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Comparison of audio coding formats

Summary

The following tables compare general and technical information for a variety of audio coding formats. For listening tests comparing the perceived audio quality of audio formats and codecs, see the article Codec listening test.

General informationEdit

Audio compression format Creator First public release date Latest stable version Cost Proprietary implementations (codecs) Open-source implementations (codecs) Uses
(other than consumer audio) 		Music reproduction (consumer audio) Telephony app Lossless audio compression Patented DRM
Encoder Player
AAC ISO/IEC MPEG Audio Committee 1997 ISO/IEC 14496-3 Non-free[1] FAAC (encoding only), Nero Digital Audio, Apple CoreAudio (via QuickTime, iTunes or afconvert[2]) FAAD2 (decoding only), FFmpeg, Audiocogs[3] (decoding only), Fraunhofer FDK AAC Digital TV service, Digital Radio, Internet streaming Yes AAC-LD/AAC-ELD MPEG-4 SLS Yes FairPlay (.m4p only, discontinued)
AC-3 Dolby Laboratories 1992 ATSC A52:2012 Free DVD players, digital television FFmpeg, liba52 (decoding only), Aften (encoding only), libavc (2.0 channels max) Theatrical movie presentation, Digital TV service & home-video (personal recorders, DVD, etc.) No No No No ?
ALAC Apple Inc. 2004-04-28 QuickTime 7.6 Free QuickTime, iTunes, RealPlayer MacOSforge, FFmpeg, Audiocogs[4] (decoding only) Music archival Yes No Yes Free Possible, but never implemented
ALS ISO/IEC MPEG Audio Committee 2005 ISO/IEC 14496-3 Free MPEG-4 ALS FFmpeg (decoding only) - Yes No Yes Yes ?
AMBE Digital Voice Systems ? ? Non-free ? mbelib Low bandwidth HF/VHF digital radio, VoIP trunking No No No Yes ?
AMR 3GPP 1999-06-22 ETSI TS 126 071 V9.0.0 (2009) Non-free[5][6] QuickTime, RealPlayer FFmpeg (decoding only), FFmpeg with OpenCORE libraries,[7] Android[8] voice recording No Yes No Yes No
AMR-WB
(G.722.2) 		3GPP 2001-04-10 ETSI TS 126 190 V8.0.0 (2009-01) Non-free Non-free QuickTime, RealPlayer FFmpeg (decoding only),[7] FFmpeg with VisualOn libraries, Android (decoding only),[8] opencore-amr for both encoding and decoding voice recording No Yes No Yes No
AMR-WB+ 3GPP 2004-06-14 ETSI TS 126 290 V8.0.0 (2009-01) Non-free[9][10] Non-free[9][10] ? ? voice recording Yes Yes No Yes No
aptX Qualcomm 1989 2007 Non-free Non-free Broadcast audio codecs: 2wcom systems, Systembase, APT, AVT, Harris Corporation, MAYAH, Prodys, Qbit; wireless headphones: iSkin, JayBird Gear, DTS discs for movies FFmpeg Low latency Studio/transmitter link, Bluetooth A2DP stereo, digital wireless microphone Yes No No Yes No
ATRAC Sony Corp. 1991 ATRAC3plus Non-free Non-free MiniDisc, Walkman, VAIO, Clie, PlayStation 3, PlayStation Portable, SDDS, SonicStage, SoundForge, RealPlayer, ConnectPlayer FFmpeg (decoding only, ATRAC Advanced Lossless is only partially supported) voice recording, theatrical movie presentation Yes No Yes Yes Yes
BroadVoice (BV16, BV32) Broadcom 2009-08-19 1.2 Free Free ? ? Speech, VoIP, Low latency, voice recording No Yes No Free No
CELT Xiph.Org Foundation, Jean-Marc Valin 2007-12-08 0.11.1 (merged into Opus) Free Free ? libcelt, FFmpeg with libcelt library (decoding only) Speech, VoIP, Low latency, Studio/transmitter link, wireless audio Yes Yes No No No
Codec2 David Rowe 2010 Developmental Free Free ? c2enc, c2dec Low bandwidth HF/VHF digital radio, VoIP trunking No Yes No No No
Enhanced AC-3 (E-AC-3) Dolby Laboratories ? ATSC A52:2012 Non-free Non-free Digital television FFmpeg Theatrical movie presentation, digital TV service & home-video (personal recorders, DVD, etc.) No No No Yes Yes
EVS Fraunhofer, JVC Kenwood , NTT, NTT Docomo, Panasonic, Ericsson 2014 ? Non-free ? ? ? ? Yes Yes No Yes No
FLAC Xiph.Org Foundation, Josh Coalson 2001-07-20 1.3.3

(2019-08-04)

