End-to-end Speech Recognition Using Lattice-free MMI

@inproceedings{Hadian2018EndtoendSR,
  title={End-to-end Speech Recognition Using Lattice-free MMI},
  author={Hossein Hadian and H. Sameti and Daniel Povey and S. Khudanpur},
  booktitle={INTERSPEECH},
  year={2018}
}
We present our work on end-to-end training of acoustic models using the lattice-free maximum mutual information (LF-MMI) objective function in the context of hidden Markov models. [...] Key Result We also compare with other end-to-end methods such as CTC in character-based and lexicon-free settings and show 5 to 25 percent relative reduction in word error rates on different large vocabulary tasks while using significantly smaller models.Expand
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