List of codecs: Information from Answers.com

The following is a list of compression formats and related codecs.

1 Audio codecs
2 Text codecs
3 Video codecs
- 3.1 Lossless compression
- 3.2 Lossy compression
4 Other
5 See also
6 References
7 External links

Audio codecs

Main article: Audio codec

Non-compression formats

Linear Pulse Code Modulation (LPCM, generally only described as PCM) is most used format for uncompressed audio and it is also standard for Compact Disc Digital Audio; note that LPCM is in a computer usually stored in AIFF, WAV, AU container format or as RAW audio format
- Audio Interchange File Format (AIFF, audio container format)
- WAV – Microsoft "WAVE", audio container format (format supports compression, but it is rarely used)
Pulse-density modulation (PDM)
- Direct Stream Digital (DSD) is standard for Super Audio CD
Pulse-amplitude modulation (PAM)

Lossless data compression

Main article: Lossless data compression

Apple Lossless Audio Codec (ALAC)
- FFmpeg
- QuickTime
Direct Stream Transfer (DST)
- MPEG-4 DST reference software (ISO/IEC 14496-5:2001/Amd.10:2007)
Dolby TrueHD – Optional lossless surround sound format used by HD DVD and Blu-ray, it uses MLP but adds higher sample rates, bit rates, and more channels
DTS-HD Master Audio – Optional lossless surround sound format used by HD DVD and Blu-ray, it was previously known as DTS++ and DTS-HD
Free Lossless Audio Codec (FLAC)
- FFmpeg
- libFLAC
Lossless Audio (LA)
Lossless Predictive Audio Compression (LPAC)
Lossless Transform Audio Compression (LTAC)
MPEG-4 Audio Lossless Coding (MPEG-4 ALS)
- MPEG-4 ALS reference software (ISO/IEC 14496-5:2001/Amd 10:2007/Cor 3:2009)
MPEG-4 Scalable Lossless Coding (MPEG-4 SLS, also used in audio profile HD-AAC)
- MPEG-4 SLS reference software (ISO/IEC 14496-5:2001/Amd 10:2007)
Meridian Lossless Packing (MLP), also known as Packed PCM (PPCM), it is the standard lossless compression method for DVD-Audio content
Monkey's Audio (APE)
OptimFROG (OFR)
RealAudio Lossless
RK Audio (RKAU)
Shorten (SHN)
- FFmpeg (decoder only)
True Audio (TTA)
WavPack (WV)
- FFmpeg (decoder only)
Windows Media Audio 9 Lossless

Lossy data compression

Main article: Lossy data compression

General

Adaptive Differential (or Delta) pulse-code modulation (ADPCM, see Pulse-code modulation)
ADX
Adaptive Rate-Distortion Optimised sound codeR (ARDOR)
Adaptive Transform Acoustic Coding (ATRAC, used in MiniDisc devices)
- FFmpeg (decoder only)
apt-X
Dolby Digital (A/52, AC3)
- FFmpeg
- liba52
DTS Coherent Acoustics (DTS, Digital Theatre System Coherent Acoustics)
Impala FORscene audio codec
ITU standards:
- G.719
- G.722
- G.722.1 and G.722.1 Annex C
  - libg722_1
  - libsiren (part of libmsn and msn-pecan)
- G.722.2
  - 3GPP TS 26.173 - AMR-WB speech Codec (C-source code) - reference implementation^[1]
  - opencore-amr (decoder)
MPEG-1 Audio and MPEG-2 Audio
- layer I (MP1) (MPEG-1, MPEG-2 and non-ISO MPEG-2.5)
  - FFmpeg (decoder only)
- layer II (MP2) (MPEG-1, MPEG-2 and non-ISO MPEG-2.5)
  - FFmpeg
  - tooLame
  - twoLame
- layer III (MP3) (MPEG-1, MPEG-2 and non-ISO MPEG-2.5)
  - FFmpeg (decoder only without external library)
  - LAME
- Advanced Audio Coding (AAC) (MPEG-2 Part 7)
  - FAAC, FAAD
  - FFmpeg
  - iTunes
  - Nero AAC Codec
MPEG-4 Audio
- Advanced Audio Coding (AAC), (MPEG-4 Part 3 subpart 4), HE-AAC
  - FAAC, FAAD2
  - FFmpeg (decoder only without external library)
  - iTunes
  - Nero AAC Codec
  - MPEG-4 AAC reference software (ISO/IEC 14496-5:2001)
- Harmonic and Individual Lines and Noise (HILN, MPEG-4 Parametric Audio Coding)
  - MPEG-4 reference software (ISO/IEC 14496-5:2001)
- TwinVQ
  - MPEG-4 reference software (ISO/IEC 14496-5:2001)
- BSAC (Bit-Sliced Arithmetic Coding)
  - MPEG-4 reference software (ISO/IEC 14496-5:2001)
Musepack
Perceptual Audio Coding
QDesign
Siren 7
- libg722_1
- libsiren (part of libmsn and msn-pecan)
Siren 14
- libg722_1
Siren 22
TwinVQ
- FFmpeg (decoder only)
- NTT TwinVQ Encoder, NTT TwinVQ Player
Vorbis
- aoTuV
- FFmpeg (decoder only without external library)
- libvorbis
- Tremor
Windows Media Audio (WMA)
- Windows Media Encoder

