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@conference{Silen2010_interspeech, author = "Hanna Sil{\'e}n and Elina Helander and Jani Nurminen and Konsta Koppinen and Moncef Gabbouj", abstract = "In hidden Markov model-based unit selection synthesis, the beneļ¬ts of both unit selection and statistical parametric speech synthesis are combined. However, conventional Viterbi algorithm is forced to do a selection also when no suitable units are available. This can drift the search and decrease the overall quality. Consequently, we propose to use robust Viterbi algorithm that can simultaneously detect bad units and select the best sequence. The unsuitable units are replaced using hidden Markov model-based synthesis. Evaluations indicate that the use of robust Viterbi algorithm combined with unit replacement increases the quality compared to the traditional algorithm.", booktitle = "Interspeech 2010", keywords = "speech synthesis;robust Viterbi algorithm;unit selection;hidden Markov models", note = "Demo available at: https://www.cs.tut.fi/sgn/arg/silen/is2010/robust_viterbi.html", title = "{U}sing {R}obust {V}iterbi {A}lgorithm and {HMM}-{M}odeling in {U}nit {S}election {TTS} to {R}eplace {U}nits of {P}oor {Q}uality", url = "https://www.cs.tut.fi/~moncef/publications/using-robust-viterbi-ISCA-2010.pdf", year = "2010", }