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# LatticeWordSegmentation #
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Software to apply unsupervised word segmentation on lattices or text sequences
using a nested hierarchical Pitman Yor language model


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# Contact #
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In case of questions, suggestions, problems etc. please send an email or check the disussion group.

Oliver Walter:
walter@nt.uni-paderborn.de

Discussion group:
email: latticewordsegmentation@googlegroups.com
google groups: https://groups.google.com/d/forum/latticewordsegmentation


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# References #
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Iterative Bayesian Word Segmentation for Unspuervised Vocabulary Discovery from Phoneme Lattices
Jahn Heymann, Oliver Walter, Reinhold Haeb-Umbach, Bhiksha Raj
In 39th International Conference on Acoustics, Speech and Signal Processing (ICASSP 2014)

Unsupervised Word Segmentation from Noisy Input
Jahn Heymann, Oliver Walter, Reinhold Haeb-Umbach, Bhiksha Raj
In Automatic Speech Recognition and Understanding Workshop (ASRU 2013)

Graham Neubig, Masato Mimura, Shinsuke Mori, Tatsuya Kawahara
"Learning a Language Model from Continuous Speech"
In proceedings for InterSpeech 2010


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# Manual Instalation #
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Import project into kdevelop (or other IDE)
Set cmake build path to $GITROOT/build/ (next to src/ and test/ directories)
Install openFST from http://www.openfst.org/twiki/bin/view/FST/FstDownload
Required boost packages: boost_system, boost_filesystem

Note: For more performace use release (-O3 -DNDEBUG) build!

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# Automatic instalation #
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run install.sh, this will also install boost and openfst in the tools directory

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# Examples #
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For demonstations see the scripts in the test/ folder