Free Free FLAC,[11] Flake[12] (encoding only), FFmpeg, FLACCL[13] (encoding only), Audiocogs[14] (decoding only) Music archival[15] Yes No Yes No No
G.711 ITU-T 1972 (ITU-T standard from 1988) G.711 Appendix II (02/00) Free Free Various proprietary VoIP software FFmpeg, Ekiga, Asterisk (PBX) and almost any VoIP software voice recording No Yes No No No
G.722 ITU-T 1988-11 Free Free Various proprietary VoIP software Asterisk (PBX), QuteCom, FFmpeg voice recording No Yes No No No
G.722.1 ITU-T 1999-09 G.722.1 (05/05) Free[16][17] Free[16][17] Various proprietary VoIP software FreeSWITCH,[18] PJSIP, etc voice recording No Yes No Yes No
G.722.2
(AMR-WB) 		ITU-T (adopted directly from 3GPP) 2002-01 G.722.2 (07/03) Non-free Non-free QuickTime, RealPlayer FFmpeg (decoding only),[7] FFmpeg with VisualOn libraries, Android (decoding only)[8] voice recording, audio No No No Yes No
G.723.1 ITU-T 1996-03 G.723.1 (05/06) Non-free Non-free Various proprietary VoIP software FFmpeg voice recording No Yes No Yes No
G.726 ITU-T 1990-12 Free Free Various proprietary VoIP software FFmpeg, Ekiga and other VoIP software voice recording No Yes No No No
G.728 ITU-T 1992-09 Non-free Non-free Various proprietary VoIP software voice recording No Yes No Yes No
G.729 ITU-T 1996-03 G.729 (06/12) Free[19] Free Various proprietary VoIP software FFmpeg (decoding only) voice recording No Yes No Expired[19] No
G.729.1 ITU-T 2006-05 G.729.1 Am.8 (03/13) Free[19] Free Various proprietary VoIP software voice recording, DECT telephony No Yes No No No
GSM-FR ETSI Special Mobile Group 1990-1994 (ETS 300 580-2) ETSI EN 300 961 V8.1.1 (2000–11) Free Free FFmpeg (decoding only), FFmpeg with external library libgsm, Ekiga and other VoIP software voice recording No Yes No ? No
HE-AAC ISO/IEC MPEG Audio Committee 2003 ISO/IEC 14496-3 ? ? ? ? ? Yes No No ? ?
iLBC Global IP Solutions 2002 RFC 3951 Free Free Cisco IP Communicator,[20] old versions of Skype[21] Ekiga, Asterisk (PBX) and other VoIP software, FFmpeg with libilbc library voice recording No Yes No Free[22] No
iSAC Global IP Solutions ? Free Free Yahoo! Messenger WebRTC voice recording No Yes No Yes[23] ?
Monkey's Audio Matthew T. Ashland 2000 7.33

(2022-02-09)

Free Free Monkey's Audio FFmpeg (decoding only) Music Archival Yes No Yes No No
MP2 (MPEG-1, 2 Audio Layer II) ISO/IEC MPEG Audio Committee 1993 ISO/IEC 11172-3, ISO/IEC 13818-3 Free[24] Free[24] various DVD software, video software, audio software TooLAME (encoding only), TwoLAME (encoding only), FFmpeg DAB, DVB, DVD Yes No No Free[25] ?
MP3 ISO/IEC MPEG Audio Committee 1993 ISO/IEC 11172-3, ISO/IEC 13818-3 Free Free FhG, l3enc, MP3enc, (old implementations: Xing TOMPG, SCMPX) LAME (encoding only), FFmpeg (decoding only), libmad (decoding only), Audiocogs[26] (decoding only), (old implementations: BladeEnc) - Yes No No No[27] Yes (optional, rarely used)
Musepack Frank Klemm/MDT 1997 1.30

(2009-04-02)

Free Free Musepack,[28] FFmpeg (decoding only) - Yes No No No No
Nellymoser Asao Nellymoser Inc. 2002 ? Non-free Non-free Adobe Flash, Flash Player FFmpeg voice recording No No No Yes ?
Opus Xiph.Org Foundation, Internet Engineering Task Force 2012-09-11 RFC 6716 (libopus 1.3) Free Free libopus, FFmpeg Speech, VoIP, Low latency, Studio/transmitter link, wireless audio, voice recording, WebRTC Yes Yes No Free[29] No
SBC Bluetooth SIG 2003 A2DP 1.3 (2012-07-24) Free for Bluetooth Free for Bluetooth A2DP BlueZ, FFmpeg Bluetooth audio Yes No No Yes No
Shorten Tony Robinson 1993-03-30 3.6.1

(2007-03-19, final release)

Free Free Shorten FFmpeg (decoding only) - Yes No Yes No (with commercial use restriction)[30][31] No
SILK Skype Limited 2009-01-07 Merged into Opus Free Free Skype SILK Speech Codec voice recording No Yes No Yes ?
Siren 7 PictureTel Corp. (now Polycom Inc.) 1999 ?[16][17] ?[16][17] Microsoft Office Communicator FreeSWITCH (libg722_1,[32] aMSN (libsiren - part of libmsn)[33][34] voice recording No Yes No Yes ?
Speex Xiph.Org Foundation, Jean-Marc Valin 2003-03-24 1.2.0 (obsoleted by Opus) Free Free Adobe Flash Player 10 Speex,[35] FFmpeg with libspeex library voice recording No Yes No No No
SVOPC Skype Limited 2007 ? ? Skype voice recording No Yes No Yes ?
True Audio (TTA) TAU Software 1999 2.3

