中文摘要：

提出了自动说话人识别系统得分到法庭证据强度量化值似然比的转换方法.为了更准确地评估嫌疑人的统计模型,提出了自适应同源方差控制算法,该算法能自适应地融合来自参考人群和嫌疑人的同源语音得分模型信息,降低了对嫌疑人数据量大小的需求.与基本识别系统相比的测试结果表明,使用该算法的识别系统不但具有更优良的识别性能和可靠性,而且提高了语音证据对判别结论的支持强度.

英文摘要：

This paper proposes a method to transfer the scores generated from a speaker recognition system to likelihood ratios （LR） for evaluating the strength of forensic voice evidence. A robust LR estimation algorithm using adaptive within-source-variance control is developed to accurately estimate a model of the suspect. The algorithm adaptively combines information of reference speakers and that of the suspect to model the within- source-variability of the suspect. Compared with a baseline recognition system, the system using the proposed algorithm has better discrimination capability and reliability, and the magnitude of evidence strength is also improved.