio, Ltd. MLP is the standard lossless compression method for DVD-Audio content (often advertised with t ...

(PPCM) Standard for

in DVD **** FFmpeg *** MPEG-4

Audio Lossless Coding MPEG-4 Audio Lossless Coding, also known as MPEG-4 ALS, is an extension to the MPEG-4 Part 3 audio standard to allow lossless audio compression. The extension was finalized in December 2005 and published as ISO/IEC 14496-3:2005/Amd 2:2006 in 2006. ...

(MPEG-4 ALS) **** SSC, DST, ALS and SLS reference software (ISO/IEC 14496-5:2001/Amd.10:2007) **** FFmpeg (decoding only) *** MPEG-4

Scalable Lossless Coding MPEG-4 SLS, or MPEG-4 Scalable to Lossless as per ISO/ IEC 14496-3:2005/Amd 3:2006 (Scalable Lossless Coding), is an extension to the MPEG-4 Part 3 ( MPEG-4 Audio) standard to allow lossless audio compression scalable to lossy MPEG-4 General Aud ...

(MPEG-4 SLS) Parts of it are used in

HD-AAC MPEG-4 SLS, or MPEG-4 Scalable to Lossless as per ISO/IEC 14496-3:2005/Amd 3:2006 (Scalable Lossless Coding), is an extension to the MPEG-4 Part 3 (MPEG-4 Audio) standard to allow lossless audio compression scalable to lossy MPEG-4 General Audi ...

. **** SSC, DST, ALS and SLS reference software (ISO/IEC 14496-5:2001/Amd.10:2007) ***

RealAudio RealAudio, or also spelled as Real Audio is a proprietary audio format developed by RealNetworks and first released in April 1995. It uses a variety of audio codecs, ranging from low-bitrate formats that can be used over dialup modems, to high-fid ...

Lossless **** RealPlayer **** FFmpeg (decoding only) *** BFDLAC (BFD Lossless Audio Compression). Ongoing development. ****

FXpansion FXpansion is a Ltd company that produces music software including Geist2, Strobe2, Tremor, Etch, Bloom, Maul and DCAM Dynamics. History FXpansion is a company that develops music software, and was founded in 1999 in London, United Kingd ...

's BFD3 drum software. (2013-2017) ** Oddball *** ATRAC Advanced Lossless (AAL) Extremely unpopular **** FFmpeg (lossy decoder only) ***

Direct Stream Transfer Super Audio CD (SACD) is an optical disc format for audio storage introduced in 1999. It was developed jointly by Sony and Philips Electronics and intended to be the successor to the Compact Disc (CD) format. The SACD format allows multiple au ...

(DST) - Only used for

**** SSC, DST, ALS and SLS reference software (ISO/IEC 14496-5:2001/Amd.10:2007) **** FFmpeg (decoder only) *** Original Sound Quality (OSQ) - Only used in

WaveLab WaveLab is a digital audio editor and recording computer software application for Windows and macOS, created by Steinberg. WaveLab was started in 1995 and it is mainly the work of one programmer, Philippe Goutier. Audio can be edited as a sin ...

* Discontinued ** Lossless Audio (LA) – No update for 10+ years ** Shorten (SHN) – Officially discontinued. *** libshn *** FFmpeg (decoding only) ** Lossless Predictive Audio Compression (LPAC) – Predecessor of MPEG-4 ALS ** Lossless Transform Audio Compression (LTAC) – Predecessor of LPAC ** MPEG-1 Audio Layer III HD (

mp3HD MPEG-1 Audio Layer III HD more commonly known and advertised by its abbreviation mp3HD is an audio compression codec developed by Technicolor formerly known as Thomson. It achieves lossless data compression, and is backwards compatible with the M ...

) – Officially discontinued ** RK Audio (RKAU) – Officially discontinued

Bluetooth lossless

Doesn't exist.

Lossy compression

* Discrete cosine transform (DCT) **

Modified discrete cosine transform The modified discrete cosine transform (MDCT) is a transform based on the type-IV discrete cosine transform (DCT-IV), with the additional property of being lapped transform, lapped: it is designed to be performed on consecutive blocks of a larger ...

(MDCT, used in most of the

audio codecs An audio codec is a device or computer program capable of encoding or decoding a digital data stream (a codec) that encodes or decodes audio. In software, an audio codec is a computer program implementing an algorithm that compresses and decompres ...

listed below)

General/Speech hybrid

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. It was developed by Moving Picture Experts Group (MPE ...

(USAC,

MPEG-D MPEG-D is a group of standards for audio coding formally known as '' ISO/IEC 23003'' - ''MPEG audio technologies'', published since 2007. MPEG-D consists of four parts: * MPEG-D Part 1: MPEG Surround MPEG Surround (ISO/ IEC 23003-1 or MPEG-D P ...

Part 3, ISO/IEC 23003-3) ** exhale (encoder only; open source) * IETF standards: **

Opus ''Opus'' (pl. ''opera'') is a Latin word meaning "work". Italian equivalents are ''opera'' (singular) and ''opere'' (pl.). Opus or OPUS may refer to: Arts and entertainment Music * Opus number, (abbr. Op.) specifying order of (usually) publicatio ...

(RFC 6716) based on SILK vocoder and CELT codec *** libopus *** FFmpeg (decoding and experimental encoding) * IETF

Internet Draft An Internet Draft (I-D) is a document published by the Internet Engineering Task Force (IETF) containing preliminary technical specifications, results of networking-related research, or other technical information. Often, Internet Drafts are int ...

** IPMR Speech Codec - used in Spirit DSP's TeamSpirit Voice&Video Engine

Neural audio codecs

Lyra (codec) Lyra is a lossy audio codec developed by Google that is designed for compressing speech at very low bitrates. Unlike most other audio formats, it compresses data using a machine learning-based algorithm. Features The Lyra codec is designed to tr ...

- used in

Google Duo Google Duo is a proprietary voice over IP (VoIP) and videotelephony service developed by Google, available for Android, iOS and web browsers. It lets users make and receive one-to-one and group audio and video calls with other Duo users in hig ...

Lyra Lyra (; Latin for lyre, from Greek ''λύρα'') is a small constellation. It is one of the 48 listed by the 2nd century astronomer Ptolemy, and is one of the modern 88 constellations recognized by the International Astronomical Union. Lyra was ...

V2 - based on SoundStream neural codec *

Satin A satin weave is a type of fabric weave that produces a characteristically glossy, smooth or lustrous material, typically with a glossy top surface and a dull back. It is one of three fundamental types of textile weaves alongside plain weave ...

(used by

Microsoft Teams Microsoft Teams is a proprietary business communication platform developed by Microsoft, as part of the Microsoft 365 family of products. Teams primarily competes with the similar service Slack, offering workspace chat and videoconferencin ...

) *

Facebook Facebook is an online social media and social networking service owned by American company Meta Platforms. Founded in 2004 by Mark Zuckerberg with fellow Harvard College students and roommates Eduardo Saverin, Andrew McCollum, Dustin M ...

EnCodec

General

Adaptive differential pulse-code modulation Adaptive differential pulse-code modulation (ADPCM) is a variant of differential pulse-code modulation (DPCM) that varies the size of the quantization step, to allow further reduction of the required data bandwidth for a given signal-to-noise ratio ...

(ADPCM, also called adaptive delta pulse-code modulation) *

Adaptive Transform Acoustic Coding Adaptive Transform Acoustic Coding (ATRAC) is a family of proprietary audio compression algorithms developed by Sony. MiniDisc was the first commercial product to incorporate ATRAC in 1992. ATRAC allowed a relatively small disc like MiniDisc to h ...

(ATRAC, used in

MiniDisc MiniDisc (MD) is an erasable magneto-optical disc-based data storage format offering a capacity of 60, 74, and later, 80 minutes of digitized audio. Sony announced the MiniDisc in September 1992 and released it in November of that year fo ...

devices) ** FFmpeg (decoder only) * ATSC/ETSI standards: **

Dolby Digital Dolby Digital, originally synonymous with Dolby AC-3, is the name for what has now become a family of audio compression technologies developed by Dolby Laboratories. Formerly named Dolby Stereo Digital until 1995, the audio compression is lossy ...

(AC3, ATSC A/52, ETSI TS 102 366) *** FFmpeg *** liba52 (decoder only) **

Dolby Digital Plus Dolby Digital Plus, also known as Enhanced AC-3 (and commonly abbreviated as DDP, DD+, E-AC-3 or EC-3) is a data compression, digital audio compression scheme developed by Dolby Labs for transport and storage of multi-channel digital audio. It is ...

(E-AC-3, ATSC A/52:2012 Annex E, ETSI TS 102 366 Annex E) *** FFmpeg **

DTS Coherent Acoustics DTS, Inc. (originally Digital Theater Systems) is an American company that makes multichannel audio technologies for film and video. Based in Calabasas, California, the company introduced its DTS technology in 1993 as a competitor to Dolby Labor ...

(DTS, Digital Theatre System Coherent Acoustics, ETSI TS 102 114) *** FFmpeg *** libdca (decoder only) **

Dolby AC-4 Dolby AC-4 is an audio compression technology developed by Dolby Laboratories. Dolby AC-4 bitstreams can contain audio channels and/or audio objects. Dolby AC-4 has been adopted by the DVB project and standardized by the ETSI. History Its develop ...

(ETSI TS 103 190) *

Impala The impala or rooibok (''Aepyceros melampus'') is a medium-sized antelope found in eastern and southern Africa. The only extant member of the genus '' Aepyceros'' and tribe Aepycerotini, it was first described to European audiences by Germa ...

Blackbird audio codec *

ITU The International Telecommunication Union is a specialized agency of the United Nations responsible for many matters related to information and communication technologies. It was established on 17 May 1865 as the International Telegraph Unio ...

standards: ** G.719 **

G.722 G.722 is an ITU-T standard 7 kHz wideband audio codec operating at 48, 56 and 64 kbit/s. It was approved by ITU-T in November 1988. Technology of the codec is based on sub-band ADPCM (SB-ADPCM). The corresponding narrow-band codec based on ...

*** FFmpeg **

G.722.1 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 imple ...

