发明名称 |
Generating confidence scores from word lattices |
摘要 |
Systems and methods for determining word confidence scores. Speech recognition systems generate a word lattice for speech input. Posterior probabilities of the words in the word lattice are determined using a forward-backward algorithm. Next, time slots are defined for the word lattice, and for all transitions that at least partially overlap a particular time slot, the posterior probabilities of transitions that have the same word label are combined for those transitions. The combined posterior probabilities are used as confidence scores. A local entropy can be computed on the competitor transitions of a particular time slot and also used as a confidence score.
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申请公布号 |
US7562010(B1) |
申请公布日期 |
2009.07.14 |
申请号 |
US20060426225 |
申请日期 |
2006.06.23 |
申请人 |
AT&T INTELLECTUAL PROPERTY II, L.P. |
发明人 |
GRETTER ROBERTO;RICCARDI GIUSEPPE |
分类号 |
G06F17/27;G10L15/00;G10L15/04;G10L15/18 |
主分类号 |
G06F17/27 |
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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