The 2001 NIST Speaker Recognition Evaluation Corpus was produced by the
Linguistic Data Consortium (LDC); catalog number LDC2002S34 and ISBN
The 2001 NIST Speaker Recognition Evaluation is part of an
ongoing series of yearly evaluations conducted by NIST. These evaluations
provide an important contribution to the direction of research efforts and
the calibration of technical capabilities. They are intended to be of
interest to all researchers working on the general problem of text
independent speaker recognition. To this end the evaluation was designed to
be simple, to focus on core technology issues, to be fully supported, and
to be accessible.
The corpus is based entirely on conversational cellular telephone speech
collected by the LDC.
Supporting documentation for this evaluation may be found on the 2001 NIST Speaker Recognition Evaluation
website. Consult the NIST evaluation plan for detailed instructions
on using this evaluation material.
The files are divided into evaluation and development data. There are a
total of 2,350 compressed speech files, all of which are in sphere format.
The sphere files are compressed and encoded in one channel 8-bit mulaw, for
a total of 575,337,198 bytes (548.7 Mbytes), or 26 hours of sphere data.
The evaluation data is divided into evaluation training data and evaluation
test data. The training data consists of 174 speech files that are two minutes
long. The test data comprises 2,038 speech files of varying lengths not
exceeding sixty seconds.
The development data is similarly divided into development training data and
development test data. The training data comprises 60 speech files with
durations of two minutes per target speaker. The 78 development test data
files contain segments of varying length not exceeding 60 seconds.
No updates are available at this time.
Portions © 1997-2002 Trustees of the University of Pennsylvania