(subset of Siren7) and G.722.1 Annex C (subset of Siren14) *** libg722_1 *** libsiren (part of libmsn and msn-pecan) ** G.722.2 *** 3GPP TS 26.173 AMR-WB speech Codec (C-source code) reference implementation3GPP (2008-12-11
3GPP TS 26.173 - AMR-WB speech Codec; version 8.0.0 Release 8
retrieved 2009-09-09 *** opencore-amr (decoder) *** VisualOn AMR-WB encoder *** FFmpeg (decoding only) ** EVS * MPEG-1 Audio and MPEG-2 Audio ** layer I (

MP1 MPEG-1 Audio Layer I, commonly abbreviated to MP1, is one of three audio formats included in the MPEG-1 standard. It is a deliberately simplified version of MPEG-1 Audio Layer II (MP2), created for applications where lower compression efficiency ...

) (

MPEG-1 MPEG-1 is a standard for lossy compression of video and audio. It is designed to compress VHS-quality raw digital video and CD audio down to about 1.5 Mbit/s (26:1 and 6:1 compression ratios respectively) without excessive quality loss, making ...

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

and non-ISO MPEG-2.5) *** FFmpeg (decoder only) ** layer II ( MP2) (

and non-ISO MPEG-2.5) *** FFmpeg ***

tooLame TooLAME is a free software MPEG-1 Layer II (MP2) audio encoder written primarily by Mike Cheng. While there are many MP2 encoders, TooLAME is well-known and widely used for its particularly high audio quality. It has been unmaintained since 2003, ...

(encoding only) *** twoLame (encoding only) ** layer III (

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, with support from other digital scientists in the United States and elsewhere. Origin ...

) (

and non-ISO MPEG-2.5) *** FFmpeg (decoding only) ***

LAME Lame or LAME may refer to: Music * "Lame" (song) by Unwritten Law * ''Lame'' (album) by Iame People * Ibrahim Lame (born 1953), Nigerian educator and politician * Jennifer Lame (), American film editor * Quintín Lame (1880–1967), Colombian ...

(encoding only) **

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 stan ...

(AAC) (

MPEG-2 Part 7 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 stand ...

) ***

FAAC FAAC or Freeware Advanced Audio Coder is a software project which includes the AAC encoder FAAC and decoder FAAD2. It supports MPEG-2 AAC as well as MPEG-4 AAC. It supports several MPEG-4 Audio object types (LC, Main, LTP for encoding and S ...

(encoder) and FAAD (decoder) ***

***

iTunes iTunes () is a software program that acts as a media player, media library, mobile device management utility, and the client app for the iTunes Store. Developed by Apple Inc., it is used to purchase, play, download, and organize digital mul ...

***

Nero AAC Codec __NOTOC__ Nero AAC Codec is a set of software tools for encoding and decoding Advanced Audio Coding (AAC) format audio, and editing MPEG-4 metadata. It was developed and distributed by Nero AG, and is available at no cost for Windows and Linux f ...

*** VisualOn AAC Encoder (a.k.a. libvo_aacenc) ***

Fraunhofer FDK AAC Fraunhofer FDK AAC is an open-source library for encoding and decoding digital audio in the Advanced Audio Coding (AAC) format. Fraunhofer IIS, developed this library for Android 4.1. It supports several Audio Object Types including MPEG-2 and ...

*** libaacplus *

MPEG-4 Audio MPEG-4 Part 3 or MPEG-4 Audio (formally International Organization for Standardization, ISO/International Electrotechnical Commission, IEC 14496-3) is the third part of the International Organization for Standardization, ISO/International Electrote ...

(AAC,

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. It specifies audio coding methods. The first version of ISO/IEC 14496-3 was publish ...

subpart 4),

HE-AAC High-Efficiency Advanced Audio Coding (HE-AAC) is an audio coding format for lossy data compression of digital audio defined as an MPEG-4 Audio profile in ISO/IEC 14496–3. It is an extension of Low Complexity AAC (AAC-LC) optimized for lo ...

and

AAC-LD The MPEG-4 Low Delay Audio Coder (a.k.a. AAC Low Delay, or AAC-LD) is audio compression standard designed to combine the advantages of perceptual audio coding with the low delay necessary for two-way communication. It is closely derived from the ...

***

FAAD2 FAAC or Freeware Advanced Audio Coder is a software project which includes the AAC encoder FAAC and decoder FAAD2. It supports MPEG-2 AAC as well as MPEG-4 AAC. It supports several MPEG-4 Audio object types (LC, Main, LTP for encoding and S ...

***

*** MPEG-4 AAC reference software (ISO/IEC 14496-5:2001) **

Harmonic and Individual Lines and Noise {{Unreferenced, date=December 2017 Harmonic and Individual Lines and Noise (HILN) is a parametric codec for audio. The basic premise of the encoder is that most audio, and particularly speech, can be synthesized from only sinusoids and noise. The ...

(HILN,

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 tec ...

Parametric Audio Coding) *** MPEG-4 reference software (ISO/IEC 14496-5:2001) **

TwinVQ TwinVQ (transform-domain weighted interleave vector quantization) is an audio compression technique developed by Nippon Telegraph and Telephone Corporation (NTT) Human Interface Laboratories (now Cyber Space Laboratories) in 1994. The compression ...

*** MPEG-4 reference software (ISO/IEC 14496-5:2001) *** FFmpeg (decoding only) ** BSAC (Bit-Sliced Arithmetic Coding) *** MPEG-4 reference software (ISO/IEC 14496-5:2001) *

MPEG-H MPEG-H is a group of international standards under development by the ISO/IEC Moving Picture Experts Group (MPEG). It has various "parts" – each of which can be considered a separate standard. These include a media transport protocol standard, ...

MPEG-H 3D Audio MPEG-H 3D Audio, specified as ISO/IEC 23008-3 (MPEG-H Part 3), is an audio coding standard developed by the ISO/IEC Moving Picture Experts Group (MPEG) to support coding audio as audio channels, audio objects, or higher order ambisonics (HOA). MPEG ...

Musepack Musepack or MPC is an open source lossy audio codec, specifically optimized for transparent compression of stereo audio at bitrates of 160–180 (manual set allows bitrates up to 320) kbit/s. It was formerly known as MPEGplus, MPEG+ or MP+. ...

(a.k.a. MPEGplus) ** Musepack SV8 Tools ** FFmpeg (decoding only) *

NICAM Near Instantaneous Companded Audio Multiplex (NICAM) is an early form of lossy compression for digital audio. It was originally developed in the early 1970s for point-to-point links within broadcasting networks.Croll, M.G., Osborne, D.W. and Spi ...

* AT&T

Perceptual Audio Coder Perceptual Audio Coder (PAC) is a lossy audio compression algorithm. It is used by Sirius Satellite Radio for their digital audio radio service. Development The original version of PAC developed by James Johnston and Anibal Ferreira at AT&T's Bell ...

* Precision Adaptive Subband Coding (PASC; a variant of MP1; used in

Digital Compact Cassette The Digital Compact Cassette (DCC) is a magnetic tape sound recording format introduced by Philips and Matsushita Electric in late and marketed as the successor to the standard analog Compact Cassette. It was also a direct competitor to Sony ...

) *

QDesign QDesign Corporation was a developer of digital audio compression technologies. The company's MP2 and MP3 technologies were used in professional audio and broadcast automation systems as well as multimedia and video production systems. QDesign dev ...

(purchased by DTS) ** QDesign Music Codec used in Apple QuickTime *** FFmpeg (decoding only) * PictureTel (purchased by

Polycom Poly, formerly Polycom, a part of HP Inc., is an American multinational corporation that develops video, voice and content collaboration and communication technology. Polycom was co-founded in 1990 by Brian L Hinman and Jeffrey Rodman. In 2018 ...

) **

Siren Siren or sirens may refer to: Common meanings * Siren (alarm), a loud acoustic alarm used to alert people to emergencies * Siren (mythology), an enchanting but dangerous monster in Greek mythology Places * Siren (town), Wisconsin * Siren, Wisc ...

7 *** libg722_1 *** libsiren (part of libmsn and msn-pecan) *** FFmpeg (decoder only) ** Siren 14 *** libg722_1 *** vgmstream (decoder only) ** Siren 22 * NTT

** FFmpeg (decoder only) ** NTT TwinVQ Encoder, NTT TwinVQ Player * Voxware MetaSound (a variant of NTT TwinVQ) ** Windows Media Player (voxmsdec.ax) ** FFmpeg (decoder only) *

Vorbis Vorbis is a free and open-source software project headed by the Xiph.Org Foundation. The project produces an audio coding format and software reference encoder/decoder (codec) for lossy audio compression. Vorbis is most commonly used in conjun ...

aoTuV Vorbis is a free and open-source software project headed by the Xiph.Org Foundation. The project produces an audio coding format and software reference encoder/decoder (codec) for lossy audio compression. Vorbis is most commonly used in conju ...

libvorbis Vorbis is a free and open-source software project headed by the Xiph.Org Foundation. The project produces an audio coding format and software reference encoder/decoder (codec) for lossy audio compression. Vorbis is most commonly used in conjun ...

Tremor A tremor is an involuntary, somewhat rhythmic, muscle contraction and relaxation involving oscillations or twitching movements of one or more body parts. It is the most common of all involuntary movements and can affect the hands, arms, eyes, fa ...

(decoder only) *

Windows Media Audio Windows Media Audio (WMA) is a series of audio codecs and their corresponding audio coding formats developed by Microsoft. It is a proprietary technology that forms part of the Windows Media framework. WMA consists of four distinct codecs. The or ...

(WMA) **

Windows Media Encoder Windows Media Encoder (WME) 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 ...

** FFmpeg

= AES3

= * SMPTE 302M ** FFmpeg (decoder only) *

Dolby E Dolby E is a lossy audio compression and decoding technology developed by Dolby Laboratories that allows 6 to 8 channels of audio to be compressed into an AES3 digital audio stream that can be stored as a standard stereo pair of digital audio t ...

** FFmpeg (decoder only)

=Bluetooth

= *

Bluetooth Special Interest Group The Bluetooth Special Interest Group (Bluetooth SIG) is the standards organization that oversees the development of Bluetooth standards and the licensing of the Bluetooth technologies and trademarks to manufacturers. The SIG is a not-for-profit ...

** Low Complexity Subband Coding (SBC) ***

BlueZ A Bluetooth stack is software that is an implementation of the Bluetooth protocol stack. Bluetooth stacks can be roughly divided into two distinct categories: # ''General-purpose'' implementations that are written with emphasis on feature-richn ...

