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Industry Telecommunications
Founded 2001
Founder Edward Miller
Headquarters San Diego, California, United States
Key people
Edward Miller, Founder and Chief Executive Officer
Products speech recognition

LumenVox is a privately held speech recognition software company, based in San Diego, California. LumenVox has been described[who?] as one of the market leaders in the speech recognition software industry[1] and is the second largest provider of speech recognition software according to industry analysts.[2]


LumenVox was founded in 2001 as subsidiary of Progressive Computing. According to LumenVox CEO Edward Miller, when Progressive had initially looked to add speech recognition to its own phone system, it found the existing offerings too expensive and recognized a niche in the market for a more affordable speech recognition product. This led to the development of LumenVox with an aim to bring speech recognition to small-to-midsized businesses.[3]

LumenVox is one of the major providers of automatic speech recognition for telephone systems, and as of 2006, became the second largest provider of speech recognition software.[2]


The primary LumenVox product is the LumenVox Speech Engine. It is a speaker-independent automatic speech recognizer that uses the Speech Recognition Grammar Specification for building and defining grammars.[4] It has been integrated with several of the major voice platforms, including Avaya Voice Portal/Interactive Response,[5] Aculab,[6] and BroadSoft's BroadWorks.[7] The Speech Engine was originally derived from CMU Sphinx,[8] but LumenVox has added considerable development effort to make it a commercial-ready product.[9]

LumenVox also offers a product called the Speech Tuner, which provides a graphical means of testing and troubleshooting speech recognition applications.[10]

Open Source Support[edit]

LumenVox was recognized as one of the top VoIP companies in 2008 for its work in providing its offerings to the open source community,[11] an effort by the company that began in 2006 when it partnered with Digium. At that time Digium, maintainer of the open source Asterisk PBX, integrated the LumenVox Speech Engine into Asterisk. This made LumenVox the first commercially available speech recognition engine for Asterisk.[12]

As one of the earlier commercial software integrations with Asterisk, the LumenVox integration has been described as one of the applications that helped to mainstream Asterisk.[9][13][14]

Because LumenVox is generally recognized within the speech recognition industry as one of the most affordable speech recognition products,[1] the LumenVox Speech Engine was able to meet a need for low-cost speech recognition within the open-source community.[15] In 2009, LumenVox also began offering access to the Speech Engine as a monthly subscription, bringing the cost of entry down even lower for open source users.[14][16][17]

LumenVox is also integrated with the open source UniMRCP project, which provides open source client and server libraries for the Media Resource Control Protocol.[18][19]


  1. ^ a b Klie, Leonard (22 August 2008). "The 2008 Market Leaders". Speech Technology Magazine. Retrieved 3 March 2010. 
  2. ^ a b Lessner, Ivy (2 October 2007). "Nuance Buys New York Software Firm". Retrieved 5 March 2010. 
  3. ^ "Interview with Ed Miller, CEO, LumenVox". Speech Technology Magazine. 1 October 2002. Retrieved 5 March 2010. 
  4. ^ "Speech Engine". LumenVox. Retrieved 5 March 2010. 
  5. ^ "Application Notes for LumenVox Speech Engine and LumenVox MRCPv1 Server with Avaya Interactive Response" (PDF). Avaya. 20 August 2009. Retrieved 5 March 2010. 
  6. ^ "IVR solutions using Aculab's media processing boards and software". Aculab. Retrieved 5 March 2010. 
  7. ^ "LumenVox Speech Engine Achieves Compliance with BroadSoft's BroadWorks Platform". Speech Technology Magazine. 22 May 2008. Retrieved 5 March 2010. 
  8. ^ "Applications, CMU Sphinx". Carnegie Mellon University. Archived from the original on 4 March 2010. Retrieved 5 March 2010. 
  9. ^ a b Tehrani, Rich (11 May 2007). "Asterisk Fuels Speech Technologies". Communications and Technology Blog - Retrieved 5 March 2010. 
  10. ^ "LumenVox Speech Tuner". LumenVox. Retrieved 5 March 2010. 
  11. ^ "LumenVox, Top VoIP Company 2008: FierceVoIP, Fierce 15". FierceVoIP. 4 November 2008. Retrieved 5 March 2010. 
  12. ^ "LumenVox and Digium Partner to Offer Speech-Enabled Asterisk". LumenVox. 13 March 2006. Retrieved 5 March 2010. 
  13. ^ Mohney, Doug (January–February 2008). "Advanced Applications of Asterisk". VON Magazine. Retrieved 5 March 2010. 
  14. ^ a b Bernier, Paula (November 2009). "Open Source Efforts No Longer an 'Obscure Sideshow of Geeks'". Internet Telephony Magazine. Retrieved 5 March 2010. 
  15. ^ Chak, Heison (December 2007). "Asterisk and LumenVox ASR" (PDF). ;login: The USENIX Magazine. Retrieved 5 March 2010. 
  16. ^ Barnard, Patrick (11 December 2009). "LumenVox's Speech Engine Now Available via the Software-as-a-Service Model". Retrieved 5 March 2010. 
  17. ^ Meisel, William (January 2010). "LumenVox and Digium offer $7.99/month speech recognition with Asterisk IVR" (PDF). Speech Strategy News. Retrieved 9 March 2010. 
  18. ^ Chaloyan, Arsen (27 December 2008). "Interop with LumenVox". UniMRCP Project. Retrieved 5 March 2010. 
  19. ^ Chaloyan, Arsen (26 March 2009). "LumenVox MRCPv2 Interop". UniMRCP Project. Retrieved 5 March 2010. 

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