(2015-02-24)

Free Free TTA,[36] FFmpeg - Yes No Yes No No
TwinVQ Nippon Telegraph and Telephone 1996 (?) Non-free Non-free Winamp with VQF plugin, NTT TwinVQ player/encoder, Yamaha SoundVQ player, Nero Media Player FFmpeg (decoding only)[37] speech Yes No No Yes ?
Vorbis (Ogg) Xiph.Org Foundation 2000-05-11 1.3.7 Free Free libvorbis,[38] aoTuV,[39] FFmpeg - Yes No No No No
WavPack Conifer Software 1998 5.4.0

(2021-01-10)

Free Free WavPack,[40] FFmpeg Music archival Yes No Yes No No
Windows Media Audio Microsoft 1999 11.0 Free for
consumer
licensees
of the
Windows
operating
system
[citation needed]		 Free for
licensees
of the
Windows
operating
system[41]		 Windows Media Player, Windows Media Encoder FFmpeg (decoding only for Pro, Lossless and Voice) internet streaming Yes No Yes Yes Optional[42]
Audio compression format Creator First public release date Latest stable version Encoder Player Proprietary implementations (codecs) Open-source implementations (codecs) Uses
(other than consumer audio) 		Music reproduction (consumer audio) Telephony app Lossless audio compression Patented DRM
cost

NotesEdit

  1. The 'Music' category is merely a guideline on commercialized uses of a particular format, not a technical assessment of its capabilities. (For example, in terms of marketshare, MP3 and AAC dominate the personal audio market, though many other formats are comparably well suited to fill this role from a purely technical standpoint.)
  2. First public release date is first of either specification publishing or source releasing, or in the case of closed-specification, closed-source codecs, is the date of first binary releasing. Many developing codecs have pre-releases consisting of pre-1.0 versions and perhaps 1.0 release candidates (RCs), although 1.0 may not necessarily be the release version.
  3. Latest stable version is that of specification or reference tools.
  4. If there happens to be OSI licensed software available for a particular format, this does not necessarily permit one to use said codec free of charge. Likewise, if there is only proprietary licensed software available for a particular format, one might be able to use the codec free of charge.

Operating system supportEdit

Codec Windows macOS Linux BSD Unix Palm OS Symbian OS Rockbox iOS Android[43] Chromium[44]
AAC Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes
AC-3 Yes ? Yes ? ? ? ? ? Yes ? ?
ALAC Yes Yes Yes Yes Yes No No Yes Yes No No
ALS ? ? ? ? ? ? ? ? ? ? ?
aptX Yes Yes Yes Yes Yes No No No No Yes No
CELT Yes Yes Yes Yes Yes Yes No Yes No No No
E-AC3 Yes Yes Yes Yes Yes ? ? ? Yes ? ?
FLAC Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes
Monkey's Audio Yes Yes Yes Yes Yes No No Yes No No No
MP3 Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes
Musepack Yes Yes Yes Yes Yes Yes Yes Yes No No No
Opus Yes Yes Yes Yes Yes No No Yes Yes Yes Yes
RealAudio[45] Yes Yes Yes Yes Yes Yes Yes Yes No No No
Speex Yes Yes Yes Yes Yes Yes Yes Yes No No No
Vorbis Yes Yes Yes Yes Yes Yes Yes Yes ? Yes Yes
True Audio (TTA) Yes Yes Yes Yes Yes Yes Yes Yes ? Yes Yes
WavPack Yes Yes Yes Yes Yes Yes Yes Yes ? No No
WMA[45] Yes Yes[46] Yes Yes Yes Yes Yes Yes ? Yes No

Multimedia frameworks supportEdit

Audio compression format ACM DirectShow QuickTime GStreamer FFmpeg Media Foundation
8SVX Yes (ffdshow) Yes (ffdshow) Yes (Perian) Yes (GStreamer FFmpeg plug-in) Yes Yes (ffdshow)
AAC Yes Yes (ffdshow, Monogram[47]) Yes Yes (GStreamer FFmpeg plug-in) Yes Yes
AC3 Yes Yes (ffdshow) Yes (Perian) Yes (GStreamer FFmpeg plug-in) Yes Yes
ALS ? ? ? ? ? ?
AMR No No Yes

[48][49]