's SBC library (libsbc) *** Fluoride Bluetooth stack (successor of

BlueDroid A Bluetooth stack is software that is an implementation of the Bluetooth protocol stack. Bluetooth stacks can be roughly divided into two distinct categories: # ''General-purpose'' implementations that are written with emphasis on feature-richn ...

) *** FFmpeg ** CVSD 8 kHz - used in Hands-Free Profile (HFP) ** modified SBC (mSBC) - used in Hands-Free Profile (HFP) *** BlueZ's SBC library (libsbc) *** Fluoride Bluetooth stack *** FFmpeg ** SBC XQ ***

PulseAudio PulseAudio is a network-capable sound server program distributed via the freedesktop.org project. It runs mainly on Linux, various BSD distributions such as FreeBSD and OpenBSD, macOS, as well as Illumos distributions and the Solaris operating ...

's bluetooth stack (encoder only) ***

PipeWire PipeWire is a server for handling audio, video streams, and hardware on Linux. It was created by Wim Taymans at Red Hat. It handles multimedia routing and pipeline processing. History In 2015, Taymans started work on PipeWire. It was based on ...

's bluetooth stack (encoder only) ** LC3 (Low Complexity Communication Codec) *

ETSI The European Telecommunications Standards Institute (ETSI) is an independent, not-for-profit, standardization organization in the field of information and communications. ETSI supports the development and testing of global technical standard ...

** LC3plus (ETSI TS 103 634) * Qualcomm Technologies International (formerly CSR) **

aptX aptX (''apt'' stands for ''audio processing technology'') is a family of proprietary audio codec An audio codec is a device or computer program capable of encoding or decoding a digital data stream (a codec) that encodes or decodes audio. In s ...

(a.k.a. apt-X) *** Qualcomm libaptXIntegration of the aptX and aptX-HD codecs for A2DP source

Android Open Source Project Android is a mobile operating system based on a modified version of the Linux kernel and other open-source software, designed primarily for touchscreen mobile devices such as smartphones and tablets. Android is developed by a consortium of ...

, January 4, 2017 *** FFmpeg ** aptX HD *** Qualcomm libaptXHD *** FFmpeg **

aptX Low Latency aptX (''apt'' stands for ''audio processing technology'') is a family of Proprietary software, proprietary audio codec compression algorithms owned by Qualcomm, with a heavy emphasis on wireless audio applications. History The original aptX al ...

aptX Adaptive aptX (''apt'' stands for ''audio processing technology'') is a family of proprietary audio codec compression algorithms owned by Qualcomm, with a heavy emphasis on wireless audio applications. History The original aptX algorithm was developed ...

FastStream 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).Bluetooth SIG, Specification of the Bluetooth System, Profiles, Advanced A ...

- a variant of SBC codec for bi-directional audio transmission *

Sony , commonly stylized as SONY, is a Japanese multinational conglomerate corporation headquartered in Minato, Tokyo, Japan. As a major technology company, it operates as one of the world's largest manufacturers of consumer and professional ...

** LDAC *** libldac (encoder only) - used in

Android Oreo Android Oreo ( codenamed Android O during development) is the eighth major release and the 15th version of the Android mobile operating system. It was first released as an alpha quality developer preview in March 2017 and released to the pub ...

*** libldacdec (decoder only) * HWA Alliance/Savitech ** LHDC *** HWA encoder/decoder ** LLAC ***HWA encoder/decoder * HiBy ** Ultra Audio Transmission (UAT) * Samsung ** Samsung HD/UHQ-BT codec ** Samsung Scalable codec

=Digital radio

= * Hybrid Digital Coding - used in

HD Radio HD Radio (HDR) is a trademark for an in-band on-channel (IBOC) digital radio broadcast technology. It generally simulcasts an existing analog radio station in digital format with less noise and with additional text information. HD Radio is used ...

(a.k.a. NRSC-5) ** NRSC-5 receiver for rtl-sdr (decoder only)

Voice

(low bit rate, optimized for speech) *

Linear predictive coding Linear predictive coding (LPC) is a method used mostly in audio signal processing and speech processing for representing the spectral envelope of a digital signal of speech in compressed form, using the information of a linear predictive model. ...

(LPC, used in most of the speech codecs listed below) **

Code-excited linear prediction Code-excited linear prediction (CELP) is a linear predictive speech coding algorithm originally proposed by Manfred R. Schroeder and Bishnu S. Atal in 1985. At the time, it provided significantly better quality than existing low bit-rate algori ...

(CELP) ***

Algebraic code-excited linear prediction Algebraic code-excited linear prediction (ACELP) is a speech coding algorithm in which a limited set of pulses is distributed as excitation to a linear prediction filter. It is a linear predictive coding (LPC) algorithm that is based on the cod ...

(ACELP) *

Xiph.Org Foundation Xiph.Org Foundation is a nonprofit organization that produces free multimedia formats and software tools. It focuses on the Ogg family of formats, the most successful of which has been Vorbis, an open and freely licensed audio format and codec d ...

Speex Speex is an audio compression codec specifically tuned for the reproduction of human speech and also a free software speech codec that may be used on VoIP applications and podcasts. It is based on the CELP speech coding algorithm.Xiph.OrIntrodu ...

, patent free *** libspeex *** FFmpeg (decoder only) *

Dialogic ADPCM Dialogic ADPCM or VOX is an audio file format, optimized for storing digitized voice data at a low sampling rate. VOX files are most commonly found in telephony applications, as well as an occasional arcade redemption game. It uses a lossy compr ...

(VOX) ** FFmpeg (decoder only) *

standards: **

G.711 G.711 is a narrowband audio codec originally designed for use in telephony that provides toll-quality audio at 64 kbit/s. G.711 passes audio signals in the range of 300–3400 Hz and samples them at the rate of 8,000 samples per second ...

(

a-law An A-law algorithm is a standard companding algorithm, used in European 8-bit PCM digital communications systems to optimize, i.e. modify, the dynamic range of an analog signal for digitizing. It is one of two versions of the G.711 standard ...

and μ-law

companding In telecommunication and signal processing, companding (occasionally called compansion) is a method of mitigating the detrimental effects of a channel with limited dynamic range. The name is a portmanteau of the words compressing and expanding, ...

; 64kbit/s), also known as PCM of voice frequencies ***

Sun Microsystems Sun Microsystems, Inc. (Sun for short) was an American technology company that sold computers, computer components, software, and information technology services and created the Java programming language, the Solaris operating system, ZFS, the ...

public domain The public domain (PD) consists of all the creative work A creative work is a manifestation of creative effort including fine artwork (sculpture, paintings, drawing, sketching, performance art), dance, writing (literature), filmmaking, ...

implementation *** FFmpeg (libavcodec) ** G.711.0 (G.711 LLC) **

G.711.1 G.711 is a narrowband audio codec originally designed for use in telephony that provides toll-quality audio at 64 kbit/s. G.711 passes audio signals in the range of 300–3400 Hz and samples them at the rate of 8,000 samples per second ...

(Wideband extension for G.711; 64/80/96kbit/s) ** G.711.1D (Super-wideband extension for G.711.1; 96/112/128kbit/s) **

G.718 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 ...

(8/12/16/24/32kbit/s) ** G.718B (Super-wideband extension for G.718; 28–48kbit/s) ** G.719 **

G.721 G7 is the Group of Seven, a group of seven industrialized nations, formed by Canada, France, Germany, Italy, Japan, the United Kingdom and the United States. G7 or G.VII may also refer to: Military * G7 howitzer, a light howitzer developed by ...

(superseded by G.726; 32kbit/s) ***

's public domain implementation **

(SB-ADPCM; 48/56/64kbit/s) *** FFmpeg ** G.722B (Super-wideband extension for G.722; 64/80/96kbit/s) ** G.722.2 (

AMR-WB Adaptive Multi-Rate Wideband (AMR-WB) is a patented wideband speech audio coding standard developed based on Adaptive Multi-Rate encoding, using a similar methodology to algebraic code-excited linear prediction (ACELP). AMR-WB provides improved sp ...

) *** 3GPP TS 26.173 AMR-WB speech Codec (C-source code) reference implementation *** opencore-amr (decoder) *** FFmpeg (decoder only) **

G.723 G.723 is an ITU-T standard speech codec using extensions of G.721 providing voice quality covering 300 Hz to 3400 Hz using Adaptive Differential Pulse Code Modulation (ADPCM) to 24 and 40 kbit/s for digital circuit multiplication equip ...

(24 and 40 kbit/s DPCM, extension to G.721, superseded by G.726) ***

's public domain implementation **

G.723.1 G.723.1 is an audio codec for voice that compresses voice audio in frames. An algorithmic look-ahead of duration means that total algorithmic delay is . Its official name is ''Dual rate speech coder for multimedia communications transmitting at ...

(MPC-MLQ or ACELP; 5.3/6.3kbit/s) *** FFmpeg **

G.726 G.726 is an ITU-T ADPCM speech codec standard covering the transmission of voice at rates of 16, 24, 32, and 40 kbit/s. It was introduced to supersede both G.721, which covered ADPCM at 32 kbit/s, and G.723, which described ADPCM for ...

(ADPCM; 16/24/32/40kbit/s) ***

's public domain implementation *** FFmpeg (libavcodec) ** G.727 ***

's public domain implementationFinding voice codecs for free software
Linux.com. October 14, 2005 ** G.728 (LD-CELP; 16kbit/s) **

G.729 G.729 is a royalty-free narrow-band vocoder-based audio data compression algorithm using a frame length of 10 milliseconds. It is officially described as ''Coding of speech at 8 kbit/s using code-excited linear prediction'' speech coding (CS-ACEL ...

(CS-ACELP; 8kbit/s) *** FFmpeg (decoder only) **

G.729a G.729 is a royalty-free narrow-band vocoder-based audio data compression algorithm using a frame length of 10 milliseconds. It is officially described as ''Coding of speech at 8 kbit/s using code-excited linear prediction'' speech coding (CS-ACEL ...

** G.729b ** G.729ab ** G.729d (6.4kbit/s) *** FFmpeg (decoder only) ** G.729e (11.8kbit/s) **

G.729.1 G.729.1 is an 8-32 kbit/s embedded speech and audio codec providing bitstream interoperability with G.729, G.729 Annex A and G.729 Annex B. Its official name is ''G.729-based embedded variable bit rate codec: An 8-32 kbit/s scalable wideband cod ...

