TDT4 Multilingual Broadcast News Speech Corpus

Item Name: TDT4 Multilingual Broadcast News Speech Corpus
Author(s): Junbo Kong, David Graff
LDC Catalog No.: LDC2005S11
ISBN: 1-58563-338-0
ISLRN: 381-876-213-869-8
Release Date: May 15, 2005
Member Year(s): 2005
DCMI Type(s): Sound
Sample Type: 2-channel
Sample Rate: 16000
Data Source(s): broadcast news
Project(s): TIDES, TDT, GALE
Language(s): English, Standard Arabic, Mandarin Chinese
Language ID(s): eng, arb, cmn
License(s): LDC User Agreement for Non-Members
Online Documentation: LDC2005S11 Documents
Licensing Instructions: Subscription & Standard Members, and Non-Members
Citation: Kong, Junbo, and David Graff. TDT4 Multilingual Broadcast News Speech Corpus LDC2005S11. Web Download. Philadelphia: Linguistic Data Consortium, 2005.
Related Works: View


TDT4 Multilingual Broadcast News Speech Corpus was developed by the Linguistic Data Consortium (LDC) 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.


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. That error has been corrected. Users who received the original release should have also received the correction. Anyone who ordered this publication before Nov. 1, 2005 and has not received a correction should contact LDC's Membership Office at


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