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CHANGELOG.md

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Changelog

All notable changes to this project will be documented in this file. Note that the project (and python wheel) is built from a duorepo (2 separate repos used together), so changes from both will be reflected here, but the commits are spread between both.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning since v1.0.0.

[Unreleased] - Changes: KaldiAG KaldiFork

2.1.0 - 2021-04-04 - Changes: KaldiAG KaldiFork

Added

  • NativeWFST support for checking for impossible graphs (no successful path), which can then fail to compile.
  • Debugging info for NativeWFST.

Changed

  • lattice_beam default value reduced from 8.0 to 6.0, to hopefully avoid occasional errors.

Fixed

  • Reloading grammars with NativeWFST.

2.0.2 - 2021-03-30 - Changes: KaldiAG KaldiFork

Changed

  • Minor fix for OpenBLAS compilation for some architectures on linux/mac

2.0.0 - 2021-03-21 - Changes: KaldiAG KaldiFork

Added

  • Native FST support, via direct wrapping of OpenFST, rather than Python text-format implementation
    • Eliminates grammar (G) FST compilation step
  • Internalized many graph construction steps, via direct use of native Kaldi/OpenFST functions, rather than invoking separate CLI processes
    • Eliminates need for many temporary files (FSTs, .confs, etc) and pipes
  • Example usage for allowing mixing of free dictation with strict command phrases
  • Experimental support for "look ahead" graphs, as an alternative to full HCLG compilation
  • Experimental support for rescoring with CARPA LMs
  • Experimental support for rescoring with RNN LMs
  • Experimental support for "priming" RNNLM previous left context for each utterance

Changed

  • OpenBLAS is now the default linear algebra library (rather than Intel MKL) on Linux/MacOS
    • Because it is open source and provides good performance on all hardware (including AMD)
    • Windows is more difficult for this, and will be implemented soon in a later release
  • Default tmp_dir is now set to [model_dir]/cache.tmp
  • tmp_dir is now optional, and only needed if caching compiled FSTs (or for certain framework/option combinations)
  • File cache is now stored at [model_dir]/file_cache.json
  • Optimized adding many new words to the lexicon, in many different grammars, all in one loading session: only rebuild L_disambig.fst once at the end.
  • External interfaces: Compiler.__init__(), decoding setup, etc.
  • Internal interfaces: wrappers, etc.
  • Major refactoring of C++ components, with a new inheritance hierarchy and configuration mechanism, making it easier to use and test features with and without "activity"
  • Many build changes

Removed

  • Python 2.7 support: it may still work, but will not be a focus.
  • Google cloud speech-to-text removed, as an unneeded dependency. Alternative dictation is still supported as an option, via a callback to an external provider.

Deprecated

  • Separate CLI Kaldi/OpenFST executables
  • Indirect AGF graph compilation (framework==agf-indirect)
  • Non-native FSTs
  • parsing_framework==text

1.8.0 - 2020-09-05 - Changes: KaldiAG KaldiFork

Added

  • New speech models (should be better in general, and support new noise resistance)
  • Make failed AGF graph compilation save and output stderr upon failure automatically
  • Example of complete usage with a grammar and microphone audio
  • Various documentation

Changed

  • Top FST now accepts various noise phones (if present in speech model), making it more resistant to noise
  • Cleanup error handling in compiler, supporting Dragonfly backend automatically printing excerpt of the Rule that failed

Fixed

  • Mysterious windows newline bug in some environments

1.7.0 - 2020-08-01 - Changes: KaldiAG KaldiFork

Added

  • Add automatic saving of text FST & compiled FST files with log level 5

Changed

  • Miscellaneous naming

Fixed

  • Support compiling some complex grammars (Caster text manipulation), by simplifying during compilation (remove epsilons, and determinize)

1.6.2 - 2020-07-20 - Changes: KaldiAG KaldiFork

Fixed

  • Add missing rnnlm library file in MacOS build

1.6.1 - 2020-07-19 - Changes: KaldiAG KaldiFork

Changed

  • Windows wheels now only require the VS2017 (not VS2019) redistributables to be installed

1.6.0 - 2020-07-11 - Changes: KaldiAG KaldiFork

Added

  • Can now pass configuration dict to KaldiAgfNNet3Decoder, PlainDictationRecognizer (without HCLG.fst).
  • Continuous Integration builds run on GitHub Actions for Windows (x64), MacOS (x64), Linux (x64).

Changed

  • Refactor of passing configuration to initialization.
  • PlainDictationRecognizer.decode_utterance can take chunk_size parameter.
  • Smaller binaries: MacOS 11MB -> 7.6MB, Linux 21MB -> 18MB.

Fixed

  • Confidence measurement in the presence of multiple, redundant rules.
  • Python3 int division bug for cloud dictation.

Earlier versions

See GitHub releases notes.