(G.729 Annex J; Wideband extension for G.711; 8–32kbit/s) **

G.729.1E G7 is the Group of Seven, a group of seven industrialized nations, formed by Canada, France, Germany, Italy, Japan, the United Kingdom and the United States. G7 or G.VII may also refer to: Military * G7 howitzer, a light howitzer developed by ...

(Super-wideband extension for G.729.1) *

Google Google LLC () is an American multinational technology company focusing on search engine technology, online advertising, cloud computing, computer software, quantum computing, e-commerce, artificial intelligence, and consumer electronics. ...

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). It is suitable for VoIP applications and streaming audio. The encoded blocks have to be encapsulated in a su ...

(iSAC) *** WebRTC *

Nellymoser Asao Codec Asao (also known as Nellymoser audio codec) is a proprietary single-channel (mono) codec and compression format optimized for low-bitrate transmission of audio, developed by Nellymoser Inc. Technical Details Sound data is grouped into frames o ...

** FFmpeg (libavcodec) *

PictureTel PictureTel Corporation, often shortened to PictureTel Corp., was one of the first commercial videoconferencing product companies. It achieved peak revenues of over $490 million in 1996 and 1997 and was eventually acquired by Polycom in October ...

PT716, PT716plus * PictureTel PT724 *

RTAudio RTAudio is a Microsoft produced adaptive wide-band speech codec. It is used by Microsoft Office Communications Server (OCS) and the related OCS clients ( Microsoft Office Communicator, and Microsoft Live Meeting Console). RTAudio was designed for ...

used by

Microsoft Live Communication Server Skype for Business Server (formerly Microsoft Office Communications Server and Microsoft Lync Server) is real-time communications server software that provides the infrastructure for enterprise instant messaging, presence, VoIP, ad hoc and str ...

SVOPC SVOPC (Sinusoidal Voice Over Packet Coder) is a compression method for audio which is used by VOIP applications. It is a lossy speech compression codec designed specifically towards communication channels suffering from packet loss. It uses more ...

used by Skype * OpenLPC created by Future Dynamics ** HawkVoice (libHVDI) * ANSI/

SCTE The Society of Cable Telecommunications Engineers or SCTE is a non-profit professional association for the advancement of technology, standards and workforce education related to cable telecommunications engineering. Founded in 1969 as The Societ ...

** ANSI/

24-21 2006 (BroadVoice16) *** BroadVoice Speech Codec Open Source C Code ** ANSI/SCTE 24-22 2013 (iLBCv2.0) ** ANSI/SCTE 24-23 2007 (BroadVoice32) *** BroadVoice Speech Codec Open Source C Code * IETF RFCs: **

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

(iLBC, RFC 3951) developed by

Global IP Solutions Global IP Solutions (also known as GIPS) was a United States-based corporation that developed real-time voice and video processing software for IP networks, before it was acquired by Google in May 2010. The company delivered embedded software th ...

/Google *** WebRTC * IETF

SILK Silk is a natural protein fiber, some forms of which can be woven into textiles. The protein fiber of silk is composed mainly of fibroin and is produced by certain insect larvae to form cocoons. The best-known silk is obtained from the coc ...

(used by

Skype Skype () is a proprietary telecommunications application operated by Skype Technologies, a division of Microsoft, best known for VoIP-based videotelephony, videoconferencing and voice calls. It also has instant messaging, file transfer, deb ...

) **

CELT The Celts (, see pronunciation for different usages) or Celtic peoples () are. "CELTS location: Greater Europe time period: Second millennium B.C.E. to present ancestry: Celtic a collection of Indo-European peoples. "The Celts, an ancient ...

(developed by

) *** libcelt *

** MPEG-4 CELP ** MPEG-4 HVXC * Skyphone MPLP * Inmarsat ** INMARSAT-M IMBE ** Inmarsat Mini-M AMBE

=Microsoft DirectPlay

= Those codecs are used by many PC games which use voice chats via Microsoft

DirectPlay DirectPlay is part of Microsoft's DirectX API. It is a network communication library intended for computer game development, although it can be used for other purposes. DirectPlay is a high-level software interface between applications and commun ...

API. * Voxware MetaVoice ** Windows Media Player (voxmvdec.ax) *

Truespeech Truespeech is a proprietary audio codec produced by the DSP Group. It is designed for encoding voice data at low bitrates (8.5kbps for 8kHz samples), and to be embedded into DSP chips. Truespeech had been integrated into Windows Media Player in old ...

** Windows Media Player (tssoft32.acm) ** FFmpeg (decoder only) * MS GSM ** Windows Media Player (msgsm32.acm) ** libgsm ** FFmpeg (decoder only) * MS-ADPCM ** Windows Media Player (msadp32.acm) ** FFmpeg

=Digital Voice Recorder

= * International Voice Association (IVA) standards: **

Digital Speech Standard Digital Speech Standard (DSS) is a Proprietary software, proprietary Audio data compression, compressed digital audio file format defined by the International Voice Association, a co-operative venture by Olympus company, Olympus, Philips and Grundig ...

/ Standard Play (DSS-SP) *** FFmpeg (decoding only) ** Digital Speech Standard / Quality Play (DSS-QP) * Sony LPEC * Truespeech Triple Rate CODER (TRC) used in some pocket recorders * Intermetall MI-SC4 - used by voice recorders such as

RadioShack RadioShack, formerly RadioShack Corporation, is an American retailer founded in 1921. At its peak in 1999, RadioShack operated over 8,000 worldwide stores named RadioShack or Tandy Electronics in the United States, Mexico, United Kingdom, Austra ...

Digital Recorder and HyperHyde ** FFmpeg (decoder only)

=Mobile phone

Generation 2

European Telecommunications Standards Institute The European Telecommunications Standards Institute (ETSI) is an independent, not-for-profit, standardization organization in the field of Information and communications technology, information and communications. ETSI supports the developmen ...

(ETSI)

GSM The Global System for Mobile Communications (GSM) is a standard developed by the European Telecommunications Standards Institute (ETSI) to describe the protocols for second-generation ( 2G) digital cellular networks used by mobile devices such ...

Full Rate Full Rate (FR or GSM-FR or GSM 06.10 or sometimes simply GSM) was the first digital speech coding standard used in the GSM digital mobile phone system. It uses linear predictive coding (LPC). The bit rate of the codec is 13 kbit/s, or 1.625 bits/a ...

(GSM 06.10, RPE-LTP) *** libgsm *** FFmpeg (decoder only) **

Half Rate Half Rate (HR or GSM-HR or GSM 06.20) is a speech coding system for GSM, developed in the early 1990s. Since the codec, operating at 5.6 kbit/s, requires half the bandwidth of the Full Rate codec, network capacity for voice traffic is doubled, at ...

(GSM 06.20, VSELP 5.6kbit/s) ** Enhanced Full Rate (GSM 06.60, ACELP 12.20kbit/s, compatible with AMR mode AMR_12.20) *

Telecommunications Industry Association The Telecommunications Industry Association (TIA) is accredited by the American National Standards Institute (ANSI) to develop voluntary, consensus-based industry standards for a wide variety of Information and Communication Technologies (Inform ...

(TIA) IS-95 (a.k.a. cdmaOne) ** IS-96A (QCELP 8kbit/s) ** IS-127 (EVRC 8kbit/s) ** IS-733 (QCELP 13kbit/s) *

(TIA) IS-54/IS-136 (a.k.a. Digital AMPS) ** IS-85 (

VSELP Vector sum excited linear prediction (VSELP) is a speech coding method used in several cellular standards. The VSELP algorithm is an analysis-by-synthesis coding technique and belongs to the class of speech coding algorithms known as CELP (Code Exc ...

8kbit/s) *** ITU-T G.191's IS-54 implementation ** IS-641 (ACELP 7.4kbit/s, compatible with AMR mode AMR_7.40) *

Association of Radio Industries and Businesses The , commonly known as , is a standardization organization in Japan. ARIB is designated as the center of promotion of the efficient use of the radio spectrum and designated frequency change support agency. Its activities include those previously ...

(ARIB) RCR STD-27 ( PDC) **

PDC-HR Personal Digital Cellular (PDC) was a 2G mobile telecommunications standard used exclusively in Japan. After a peak of nearly 80 million subscribers to PDC, it had 46 million subscribers in December 2005, and was slowly phased out in favor of 3 ...

(PSI-CELP 3.45kbit/s) ** PDC-FR (VSELP 11.2kbit/s) **

PDC-EFR Personal Digital Cellular (PDC) was a 2G mobile telecommunications standard used exclusively in Japan. After a peak of nearly 80 million subscribers to PDC, it had 46 million subscribers in December 2005, and was slowly phased out in favor of 3 ...

CS-ACELP 8kbit/s (a.k.a. G.729) **

ACELP 6.7kbit/s (compatible with AMR mode AMR_6.70)

Generation 3/4

* 3rd Generation Partnership Project (3GPP) **

Adaptive Multi-Rate The Adaptive Multi-Rate (AMR, AMR-NB or GSM-AMR) audio codec is an audio compression format optimized for speech coding. AMR speech codec consists of a multi-rate narrowband speech codec that encodes narrowband (200–3400 Hz) signals at var ...

(AMR) ***

AMR-NB The Adaptive Multi-Rate (AMR, AMR-NB or GSM-AMR) audio codec is an audio compression format optimized for speech coding. AMR speech codec consists of a multi-rate narrowband speech codec that encodes narrowband (200–3400 Hz) signals at var ...

**** 3GPP TS 26.073 AMR speech Codec (C-source code) reference implementation **** opencore-amr (one may compile ffmpeg with—enable-libopencore-amrnb to incorporate the OpenCORE lib) **** FFmpeg (by default decoder only, but see above the compiling options to incorporate the OpenCORE lib) ***

**** 3GPP TS 26.173 AMR-WB speech Codec (C-source code) reference implementation **** opencore-amr (decoder), from OpenCORE (one may compile ffmpeg with—enable-libopencore-amrwb to incorporate the OpenCORE lib) **** vo-amrwbenc (encoder), from

VisualOn VisualOn is a Silicon Valleybased multimedia software company that provides high-definition audio and video entertainment to smartphones, tablets, laptops, connected TVs and other mobile and convergent devices. VisualOn's patented technology is ...

