发明名称 |
VITERBI DECODER AND SPEECH RECOGNITION METHOD USING SAME |
摘要 |
A Viterbi decoder includes: an observation vector sequence generator for generating an observation vector sequence by converting an input speech to a sequence of observation vectors; a local optimal state calculator for obtaining a partial state sequence having a maximum similarity up to a current observation vector as an optimal state; an observation probability calculator for obtaining, as a current observation probability, a probability for observing the current observation vector in the optimal state; a buffer for storing therein a specific number of previous observation probabilities; a non-linear filter for calculating a filtered probability by using the previous observation probabilities stored in the buffer and the current observation probability; and a maximum likelihood calculator for calculating a partial maximum likelihood by using the filtered probability. The filtered probability may be a maximum value, a mean value or a median value of the previous observation probabilities and the current observation probability.
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申请公布号 |
US2010161329(A1) |
申请公布日期 |
2010.06.24 |
申请号 |
US20090506719 |
申请日期 |
2009.07.21 |
申请人 |
ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE |
发明人 |
CHUNG HOON;PARK JEON GUE;LEE YUNKEUN;JUNG HO-YOUNG;JEON HYUNG-BAE;KANG JEORN JA;LEE SUNG JOO;CHUNG EUISOK;WANG JI HYUN;KANG BYUNG OK;PARK KI-YOUNG;KIM JONG JIN |
分类号 |
G10L15/00 |
主分类号 |
G10L15/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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