I4U is a joint entry of nine research Institutes and Universities across 4 continents to NIST SRE 2012. It started with a brief discussion during the Odyssey 2012 workshop in Singapore. An online discussion group was soon set up, providing a discussion platform for different issues surrounding NIST SREf12. Noisy test segments, uneven multi-session training, variable enrollment duration, and the issue of open-set identification were actively discussed leading to various solutions integrated to the I4U submission. The joint submission and several of its 17 sub-systems were among top-performing systems. We summarize the lessons learnt from this large-scale effort.
Bibliographic reference. aizhou / Hansen, John H. L. / Bonastre, Jean-Francois / Marcel, S. / Mason, John S. D. / Ambikairajah, Eliathamby (2013): "I4u submission to NIST SRE 2012: a large-scale collaborative effort for noise-robust speaker verification", In INTERSPEECH-2013, 1986-1990.