公开(公告)号：US07092883B1

公开(公告)日：2006-08-15

申请号：US10254217

申请日：2002-09-25

申请人： Roberto Gretter ,  Giuseppe Riccardi

发明人： Roberto Gretter ,  Giuseppe Riccardi

IPC分类号： G10L15/14

CPC分类号： G10L15/08

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.

公开(公告)号：US07562010B1

公开(公告)日：2009-07-14

申请号：US11426225

申请日：2006-06-23

申请人： Roberto Gretter ,  Giuseppe Riccardi

发明人： Roberto Gretter ,  Giuseppe Riccardi

IPC分类号： G06F17/27 ,  G10L15/00 ,  G10L15/04 ,  G10L15/18

CPC分类号： G10L15/08

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.

摘要翻译： 用于确定单词置信度得分的系统和方法。 语音识别系统产生用于语音输入的字格。 使用前向 - 后向算法来确定单词格中的单词的后验概率。 接下来，为字格格定义时隙，并且对于至少部分地与特定时隙重叠的所有转换，具有相同字标签的转换的后验概率被组合用于那些转换。 组合后验概率用作置信度得分。 可以在特定时隙的竞争者转换上计算局部熵，并将其用作置信度得分。