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    • G.721 (superseded by G.726)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    • G.723 (24 and 40 kbit/s DPCM, extension to G.721, superseded by G.726)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

Famous quotes containing the word voice:

    “I’m tired of earning my own living, paying my own bills, raising my own child. I’m tired of the sound of my own voice crying out in the wilderness, raving on about equality and justice and a new social order.... Self-sufficiency is exhausting. Autonomy is lonely. It’s so hard to be a feminist if you are a woman.”
    —Jane O’Reilly, U.S. feminist and humorist. The Girl I Left Behind, ch. 7 (1980)

    “a voice still so hollow
    That it seems to call out to me from forty years ago,
    When you were all aglow,
    And not the thin ghost that I now frailly follow!”
    —Thomas Hardy (1840–1928)

    “A great man quotes bravely, and will not draw on his invention when his memory serves him with a word as good. What he quotes, he fills with his own voice and humour, and the whole cyclopedia of his table-talk is presently believed to be his own.”
    —Ralph Waldo Emerson (1803–1882)