, included in Android (one may compile ffmpeg with—enable-libvo-amrwbenc to incorporate the VisualOn lib) **** FFmpeg (by default decoder only, but see above the compiling options). *** AMR-WB+ **** 3GPP TS 26.273 AMR-WB+ speech Codec (C-source code) reference implementation ***

Enhanced Voice Services Enhanced Voice Services (EVS) is a superwideband speech audio coding standard that was developed for VoLTE. It offers up to 20 kHz audio bandwidth and has high robustness to delay jitter and packet losses due to its channel aware coding and ...

(EVS) **** 3GPP TS.26.443 – Codec for Enhanced Voice Services (EVS) – ANSI C code (floating-point) *

3rd Generation Partnership Project 2 The 3rd Generation Partnership Project 2 (3GPP2) is a collaboration between telecommunications associations to make a globally applicable third generation ( 3G) mobile phone system specification within the scope of the ITU's IMT-2000 project. In ...

(3GPP2) **

Enhanced Variable Rate Codec Enhanced Variable Rate CODEC (EVRC) is a speech codec used in CDMA networks. It was developed in 1995 to replace the QCELP vocoder which used more bandwidth on the carrier's network, thus EVRC's primary goal was to offer the mobile carriers more cap ...

(EVRC, a.k.a. IS-127) based on RCELP *** FFmpeg (decoder only) ** Enhanced Variable Rate Codec B (EVRC-B) **

QCELP Qualcomm code-excited linear prediction (QCELP), also known as Qualcomm PureVoice, is a speech codec developed in 1994 by Qualcomm to increase the speech quality of the IS-96A codec earlier used in CDMA networks. It was later replaced with EVRC ...

(Qualcomm Code Excited Linear Prediction) *** QCELP-8 (a.k.a. SmartRate or IS-96C) **** FFmpeg (decoder only) *** QCELP-13 (a.k.a. PureVoice or IS-733) **** FFmpeg (decoder only) **

Selectable Mode Vocoder Selectable Mode Vocoder (SMV) is variable bitrate speech coding standard used in CDMA2000 networks. SMV provides multiple modes of operation that are selected based on input speech characteristics. The SMV for Wideband CDMA is based on 4 codecs: ...

(SMV) ** Variable Multi Rate – WideBand (VMR-WB)

=Professional mobile radio

= * APCO **

Project 25 Project 25 (P25 or APCO-25) is a suite of standards for interoperable digital two-way radio products. P25 was developed by public safety professionals in North America and has gained acceptance for public safety, security, public service, and c ...

Phase 2 Enhanced Full-Rate (

AMBE An ambe, in anatomy, is a superficial jutting out of a bone. Ambe is also the name of an old surgical instrument, made famous by Hippocrates, for reducing dislocations of the shoulder, so called because its extremity projects like the prominence o ...

+2 4400bit/s with 2800bit/s FEC) **

Phase 2 Half-Rate (AMBE+2 2450bit/s with 1150bit/s FEC) also used in NXDN and DMR *** mbelib (decoder only) ** Project 25 Phase 1 Full Rate (

IMBE Imbe may refer to: * Imbe (tree), a fruit tree native to Africa * Imbe, Okayama, a township in Japan ** Imbe Station is a railway station in Imbe, Bizen, Okayama Prefecture, Japan. Lines *West Japan Railway Company ** Akō Line Layout *Ka ...

7200bit/s) *** mbelib (decoder only) * European Telecommunications Standards Institute (

) ** ETS 300 395-2 (TETRA

ACELP Algebraic code-excited linear prediction (ACELP) is a speech coding algorithm in which a limited set of pulses is distributed as excitation to a linear prediction filter. It is a linear predictive coding (LPC) algorithm that is based on the code- ...

4.6kbit/s) *

TETRAPOL TETRAPOL (Terrestrial Trunked Radio POLice) is a digital professional mobile radio standard, as defined by the Tetrapol Publicly Available Specification (PAS), in use by professional user groups, such as public safety, military, industry and transp ...

** RPCELP 6kbit/s *

D-STAR D-STAR (Digital Smart Technologies for Amateur Radio) is a digital voice and data protocol specification for amateur radio. The system was developed in the late 1990s by the Japan Amateur Radio League and uses minimum-shift keying in its packet- ...

Digital Voice (AMBE 2400bit/s with 1200bit/s FEC) ** mbelib (decoder only) * Professional Digital Trunking System Industry Association (PDT Alliance) standards: ** NVOC used in China * Spirit DSP RALCWI * DSPINI ** SPR Robust ** TWELP Robust *

Codec2 Codec 2 is a low-bitrate speech audio codec (speech coding) that is patent free and open source. Codec 2 compresses speech using sinusoidal coding, a method specialized for human speech. Bit rates of 3200 to 450 bit/s have been successfully cre ...

** libcodec2 * RL-CELP (used in Japanese railwaysINFORMATION COLLECTION SURVEY FOR THE MEGA MANILA SUBWAY PROJECT IN THE REPUBLIC OF THE PHILIPPINES

Japan International Cooperation Agency The is a governmental agency that delivers the bulk of Official Development Assistance (ODA) for the government of Japan. It is chartered with assisting economic and social growth in developing countries, and the promotion of international co ...

September, 2015)

=Military

= *

U.S. Department of Defense The United States Department of Defense (DoD, USDOD or DOD) is an executive branch department of the federal government charged with coordinating and supervising all agencies and functions of the government directly related to national secur ...

(DoD) Federal Standard: **

FS-1015 FIPS 137, originally issued as FED-STD-1015, is a secure telephony speech encoding standard for Linear Predictive Coding vocoder developed by the United States Department of Defense and finished on November 28, 1984. It was based on the earlier STA ...

(a.k.a. LPC-10) *** HawkVoice (libHVDI) **

FS-1016 FS-1016 (also called FED-STD-1016) is a deprecated secure telephony speech encoding standard for Code-excited linear prediction (CELP) developed by the United States Department of Defense and finalized February 14, 1991. Unlike the vocoder used ...

(

CELP Code-excited linear prediction (CELP) is a linear predictive speech coding algorithm originally proposed by Manfred R. Schroeder and Bishnu S. Atal in 1985. At the time, it provided significantly better quality than existing low bit-rate algori ...

) *** HawkVoice (libHVDI) ** FS-1023 (

CVSD Continuously variable slope delta modulation (CVSD or CVSDM) is a voice coding method. It is a delta modulation with variable step size (i.e., special case of adaptive delta modulation), first proposed by Greefkes and Riemens in 1970. CVSD encode ...

12kbit/s) *

United States Military Standard A United States defense standard, often called a military standard, "MIL-STD", "MIL-SPEC", or (informally) "MilSpecs", is used to help achieve standardization objectives by the U.S. Department of Defense. Standardization is beneficial in achievin ...

(MIL-STD) **

MIL-STD-188 MIL-STD-188 is a series of U.S. military standards relating to telecommunications. Purpose Faced with "past technical deficiencies in telecommunications systems and equipment and software…that were traced to basic inadequacies in the applicat ...

113 (CVSD 16kbit/s and 32kbit/s) ***

SoX Sox most often refers to: * Boston Red Sox, an MLB team * Chicago White Sox, an MLB team * An alternate spelling of socks Sox may also refer to: Places * SOX, Sogamoso Airport's IATA airport code, an airport in Colombia Computing and technolo ...

(libsox) ** MIL-STD-3005 (a.k.a.

MELP Mixed-excitation linear prediction (MELP) is a United States Department of Defense speech coding standard used mainly in military applications and satellite communications, secure voice, and secure radio devices. Its standardization and later devel ...

) ***

Texas Instruments Texas Instruments Incorporated (TI) is an American technology company headquartered in Dallas, Texas, that designs and manufactures semiconductors and various integrated circuits, which it sells to electronics designers and manufacturers globall ...

' 2.4 kbit/s MELP Proposed Federal Standard speech coder * NATO ** STANAG 4198 (a.k.a. LPC-10e) *** SpanDSP (open source) ** STANAG-4591 (a.k.a. MELPe) *** Microsoft Speech coder * BBN NRV developed in

DARPA The Defense Advanced Research Projects Agency (DARPA) is a research and development agency of the United States Department of Defense responsible for the development of emerging technologies for use by the military. Originally known as the Adv ...

program

Video games

* Bink Audio, Smacker Audio ** FFmpeg (decoder only) * Actimagine ( Nintendo European Research & Development) FastAudio ** MobiclipDecoder (decoder only) ** FFmpeg (decoder only) * Nintendo GCADPCM (a.k.a. DSP ADPCM or THP ADPCM) - used in

GameCube The is a home video game console developed and released by Nintendo in Japan on September 14, 2001, in North America on November 18, 2001, and in PAL territories in 2002. It is the successor to the Nintendo 64 (1996), and predecessor of the Wii ...

Wii The Wii ( ) is a home video game console developed and marketed by Nintendo. It was released on November 19, 2006, in North America and in December 2006 for most other Regional lockout, regions of the world. It is Nintendo's fifth major ho ...

and

Nintendo 3DS The is a handheld game console produced by Nintendo. It was announced in March 2010 and unveiled at E3 2010 as the successor to the Nintendo DS. The system features backward compatibility with Nintendo DS video games. As an eighth-generatio ...

. ** vgmstream (decoder only) ** VGAudio ** FFmpeg (decoder only) * Sony VAGAudioCompressionFormat
Unity Technologies (a.k.a. Sony PSX ADPCM) ** vgmstream (decoder only) ** FFmpeg (decoder only) * Sony HEVAG - used in

PS Vita The PlayStation Vita (PS Vita, or Vita) is a handheld video game console developed and marketed by Sony Interactive Entertainment. It was first released in Japan on December 17, 2011, and in North America, Europe, and other international territ ...

. ** vgmstream (decoder only) * Sony ATRAC9 - used in

PS4 The PlayStation 4 (PS4) is a home video game console developed by Sony Interactive Entertainment. Announced as the successor to the PlayStation 3 in February 2013, it was launched on November 15, 2013, in North America, November 29, 2013 in E ...

and

. ** VGAudio (decoder only) ** FFmpeg (decoder only) * Microsoft XMA - WMA variants for

Xbox 360 The Xbox 360 is a home video game console developed by Microsoft. As the successor to the original Xbox, it is the second console in the Xbox series. It competed with Sony's PlayStation 3 and Nintendo's Wii as part of the seventh generation ...

hardware decoding. ** FFmpeg (decoder only) * Xbox ADPCM ** vgmstream (decoder only) *

CRI CRI or CRi may refer to: Organizations * Canadian Rivers Institute, for river sciences, University of New Brunswick * Cancer Research Institute, New York, US * Centro de Relaciones Internacionales (International Relations Center), Universidad N ...

