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- W2156831250 abstract "A hidden Markov modeling technique that uses a statistical modeling of vector quantization (VQ)-code transitions is proposed. A bigram-constrained HMM is obtained by combining a VQ-code bigram and the conventional speaker-independent HMM. The proposed model reduces overlapping of the feature distributions between different phonemes by restricting the local VQ-code transitions. The output probabilities in the model are conditioned by the VQ-code of the previous frame. Therefore, the output probability distribution of the model changes depending on the previous frame even in the same state. A speaker-dependent bigram-constrained HMM is obtained using a VQ-code bigram calculated from utterances of an input speaker. A speaker-independent bigram-constrained HMM is obtained using a VQ-code bigram calculated from utterances of many speakers. The model was evaluated by an 18-Japanese-consonant recognition experiment using 5240 words. The speaker-independent bigram-constrained HMM achieved an average recognition accuracy of 76.3% which is 5.5% higher than the conventional speaker-independent HMM.< <ETX xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>></ETX>" @default.
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- W2156831250 date "1992-01-01" @default.
- W2156831250 modified "2023-10-17" @default.
- W2156831250 title "Phonemic HMM constrained by statistical VQ-code transition" @default.
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- W2156831250 doi "https://doi.org/10.1109/icassp.1992.225848" @default.
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