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You are here: Home Technology Transfer News As part of a general policy of open-sourcing our work at Idiap Research Institute, we are pleased to make available ISS: Idiap Speech Scripts.

As part of a general policy of open-sourcing our work at Idiap Research Institute, we are pleased to make available ISS: Idiap Speech Scripts.

ISS is a collection of scripts for maintenance of speech databases and dictionaries, and for training and testing of models for ASR. The scripts in turn are reliant on many other packages including HTK/HTS, Juicer and the ICSI speech tools.

Features include:

  • GMM (HTK/HTS) and MLP (QuickNet) training in the same framework
  • Adaptation and speaker adaptive training
  • Tandem
  • Testing with hvite, hdecode and juicer
  • Plays well with SGE (no knowledge of SGE required)
  • Runs seamlessly either on the grid or interactively
  • WFST composition with AT&T or OpenFST toolkits
  • Large and growing collection of phone sets
  • Automatic decision tree question sets for many languages
  • Automatic decision tree threshold tuning using MDL or state count
  • Features from HTK, SPTK or tracter (others trivially)
  • HTK extended filenames, or not, your choice
  • Database maintenance tools
  • Out of vocabulary pronunciations via phonetisaurus


All the packages are on GitHub:

Core scripts:
https://github.com/idiap/iss

Dictionary maintenance
https://github.com/idiap/iss-dicts

Exemplars for the Wall Street Journal and Aurora-4 tasks
https://github.com/idiap/iss-wsj
https://github.com/idiap/iss-aurora4

Some other related speech processing packages are also available:

Juicer, a WFST based decoder for ASR
https://github.com/idiap/juicer

Tracter, a data-flow framework
https://github.com/idiap/tracter

SSP, a signal processing package written in python

https://github.com/idiap/ssp

Most releases are under a BSD licence, which is quite permissive.

Aug 13, 2013
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