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在传统的话者确认评分级融合中,基频辅助系统会劣化主系统下表现较好的测试评分.针对此问题,给出一种利用阈值改进基频特征补偿性能的方法.在使用MFCC特征参数的主系统外构建使用短时基频特征的话者确认辅助系统,主系统下测试评分绝对值低于阈值时需要进行评分融合,否则直接采用主系统评分.采用本文方法保护了主系统下的优质测试结果,实验结果表明,本文的方法有效提高了基频特征对说话人确认主系统的补偿性能.
In the traditional speaker-confirming rating fusion, the fundamental-frequency assistant system will degrade the test score which performs well under the main system.Aiming at this problem, a method of using the threshold to improve the performance of the fundamental frequency compensation is proposed.With the MFCC feature parameters Of the main system to build a short-time base-frequency characteristics of the speaker to confirm the auxiliary system, the main system under the test score absolute value below the threshold need to score integration, or directly use the main system score. The method used to protect the quality of the main system The experimental results show that the method proposed in this paper can effectively improve the compensation performance of the main system with the fundamental frequency characteristics.