ADX ADPCM ** vgmstream (decoder only) ** VGAudio ** FFmpeg * CRI HCA/HCA-MX - used in CRI ADX2 middleware. ** vgmstream (decoder only) ** VGAudio ** FFmpeg (decoder only) ** libcgss ** HCADecoder (decoder only) * FMOD FADPCM ** vgmstream (decoder only)

Text compression formats

BiM ''Bim'' is a 1974 Trinidad and Tobago film written by Raoul Pantin and directed by Hugh A. Robertson. It was described by Bruce Paddington as "one of the most important films to be produced in Trinidad and Tobago and... one of the classics of Ca ...

Continuous Media Markup Language Continuous Media Markup Language (CMML) is to audio or video what HTML is to text. CMML is essentially a timed text codec. It allows file creators to structure a time-continuously sampled data file by dividing it into temporal sections (also called ...

(CMML) *

MPEG-4 Part 17 MPEG-4 Part 17, or MPEG-4 Timed Text (MP4TT), or MPEG-4 Streaming text format is the text-based subtitle format for MPEG-4, published as ISO/IEC 14496-17 in 2006. It was developed in response to the need for a generic method for coding of text as ...

(e.g. 3GPP Timed Text) *

ttyrec ttyrec is a program or its file format capable of recording the TTY output of a text-mode program together with timestamps and then replaying it. It is widely used for example in the ''NetHack'' community for storing game replays. It is simila ...

Video compression formats

Non-compression

* RGB 4:4:4 (only linear, transfer-converted and bit-reduced also sort of compression up to about 3:1 for HDR) * YUV 4:4:4/4:2:2/4:1:1/4:2:0 (all lower 4:4:4 is spatially compressed up to 2:1 for 4:2:0 with specific colour distortions). ** Intel IYUV * 10-bit uncompressed video * Composite digital signal - used by SMPTE D-2 and D-3 broadcast digital videocassettes * Avid DNxUncompressed * V210

Analog signals

PAL Phase Alternating Line (PAL) is a colour encoding system for analogue television. It was one of three major analogue colour television standards, the others being NTSC and SECAM. In most countries it was broadcast at 625 lines, 50 fields (25 ...

broadcast signal ** Pyctools-PAL (open source) *

NTSC The first American standard for analog television broadcast was developed by National Television System Committee (NTSC)National Television System Committee (1951–1953), Report and Reports of Panel No. 11, 11-A, 12–19, with Some supplement ...

broadcast signal ** gr-ntsc (open source) *

LaserDisc The LaserDisc (LD) is a home video format and the first commercial optical disc storage medium, initially licensed, sold and marketed as DiscoVision, MCA DiscoVision (also known simply as "DiscoVision") in the United States in 1978. Its diam ...

RF signal ** ld-decode (open source) * VHS /

S-VHS , the common initialism for Super VHS, is an improved version of the VHS standard for consumer-level video recording. Victor Company of Japan introduced S-VHS in Japan in April 1987, with their JVC-branded HR-S7000 VCR, and in certain overseas ...

U-Matic U-matic is an analogue recording videocassette format first shown by Sony in prototype in October 1969, and introduced to the market in September 1971. It was among the first video formats to contain the videotape inside a cassette, as oppo ...

RF signal ** VHS-Decode (open source) * Composite Video Baseband Signal (CVBS) ** VHS-Decode's CVBS-Decode (open source)

Lossless Lossless compression is a class of data compression that allows the original data to be perfectly reconstructed from the compressed data with no loss of information. Lossless compression is possible because most real-world data exhibits statistic ...
video compression

* ITU-T/ISO/IEC standards: **

H.264 Advanced Video Coding (AVC), also referred to as H.264 or MPEG-4 Part 10, is a video compression standard based on block-oriented, motion-compensated coding. It is by far the most commonly used format for the recording, compression, and distr ...

lossless ***

x264 x264 is a free and open-source software library and a command-line utility developed by VideoLAN for encoding video streams into the H.264/MPEG-4 AVC video coding format. It is released under the terms of the GNU General Public License. History ...

(encoder only) *** FFmpeg (decoder only, uses x264 for encoding) **

H.265 H is the eighth letter of the Latin alphabet. H may also refer to: Musical symbols * H number, Harry Halbreich reference mechanism for music by Honegger and Martinů * H, B (musical note) * H, B major People * H. (noble) (died after 12 ...

lossless ***

x265 x265 is a software codec for creating digital video streams in the High Efficiency Video Coding (HEVC/H.265) video compression format developed by the Joint Collaborative Team on Video Coding (JCT-VC). It is available as a command-line app or a ...

(encoder only) *** UHDcode (decoder only, uses x265 to read HEVC encoded files) ***FFmpeg (decoder only, uses x265 for encoding) **

Motion JPEG 2000 Motion JPEG 2000 (MJ2 or MJP2) is a file format for motion sequences of JPEG 2000 images and associated audio, based on the MP4 and QuickTime format. Filename extensions for Motion JPEG 2000 video files are .mj2 and .mjp2, as defined in RFC 3 ...

lossless *** libopenjpeg **

JPEG XS JPEG XS (ISO/IEC 21122) is an interoperable, visually lossless, low-latency and lightweight image and video coding system used in professional applications. Applications of the standard include streaming high quality content for virtual reality ...

lossless *** FastTICO-XS * IETF standards: **

FFV1 FFV1 (short for FF Video 1) is a lossless intra-frame video coding format. It can use either variable-length coding or arithmetic coding for entropy coding. The encoder and decoder are part of the free, open-source library libavcodec in the pr ...

(RFC 9043) FFV1's compression factor is comparable to

, but based on quicker algorithms (allows real-time capture). Written by Michael Niedermayer and published as part of

under to

GNU LGPL The GNU Lesser General Public License (LGPL) is a free-software license published by the Free Software Foundation (FSF). The license allows developers and companies to use and integrate a software component released under the LGPL into their own ...

. *** FFmpeg * SMPTE standards: **

VC-2 Dirac is an open and royalty-free video compression format, specification and system developed by BBC Research & Development. Schrödinger and dirac-research (formerly just called "Dirac") are open and royalty-free software implementations (v ...

HQ lossless (a.k.a.

Dirac Distributed Research using Advanced Computing (DiRAC) is an integrated supercomputing facility used for research in particle physics, astronomy and cosmology in the United Kingdom. DiRAC makes use of multi-core processors and provides a variety o ...

Pro lossless) *** libdirac *** libschroedinger * Alparysoft Lossless Video Codec (Alpary) * Apple Animation (QuickTime RLE) ** QuickTime ** FFmpeg * ArithYuv *

AV1 AOMedia Video 1 (AV1) is an open, royalty-free video coding format initially designed for video transmissions over the Internet. It was developed as a successor to VP9 by the Alliance for Open Media (AOMedia), a consortium founded in 2015 th ...

** libaom * AVIzlib ** LCL (VfW codec) MSZH and ZLIB ** FFmpeg * Autodesk Animator Codec (AASC) ** FFmpeg (decoder only) * CamStudio GZIP/LZO ** FFmpeg (decoder only) * Chennai Codec (EVX-1) ** Cairo Experimental Video Codec (open source) * Dxtory ** FFmpeg (decoder only) * FastCodec * Flash Screen Video v1/v2 ** FFmpeg * FM Screen Capture Codec ** FFmpeg (decoder only) * Fraps codec (FPS1) ** FFmpeg (decoder only) * Grass Valley Lossless ** Grass Valley Codec Option ** FFmpeg (decoder only) * Huffyuv Huffyuv (or HuffYUV) was written by Ben Rudiak-Gould and published under the terms of the

GNU GPL The GNU General Public License (GNU GPL or simply GPL) is a series of widely used free software licenses that guarantee end users the four freedoms to run, study, share, and modify the software. The license was the first copyleft for general us ...

as free software, meant to replace uncompressed YCbCr as a video capture format. It uses very little cpu but takes a lot of disk space. See also ffvhuff which is an "FFmpeg" only version of it. ** FFmpeg * IgCodec * Intel RLE * innoHeim/Rsupport Screen Capture Codec ** FFmpeg (decoder only) * Lagarith A more up-to-date fork of Huffyuv is available as Lagarith ** Lagarith Codec (VfW codec) ** FFmpeg (decoder only) * LOCO - based on

JPEG-LS Lossless JPEG is a 1993 addition to JPEG standard by the Joint Photographic Experts Group to enable lossless compression. However, the term may also be used to refer to all lossless compression schemes developed by the group, including JPEG 2000 an ...

** FFmpeg (decoder only) * MagicYUV ** MagicYUV SDK ** FFmpeg (decoder only) * Microsoft RLE *

MSU Lossless Video Codec The MSU Lossless Video Codec is a video codec developed by the Graphics & Media Lab Video Group of Moscow State University. It was designed to provide space-effective lossless video compression. As of 2007 MSU had the second best compression rati ...

* MSU Screen Capture Lossless * - based on PNG ** FFmpeg * ScreenPresso (SPV1) ** FFmpeg (decoder only) * ScreenPressor - a successor of MSU Screen Capture Lossless ** FFmpeg (decoder only) * SheerVideo ** FFmpeg (decoder only) *

Snow Snow comprises individual ice crystals that grow while suspended in the atmosphere—usually within clouds—and then fall, accumulating on the ground where they undergo further changes. It consists of frozen crystalline water throughout ...

lossless ** FFmpeg * TechSmith Screen Capture Codec (TSCC) ** EnSharpen Video Codec for QuickTime ** FFmpeg (decoder only) * Toponoky *

Ut Video Codec Suite UT Video Codec Suite is a fast, lossless video codec, developed by and released under the free GNU General Public License. The algorithm of UT video is based on the Huffman code. UT video was developed as an alternative to HuffYUV, in order t ...