Voice

Main article: Speech encoding

(low bit rate, optimized for speech)

Advanced Multi-Band Excitation (AMBE)
Algebraic Code Excited Linear Prediction (ACELP)
CDMA compression formats and codecs
- Enhanced Variable Rate Codec (EVRC)
- Enhanced Variable Rate Codec B (EVRC-B)
- QCELP (Qualcomm Code Excited Linear Prediction)
- Selectable Mode Vocoder (SMV)
- Variable Multi Rate – WideBand (VMR-WB)
CELT
Code Excited Linear Prediction (CELP)
Continuously variable slope delta modulation (CVSD)
Dialogic ADPCM (VOX)
Digital Speech Standard (DSS)
FS-1015 (LPC-10)
FS-1016 (CELP)
ITU standards:
- G.711 (a-law and μ-law companding), also known as PCM of voice frequencies
  - FFmpeg (libavcodec)
- G.711.1
- G.718
- G.719
- G.721 (superseded by G.726)
- G.722
- G.722.1
- G.722.2 (AMR-WB)
  - 3GPP TS 26.173 - AMR-WB speech Codec (C-source code) - reference implementation^[1]
  - opencore-amr (decoder)
- G.723 (24 and 40 kbit/s DPCM, extension to G.721, superseded by G.726)
- G.723.1 (MPC-MLQ or ACELP)
- G.726 (ADPCM)
  - FFmpeg (libavcodec)
- G.728 (LD-CELP)
- G.729 (CS-ACELP)
  - G.729a
  - G.729.1
GSM compression formats and codecs:
- Full Rate (GSM 06.10)
  - libgsm
- Half Rate (GSM 06.20)
- Enhanced Full Rate (GSM 06.60)
- Adaptive Multi-Rate (AMR)
  - AMR-NB
    - 3GPP TS 26.073 - AMR speech Codec (C-source code) - reference implementation^[2]
    - opencore-amr
  - AMR-WB
    - 3GPP TS 26.173 - AMR-WB speech Codec (C-source code) - reference implementation^[1]
    - opencore-amr (decoder)
  - AMR-WB+
    - 3GPP TS 26.273 - AMR-WB+ speech Codec (C-source code) - reference implementation^[3]
Harmonic Vector Excitation Coding (HVXC)
Internet Low Bit Rate Codec (iLBC)
Improved Multi-Band Excitation (IMBE)
internet Speech Audio Codec (iSAC)
Mixed Excitation Linear Prediction (MELP)
Nellymoser Asao Codec
- FFmpeg (libavcodec) (decoder only)
PT716, PT716plus
PT724
Relaxed Code Excited Linear Prediction (RCELP)
RTAudio - used by Microsoft Live Communication Server
SILK - used by Skype
Speex, patent free
SVOPC - used by Skype
Triple Rate CODER (TRC) - used in some pocket recorders.
Vector Sum Excited Linear Prediction (VSELP)

