Odyssey 2012 - The Speaker and Language Recognition Workshop

June 25-28, 2012

The MITLL NIST LRE 2011 Language Recognition System

Elliot Singer (1), Pedro Torres-Carrasquillo (1), Douglas A. Reynolds (1), Alan McCree (1), Fred Richardson (1), Najim Dehak (2), Doug Sturim (1)

(1) MIT Lincoln Laboratory; (2) Computer Science and Artificial Intelligence Laboratory
Massachusetts Institute of Technology, MA, USA

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.

Full Paper

Bibliographic reference.  Singer, Elliot / Torres-Carrasquillo, Pedro / Reynolds, Douglas A. / McCree, Alan / Richardson, Fred / Dehak, Najim / Sturim, Doug (2012): "The MITLL NIST LRE 2011 language recognition system", In Odyssey-2012, 209-215.