** libutvideo ** FFmpeg * VBLE ** FFmpeg (decoder only) * VMnc VMware screen codec - used by

VMware Workstation VMware Workstation Pro (known as VMware Workstation until release of VMware Workstation 12 in 2015) is a hosted (Type 2) hypervisor that runs on x64 versions of Windows and Linux operating systemshttps://kb.vmware.com/selfservice/microsites/sear ...

** FFmpeg (decoder only) *

VP9 VP9 is an open and royalty-free video coding format developed by Google. VP9 is the successor to VP8 and competes mainly with MPEG's High Efficiency Video Coding (HEVC/H.265). At first, VP9 was mainly used on Google's video platform YouTube. ...

** libvpx ** FFmpeg (decoder only) *

YULS YULS or YUVsoft's Lossless Video Codec, a lossless video codec developed by YUVsoft, was designed to produce highly compressed lossless video. Compared with many lossless video codecs, YULS has the best compression ratio. Releases Refer ...

* ZeroCodec ** FFmpeg (decoder only)
ZMBV
(Zip Motion Block Video) Codec - used by

DOSBox DOSBox is a free and open-source emulator which runs software for MS-DOS compatible disk operating systems—primarily video games. It was first released in 2002, when DOS technology was becoming obsolete. Its adoption for running DOS games i ...

** FFmpeg

Lossless game codecs

* DXA **

ScummVM Script Creation Utility for Maniac Mansion Virtual Machine (ScummVM) is a set of game engine recreations. Originally designed to play LucasArts adventure games that use the SCUMM system, it also supports a variety of non-SCUMM games by companies ...

Tools (encoder only) ** FFmpeg (decoder only)

Lossy compression

* Discrete cosine transform (DCT, used in

Digital Betacam Betacam is a family of half-inch professional videocassette products developed by Sony in 1982. In colloquial use, "Betacam" singly is often used to refer to a Betacam camcorder, a Betacam tape, a Betacam video recorder or the format itself. All ...

and most of the video codecs listed below)

General

* ITU-T/ISO/IEC standards: ** H.120 **

H.261 H.261 is an ITU-T video compression standard, first ratified in November 1988. It is the first member of the H.26x family of video coding standards in the domain of the ITU-T Study Group 16 Video Coding Experts Group (VCEG, then Specialists Gro ...

(a.k.a. Px64) ***

H.261 (

libavcodec libavcodec is a free and open-source library of codecs for encoding and decoding video and audio data. libavcodec is an integral part of many open-source multimedia applications and frameworks. The popular MPV, xine and VLC media players use ...

) *** Microsoft H.263 ** MPEG-1 Part 2 (

Video) ***

***

MainConcept MainConcept GmbH is a software company founded in Germany by Markus Moenig and Thomas Zabel. They specialize in developing video/audio codecs and also applications and plug-ins related to video/audio encoding. They are a subsidiary of Endeavor S ...

MPEG-1 ***

TMPGEnc TMPGEnc or TSUNAMI MPEG Encoder is a video transcoder software application primarily for encoding video files to VCD and SVCD-compliant MPEG video formats and was developed by Hiroyuki Hori and Pegasys Inc.Pegasys IncTMPGEnc User License Agreem ...

** H.262/MPEG-2 Part 2 (MPEG-2 Video) ***

Canopus Canopus is the brightest star in the southern constellation of Carina (constellation), Carina and the list of brightest stars, second-brightest star in the night sky. It is also Bayer designation, designated α Carinae, which is Lat ...

ProCoder ProCoder is a video-encoding and transcoding software initially developed by the Canopus Corporation, now Thomson SA. Canopus ProCoder 1.2 was released in 2002, Canopus ProCoder 1.5 in 2003 and Canopus ProCoder 2 in 2004. In 2005 Thomson Multim ...

*** Cinema Craft Encoder ***

***

InterVideo InterVideo was a software publisher specializing in multimedia-related programs. InterVideo's products include video capturing, video editing, DVD authoring, CD/DVD recording, film distribution, and video playback. Its best known product was Win ...

Video Decoder *** MainConcept MPEG-2 *** Microsoft H.263 ***

** H.263 ***

H.263 (

) **

MPEG-4 Part 2 MPEG-4 Part 2, MPEG-4 Visual (formally ISO/IEC 14496-2) is a video compression format developed by the Moving Picture Experts Group (MPEG). It belongs to the MPEG-4 ISO/IEC standards. It uses block-wise motion compensation and a discrete cosine tr ...

(MPEG-4 Advanced Simple Profile) ***

3ivx 3ivx ( ) was an MPEG-4 compliant video codec suite, created by 3ivx Technologies, based in Sydney, Australia. 3ivx video codecs were released from 2001 to 2012, with releases of related technologies continuing until 2015. 3ivx provided plugins to a ...

*** DivX ***

***

HDX4 HDX4 is an MPEG-4 codec developed by a German company named Jomigo Visual Technology. Benchmark tests of ''c't'' (a renowned German computer magazine), issue 05/2005 and Doom9.org showed that it was the fastest codec among the ones tested, with ...

***

Nero Digital Nero Digital is a brand name applied to a suite of MPEG-4-compatible video and audio compression codecs developed by Nero AG of Germany and Ateme of France. The audio codecs are integrated into the ''Nero Digital Audio+'' audio encoding tool for Mic ...

***

Xvid Xvid (formerly "XviD") is a video codec library following the MPEG-4 video coding standard, specifically MPEG-4 Part 2 Advanced Simple Profile (ASP). It uses ASP features such as b-frames, global and quarter pixel motion compensation, lumi mas ...

** H.264/MPEG-4 AVC or MPEG-4 Part 10 (MPEG-4 Advanced Video Coding), approved for

Blu-ray The Blu-ray Disc (BD), often known simply as Blu-ray, is a digital optical disc data storage format. It was invented and developed in 2005 and released on June 20, 2006 worldwide. It is designed to supersede the DVD format, and capable of sto ...

***

CoreAVC CoreAVC was a proprietary codec for decoding the H.264/MPEG-4 AVC (Advanced Video Coding) video format. In 2010, when CoreAVC was a software-only decoder, it was one of the fastest software decoders, but still slower than hardware-based ones. C ...

(decoder only; limited to below Hi10P profile) ***

***

*** QuickTime H.264 *** Sorenson AVC Pro codec, Sorenson's new implementation ***

OpenH264 OpenH264 is a free software library for real-time encoding and decoding video streams in the H.264/MPEG-4 AVC format. It is released under the terms of the Simplified BSD License." History Move to free-to-use binaries On October 30, 2013, Rowan T ...

(baseline profile only) ***

(encoder only; supports some of Hi422P and Hi444PP features) *** FFmpeg (decoder only) ** MPEG-4 AVC variants: *** MPEG-4 Web Video Coding or MPEG-4 Part 29 a subset of MPEG-4 AVC baseline profile ***

XAVC XAVC is a recording format that was introduced by Sony on October 30, 2012. XAVC is a format that will be licensed to companies that want to make XAVC products. Technical details XAVC uses level 5.2 of H.264/MPEG-4 AVC, which is the highest leve ...

HEVC High Efficiency Video Coding (HEVC), also known as H.265 and MPEG-H Part 2, is a video compression standard designed as part of the MPEG-H project as a successor to the widely used Advanced Video Coding (AVC, H.264, or MPEG-4 Part 10). In compari ...

(High Efficiency Video Coding, H.265, MPEG-H part 2) ***

(encoder only) **

Versatile Video Coding Versatile Video Coding (VVC), also known as H.266, ISO/IEC 23090-3, and MPEG-I Part 3, is a Video coding format, video compression standard finalized on 6 July 2020, by the Joint Video Experts Team (JVET), a joint video expert team of the Video ...

(H.266, VVC) *** VVC Test Model (VTM reference software for VVC; open source) *** Fraunhofer Versatile Video Decoder (open source; decoder only) *** Fraunhofer Versatile Video Encoder (open source; encoder only) ** Video Coding for Browsers (VCB)/

VP8 VP8 is an open and royalty-free video compression format released by On2 Technologies in 2008. Initially released as a proprietary successor to On2's previous VP7 format, VP8 was released as an open and royalty-free format in May 2010 after Goo ...

(MPEG-4 Part 31, ISO/IEC 14496-31, RFC 6386) ***

libvpx libvpx is a free software video codec library from Google and the Alliance for Open Media (AOMedia). It serves as the reference software implementation for the VP8 and VP9 video coding formats, and for AV1 a special fork named libaom that ...

*** FFmpeg **

Internet Video Coding Internet Video Coding (ISO/IEC 14496-33, MPEG-4 IVC) is a video coding standard. IVC was created by MPEG, and was intended to be a royalty-free video coding standard for use on the Internet, as an alternative to non-free formats such as AVC and ...

(ISO/IEC 14496-33, MPEG-4 IVC) **

Essential Video Coding MPEG-5 Essential Video Coding (EVC) is a current video compression standard that has been completed in April 2020 by decision of MPEG Working Group 11 at its 130th meeting. The standard consists of a royalty-free subset and individually switch ...

(EVC; MPEG-5 Part 1; under-development) ** LCEVC, MPEG-5 Part 2 ( Low Complexity Enhancement Video Coding) * IETF Internet Draft (

NETVC NETVC was the name given to a planned royalty-free video codec that was intended to be developed in the former Internet Video Codec working group of the IETF. It was intended to provide a royalty-free alternative to industry standards such as H.2 ...

) ** xvc *** Divideon's reference implementation (open source) **

Thor Thor (; from non, Þórr ) is a prominent god in Germanic paganism. In Norse mythology, he is a hammer-wielding æsir, god associated with lightning, thunder, storms, sacred trees and groves in Germanic paganism and mythology, sacred groves ...

(forms the basis of AV1) ***

Cisco Cisco Systems, Inc., commonly known as Cisco, is an American-based multinational digital communications technology conglomerate corporation headquartered in San Jose, California. Cisco develops, manufactures, and sells networking hardware, ...

's reference implementation (open source) * SMPTE standards: **

VC-1 SMPTE 421, informally known as VC-1, is a video coding format. Most of it was initially developed as Microsoft's proprietary video format Windows Media Video 9 in 2003. With some enhancements including the development of a new Advanced Profile, ...

(SMPTE 421M, subset of

Windows Media Video Windows Media Video (WMV) is a series of video codecs and their corresponding video coding formats developed by Microsoft. It is part of the Windows Media framework. WMV consists of three distinct codecs: The original video compression technology ...