 Yes (GStreamer Ugly Plug-ins) Yes Yes
ALAC Yes Yes (ffdshow) Yes Yes (GStreamer FFmpeg plug-in) Yes Yes
aptX ? ? ? ? Yes ?
ATRAC3 Yes (ffdshow) Yes (ffdshow) Yes (Perian) Yes (GStreamer FFmpeg plug-in) Yes Yes (ffdshow)
ATRAC3plus No No No No Yes Yes (ffdshow)
CELT ? ? ? ? ? ?
Cook Codec Yes (ffdshow) Yes (ffdshow) Yes (Perian) Yes (GStreamer FFmpeg plug-in) Yes Yes (ffdshow)
DCA aka DTS Yes (ffdshow) Yes (ffdshow) Yes (Perian) Yes (GStreamer FFmpeg plug-in) Yes Yes (ffdshow)
DTS-HD Yes (ffdshow) Yes (ffdshow) Yes (Perian) Yes (GStreamer FFmpeg plug-in) Yes Yes (ffdshow)
E-AC-3 Yes Yes (ffdshow) Yes (Perian) Yes (GStreamer FFmpeg plug-in) Yes Yes
FLAC yes Yes (ffdshow) Yes (Perian) Yes (GStreamer Base Plug-ins, GStreamer FFmpeg plug-in) Yes Yes
HE-AAC ? ? ? ? ? ?
Monkey's Audio Yes (ffdshow) Yes (ffdshow) Yes (Perian) Yes (GStreamer FFmpeg plug-in) Yes Yes (ffdshow)
WavPack Yes (ffdshow) Yes (ffdshow) Yes (Perian) Yes (GStreamer FFmpeg plug-in) Yes Yes (ffdshow)
Shorten Yes (ffdshow) Yes (ffdshow) Yes (Perian) Yes (GStreamer FFmpeg plug-in) Yes Yes (ffdshow)
Sonic Audio Yes (ffdshow) Yes (ffdshow) Yes (Perian) Yes (GStreamer FFmpeg plug-in) Yes Yes (ffdshow)
MP3 Yes Yes Yes Yes (GStreamer Ugly, GStreamer FFmpeg plug-in) Yes Yes
RealAudio Yes (ffdshow) Yes (ffdshow) Yes (Perian) Yes (GStreamer FFmpeg plug-in, GStreamer DLL loader plugin + Binary Codec Packages) Yes Yes (ffdshow)
Speex Yes (ffdshow) Yes (ffdshow) Yes (Perian) Yes (GStramer Good Plug-ins, GStreamer FFmpeg plug-in) Yes Yes (ffdshow)
Vorbis Yes (ffdshow) Yes (ffdshow) Yes (Perian) Yes (GStreamer Base Plug-ins, GStreamer FFmpeg plug-in) Yes Yes (ffdshow)
La ??? No No No No No Yes (ffdshow)
LPAC No No No No No Yes (ffdshow)
Windows Media Audio v1 Yes Yes Yes (Perian) Yes (GStreamer FFmpeg plug-in) Yes Yes
Windows Media Audio v2 Yes Yes Yes (Perian) Yes (GStreamer FFmpeg plug-in) Yes Yes
Windows Media Audio Pro Yes Yes Yes (Perian) Yes (GStreamer FFmpeg plug-in) Yes Yes
Windows Media Audio Lossless Yes Yes Yes (flip4mac) Yes (GStreamer FFmpeg plug-in) Yes Yes
Windows Media Audio Voice Yes Yes No No Yes Yes
Musepack Yes (ffdshow) Yes (ffdshow, Monogram[47]) Yes (Perian) Yes (GStreamer FFmpeg plug-in) Yes Yes (ffdshow)
Meridian Lossless Packing Yes (ffdshow) Yes (ffdshow) Yes (Perian) Yes (GStreamer FFmpeg plug-in) Yes Yes (ffdshow)
Nellymoser Asao Codec in Flash Yes (ffdshow) Yes (ffdshow) Yes (Perian) Yes (GStreamer FFmpeg plug-in) Yes Yes (ffdshow)
OptimFROG No No No No No Yes (ffdshow)
Truespeech Yes Yes Yes (Perian) Yes (GStreamer FFmpeg plug-in) Yes Yes (ffdshow)
True Audio (TTA) Yes (ffdshow) Yes (ffdshow) Yes (Perian) Yes (GStreamer FFmpeg plug-in) Yes Yes (ffdshow)
QCELP Yes (ffdshow) Yes (ffdshow) Yes Yes (GStreamer FFmpeg plug-in) Yes Yes (ffdshow)
Audio compression format ACM DirectShow QuickTime GStreamer FFmpeg Media Foundation

