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NIST 2021 Speaker Recognition Evaluation Plan



Omid Sadjadi, Craig Greenberg, Elliot Singer, Lisa Mason, Douglas Reynolds


The 2021 Speaker Recognition Evaluation (SRE21) is the next in an ongoing series of speaker recognition evaluations conducted by the US National Institute of Standards and Technology (NIST) since 1996. The objectives of the evaluation series are (1) to effectively measure system-calibrated performance of the cur-rent state of technology, (2) to provide a common framework that enables the research community to explore promising new ideas in speaker recognition, and (3) to support the community in their development of advanced technology incorporating these ideas. The evaluations are intended to be of interest to all researchers working on the general problem of text-independent speaker recognition. To this end, the evaluations are designed to focus on core technology issues and to be simple and accessible to those wishing to participate. This document describes the task, the performance metric, data, and the evaluation protocol as well as rules/requirements for SRE21.


NIST SRE, speaker recognition, face recognition, multimodal fusion


Sadjadi, O. , Greenberg, C. , Singer, E. , Mason, L. and Reynolds, D. (2021), NIST 2021 Speaker Recognition Evaluation Plan, NIST SRE, [online],, (Accessed June 12, 2024)


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Created July 12, 2021, Updated November 29, 2022