) *** FFmpeg (decoder only) **

(SMPTE 2042-1) *** Schrödinger *** dirac-research *** FFmpeg (decoder only) *

Alliance for Open Media The Alliance for Open Media (AOMedia) is a non-profit industry consortium that develops open, royalty-free technology for multimedia delivery headquartered in Wakefield, Massachusetts. It uses the ideas and principles of open web standard develo ...

(AOMedia Video 1) *** libaom *** SVT-AV1 *** rav1e (encoder only) *** dav1d (decoder only) *** libgav1 (decoder only) *

Daala Daala is a video coding format under development by the Xiph.Org Foundation under the lead of Timothy B. Terriberry mainly sponsored by the Mozilla Corporation. Like Theora and Opus, Daala is available free of any royalties and its reference imp ...

(under development, basis (alongside other formats) of AV1) *** libdaala (open source) **

Theora Theora is a free file format, free Lossy compression, lossy video compression format. It is developed by the Xiph.Org Foundation and distributed without licensing fees alongside their other free and open media projects, including the Vorbis ...

(based on VP3) *** FFmpeg (decoding only) *** libtheora (open source) * Apple Video (Apple RPZA) ** QuickTime **

* FORscene#Blackbird, Blackbird FORscene video codec * FORscene#Codecs, Firebird Original FORscene video codec * Digital Video Interactive standards: ** RTV 2.1 (a.k.a. Indeo 2) *** FFmpeg (decoder only) ** PLV (Production Level Video) *** ActionMedia II driver (decoder only) * Indeo 3/4/5 * Microsoft Video 1 (MSV1, MS-CRAM, based on MotiVE) * Open Media Commons standards: ** OMS Video (based on

) * On2 Technologies TrueMotion VP3/VP4, VP5, VP6, VP7; under the name ''The Duck Corporation'': TrueMotion S, TrueMotion 2, TrueMotion RT 2.0 ** FFmpeg (decoder only) * RealVideo 1, G2, 8, 9 and 10 ** FFmpeg ** RealMedia HD SDK * RealVideo Fractal Codec (a.k.a. Iterated Systems ClearVideo) ** FFmpeg (decoder only) * RealVideo#Video compression formats and codecs, RealMedia HD (a.k.a. RealVideo 11) ** RealMedia HD SDK *

Wavelet Codec * Sorenson Video, Sorenson Spark ** FFmpeg *

by Google; VP10 was not released and instead was integrated into AV1 **

** FFmpeg *

(WMV) ** WAX (Part of the Windows Media Series) ** FFmpeg * Guobiao standards (GB/T) ** Audio Video Standard, Audio Video Standard (AVS) *** AVS1-P2 (GB/T 20090.2-2006) - used in China Blue High-definition Disc. **** FFmpeg (decoding only) *** AVS1-P7 (AVS-M; under-development) *** AVS2-P2 (GB/T 33475.2-2016, IEEE 1857.4 (draft)) **** uAVS2 Encoder **** xavs2 (encoder only) **** davs2 (libdavs2; decoder only) *** AVS3-P2 (draft, IEEE1857.10) **** uavs3e (encoder only) **** uavs3d (decoder only)

Scalable

VP8,Scalable Video Coding (SVC) Extension for WebRTC - 4. Operational model
World Wide Web Consortium, September 26, 2020 VP9, AV1, and Versatile Video Coding, H.266/VVC support scalable modes by default. * Scalable Video Coding (H.264/SVC; an extension of Advanced Video Coding, H.264/MPEG-4 AVC) * Scalable High Efficiency Video Coding (SHVC; an extension of High Efficiency Video Coding, H.265/HEVC)

Intra-frame-only

* Motion JPEG **

** Morgan Multimedia M-JPEG ** Pegasus PICVideo M-JPEG ** MainConcept M-JPEG * ISO/IEC standard **

(ISO/IEC 15444-3, ITU-T T.802) *** libopenjpeg *** FFmpeg *** Morgan Multimedia M-JPEG2000 *** Morgan Multimedia dcpPlayer (decoder only) **

(ISO/IEC 21122) Lightweight Low latency video codec *** intoPIX fastTICO-XS ** DV (IEC 61834) *** FFmpeg ** MPEG-4 Part 2#Simple Studio Profile (SStP), MPEG-4 SStP (ISO/IEC 14496-2) *** FFmpeg ** Motion JPEG XR (ISO/IEC 29199-3, ITU-T T.833) * ProRes 422, Apple ProRes 422/4444 ** FFmpeg * Apple Intermediate Codec ** FFmpeg (decoder only) * Apple Pixlet ** FFmpeg (decoder only) * AVC-Intra ** x264 (encoder only) ** FFmpeg (decoder only) * AVC-Intra#AVC-Ultra, AVC-Ultra a subset of MPEG-4 AVC Hi444PP profile * XAVC-I * CineForm HD ** CineForm-SDK developed by GoPro (open source) ** FFmpeg * SMPTE standard ** VC-2 SMPTE standard (a.k.a. Dirac Pro. SMPTE ST 2042) *** Schrödinger *** dirac-research *** VC-2 Reference Encoder and Decoder developed by BBC (open source) *** FFmpeg (the encoder only supports VC-2 HQ profile) ** VC-3 SMPTE standard (SMPTE ST 2019) *** Avid DNxHD ***

** CineForm, VC-5 SMPTE standard (SMPTE ST 2073; a superset of CineForm HD) * Grass Valley (company), Grass Valley HQ/HQA/HQX ** Grass Valley Codec Option ** FFmpeg (decoder only) * NewTek NT25 * NewTek SpeedHQ - used in Network Device Interface (NDI) protocol ** NewTek Codec ** FFmpeg

Stereoscopic 3D

* Multiview Video Coding

Security and surveillance cameras

* Guobiao standards (GB/T) ** AVS-S-P2 (suspended) ** SVAC (GB/T 25724-2010) * Infinity CCTV Codec (IMM4/IMM5/IMM6) ** FFmpeg (IMM4 and IMM5 decoder only)

CD-ROM or CD-related video codecs

* CDXL codec ** FFmpeg (decoder only) * Cinepak (a.k.a. Apple Compact Video) ** FFmpeg * Photo CD codec ** FFmpeg (decoder only) * MovieCD, MotionPixels - used in MovieCD ** FFmpeg (decoder only) * CD+G (CD+Graphics) codec ** FFmpeg (decoder only) ** VLC (decoder only) * CD+G#Improvements, CD+EG (CD+Extended Graphics) codec

Network video codecs

* SMPTE RDD ** LLVC (Low Latency Video Codec; SMPTE RDD 34) - used in Networked Media Interface (NMI; SMPTE RDD 40) * High Efficiency Video Coding#Screen content coding extensions, HEVC-SCC (Screen Content Coding Extensions) * ZRLE (RFC 6143 7.7.6) - used by Virtual Network Computing, VNC *

's CellB video (RTP payload formats, RTP playload type 25) - used in Oracle Solaris, Solaris's SunVideo Plus and Lawrence Berkeley National Laboratory's vic (Video Conferencing Tool) * PARC (company), Xerox PARC's Network Video (nv; RTP payload formats, RTP playload type 28) - used in Xerox's nv and Lawrence Berkeley National Laboratory's vic (Video Conferencing Tool) * CU-SeeMe video codec * GoToMeeting codec ** FFmpeg (decoder only)

Bayer video codecs

* CinemaDNG (created by Adobe; used in Blackmagic Design, Blackmagic cameras) * Redcode RAW (used in Red Digital Cinema Camera Company, RED cameras) a modified version of JPEG 2000 ** libredcode * Arri Alexa#ArriRaw, ArriRaw (used in Arri cameras) * Cineform RAW (used in Silicon Imaging cameras) ** CineForm-SDK * Blackmagic RAW (used in Blackmagic Design, Blackmagic cameras) ** Blackmagic RAW SDK * Cintel RAW (used in Cintel Scanner) ** FFmpeg (decoder only) * Apple ProRes RAW * intoPIX TICO RAW ** intoPIX fastTICO-RAW SDK & TICO-RAW FPGA/ASIC libraries * Canon CRX - used in Canon Cinema Raw Light movie ** Canon RAW Plugin for Avid Media Access ** LibRaw (decoder only; open source)

Video games

* Bink Video, Smacker video ** FFmpeg ** libavcodec * Nintendo Nintendo European Research & Development#Mobiclip video codecs, Mobiclip video codec ** FFmpeg (decoder only) *

CRI Middleware#Sofdec, Sofdec codec - a MPEG variant with 11-bit DC and color space correction; used in Sofdec middleware * CRI P256 - used in Sofdec middleware for Nintendo DSCRI・ミドルウェア、ゲーム開発者向けブログ「CRIチャンネル」を開設
Impress Watch Corporation, April 19, 2007 * Indeo Video Interactive (aka Indeo 4/5) - used in PC games for Microsoft Windows ** FFmpeg (decoder only) ** Intel Indeo Video

Real-time

* Hap/Hap Alpha/Hap Q ** VIDVOX hap codec ** FFmpeg * DXV Codec ** Resolume DXV Codec ** FFmpeg (decoder only) * NotchLC ** FFmpeg (decoder only) * VESA Display Stream Compression (DSC) * VESA Display Compression-M (VDC-M)

References

{{DEFAULTSORT:Codecs Codecs, Technology-related lists, Codecs tr:Çözücü listesi

Audio compression formats

Non-compression

Lossless compression

Bluetooth lossless

Lossy compression

General/Speech hybrid

Neural audio codecs

General

= AES3

=Bluetooth

=Digital radio

Voice

=Microsoft DirectPlay

=Digital Voice Recorder

=Mobile phone

=Professional mobile radio

=Military

Video games

Text compression formats

Video compression formats

Non-compression

Analog signals

Lossless Lossless compression is a class of data compression that allows the original data to be perfectly reconstructed from the compressed data with no loss of information. Lossless compression is possible because most real-world data exhibits statistic ... video compression

Lossless game codecs

Lossy compression

General

Scalable

Intra-frame-only

Stereoscopic 3D

Security and surveillance cameras

CD-ROM or CD-related video codecs

Network video codecs

Bayer video codecs

Video games

Real-time

See also

References

Lossless Lossless compression is a class of data compression that allows the original data to be perfectly reconstructed from the compressed data with no loss of information. Lossless compression is possible because most real-world data exhibits statistic ...
video compression