Llaisdy

Here’s a list of FOSS and FOSS-ish ASR toolkits: url, license and rough activity dates, and maybe the odd comment.

Apart from Sphinx4, which is written in The Java Programming Language, all of these are written in C/C++.

Kaldi looks the most interesting and mature. I’d also like to have more of a look at Bavieca, GMTK and TLK.

Have I missed any?

• Bavieca
  Apache 2.0
  2012-2013

• GMTK
  Open Software License v. 3.0
  2011?

• HTK
  Weird license:
  • http://htk.eng.cam.ac.uk/docs/license.shtml
  • owned by Microsoft
  • any use, no redistribution
  • i.e., can use to train but cannot distribute recogniser: must distribute separate recogniser (eg Julius)

  Latest version is 3.4.1, 2009

• iAtros
  GPL
  2008?

  unclear documentation
  unclear if HTK required
  designed for recognition of speech and handwriting

• Kaldi
  Apache 2.0
  Current (last sf update 2014-08-11)

• RASR
  Non-commercial use only
  2007-11?

• SCARF
  Non-Commercial Use Only
  2010-11?

• SPRAAK
  Free for non-commercial use only; commercial license request & pay
  2009-10

• Sphinx
  BSD
  Sphinx4 (java) is current
  Sphinx3 (C/C++) is unmaintained

• TLK
  Apache 2.0
  2013 & current