This file contains documentation about the TDT4 Multilingual Broadcast News
Speech Corpus; Linguistic Data Consortium (LDC) catalog number LDC2005S11,
ISBN number 1-58563-338-0.
This corpus was created by Linguistic Data Consortium with support from the
DARPA TIDES (Translingual Information Detection, Extraction and
Summarization) Program. This release contains the complete set of American
English, Modern Standard Arabic and Mandarin Chinese broadcast news audio
used in the 2002 and 2003 Topic Detection and Tracking technology
evaluations. The transcripts corresponding to the audio contained in this
release, along with newswire data and topic relevance annotations, can be
found in LDC Publication LDC2005T16,
TDT4 Multilingual Text and Annotations.
Topic Detection and Tracking (TDT) refers to automatic techniques for
finding topically related material in streams of data such as newswire and
broadcast news. Evaluation tasks in 2002 and 2003 included the segmentation
of a news source into stories, the tracking of known topics, the detection
of unknown topics, the detection of initial stories on unknown topics, and
the detection of pairs of stories on the same topic. Complete
documentation on the TDT evaluation program can be found on NIST's TDT website.
For further information about corpora and annotations to support the TDT
Program visit LDC's TDT
Please examine these wave files for an example of this corpus.
The initial July 2005 release contained an error in which a small number of files were misnamed. This error has been corrected. Customers who recevied the original should have also received the correction. If you ordered this publication before Nov. 1, 2005 and have not received a correction, please contact the LDC Membership Coordinator at
Portions © 2000-2001: Xinhua News Agency, Agence
France-Presse, New York Times, Associated Press Newswire, Zaobao, An-Nahar,
Al-Hayat, Nile TV, Voice of America, Public Radio International, Cable News
Network, American Broadcasting Corporation, National Broadcasting Company,
China National Radio, China Television System, China Central TV, China
Broadcasting System, © 2000-2001, 2005 Trustees of the University of Pennsylvania
The World is a co-production of Public Radio International and the British Broadcasting Corporation and is produced at WGBH Boston.