Editing List of codecs (section)

====Voice====
{{Main|Speech coding}}
(low bit rate, optimized for speech)
* [[Linear predictive coding]] (LPC, used in most of the speech codecs listed below)
** [[Code-excited linear prediction]] (CELP)
*** [[Algebraic code-excited linear prediction]] (ACELP)
* [[Xiph.Org Foundation]]
** [[Speex]], patent free<ref>[http://www.digitalpreservation.gov/formats/fdd/fdd000259.shtml Speex Audio Codec, Version 1.2] [[Library of Congress]]</ref>
*** libspeex
*** FFmpeg (decoder only)
* [[Dialogic ADPCM]] (VOX)
** FFmpeg (decoder only)
* [[ITU]] standards:
** [[G.711]] ([[a-law]] and [[μ-law]] [[companding]]; 64&nbsp;kbit/s), also known as PCM of voice frequencies
*** [[Sun Microsystems]]'s [[public domain]] implementation<ref name="linuxcom-2005"/>
*** FFmpeg (libavcodec)
** [[G.711.0]] (G.711 LLC)
** [[G.711.1]] (Wideband extension for G.711; 64/80/96&nbsp;kbit/s)
** G.711.1D (Super-wideband extension for G.711.1; 96/112/128&nbsp;kbit/s)
** [[G.718]] (8/12/16/24/32&nbsp;kbit/s)
** G.718B (Super-wideband extension for G.718; 28–48&nbsp;kbit/s)
** [[G.719]]
** [[G.721]] (superseded by G.726; 32&nbsp;kbit/s)
*** [[Sun Microsystems]]'s public domain implementation<ref name="linuxcom-2005"/>
** [[G.722]] (SB-ADPCM; 48/56/64&nbsp;kbit/s)
*** FFmpeg
** G.722B (Super-wideband extension for G.722; 64/80/96&nbsp;kbit/s)
** G.722.2 ([[AMR-WB]])
*** 3GPP TS 26.173{{snd}} AMR-WB speech Codec (C-source code){{snd}} reference implementation<ref name="3gpp-amr-wb"/>
*** opencore-amr (decoder)
*** FFmpeg (decoder only)
** [[G.723]] (24 and 40&nbsp;kbit/s DPCM, extension to G.721, superseded by G.726)
*** [[Sun Microsystems]]'s public domain implementation<ref name="linuxcom-2005"/>
** [[G.723.1]] (MPC-MLQ or ACELP; 5.3/6.3&nbsp;kbit/s)
*** FFmpeg
** [[G.726]] (ADPCM; 16/24/32/40&nbsp;kbit/s)
*** [[Sun Microsystems]]'s public domain implementation<ref name="linuxcom-2005"/>
*** FFmpeg (libavcodec)
** [[G.727]]
*** [[Sun Microsystems]]'s public domain implementation<ref name="linuxcom-2005">[https://www.linux.com/news/finding-voice-codecs-free-software/ Finding voice codecs for free software]. Linux.com. October 14, 2005</ref>
** [[G.728]] (LD-CELP; 16&nbsp;kbit/s)
** [[G.729]] (CS-ACELP; 8&nbsp;kbit/s)
*** FFmpeg (decoder only)
** [[G.729a]]
** [[G.729b]]
** [[G.729ab]]
** G.729d (6.4&nbsp;kbit/s)
*** FFmpeg (decoder only)
** G.729e (11.8&nbsp;kbit/s)
** [[G.729.1]] (G.729 Annex J; Wideband extension for G.711; 8–32&nbsp;kbit/s)
** [[G.729.1E]] (Super-wideband extension for G.729.1)
* [[Google]]
** [[internet Speech Audio Codec]] (iSAC)
*** WebRTC
* [[Nellymoser Asao Codec]]
** FFmpeg (libavcodec)
* [[PictureTel Corp.|PictureTel]] PT716, PT716plus
* PictureTel PT724
* RTAudio{{snd}} used by [[Microsoft Live Communication Server]]
* [[SVOPC]]{{snd}} used by Skype
* OpenLPC{{snd}} created by Future Dynamics<ref name="linuxcom-2005"/>
** HawkVoice (libHVDI)
* ANSI/[[Society of Cable Telecommunications Engineers|SCTE]]
** ANSI/[[Society of Cable Telecommunications Engineers|SCTE]] 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]] (iLBC, RFC 3951){{snd}} developed by [[Global IP Solutions]]/Google
*** WebRTC
* IETF [[Internet Draft]]
** [[SILK]] (used by [[Skype]])<ref>[https://tools.ietf.org/html/draft-vos-silk-02 SILK Speech Codec - draft-vos-silk-02] IETF</ref>
** [[CELT]] (developed by [[Xiph.Org Foundation]])<ref>[https://tools.ietf.org/html/draft-valin-celt-codec-02 Constrained-Energy Lapped Transform (CELT) Codec - draft-valin-celt-codec-02] IETF</ref>
*** libcelt
* [[MPEG-4 Audio]]
** MPEG-4 CELP
** [[Harmonic Vector Excitation Coding|MPEG-4 HVXC]]
* Skyphone MPLP
* [[Inmarsat]]
** INMARSAT-M IMBE
** Inmarsat Mini-M AMBE
* [[Meta Platforms|Meta]] MLow - used in [[Instagram]], [[Facebook Messenger|Messenger]], and [[WhatsApp]].<ref>[https://techcrunch.com/2024/06/13/whatsapp-add-new-features-to-the-calling-experience-including-support-for-32-person-video-calls/ WhatsApp adds new features to the calling experience, including support for 32-person video calls]. TechCrunch. June 13, 2024</ref>