Text codecs

BiM
Continuous Media Markup Language (CMML)
MPEG-4 Part 17 (e.g. 3GPP Timed Text)
Ogg Kate
Ogg Writ

Video codecs

Main article: Video codec

Lossless compression

Alpary
ArithYuv
AVIzlib
CamStudio GZIP
CorePNG
FastCodec
FFV1
Huffyuv
Lagarith
LCL
LOCO
LZO
MSU Lossless Video Codec
PICVideo
SheerVideo
Snow
TSCC TechSmith Screen Capture Codec
x264
ZMBV (Zip Motion Block Video) Codec
JPEG 2000 - using the 5/3 filter for Lossless coding - intra-frame video coding
YULS

Lossy compression

Audio Video Standard (AVS)
- OpenAVS
Blackbird FORscene video codec
Cineform
Cinepak
Dirac
- Schrödinger
- dirac-research
DV
Firebird [1] Original FORscene video codec
H.261
- FFmpeg H.261 (libavcodec)
H.263
- FFmpeg H.263 (libavcodec)
H.264, also known as MPEG-4 AVC (Advanced Video Coding) or MPEG-4 Part 10, approved for Blu-ray
- CoreAVC
- MainConcept
- Nero Digital
- QuickTime H.264
- Sorenson AVC Pro codec, Sorenson's new implementation
- Vanguard Software Solutions
- x264
Indeo 3/4/5
MJPEG
- FFmpeg
- Morgan Multimedia M-JPEG
- Pegasus PICVideo M-JPEG
JPEG 2000 intra frame video codec
MPEG-1 Video (MPEG-1 Part 2)
- Cinema Craft Encoder
- FFmpeg
- Ligos LSX MPEG-1
- MainConcept MPEG-1
- TMPGEnc
MPEG-2 Video (MPEG-2 Part 2), also known as H.262
- Canopus ProCoder
- Cinema Craft Encoder
- Elecard MPEG-2 Video Decoder
- FFmpeg
- InterVideo Video Decoder
- Ligos LSX MPEG-2
- MainConcept MPEG-2
- TMPGEnc
MPEG-4 ASP (Advanced Simple Profile) or MPEG-4 Part 2
- 3ivx
- DivX
- FFmpeg MPEG-4
- HDX4
- Nero Digital
- Xvid
OMS Video
On2 Technologies TrueMotion VP3, VP4, VP5, VP6, VP7, VP8, under the name The Duck Corporation: TrueMotion S, TrueMotion 2
Pixlet
Apple ProRes 422
RealVideo
Snow Wavelet Codec
Sorenson Video, Sorenson Spark
Tarkin
Theora
- FFmpeg
- libtheora
TruDef high definition fractal video codec
VC-1 (SMPTE standard, subset of Windows Media Video)
VC-3 SMPTE standard
- Avid DNxHD
- FFmpeg
Windows Media Video (WMV)
- WAX (Part of the Windows Media Series)

Other

References

^ ^a ^b ^c 3GPP (2008-12-11) 3GPP TS 26.173 - AMR-WB speech Codec; version 8.0.0 Release 8, Retrieved 2009-09-09
^ 3GPP (2008-12-11) 3GPP TS 26.073 - AMR speech Codec; version 8.0.0 Release 8, Retrieved 2009-09-08
^ 3GPP (2008-12-18) 3GPP TS 26.273 - AMR-WB+ speech Codec; version 8.0.0 Release 8, Retrieved 2009-09-09

External links

Subjective codec comparison
Audio formats comparison, a look at six lossless formats and five lossy formats.
http://www.fourcc.org/codecs.php, list of codec four digit codes (like DIV3, XVID, ...)
Interactive blind listening tests of audio codecs over the internet
http://mediainfo.sourceforge.net/en/Support/Formats ,List of different audio codecs and meta-data by them
Everything you always wanted to know about JPEG 2000 - published by intoPIX in 2008 , for Lossy or Lossless JPEG 2000 video coding (PDF)

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List of codecs

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