Labelling speech using context-dependent acoustic prototypes
    1.
    发明授权
    Labelling speech using context-dependent acoustic prototypes 失效
    使用上下文相关的声学原型标注语音

    公开(公告)号:US5455889A

    公开(公告)日:1995-10-03

    申请号:US14966

    申请日:1993-02-08

    CPC分类号: G10L15/142

    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.

    摘要翻译: 本发明涉及在上下文相关语音识别系统中对语音的标注。 当使用上下文相关原型标注语音时,语音帧的电话上下文需要与适当的声学参数向量对准。 由于如果基于弧级排列大量的数据是很困难的,本发明使用与上下文无关的声学原型进行对准数据。 数据的每个电话的语音语境是已知的。 因此,在对准步骤之后,声学参数矢量用相应的语音上下文标记。 每个标签都存在与上下文相关的原型向量。 对于所有标签,确定与标记的声学参数矢量具有相同语音上下文的上下文相关原型矢量。 对于每个标签,确定具有与标记的声学参数矢量相同的语音上下文的上下文相关标签原型矢量中的每个标签声学参数矢量的概率。 具有最高概率的标签与上下文相关的声学参数矢量相关联。