| 一种快速的语音识别词图生成算法 |
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| 引用本文： | 李伟,吴及,王智国.一种快速的语音识别词图生成算法[J].清华大学学报(自然科学版),2009(Z1). |
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| 作者姓名： | 李伟 吴及 王智国 |
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| 作者单位： | 清华大学电子工程系; |
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| 基金项目： | 国家“十一五”科技攻关项目;;国家“八六三”高技术项目(2006AA01Z149) |
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| 摘 要： | 词图的高效生成算法是语音识别领域的重要研究课题。该文提出了一种基于词格的词图生成算法(trellis-based lattice-generating algorithm,TBLG),该算法在正向Viterbi解码生成的词格(trellis)基础上,进行反向A*解码生成词图。实验结果表明,与经典的解码器HDecode相比,TBLG生成的词图最优备选效果优于Hdecode。生成高密度词图时,TBLG在解码速度上远远快于HDecode。同时在相同识别率下,TBLG算法生成的词图更加简洁。
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| 关 键 词： | 语音识别 词图 解码 正向-反向算法 |
Fast lattice generation algorithm |
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| LI Wei,WU Ji,WANG Zhiguo.Fast lattice generation algorithm[J].Journal of Tsinghua University(Science and Technology),2009(Z1). |
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| Authors: | LI Wei WU Ji WANG Zhiguo |
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| Institution: | Department of Electronic Engineering;Tsinghua University;Beijing 100084;China |
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| Abstract: | High efficiency generating lattices is an important area in speech recognition.This paper presentes a trellis based lattice generation algorithm(TBLG).This method uses a backward A* algorithm based on trellises generated by the forward Viterbi decoding to generate the lattices.Experiments show that the lattices generated by this algorithm have better 1-best results than the classical decoder HDecode,the algorithm is much faster than HDecode When generating high-density lattices,and the lattices are much sma... |
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| Keywords: | speech recognition lattice decoding forward-backward algorithm |
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