=====Microsoft DirectPlay=====
Those codecs are used by many PC games which use voice chats via Microsoft [[DirectPlay]] API.
* Voxware MetaVoice
** Windows Media Player (voxmvdec.ax)
* [[Truespeech]]
** 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]] / Standard Play (DSS-SP)
*** FFmpeg (decoding only)
** Digital Speech Standard / Quality Play (DSS-QP)
* Sony [[Long-term Predicted Excitation Coding|LPEC]]
* Truespeech Triple Rate CODER (TRC)<ref>{{Cite web | url=http://www.prnewswire.com/news-releases/dsp-group-unveils-total-telephony-solutionstm-for-digital-cordless-telephony-applications-73552597.html | access-date=June 24, 2015 | title=DSP Group Unveils Total Telephony Solutions(TM) For Digital Cordless Telephony Applications | archive-url=https://web.archive.org/web/20160823021751/https://www.prnewswire.com/news-releases/dsp-group-unveils-total-telephony-solutionstm-for-digital-cordless-telephony-applications-73552597.html | archive-date=August 23, 2016 | url-status=dead}}</ref>{{snd}} used in some pocket recorders
* {{interlanguage link|TDK-Micronas|de|TDK-Micronas|lt=Micronas}} Intermetall MI-SC4 - used by voice recorders such as [[RadioShack]] Digital Recorder<ref>RadioShack Digital Recorder OWNER'S MANUAL p.38. RadioShack. 2002.</ref> and {{interlanguage link|I-O DATA|ja|アイ・オー・データ機器}} HyperHyde<ref>[https://www.iodata.jp/lib/manual/pdf/45764_1_844_mdm-h2e_1.pdf HyperHyde Operation Manual]. p.40. I-O DATA. 2000.</ref>
** FFmpeg (decoder only)

=====Mobile phone=====

======Generation 2======
* [[ETSI|European Telecommunications Standards Institute]] (ETSI) [[Global System for Mobile Communications|GSM]]
** [[Full Rate]] (GSM 06.10, RPE-LTP)
*** libgsm
*** FFmpeg (decoder only)
** [[Half Rate]] (GSM 06.20, VSELP 5.6&nbsp;kbit/s)
** [[Enhanced Full Rate]] (GSM 06.60, ACELP 12.20&nbsp;kbit/s, compatible with AMR mode AMR_12.20)
* [[Telecommunications Industry Association]] (TIA) IS-95 (a.k.a. cdmaOne)
** IS-96A (QCELP 8&nbsp;kbit/s)
** IS-127 (EVRC 8&nbsp;kbit/s)
** IS-733 (QCELP 13&nbsp;kbit/s)
* [[Telecommunications Industry Association]] (TIA) IS-54/IS-136 (a.k.a. [[Digital AMPS]])
** IS-85 ([[Vector Sum Excited Linear Prediction|VSELP]] 8kbit/s)
*** ITU-T G.191's IS-54 implementation
** IS-641 (ACELP 7.4&nbsp;kbit/s, compatible with AMR mode AMR_7.40)
* [[Association of Radio Industries and Businesses]] (ARIB) RCR STD-27 ([[Personal Digital Cellular|PDC]])
** [[PDC-HR]] (PSI-CELP 3.45&nbsp;kbit/s)
** [[PDC-FR]] (VSELP 11.2&nbsp;kbit/s)
** [[PDC-EFR]] CS-ACELP 8&nbsp;kbit/s (a.k.a. G.729)
** [[PDC-EFR]] ACELP 6.7&nbsp;kbit/s (compatible with AMR mode AMR_6.70)

