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Xiph.Org Foundation
Founders Christopher Montgomery
Type 501(c)(3)
Founded 1994
Headquarters Somerville, Massachusetts, United States
Staff Christopher Montgomery, Jack Moffitt, Ralph Giles (Theora), Jean-Marc Valin (speex, CELT)[1], Josh Coalson (FLAC), Michael Smith, Timothy Terriberry[2][3][4][5]
Area served Worldwide
Products Ogg, Vorbis, Theora, Speex, FLAC, CELT, Ogg Writ, Icecast, cdparanoia, etc.

Xiph.Org Foundation is a non-profit organization[6] that produces free multimedia formats and software tools. It focuses on the Ogg family of formats, the most successful of which has been Vorbis, an open and patent-free audio format and codec designed to compete with the patented MP3 and AAC. Current development work is focusing on Theora, an open and patent-free video format and codec designed to compete with the patented MPEG-4, RealVideo, and Windows Media Video.

In addition to its in-house development work, the Foundation has also brought several already-existing but complementary free software projects under its aegis, most of which have a separate, active group of developers. These include Speex, an audio codec designed for speech, and FLAC, a lossless audio codec.

In 2008 the Free Software Foundation listed the Xiph.Org projects as High Priority Free Software Projects.[7]



Chris Montgomery, creator of the Ogg container format, founded the Xiphophorus company and later the Xiph.Org Foundation.[8] The first work that became the Ogg media projects started in 1994.[9] The name "Xiph" abbreviates the original organizational name, "Xiphophorus", named after the common swordtail fish, Xiphophorus hellerii.[10] The name "Xiphophorus company" was used until 2002,[11][12][13] when it was renamed to Xiph.Org Foundation.[14]

In 1999 the Xiphophorus company defined itself on website as "a distributed group of Free and Open Source programmers working to protect the foundations of Internet multimedia from domination by self-serving corporate interests".[15] In 2002 the Xiph.Org Foundation defined itself on website as "a non-profit corporation dedicated to protecting the foundations of Internet multimedia from control by private interests".[14]

In March 2003, the Xiph.Org Foundation has been recognized by the IRS as a 501(c)(3) Non-Profit Organization.[16]

Xiph.Org Foundation projects

  • Ogg - a multimedia container format, a reference implementation, and the native file and stream format for the multimedia codecs
    • Vorbis - a lossy audio compression format and software
    • Theora - a lossy video compression format and software
    • FLAC - a lossless audio compression format and software
    • Speex - a lossy speech compression format and software
    • CELT - an ultra-low delay lossy audio compression format and software
    • Tremor - an integer-only implementation of the Vorbis audio decoder for embedded devices (software)
    • OggPCM - an encapsulation of PCM audio data inside the Ogg container format
    • OggUVS - an uncompressed video codec for Ogg (a work in progress and not a final proposal)
    • Skeleton[17] - a structuring information for multitrack Ogg files (a logical bitstream within an Ogg stream)
    • RTP-containers for Vorbis, Theora, Speex
    • CMML - an XML-based markup language for time-continuous data (a timed text codec)
    • Ogg Writ - a text phrase codec (no longer maintained)
    • Ogg Squish - a lossless audio compression format and software (discontinued)
    • Tarkin - an experimental lossy video compression; no stable release (discontinued)[18]
  • libao, an audio-output library that operates on different platforms[19]
  • Xiph QuickTime Components - an implementation of the Ogg container along with the Speex, Theora, FLAC and Vorbis codecs for QuickTime (software)
  • Annodex - an encapsulation format, which interleaves time-continuous data with CMML markup in a streamable manner
  • cdparanoia - a compact disc ripper (software)
  • XSPF - a playlist format for digital media
  • Icecast - an open source multi-platform streaming server (software)
  • Ices - a source client for broadcasting in Ogg Vorbis or MP3 format to an icecast2 server (software)
  • IceShare - an unfinished peercasting system for Ogg multimedia (no longer maintained)


  1. ^ - personal webspace of the xiphs - Jean-Marc Valin, Retrieved 2009-09-11
  2. ^ Timothy B. Terriberry (2009). " - Timothy B. Terriberry, Ph.D.". Xiph.Org. Retrieved 2009-09-11.  
  3. ^ "Summer of Code Mentoring". Xiph.Org. 2009. Retrieved 2009-09-11.  
  4. ^ "Minutes of the Monthly Meeting for May 2003". 2003-05-10. Retrieved 2009-09-11.  
  5. ^ "Minutes of the Monthly Meeting for September 2003". Xiph.Org. 2003-09-16. Retrieved 2009-09-11.  
  6. ^ "Fundraising". Retrieved 2008-08-25.  
  7. ^ "High Priority Free Software Projects". Free Software Foundation. Retrieved 2008-08-25.  
  8. ^ " Contact information". Retrieved 2008-08-25.  
  9. ^ "A Challenger to MP3?". Tristan Louis. 2001-01-16. Retrieved 2008-09-02.  
  10. ^ "naming". Retrieved 2008-08-25.  
  11. ^ Brian Zisk (2000-04-19). "vorbis - Dvorak Interviews Monty". Retrieved 2008-09-04.  
  12. ^ Advogado (2000-04-04). "Interview: Christopher Montgomery of Xiphophorus". Advogado. Retrieved 2009-09-02.  
  13. ^ Xiphophorus company (2001-12-12). "Xiphophorus home". Retrieved 2009-09-02.  
  14. ^ a b Foundation (2002-11-27). " home". Retrieved 2009-09-02.  
  15. ^ Xiphophorus company (1999-11-28). "Xiphophorus home". Retrieved 2009-09-02.  
  16. ^ Xiph.Org (2003-03-24) Speex reaches 1.0; Xiph.Org now a 501(c)(3) Non-Profit Organization, Retrieved 2009-09-01
  17. ^
  18. ^ Michael Smith (2005-08-29) Tarkin, vorbis-dev mailinglist, Retrieved 2009-09-06
  19. ^ "libao: a cross platform audio library". Xiph.Org. Retrieved 2009-06-29. "Libao is a cross-platform audio library that allows programs to output audio using a simple API on a wide variety of platforms."  

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