Substate tying with combined parameter training and reduction in tied-mixture HMM design

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State-dependent mixture tying with variable codebook size for accented speech recognition

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Efficient mixture Gaussian synthesis for decision tree based state tying

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Genones: optimizing the degree of mixture tying in a large vocabulary hidden Markov model based speech recognizer

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Genones: generalized mixture tying in continuous hidden Markov model-based speech recognizers

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Toward robust learning of the Gaussian mixture state emission densities for hidden Markov models

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Sub-state tying in tied mixture hidden markov models (2000).

Hybrid training method for tied mixture density hidden Markov models using learning vector quantization and Viterbi estimation

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Hybrid training method for tied mixture density hidden markov models using learning vector quantization and viterbi estimation (0).