Technical detailsEdit

Lossy formats
Audio compression format Algorithm Sample rate Bit rate Latency CBR VBR Stereo Multichannel
AAC MDCT, Hybrid Subband (AAC-HE) 8–192 kHz[50] 8–529 kbit/s (stereo) 20–405 ms[51] Yes Yes Yes: Dual, Mid/Side, Intensity, Parametric Yes: Up to 48 channels
AC3 MDCT 32, 44.1, 48 kHz 32–640 kbit/s 32–48 ms Yes No Yes Yes: Up to 6 channels
AMBE ? 8 kHz 2, 9.6 kbit/s ? ? ? ? ?
AMR ACELP 8 kHz 4.75, 5.15, 5.90, 6.70, 7.40, 7.95, 10.20, 12.20 kbit/s 25 ms Yes Yes No No
AMR-WB
(G.722.2) 		ACELP 16 kHz 6.60, 8.85, 12.65, 14.25, 15.85, 18.25, 19.85, 23.05, 23.85 kbit/s 25 ms Yes Yes Yes: only in MPEG-4 Part 12 container No
AMR-WB+ ACELP 8, 11.025, 16, 22.05, 32, 44.1, 48 kHz 6–36 kbit/s (mono)
7–48 kbit/s (stereo) 		60–90 ms Yes Yes Yes No
aptX Subband ADPCM 24–48 kHz (stereo) 192–384 kbit/s (stereo) 2 ms Yes (4:1) No Yes Yes: Up to 8 channels
ATRAC1 MDCT-Hybrid Subband 44.1 kHz 292 kbit/s >100 ms Yes No Yes: Dual Only No
ATRAC3 MDCT-Hybrid Subband 44.1 kHz 66, 105, 132, 146, 176, 264, 352 kbit/s >100 ms Yes No Yes: Dual (LP2), Mid/Side (LP4) No
ATRAC3plus MDCT-Hybrid Subband 44.1 kHz 48–352 kbit/s >100 ms Yes ? Yes Yes: Up to 6 channels
BroadVoice (BV16, BV32) Two-Stage Noise Feedback Coding (TSNFC) 8, 16 kHz 16, 32 kbit/s[52] 5 ms Yes No No No
Codec2 Speech 8 kHz 0.7, 1.2, 1.3, 1.4, 1.6, 2.4, 3.2 kbit/s 20–40 ms Yes No No No
E-AC3 MDCT 32, 44.1, 48 kHz 32–6144 kbit/s 5.33–48 ms Yes No Yes Yes: Up to 15 channels
E-aptX Subband ADPCM 15–48 kHz 60, 384, 767, 1024 kbit/s, 1.28 Mbit/s ? Yes (4:1) No Yes Yes: Up to 8 channels
GSM-HR VSELP 8 kHz 5.6 kbit/s 25 ms Yes No No No
GSM-FR RPE-LTP 8 kHz 13 kbit/s 20–30 ms Yes No No No
GSM-EFR ACELP 8 kHz 12.2 kbit/s 20–30 ms Yes No No No
HE-AAC ? 22 ~ 96 kHz 16 ~ 80 kbit/s ? Yes Yes Yes: Dual, Mid/Side, Intensity, Parametric Yes: Up to 48 channels
HVXC Speech 8 kHz 2, 4 kbit/s 36 ms Yes Yes No No
iLBC Block Independent LPC 8 kHz 13.33, 15.20 kbit/s 25, 40 ms Yes No No No
iSAC Transform coding 16, 32 kHz 10–52 kbit/s 33, 63 ms Yes Yes No No
MP3 (MPEG-1, 2, 2.5 Audio Layer III) MDCT, Hybrid Subband 8, 11.025, 12, 16, 22.05, 24, 32, 44.1, 48 kHz 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160, 192, 224, 256, 288, 320 kbit/s >100 ms Yes Yes Yes: Dual, Mid/Side, Intensity No
MPEG-1 Audio Layer II (MP2) Subband 32, 44.1, 48 kHz 32, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 384 kbit/s Yes Yes: but decoders are not required to support it Yes: Dual, Intensity No
MPEG-2 Audio Layer II (MP2) Subband 16, 22.05, 24 kHz[53][54] 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160 kbit/s[53] Yes Yes: but decoders are not required to support it Yes Yes: up to 5 full range audio channels and an LFE-channel with MPEG Multichannel
Musepack Subband 32, 37.8, 44.1, 48 kHz 20–350 kbit/s ? No Yes Yes Yes: Up to 8 channels
Opus MDCT, LPC, LTP 8–48 kHz 6–510 kbit/s 5–66.5 ms Yes Yes Yes Yes: Up to 255 channels[55]
RealAudio MDCT Varies (see article) Varies (see article) Varies Yes Yes Yes Yes: Up to 6 channels
SILK LPC, LTP 8, 12, 16, 24 kHz 6–40 kbit/s 25 ms Yes ? ? ?
Siren 7 Derived from PT716plus, MLT 16 kHz 16, 24, 32 kbit/s 40 ms Yes No No No
Siren 14 MLT 32 kHz 24, 32, 48 kbit/s (mono)
48, 64, 96 kbit/s (stereo) 		40 ms Yes No Yes No
Siren 22 MLT 48 kHz 32, 48, 64 kbit/s (mono)
64, 96, 128 kbit/s (stereo) 		40 ms Yes No Yes No
Speex CELP 8, 16, 32, (48) kHz 2.15–24.6 kbit/s (NB)
4–44.2 kbit/s (WB) 		30 ms (NB)
34 ms (WB) 		Yes Yes Yes: Intensity Yes
VMR-WB ACELP 16 kHz 8.55, 4.0, 0.8, 13.3, 6.2, 2.7, 1.0 kbit/s 33.75 ms Yes Yes ? ?
Vorbis (Ogg) MDCT 8–192 kHz 45-500 kbit/s (32-500 kbit/s for aoTuV tunings) >100 ms Yes/ABR Yes Yes: Dual, Lossless, Phase, Point (Intensity) Yes: Up to 255 channels
