基于不同音素概率分布的发音质量分数映射方法

来源 :第十一届全国人机语音通讯学术会议 | 被引量 : 0次 | 上传用户:tianjinajun
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  现有的计算机辅助语言学习系统(Computer Assisted Language Learning,CALL)在得到GOP分数之后,对所有的音素都使用相同的映射函数计算相应的句子得分,忽略了不同音素发音之间的差异性。本文提出了一种使用专家评分语音对GOP分数归一化处理的新方法“概率分布映射算法” (probability distribution mapping algorithm,PDMA)。PDMA使用统计概率分布和分数映射的方法对GOP得分进行修正 以提高机器评分和专家评分的相关度。实验结果表明,使用该算法使修正后的GOP得分与专家评分的句子相关度在实验室已有的基线系统上提高了4.93%。
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