Voice recognition
Free or open source
- Sphinx
- Julius, so far only with a Japanese language model and acoustic model. Used by Vestec for their Asterisk solution. See also here on asterisk forge.
- ISIP
- HTK - has distribution restrictions
- IBM ViaVoice,see also http://volker.dnsalias.net/linux/speechrec.html, also available as Google cache or Wayback Machine. ViaVoice has software for both desktop and telephony applications.
- http://perlbox.org/: Open source voice recognition for desktop steering
- http://freespeech.sourceforge.net/FreeSpeech/html/
- ZOIP: Text adventure ZORK for Asterisk (with text-to-speech and voice recognition)
- http://zaf.github.com/asterisk-speech-recog/ Speech recognition script for Asterisk that uses Google speech API.
Commercial
- LumenVox - amongst others available for Asterisk 1.4 (a LumenVox patch for 1.2 is also available)
- Nuance (formerly ScanSoft): Professional solution, commercial Text-to Speech (((Text-to Speech (((Text-to Speech (((Text-to Speech (((Text-to Speech (((Text-to Speech (TTS)))))) and ASR software often used for telephony applications
- Loquendo: Professional solution
- Acculab - Built-in to commercial DSP-based telephony cards
- Lernout & Hauspie - Commercial software often used for telephony and embedded applications
- Microsoft Speech Server - Does ASR and Text-to Speech (((Text-to Speech (((Text-to Speech (((Text-to Speech (((Text-to Speech (((Text-to Speech (TTS)))))) with support for telephony applications
- Other vendors: IBM, Fonix Speech, Sensory Inc., Verbio, Voice Signal Technologies, Vorero, Utopy
- Asterisk cmd ASR - professional, multilanguage voice recognition for Asterisk based on ASP model
- VoiceXML platforms typically offer Text-to Speech (((Text-to Speech (((Text-to Speech (((Text-to Speech (((Text-to Speech (((Text-to Speech (TTS)))))) and ASR as part of their ASP, software, or hardware appliance solutions