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清华大学学报(自然科学版)  2017, Vol. 57 Issue (3): 240-243    DOI: 10.16511/j.cnki.qhdxxb.2017.26.003
  计算机科学与技术 本期目录 | 过刊浏览 | 高级检索 |
全变量系统和支持向量机结合的说话人确认
郭武1, 张圣1, 徐杰2, 胡国平3, 马啸空1
1. 中国科学技术大学 电子工程与信息科学系, 合肥 230026;
2. 国家计算机网络应急技术处理协调中心, 北京 100029;
3. 科大讯飞股份有限公司, 合肥 230088
Speaker verification based on SVM and total variability
GUO Wu1, ZHANG Sheng1, XU Jie2, HU Guoping3, MA Xiaokong1
1. Department of Electronic Engineering and Information Science, University of Science and Technology of China, Hefei 230026, China;
2. National Computer Network Emergency Response Technical Team Coordination Center of China, Beijing 100029, China;
3. IFLYTEK Corporation, Hefei 230088, China
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摘要 基于全变量因子分析和概率线性区分性分析的算法是目前与文本无关的说话人确认的主流算法。该文将全变量分析和支持向量机结合起来,把低维的全变量因子作为支持向量机的输入特征,并采用余弦核函数来增强低维特征的区分性,该系统取得了与当前主流算法相当的性能;进一步,将此系统得分和概率线性鉴别分析系统得分融合起来可以取得明显的性能提升。在NIST 2012说话人评测通用测试条件的女声部分,融合后的系统在情境一和三的检测代价函数相对最好的单系统分别下降了25.1%和25.2%。
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郭武
张圣
徐杰
胡国平
马啸空
关键词 说话人确认全变量系统支持向量机核函数    
Abstract:The total variability factor extractor and the probability linear discriminant analysis (PLDA) algorithms have been the state-of-the-art for text-independent speaker verification. This study combines a support vector machine (SVM) with the PLDA. The low dimensional i-vectors of the total variability system are used as the inputs to the support vector machine, with the cosine kernel function used to achieve better discrimination. This method achieves considerable performance improvement with the PLDA system. Furthermore, the score fusion of the SVM with the PLDA give even better results. Tests were conducted on the female part of the interview section of the NIST 2012 core test corpus. The detection cost function (DCF) of the fusion system was reduced by 25.1% for common condition 1 and 25.2% for condition 3 compared with the best results for a single system.
Key wordsspeaker verification    total variability    support vector machine    kernel function
收稿日期: 2016-06-21      出版日期: 2017-03-15
ZTFLH:  TN912.34  
引用本文:   
郭武, 张圣, 徐杰, 胡国平, 马啸空. 全变量系统和支持向量机结合的说话人确认[J]. 清华大学学报(自然科学版), 2017, 57(3): 240-243.
GUO Wu, ZHANG Sheng, XU Jie, HU Guoping, MA Xiaokong. Speaker verification based on SVM and total variability. Journal of Tsinghua University(Science and Technology), 2017, 57(3): 240-243.
链接本文:  
http://jst.tsinghuajournals.com/CN/10.16511/j.cnki.qhdxxb.2017.26.003  或          http://jst.tsinghuajournals.com/CN/Y2017/V57/I3/240
  表1 不同输入特征矢量实验对比
  表2 SVM 系统一系列实验对比
  表3 余弦核SVM 下不同规整方法对比
  表4 系统得分融合前后的性能对比
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