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OpenFst tools

fst_extract_subnet

  • Extracts sub-FST from FST given by start and end state

fst_traverser

  • General FST traverser

Query-by-Example Spoken Term Detection:

Assuming we have HTK phone lattices for both queries and utterances, we have to follow these steps:

  1. Convert lattice to confusion network (sausage)
    scripts/lattice2sausage.sh
  1. Convert sausages to FSTs
    scripts/sausage2fst_*.sh
  1. Compose query and utterance FSTs
    scripts/compose_fst_cn.sh
  1. Convert composition features to recs
    scripts/compose_fst_cn_features_to_recs.sh
  1. Merge recs to a single MLF file
    scripts/compose_fst_rec2mlf.sh

Additional scripts are in the ./scripts/ subdir. Some of them is more convenient to copy to your $PATH dir (e.q. $HOME/bin)