2010 NIST Speaker Recognition Evaluation Test Set
Version: 1 – Released: Fri Apr 28 13:10:50 PDT 2017
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Data Citation Details
Title2010 NIST Speaker Recognition Evaluation Test Set
Study Global IDhdl:11272/V7OXL
Other IDLinguistic Data Consortium: LDC2017S06; ISBN: 1-58563-795-5; ISLRN: 429-091-121-265-4
AuthorsGreenberg, Craig; Martin, Alvin; Graff, David; Brandschain, Linda; Walker, Kevin
ProducerLinguistic Data Consortium (LDC), University of Pennsylvania
Production DateApril 17, 2017
Production PlacePhiladelphia
DistributorLinguistic Data Consortium (LDC), University of Pennsylvania
Deposit DateApril 28, 2017
SeriesLDC, Linguistic Data Consortium
Versionv1.0, April 17, 2017
Original Dataverse
Description and Scope


2010 NIST Speaker Recognition Evaluation Test Set was developed by the Linguistic Data Consortium (LDC) and NIST (National Institute of Standards and Technology). It contains 2,255 hours of American English telephone speech and speech recorded over a microphone channel involving an interview scenario used as test data in the NIST-sponsored 2010 Speaker Recognition Evaluation (SRE).

The ongoing series of SRE yearly evaluations conducted by NIST are intended to be of interest to researchers working on the general problem of text independent speaker recognition. To this end the evaluations are designed to be simple, to focus on core technology issues, to be fully supported and to be accessible to those wishing to participate.

The 2010 evaluation was similar to the 2008 evaluation by including in the training and test conditions for the core test not only conversational telephone speech (CTS) recorded over ordinary telephone channels, but also CTS and conversational interview speech recorded over a room microphone channel. Unlike prior evaluations, some of the conversational telephone style speech was collected in a manner to produce particularly high, or particularly low, vocal effort on the part of the speaker of interest.


The speech recordings in this release were collected in 2009 and 2010 by LDC at its Human Subjects Collection facility in Philadelphia. This collection was part of the Mixer 6 project, which was designed to support the development of robust speaker recognition technology by providing carefully collected and audited speech from a large pool of speakers recorded simultaneously across numerous microphones.

The telephone speech segments include two-channel excerpts of approximately 10 seconds and 5 minutes. There are also summed-channel excerpts in the range of 5 minutes. The microphone excerpts are 3-15 minutes in duration. As in prior evaluations, intervals of silence were not removed. The data included in this release is 8 bit ulaw with a sample rate of 8000.

In addition to evaluation data, this package also consists of answer keys, trial and train files, development data and evaluation documentation.

Description DateApril 17, 2017
KeywordsLinguistics (ACV)
Time Period Covered2009 - 2010
Date of Collection2009 - 2010
Country/NationUnited States (US)
Kind of DataLinguistic data
Data Collection / Methodology
Data SourcesMicrophone speech, Telephone speech
Data Availability
Number of Files 2
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Other Information
NotesInfo (DCMI type) Sound; Info (Sample type) ulaw; Info (Sample rate) 8000; Info (Application) Speech recognition; Info (Language) English; Info (Language ID) eng; Info (Project) NIST LRE
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"2010 NIST Speaker Recognition Evaluation Test Set", hdl:11272/V7OXL