OpenFst Library: Contributed and related projects

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Projects/Contributions using the OpenFst Library

  • Categorial Semiring: Categorial semiring as described in Sproat et al. 2014
  • Specializer: Python library for attaching special matchers
  • Bash completions for OpenFst: Bash completions file to suggest flags and values
  • OpenFst for Windows: OpenFst library and command line tools for Windows compiled with Visual Studio.
  • OpenGrm Libraries: OpenGrm is a collection of open-source libraries for constructing, combining, applying and searching formal grammars including the NGram Library, the Thrax and Pynini Grammar Compilers, and SFST, a stochastic FST library.
  • UCAM-SMT: The Cambridge Statistical Machine Translation system
  • Kleene Language: Kleene is based on OpenFst but includes some features borrowed from the Xerox Finite State Toolkit; it supports Perl-like regular expressions, right-linear phrase-structure grammars, functions and rule-like notations

Speech recognition & synthesis

  • G2P conversion with OpenFst: Grapheme-to-phoneme conversion toolkit utilizing the OpenFst library
  • Kaldi: Kaldi is a toolkit for speech recognition written in C++ and licensed under the Apache License v2.0. Kaldi is intended for use by speech recognition researchers
  • OpenDcd: A lightweight and portable WFST based speech decoding toolkit written in C++, providing a set of tools for decoding, cascade construction and hypothesis post-processing

Related/Historical projects

  • FSM Library: a general-purpose software library for building, combining, optimizing, and searching weighted automata and transducers CLOSED
  • Lextools: a collection of tools for compiling high-level linguistic descriptions into weighted transducers CLOSED
  • DCD Library: software collection for decoding and related functions, designed for speech recognition and other applications. CLOSED

Topic attachments
I Attachment History Action Size Date Who Comment
Unknown file formatgz baumwelch-0.3.0.tar.gz r1 manage 383.3 K 2019-10-16 - 15:35 KyleGorman  
Unknown file formatgz categorial-1.3.3.tar.gz r2 r1 manage 323.9 K 2014-08-26 - 16:24 RichardSproat Categorial semiring as described in Sproat et al. 2014 (
Compressed Zip archivezip r1 manage 692.9 K 2009-03-07 - 07:39 UnknownUser OpenFst code and Visual Studio solution for Windows
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Topic revision: r80 - 2021-03-05 - KyleGorman
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