Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Speaker Recognition


The goal of the NIST Speaker Recognition Evaluation (SRE) series is to contribute to the direction of research efforts and the calibration of technical capabilities of text independent speaker recognition. The overarching objective of the evaluations has always been to drive the technology forward, to measure the state-of-the-art, and to find the most promising algorithmic approaches.


NIST has been coordinating Speaker Recognition Evaluations since 1996. Since then over 70 research sites have participated in our evaluations. Each year new researchers in industry and universities are encouraged to participate. Collaboration between universities and industries is also welcomed.

Each evaluation begins with the announcement of the official evaluation plan which clearly states the rules and tasks involved with the evaluation. The evaluation culminates with a follow-up workshop, where NIST reports the official results and researchers share in their findings. The current plan is to have an evaluation once every two years.

Current Evaluation:

The next evaluation is currently planned for the fall of 2023.  Check back here for details.

Past Evaluation Plans and Results:


  Evaluation Plan Evaluation Summary Evaluation Results
SRE21 SRE21 Evaluation Plan   SRE21 Results
SRE19 SRE19 Evaluation Plans  

SRE19 CTS Challenge,

SRE19 Audio-Visual

SRE18 SRE18 Evaluation Plan   SRE18 Results
SRE16 SRE16 Evaluation Plan   SRE16 Results
SRE12 SRE12 Evaluation Plan SRE12 Summary SRE12 Results
SRE10 SRE10 Evaluation Plan SRE10 Summary SRE10 Results
SRE08 SRE08 Evaluation Plan SRE08 Summary SRE08 Results
SRE06 SRE06 Evaluation Plan   SRE06 Results
SRE05 SRE05 Evaluation Plan   SRE05 Results
SRE04 SRE04 Evaluation Plan   SRE04 Results
SRE03 SRE03 Evaluation Plan   SRE96 - SRE2003 Results
SRE02 SRE02 Evaluation Plan   SRE96 - SRE2003 Results
SRE01 SRE01 Evaluation Plan   SRE96 - SRE2003 Results
SRE00 SRE00 Evaluation Plan   SRE96 - SRE2003 Results
SRE99 SRE99 Evaluation Plan   SRE96 - SRE2003 Results
SRE98 SRE98 Evaluation Plan   SRE96 - SRE2003 Results
SRE97 SRE97 Evaluation Plan   SRE96 - SRE2003 Results
SRE96     SRE96 - SRE2003 Results


Created January 24, 2011, Updated October 26, 2023