1997 HUB5 English Evaluation

Item Name: 1997 HUB5 English Evaluation
Author(s): NIST Multimodal Information Group
LDC Catalog No.: LDC2002S23
ISBN: 1-58563-233-3
ISLRN: 972-929-534-164-6
DOI: https://doi.org/10.35111/y3en-gj62
Member Year(s): 2002
DCMI Type(s): Sound, Text
Sample Type: 2-channel ulaw
Sample Rate: 8000
Data Source(s): telephone conversations
Project(s): Hub5-LVCSR
Application(s): speech recognition
Language(s): English
Language ID(s): eng
Licensing Instructions: Subscription & Standard Members, and Non-Members
Citation: NIST Multimodal Information Group. 1997 HUB5 English Evaluation LDC2002S23. Web Download. Philadelphia: Linguistic Data Consortium, 2002.
Related Works: View


1997 HUB5 English Evaluation was developed by the Lingustic Data Consortium (LDC) and consists of English conversational telephone speech and associated transcripts used in the 1997 HUB5 evaluation sponsored by NIST (National Institute of Standards and Technology). 

The Hub5 evaluation series focused on conversational speech over the telephone with the particular task of transcribing conversational speech into text. Its goals were to explore promising new areas in the recognition of conversational speech, to develop advanced technology incorporating those ideas and to measure the performance of new technology. Further information about the evaluation can be found on the NIST HUB5 website and in The 1997 HUB-5E Evaluation Plan for Recognition of Conversational Speech over the Telephone in English, included in this release.


The source data consists of conversational telephone speech collected by LDC: (1) 20 telephone conversations from the Swtichboard-2 studies (LDC98S75, LDC99S79) in which recruited speakers were connected through a robot operator to carry on casual conversations about a daily topic announced by the robot operator at the start of the call; and (2) 20 telephone conversations from CALLHOME American English Speech which consists of unscripted telephone conversations between native English speakers.

The audio files are in sphere format. The sphere headers have been modified from the original evaluation data by the addition of sample checksums to the CALLHOME data files. The corresponding transcripts are presented in text format.


Please listen to this audio sample and view this transcript sample.


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Additional Licensing Instructions

This 'members-only' corpora is available to current members who can request the data at the listed reduced-license fee. Contact ldc@ldc.upenn.edu for information about becoming a member.

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