WavPack Lossy Prediction, Quantization 1 Hz to 16.777216 MHz 196 kbit/s and up in lossy mode (for CD audio) 3523.8 ms Yes Yes Yes Yes: Up to 256 channels
Windows Media Audio Standard MDCT 8, 11.025, 16, 22.05, 32, 44.1, 48 kHz 8–768 kbit/s >100 ms Yes Yes Yes No
Windows Media Audio Pro MDCT 8, 11.025, 16, 22.05, 32, 44.1, 48, 88.2, 96 kHz 4–768 kbit/s >100 ms Yes Yes Yes Yes: At least 8 channels, expandable
Lossless formats
Audio compression format Algorithm Sample rate Bits per sample Latency Stereo Multichannel
ALAC Lossless 1–384000 Hz 16, 20, 24, 32[56] ? Yes Yes: Up to 8 channels
ALS Lossless 0–4 GHz 8, 16, 24, 32 (int or float) ? Yes Yes: Up to 65536 channels
ATRAC Advanced Lossless ? ? ? ? ? ?
Dolby TrueHD Lossless 48, 96, 192 kHz 16, 20, 24 ? Yes Yes: 5.1, 7.1, and Dolby Atmos object-based audio[57]
DTS-HD Master Audio Lossless Up to 192 kHz ? ? Yes Yes: Up to 7.1[58]
FLAC Lossless 1–655350 Hz 4, 8, 16, 20, 24, 32 [59] 4.3–92 ms (46.4 ms typical) Yes Yes: Up to 8 channels
HD-AAC ? ? ? ? ? ?
Monkey's Audio Lossless 1–655350 Hz[citation needed] 8, 16, 24 1670 to 26,749 ms (varies with compression) Yes Yes: Up to 8 channels since version 4.86[60]
OptimFROG ? ? ? ? ? ?
OSQ ? ? ? ? ? ?
RealAudio Lossless Lossless Varies (see article) Varies (see article) Varies Yes Yes: Up to 6 channels
True Audio (TTA) Lossless 0–4 GHz 1 to > 64 approx. 1045 ms[61] Yes Yes: Up to 65535 channels
WavPack Lossless Lossless, Hybrid 1 Hz to 16.777216 MHz Varies in lossless mode; supports 32-bit float input; 2.2 minimum in lossy mode ? Yes Yes: Up to 256 channels
Windows Media Audio Lossless Lossless 8, 11.025, 16, 22.05, 32, 44.1, 48, 88.2, 96 kHz 16, 24 >100 ms Yes Yes: Up to 6 channels
ITU-T formats
Audio compression format Algorithm Sample rate Bit rate Bits per sample Latency CBR VBR Stereo Multichannel
G.711 companding A-law or μ-law, PCM 8 kHz 64 kbit/s 8 bit (log) 125 µs (typical) Yes No No No
G.711.0 Lossless compression of G.711 8 kHz 0.2–65.6 kbit/s 8 bit (log) 5–40 ms No Yes No No
G.711.1 MDCT, A-law, μ-law 8, 16 kHz 64, 80, 96 kbit/s 16 bit 11.875 ms Yes Yes No No
G.718 CELP, MDCT, Lossy 8, 16 kHz 8, 12, 12.65, 16, 24, 32 kbit/s 16 bit 42.875–43.875 ms Yes Yes No No
G.718B CELP, MDCT, Lossy, Sinusoidal Coding 32 kHz 36, 40, 48 kbit/s 16 bit 49.625 ms Yes Yes No No
G.719 MDCT,[62] Lossy (incorporates elements of Siren Codec and Ericsson technology) 48 kHz 32–88 kbit/s in 4 kbit/s steps, 88–128 kbit/s in 8 kbit/s steps 16 bit 40 ms Yes No Yes: only in MPEG-4 Part 12 container Yes: only in MPEG-4 Part 12 container
G.721 ADPCM, Lossy 8 kHz 32 kbit/s 13 bit Yes No No No
G.722 sub-band ADPCM, Lossy 16 kHz 64 kbit/s
(comprises 48, 56 or 64 kbit/s audio and 16, 8 or 0 kbit/s auxiliary data) 		14 bit 4 ms Yes No No No
G.722.1 Modulated Lapped Transform (MDCT), Lossy (based on Siren Codec) 16 kHz 24, 32 kbit/s 16 bit 40 ms Yes No No No
G.722.1C Modulated Lapped Transform (MDCT), Lossy (based on Siren Codec) 32 kHz 24, 32, 48 kbit/s 16 bit 40 ms Yes No No No
G.722.2 (AMR-WB) multi-rate wideband ACELP, Lossy 16 kHz 6.60, 8.85, 12.65, 14.25, 15.85, 18.25, 19.85, 23.05, 23.85 kbit/s 14 bit 25 ms Yes Yes Yes: only in MPEG-4 Part 12 container No
G.723 ADPCM, Lossy 8 kHz 24, 40 kbit/s 13 bit Yes No No No
G.723.1 MP-MLQ, ACELP, Lossy 8 kHz 5.3, 6.3 kbit/s 13 bit 37.5 ms Yes No No No
G.726 ADPCM, Lossy 8 kHz 16, 24, 32, 40 kbit/s 13 bit 125 µs Yes No No No
G.727 ADPCM, Lossy 8 kHz 16, 24, 32, 40 kbit/s 13 bit Yes Yes No No
G.728 low-delay CELP, Lossy 8 kHz 16 kbit/s 13 bit 0.625 ms Yes No No No
G.729 CS-ACELP, Lossy 8 kHz 8 kbit/s 13 bit 15 ms Yes No No No
G.729D CS-ACELP, Lossy 8 kHz 6.4 kbit/s 13 bit Yes No No No
G.729E CS-ACELP, Lossy 8 kHz 11.8 kbit/s 13 bit 15 ms Yes No No No
G.729.1 CELP, TDBWE, TDAC (MDCT), Lossy 8, 16 kHz 8 kbit/s, 12–32 kbit/s in 2 kbit/s steps 16 bit 48.9375 ms Yes Yes No No

