THESIS Rasipuram_THESIS_2014/IDIAP Grapheme-based Automatic Speech Recognition using Probabilistic Lexical Modeling Rasipuram, Ramya Automatic Speech Recognition grapheme-based automatic speech recognition grapheme-to-phoneme conversion Kullback-Leibler divergence based hidden Markov model Lexicon phoneme subword units probabilistic lexical modeling under-resourced speech recognition EXTERNAL http://publications.idiap.ch/attachments/papers/2014/Rasipuram_THESIS_2014.pdf PUBLIC 2014 École polytechnique fédérale de Lausanne doi:10.5075/epfl-thesis-6280 doi