NIST Meeting Pilot Corpus Speech

Item Name: NIST Meeting Pilot Corpus Speech
Author(s): John S. Garofolo, Martial Michel, Vincent M. Stanford, Elham Tabassi, Jonathan G. Fiscus, Christophe D. Laprun, Nicolas Pratz, Jerome Lard
LDC Catalog No.: LDC2004S09
ISBN: 1-58563-302-x
ISLRN: 706-538-229-826-0
Release Date: July 12, 2004
Member Year(s): 2004
DCMI Type(s): Sound
Sample Type: pcm
Sample Rate: 16000
Data Source(s): meeting speech, microphone conversation, microphone speech
Project(s): NIST Automatic Meeting Recognition
Application(s): automatic content extraction, discourse analysis, information retrieval, language modeling, speaker identification, speaker verification, speech recognition
Language(s): English
Language ID(s): eng
License(s): LDC User Agreement for Non-Members
Online Documentation: LDC2004S09 Documents
Licensing Instructions: Subscription & Standard Members, and Non-Members
Citation: Garofolo, John S., et al. NIST Meeting Pilot Corpus Speech LDC2004S09. Web Download. Philadelphia: Linguistic Data Consortium, 2004.
Related Works: View


NIST Meeting Pilot Corpus Speech was developed by the National Institutes of Standards and Technology (NIST) and contains approximately 15 hours of English meeting speech.

The corresponding transcripts for these speech files are available as NIST Meeting Pilot Corpus Transcripts and Metadata (LDC2004T13).

Huge efforts are being expended in mining information in newswire, news broadcasts, and conversational speech, however, little has been done to address such applications in the more challenging and equally important meeting domain. Meetings have several important properties not found in other domains, such as being diverse in formality and vocabulary, being highly interactive across multiple participants, using distant microphones, using overlapping camera views, and necessitating multi-media information integration.

The development of smart meeting room core technologies that can automatically recognize and extract important information from multi-media sensor inputs will provide an invaluable resource for a variety of business, academic, and governmental applications.


The data for the NIST Automatic Meeting Recognition Project was collected at the NIST Gaithersburg, MD, Meeting Data Collection Laboratory. This release contains 369 SPHERE audio files generated from 19 meetings (comprising about 15 hours of meeting room data and amounting to about 32 GB) recorded between November 2001 and December 2003.

Each meeting was recorded using two wireless "personal" mics attached to each meeting participant: a close-talking noise-cancelling boom mic and an omni-directional lapel mic. Each meeting was also recorded using three omni-directional table mics and a four-channel directional table mic covering 365 degrees (each channel is recorded in a separate file). Each individual channel was converted from its 48 kHz, 24-bits, linear PCM source format to 16 kHz, 16-bits, linear PCM-sampled audio SPHERE-formatted files.

A total of 61 subjects were involved in these meetings. The following is a breakdown by participant origin and gender:

  # Male Instances # Unique Males # Female Instances # Unique Females Total Participants Instances Total Unique Participants
Native 54 30 33 15 87 45
Non-Native 18 11 10 5 28 16
Total 72 41 43 20 115 61



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