List of Codecs - Audio Codecs - Lossy Data Compression - Voice

Voice

(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)
      • FFmpeg (decoder only)
    • Selectable Mode Vocoder (SMV)
    • Variable Multi Rate – WideBand (VMR-WB)
  • CELT
    • libcelt
  • Code Excited Linear Prediction (CELP)
  • Continuously variable slope delta modulation (CVSD)
  • Dialogic ADPCM (VOX)
  • Digital Speech Standard (DSS)
  • FS-1015 (LPC-10)
    • HawkVoice (libHVDI)
  • FS-1016 (CELP)
    • HawkVoice (libHVDI)
  • ITU standards:
    • G.711 (a-law and μ-law companding), also known as PCM of voice frequencies
      • FFmpeg (libavcodec)
    • G.711.0 (G.711 LLC)
    • G.711.1
    • G.718
    • G.719
    • G.721 (superseded by G.726)
    • G.722
      • FFmpeg
    • G.722.1
    • G.722.2 (AMR-WB)
      • 3GPP TS 26.173 - AMR-WB speech Codec (C-source code) - reference implementation
      • opencore-amr (decoder)
      • FFmpeg (decoder only)
    • G.723 (24 and 40 kbit/s DPCM, extension to G.721, superseded by G.726)
    • G.723.1 (MPC-MLQ or ACELP)
      • FFmpeg
    • G.726 (ADPCM)
      • FFmpeg (libavcodec)
    • G.728 (LD-CELP)
    • G.729 (CS-ACELP)
      • FFmpeg (decoder only)
    • G.729a
    • G.729d
      • FFmpeg (decoder only)
    • G.729.1
  • GSM compression formats and codecs:
    • Full Rate (GSM 06.10)
      • libgsm
      • FFmpeg (decoder only)
    • 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
        • 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 - 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 Android VisualOn (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
  • Harmonic Vector Excitation Coding (HVXC)
  • Internet Low Bit Rate Codec (iLBC)
    • WebRTC
  • Improved Multi-Band Excitation (IMBE)
  • internet Speech Audio Codec (iSAC)
    • WebRTC
  • IP-MR used by SPIRIT DSP and many others
  • Mixed Excitation Linear Prediction (MELP)
  • Nellymoser Asao Codec
    • FFmpeg (libavcodec)
  • Opus
  • PT716, PT716plus
  • PT724
  • RALCWI (Robust Advanced Low Complexity Waveform Interpolation)
  • Relaxed Code Excited Linear Prediction (RCELP)
  • RTAudio - used by Microsoft Live Communication Server
  • SILK - used by Skype
  • Speex, patent free
    • libspeex
  • SVOPC - used by Skype
  • Triple Rate CODER (TRC) - used in some pocket recorders.
  • Vector Sum Excited Linear Prediction (VSELP)
  • OpenLPC
    • HawkVoice (libHVDI)
  • Voxware VR12 - used by Microsoft DirectPlay
  • Voxware SC03 - used by Microsoft DirectPlay
  • Voxware SC06 - used by Microsoft DirectPlay
  • Truespeech
    • FFmpeg (decoder only)

Read more about this topic:  List Of Codecs, Audio Codecs, Lossy Data Compression

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