NotesEdit

  • The latency listed here is the total delay (frame size, plus all lookahead) at the normal operating sample rate (typically 44.1 kHz).
  • Lossless compression will have a variable bit rate.

See alsoEdit

ReferencesEdit

  1. ^ "License Fees - Via Corp". www.vialicensing.com. Archived from the original on 16 January 2012. Retrieved 6 May 2017.
  2. ^ afconvert(1) Manual Page - Apple Developer, retrieved 2015-05-17
  3. ^ AAC.js at the audiocogs website, retrieved 2013-08-03
  4. ^ ALAC.js at the audiocogs website, retrieved 2013-08-03
  5. ^ VoiceAge Corporation (2007-10-14). "AMR Licensing Terms". Archived from the original on 2007-10-14. Retrieved 2009-09-12.
  6. ^ VoiceAge Corporation (June 2007). "AMR Licensing Terms". VoiceAge Corporation. Archived from the original on 2007-10-14. Retrieved 2009-09-12.
  7. ^ a b c FFmpeg General Documentation - AMR external library, Retrieved on 2009-07-08
  8. ^ a b c Android AMR codecs Archived February 18, 2009, at the Wayback Machine, Retrieved on 2009-07-08
  9. ^ a b VoiceAge Corporation (2007-10-14). "AMR-WB+ Licensing Terms". Archived from the original on 2007-10-14. Retrieved 2009-09-12.
  10. ^ a b VoiceAge Corporation (November 2006). "AMR-WB+ Licensing Terms". VoiceAge Corporation. Archived from the original on 2007-10-14. Retrieved 2009-09-12.
  11. ^ FLAC website, Retrieved 2013-08-03
  12. ^ Flake website, Retrieved 2010-12-17
  13. ^ FLACCL website, Retrieved 2013-08-03
  14. ^ FLAC.js at the audiocogs website, retrieved 2013-08-03
  15. ^ "FLAC (Free Lossless Audio Codec), Version 1.1.2". www.loc.gov. December 21, 2015.
  16. ^ a b c d Polycom, Inc. "Siren7/Siren14/G.719 License Agreement". Polycom, Inc. Archived from the original on 2014-07-09. Retrieved 2014-07-16.
  17. ^ a b c d Polycom, Inc. "Polycom Siren/Codecs FAQs - What are the terms on the free license?". Polycom, Inc. Archived from the original on 2014-07-09. Retrieved 2014-07-16.
  18. ^ "Browse FreeSWITCH / FreeSWITCH - Stash". stash.freeswitch.org. Retrieved 6 May 2017.
  19. ^ a b c "Most Licensed Patents under the G.729 Consortium have expired". Archived from the original on 2017-02-02. Retrieved 2017-12-22.
  20. ^ Cisco IP Communicator 7.0 Data sheet - support for iLBC Retrieved on 2009-07-08
  21. ^ Skype Community, Current Codec Uses Archived July 16, 2011, at the Wayback Machine, Retrieved on 2009-07-08
  22. ^ "IPR Details - Google Inc.'s Statement about IPR related to RFC 3951 and RFC 3952". datatracker.ietf.org. Retrieved 6 May 2017.
  23. ^ "Additional IP rights grant - WebRTC". sites.google.com. Retrieved 6 May 2017.
  24. ^ a b FFmpeg/Libavcodec, numerous others, see Open Source implementations FFMPEG formats
  25. ^ Kuro5hin.org (2008-07-20) Patent Status of MPEG-1,H.261 and MPEG-2, Retrieved 2009-09-05
  26. ^ JSMad at the audiocogs website, retrieved 2013-08-03
  27. ^ But see the main MP3 article for full details on MP3 licensing.
  28. ^ Musepack website, Retrieved 2009-09-01
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  30. ^ "Shorten Lossless Audio Compression Format (SHN), Version 3.5.1". www.digitalpreservation.gov. 25 February 2011. Retrieved 6 May 2017.
  31. ^ "Shorten Software License". Retrieved 6 May 2017.
  32. ^ freeswitch.org libg722_1 - README, Retrieved 2014-07-16
  33. ^ "Libmsn - is a reusable, open-source, fully documented library for connecting to Microsoft's MSN Messenger service". Libmsn project at Sourceforge.net. 2009. Retrieved 2009-09-07.
  34. ^ KaKaRoTo (2008-02-12) MSN Protocol documentation Archived 2013-05-24 at the Wayback Machine, Pidgin.im mailinglist, Retrieved 2009-09-08
