Speech in Noisy Environments (SPINE2) Part 3 Audio

Item Name: Speech in Noisy Environments (SPINE2) Part 3 Audio
Author(s): Astrid Schmidt-Nielsen, Elaine Marsh, John Tardelli, Paul Gatewood, Elizabeth Kreamer, Thomas Tremain, Christopher Cieri, Stephanie Strassel, Nii Martey, David Graff, Cristina Tofan
LDC Catalog No.: LDC2001S08
ISBN: 1-58563-210-4
ISLRN: 546-593-184-777-5
DOI: https://doi.org/10.35111/xb57-5p22
Release Date: January 14, 2002
Member Year(s): 2001, 2002
DCMI Type(s): Sound
Sample Rate: 16000
Data Source(s): microphone speech
Project(s): SPINE
Application(s): speech recognition
Language(s): English
Language ID(s): eng
License(s): LDC User Agreement for Non-Members
Online Documentation: LDC2001S08 Documents
Licensing Instructions: Subscription & Standard Members, and Non-Members
Citation: Schmidt-Nielsen, Astrid, et al. Speech in Noisy Environments (SPINE2) Part 3 Audio LDC2001S08. Web Download. Philadelphia: Linguistic Data Consortium, 2001.
Related Works: View


Speech in Noisy Environments (SPINE2) Part 3 Audio was used as the evaluation set for the Second Speech in Noisy Environments Evaluation (SPINE2). SPINE2 provided a continuing forum for assessing the state of the art and practice in speech recognition technology for noisy military environments and for exchanging information on innovative speech recognition technology in the context of fully implemented systems that perform realistic tasks. The evaluation provided researchers, potential sponsors, and customers with a quantitative means to appreciate the strengths and weaknesses of the technologies.

This work was sponsored in part by National Science Foundation Grant No. IIS-9982201.


This release contains the Speech in Noisy Environments 2 (SPINE2) Clean and Vocoded Evaluation Audio Corpus created for the Department of Defense (DoD) Digital Voice Processing Consortium (DDVPC) by Arcon Corp. The transcripts for this publication are available as Speech in Noisy Environments (SPINE2) Evaluation Transcripts LDC2001T09. These corpora supported the 2001 Speech in Noisy Environments evaluation.

The evaluation data comprises 16 talker pairs (32 speakers total) with four conversations (sessions) per talker pair (64 conversations total).

The audio for each session is presented in three forms:

  • Unprocessed: the signal recorded at the participant's microphone
  • Bitstream: the compressed "channel" data produced by the vocoder's analysis stage for transmission from sender to receiver
  • Processed: the signal produced by the vocoder's synthesis stage, given the bitstream data as input.

There are a total of 64 clean audio files and 64 vocoded files, one "game" each, for a rough total of seven hours (423 minutes) of audio data, 1.6Gb (including the unprocessed, the processed, and the bitstream files), 23,300 total tokens (930 unique tokens).


Please view this unprocessed sample and processed sample.


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