This paper presents a description of the MIT Lincoln Laboratory (MITLL) language recognition system developed for the NIST 2011 Language Recognition Evaluation (LRE). The submitted system consisted of a fusion of four core classifiers, three based on spectral similarity and one based on tokenization. Additional system improvements were achieved following the submission deadline. In a major departure from previous evaluations, the 2011 LRE task focused on closed-set pairwise performance so as to emphasize a system¡¦s ability to distinguish confusable language pairs. Results are presented for the 24-language confusable pair task at test utterance durations of 30, 10, and 3 seconds. Results are also shown using the standard detection metrics (DET, minDCF) and it is demonstrated the previous metrics adequately cover difficult pair performance. On the 30 s 24-language confusable pair task, the submitted and post-evaluation systems achieved average costs of 0.079 and 0.070 and standard detection costs of 0.038 and 0.033.
Cite as: Singer, E., Torres-Carrasquillo, P., Reynolds, D.A., McCree, A., Richardson, F., Dehak, N., Sturim, D. (2012) The MITLL NIST LRE 2011 language recognition system. Proc. The Speaker and Language Recognition Workshop (Odyssey 2012), 209-215
@inproceedings{singer12_odyssey,
author={Elliot Singer and Pedro Torres-Carrasquillo and Douglas A. Reynolds and Alan McCree and Fred Richardson and Najim Dehak and Doug Sturim},
title={{The MITLL NIST LRE 2011 language recognition system}},
year=2012,
booktitle={Proc. The Speaker and Language Recognition Workshop (Odyssey 2012)},
pages={209--215}
}