An Investigation into Back-end Advancements for Speaker Recognition in Multi-Session and Noisy Enrollment Scenarios

This study aims to explore the case of robust speaker recognition with multi-session enrollments and noise, with an emphasis on optimal organization and utilization of speaker information presented in the enrollment and development data. This study has two core objectives. First, we investigate more robust back-ends to address noisy multi-session enrollment data for speaker recognition. This task is achieved by proposing novel back-end algorithms. Second, we construct a highly discriminative speaker verification framework. This task is achieved through intrinsic and extrinsic back-end algorithm modification, resulting in complementary sub-systems. Evaluation of the proposed framework is performed on the NIST SRE2012 corpus. Results not only confirm individual sub-system advancements over an established baseline, the final grand fusion solution also represents a comprehensive overall advancement for the NIST SRE2012 core tasks. Compared with state-of-the-art SID systems on the NIST SRE2012, the novel parts of this study are: 1) exploring a more diverse set of solutions for low-dimensional i-Vector based modeling; and 2) diversifying the information configuration before modeling. All these two parts work together, resulting in very competitive performance with reasonable computational cost.