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《ACTA ELECTRONICA SINICA》 2000-03
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A Study of Error-Tolerant Techniques for Speech Underst anding

ZHANG Jian ping,WANG Zuo ying,ZHAO Qing wei,LU Da jin(Department of Electronic Engineering,Tsinghua University,Beijing 100084,China)  
In this paper,error tolerant techniques are studied for large vocabulary speaker independent Chinese continuous speech recognition and understanding systems.When N best syllable candidates with their corresponding acoustic scores are generated and a syllable lattice is constructed by the acoustic recognizer,an error tolerant linguistic parser is used to search through the syllable lattice and find the optimal Chinese character sequence in which syllables of some characters may not be included in the lattice because additional possible candidates are considered.In such a way,some acoustic errors are corrected and the robustness of the parser is improved.Our experiments show that the error tolerant parser can increase the understanding rate from 91 83%,a 28 4% error reduction over the conventional trigram model based parser without error tolerant techniques.
【Fund】: 国家 8 63高科技计划项目 !(No .863 30 6 0 3 0 2 1 )
【CateGory Index】: TN912
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