中文摘要：

手机来源识别已成为多媒体取证领域重要的热点问题。提出了一种基于语音静音段特征的手机来源识别方法，该方法先通过使用自适应端点检测算法得到语音的静音段；然后将静音段的梅尔频谱系数（MFC）的均值作为分类特征；最后结合WEKA平台的CfsSubsetEval评价函数按照最佳优先（BestFirst）搜索进行特征选择，并采用支持向量机（SvM）对手机来源进行识别。实验部分对23款主流型号的手机进行了分类，结果表明所提特征具有较好的分类性能，在T1MIT数据库和自建的CKC—SD数据库上，平均识别准确率分别为99．23％和199．00％。另外，与语音段MFC特征和梅尔倒谱系数（MFCC）特征进行了对比，实验结果证明所提特征具有更加优越的性能。

英文摘要：

Source cell-phone identification has become a hot topic in multimedia forensics. A novel cell-phone identifi- cation method was proposed based on the silent segments of recorded speech. Firstly, the silent segments were obtained using adaptive endpoint detection algorithm. Then, the mean of Mel frequency coefficients （MFC） was extracted as the characteristics for device identification. Finally, the CfsSubsetEval evaluation function of WEKA platform was selected according to the best priority （BestFirst） search, and support vector machine （SVM） was used for classification. Twen- ty-three popular models of the cell-phones were evaluated in the experiment. Experimental results show that the pro- posed method is feasible and the average recognition rates are 99.23% and 99.00% on the TIMIT database and the CKC-SD database. At the same time, the proposed feature performs was demonstrated better than the MFC features and the Mel frequency cepstrum coefficients （MFCC） features of the speech segments.