  35. ^ Speex website, Retrieved 2009-09-01
  36. ^ TAU Software website, Retrieved 2009-09-01
  37. ^ FFmpeg (2009-08-24) News - August 24, 2009 - TwinVQ decoding in upcoming stable version, Retrieved 2009-10-07
  38. ^ Vorbis website Archived 2008-11-21 at the Wayback Machine, Retrieved 2009-09-01
  39. ^ aoTuV website Archived 2010-05-22 at the Wayback Machine, Retrieved 2009-09-01
  40. ^ WavPack website, Retrieved 2009-09-01
  41. ^ https://www.microsoft.com/windows/windowsmedia/licensing/licensing.aspx
  42. ^ https://www.microsoft.com/windows/windowsmedia/player/faq/drm.mspx#q11_1
  43. ^ "Supported media formats". Android Developers.
  44. ^ "Audio/Video - The Chromium Projects". www.chromium.org.
  45. ^ a b The ffmpeg project has reverse engineered some codecs of the RealAudio and Windows Media Audio (DivX Audio v1 and DivX Audio v2) formats. This enables their use on any POSIX compatible system.
  46. ^ Microsoft has outsourced their WMA support on Mac OS X to Telestream, Inc. who created and maintain Windows Media Components for QuickTime, replacing Windows Media Player for Mac OS.
  47. ^ a b Monogram DS filters Archived 2011-09-26 at the Wayback Machine, Retrieved 2009-10-22
  48. ^ About QuickTime 6.3 (Apple Knowledge Base), In QuickTime 6.3 the AMR codec is natively supported and the .AMR file format supported with the free-to-download 3GPP Component, Retrieved 2012-12-11
  49. ^ Media formats supported by QuickTime Player in Mac OS X 10.6.x (Apple Knowledge Base), "Media formats and codecs that QuickTime Player can play back in Mac OS X v10.6.x or later" AMR is listed both under "File formats" and "Codecs or components", Retrieved 2012-12-11
  50. ^ MPEG 2 AAC was limited to a 96 kHz sampling rate, however, with MPEG 4 AAC, a later version part of the MPEG 4 specification, the maximum sampling rate has been increased to 192 kHz.
  51. ^ "Algorithmic delay and synchronization in MPEG audio codecs - EE Times". EETimes. Retrieved 6 May 2017.
  52. ^ "Support Documents and Downloads". www.broadcom.com. Retrieved 6 May 2017.
  53. ^ a b Predrag Supurovic (September 1998). "MPEG Audio Frame Header". Retrieved 2009-07-11.
  54. ^ ISO/IEC JTC1/SC29/WG11 - Audio Subgroup. "MPEG Audio FAQ Version 9, MPEG-1 and MPEG-2 BC". Retrieved 2010-02-27.
  55. ^ "Opus Codec". Retrieved 2014-07-02.
  56. ^ "macosforge/alac". GitHub. Retrieved 6 May 2017.
  57. ^ "Dolby Atmos for Home Theaters". Dolby.com. Archived from the original on 20 May 2018. Retrieved 4 April 2018.
  58. ^ "DTS-HD and DTS-HD Master Audio: Enabling HD Audio Across an Evolving Media Delivery Landscape", DTS, Inc., October 2012
  59. ^ FLAC supports from 4 to 32 bits per sample. Currently the reference encoder and decoders only support up to 24 bits per sample. [1]
  60. ^ https://www.monkeysaudio.com/versionhistory.html
  61. ^ "Tau Projects". en.true-audio.com. Retrieved 6 May 2017.
  62. ^ Britanak, Vladimir; Rao, K. R. (2017). Cosine-/Sine-Modulated Filter Banks: General Properties, Fast Algorithms and Integer Approximations. Springer. pp. 31, 478. ISBN 9783319610801.

External linksEdit

  • Comparative test April, 2004
  • EBU subjective listening tests on low-bitrate audio codecs
  • Hydrogenaudio comparison of lossless formats
  • Tsabary, Eldad. "A Survey of Audio Coders for Electronic-Art Music." eContact! 9.4 — Perte auditive et sujets connexes / Hearing (Loss) and Related Issues (May 2007). Montréal: CEC.
  • Rodman, Jeffrey "VoIP to 20 kHz: Codec Choices for High Definition Voice Telephony" (July, 2008)

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