发明授权
- 专利标题: Labelling speech using context-dependent acoustic prototypes
- 专利标题(中): 使用上下文相关的声学原型标注语音
-
申请号: US14966申请日: 1993-02-08
-
公开(公告)号: US5455889A公开(公告)日: 1995-10-03
- 发明人: Lalit R. Bahl , Peter de Souza , P. S. Gopalakrishnan , Michael A. Picheny
- 申请人: Lalit R. Bahl , Peter de Souza , P. S. Gopalakrishnan , Michael A. Picheny
- 申请人地址: NY Armonk
- 专利权人: International Business Machines Corporation
- 当前专利权人: International Business Machines Corporation
- 当前专利权人地址: NY Armonk
- 主分类号: G10L15/10
- IPC分类号: G10L15/10 ; G10L15/02 ; G10L15/14 ; G10L15/18 ; G10L15/28 ; G10L5/06 ; G10L9/00
摘要:
The present invention relates to labelling of speech in a context-dependent speech recognition system. When labelling speech using context-dependent prototypes the phone context of a frame of speech needs to be aligned with the appropriate acoustic parameter vector. Since aligning a large amount of data is difficult if based upon arc ranks, the present invention aligns the data using context-independent acoustic prototypes. The phonetic context of each phone of the data is known. Therefore after the alignment step the acoustic parameter vectors are tagged with a corresponding phonetic context. Context-dependent prototype vectors exists for each label. For all labels the context-dependent prototype vectors having the same phonetic context as the tagged acoustic parameter vector are determined. For each label the probability of achieving the tagged acoustic parameter vector is determined given each of the context-dependent label prototype vectors having the same phonetic context as the tagged acoustic parameter vector. The label with the highest probability is associated with the context-dependent acoustic parameter vector.
公开/授权文献
- US6036739A Knitted felt filtration media 公开/授权日:2000-03-14