arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1509.01899cs.CL
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将文档排序信息融入口语词检测的置信度计算

Integrate Document Ranking Information into Confidence Measure Calculation for Spoken Term Detection

University of Science and Technology of China(中国科学技术大学)

Quan Liu, Wu Guo, Zhen-Hua Ling

摘要:

提出了一种改进的口语词检测置信度计算算法。给定一个输入的查询词,该算法首先计算一个度量命名为文档排序权重的语音数据库中的每个文件,以反映其与查询词的相关性,通过对所有的置信度的措施,在此文件中的假设的条件出现。然后通过线性插值与计算的文档排序权重重新估计每个术语出现的置信度,以通过整合文档级信息来提高其可靠性。实验分别在泰米尔语、越南语和英语三种标准STD任务上进行。实验结果表明,该算法实现了一致的改进,比国家的最先进的方法的置信度计算。此外,该算法在没有高精度语音识别器的情况下仍然有效,适用于语音资源有限的语言。

英文摘要:

This paper proposes an algorithm to improve the calculation of confidence measure for spoken term detection (STD). Given an input query term, the algorithm first calculates a measurement named document ranking weight for each document in the speech database to reflect its relevance with the query term by summing all the confidence measures of the hypothesized term occurrences in this document. The confidence measure of each term occurrence is then re-estimated through linear interpolation with the calculated document ranking weight to improve its reliability by integrating document-level information. Experiments are conducted on three standard STD tasks for Tamil, Vietnamese and English respectively. The experimental results all demonstrate that the proposed algorithm achieves consistent improvements over the state-of-the-art method for confidence measure calculation. Furthermore, this algorithm is still effective even if a high accuracy speech recognizer is not available, which makes it applicable for the languages with limited speech resources.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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