======Generation 3/4======
* [[3rd Generation Partnership Project]] (3GPP)
** [[Adaptive Multi-Rate]] (AMR)
*** [[AMR-NB]]
**** 3GPP TS 26.073{{snd}} AMR speech Codec (C-source code){{snd}} reference implementation<ref>3GPP (2008-12-11) [http://www.3gpp.org/ftp/Specs/archive/26_series/26.073/26073-800.zip 3GPP TS 26.073 - AMR speech Codec; version 8.0.0 Release 8], retrieved 2009-09-08.</ref>
**** 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)
*** [[AMR-WB]]
**** 3GPP TS 26.173{{snd}} AMR-WB speech Codec (C-source code){{snd}} reference implementation<ref name="3gpp-amr-wb"/>
**** opencore-amr (decoder), from OpenCORE (one may compile ffmpeg with—enable-libopencore-amrwb to incorporate the OpenCORE lib)
**** vo-amrwbenc (encoder), from [[VisualOn]], 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{{snd}} AMR-WB+ speech Codec (C-source code){{snd}} reference implementation<ref>3GPP (2008-12-18) [http://www.3gpp.org/ftp/Specs/archive/26_series/26.273/26273-800.zip 3GPP TS 26.273 - AMR-WB+ speech Codec; version 8.0.0 Release 8], retrieved 2009-09-09</ref>
*** [[Enhanced Voice Services]] (EVS)
**** 3GPP TS.26.443 – Codec for Enhanced Voice Services (EVS) – ANSI C code (floating-point)<ref>3GPP TS 26.443. [http://www.3gpp.org/DynaReport/26443.htm Codec for Enhanced Voice Services (EVS); ANSI C code (floating-point)].</ref>
* [[3rd Generation Partnership Project 2]] (3GPP2)
** [[Enhanced Variable Rate Codec]] (EVRC, a.k.a. IS-127){{snd}} based on [[Relaxed Code Excited Linear Prediction|RCELP]]
*** FFmpeg (decoder only)
** [[Enhanced Variable Rate Codec B]] (EVRC-B)
** [[QCELP]] (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]] (SMV)
** [[VMR-WB|Variable Multi Rate – WideBand]] (VMR-WB)

=====Professional mobile radio=====
* [[Association of Public-Safety Communications Officials-International|APCO]]
** [[Project 25]] Phase 2 Enhanced Full-Rate ([[Advanced Multi-Band Excitation|AMBE]]+2 4400bit/s with 2800bit/s FEC)
** [[Project 25]] Phase 2 Half-Rate (AMBE+2 2450bit/s with 1150bit/s FEC){{snd}} also used in NXDN and DMR
*** mbelib (decoder only)
** Project 25 Phase 1 Full Rate ([[Improved Multi-Band Excitation|IMBE]] 7200bit/s)
*** mbelib (decoder only)
* European Telecommunications Standards Institute ([[ETSI]])
** ETS 300 395-2 (TETRA [[Algebraic Code Excited Linear Prediction|ACELP]] 4.6kbit/s)
<!--*** Osmocom TETRA-->
* [[TETRAPOL]]
** RPCELP 6&nbsp;kbit/s
* [[D-STAR]] Digital Voice (AMBE 2400bit/s with 1200bit/s FEC)
** mbelib (decoder only)
* Professional Digital Trunking System Industry Association (PDT Alliance) standards:
** NVOC{{snd}} used in China
* [[Spirit DSP]] RALCWI
* DSPINI
** SPR Robust
** TWELP Robust
* [[Codec2]]
** libcodec2
* RL-CELP (used in Japanese railways<ref name="jica-philippines">[http://open_jicareport.jica.go.jp/pdf/12244661_01.pdf INFORMATION COLLECTION SURVEY FOR THE MEGA MANILA SUBWAY PROJECT IN THE REPUBLIC OF THE PHILIPPINES] [[Japan International Cooperation Agency]] September, 2015</ref><ref>[https://www.jreast.co.jp/development/tech/pdf_5/59-64.pdf 東北上越新幹線デジタル列車 無線システムの開発] {{in lang|ja}} [[East Japan Railway Company]] 2003</ref>)

=====Military=====
* [[United States Department of Defense|U.S. Department of Defense]] (DoD) Federal Standard:
** [[FS-1015]] (a.k.a. LPC-10)
*** HawkVoice (libHVDI)
** [[FS-1016]] ([[Code Excited Linear Prediction|CELP]])
*** HawkVoice (libHVDI)
** [[FS-1023]] ([[Continuously variable slope delta modulation|CVSD]] 12kbit/s)
* [[United States Military Standard]] (MIL-STD)
** [[MIL-STD-188]] 113 (CVSD 16&nbsp;kbit/s and 32&nbsp;kbit/s)
*** [[SoX]] (libsox)
** [[Mixed Excitation Linear Prediction#MIL-STD-3005|MIL-STD-3005]] (a.k.a. [[Mixed Excitation Linear Prediction|MELP]])
*** [[Texas Instruments]]' 2.4&nbsp;kbit/s MELP Proposed Federal Standard speech coder
* NATO
** STANAG 4198 (a.k.a. LPC-10e)
*** SpanDSP (open source)
** [[Mixed Excitation Linear Prediction#STANAG-4591 (NATO)|STANAG-4591]] (a.k.a. MELPe)
*** Microsoft Speech coder
* BBN NRV{{snd}} developed in [[DARPA]] program<ref>{{Cite book | doi=10.1109/MILCOM.2010.5680311 | isbn=978-1-4244-8178-1| chapter=300 BPS noise robust vocoder| title=2010 - Milcom 2010 Military Communications Conference| year=2010| last1=Obranovich| first1=Charles R.| last2=Golusky| first2=John M.| last3=Preuss| first3=Robert D.| last4=Fabbri| first4=Darren R.| last5=Cruthirds| first5=Daniel R.| last6=Aylward| first6=Erin M.| last7=Freebersyser| first7=James A.| last8=Kolek| first8=Stephen R.| pages=298–303| s2cid=8991597}}</ref>