Journal of South China University of Technology (Natural Science Edition) ›› 2009, Vol. 37 ›› Issue (9): 47-51.

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

A Modified BIC Algorithm of Speaker Change Detection

Yang Ji-chen  He Qian-hua  Pan Wei-qiang  Xu Yi-jun  Li Yan-xiong   

  1. School of Electronic and Information Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China
  • Received:2009-03-05 Revised:2009-04-22 Online:2009-09-25 Published:2009-09-25
  • Contact: 杨继臣（1980-），男，博士生，主要从事语音信号处理研究． E-mail:NisonYoung@yahoo．cn
  • About author:杨继臣（1980-），男，博士生，主要从事语音信号处理研究．
  • Supported by:

    国家自然科学基金资助项目（60602014,60972132）

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Abstract:

In order to overcome such disadvantages as high computational cost and low detection precision existing in the speaker change detection with the Bayesian information criterion（BIC） algorithm,a modified BIC algorithm is proposed.In this algorithm,the maximum length of the first data window in the analysis window is restricted to reduce the computational cost,and the effective length,namely the detectability of the second data window in the analysis window is increased to improve the detection precision.Moreover, the growing computation without a long time speaker change is decreased by detecting potential speaker change points only in a new range. Experiment resuits show that, as compared with the conventional BIC algorithm, the proposed algorithm decreases the bias error from 0. 10 -0. 80 to 0. 03 - 0. 20, and saves 75 % of computation time for a 40-s analysis window.

Key words: speaker detection, modified Bayesian information criterion, detection precision, detectability, data window