Arabic CTS Levantine Fisher Training Data Set 3, Speech

Item Name: Arabic CTS Levantine Fisher Training Data Set 3, Speech
Authors: Mohamed Maamouri and Hubert Jin
LDC Catalog No.: LDC2005S07
ISBN: 1-58563-325-9
Release Date: Jan 15, 2005
Data Type: speech
Sample Rate: 8000 Hz
Sampling Format: 1-channel ulaw
Data Source(s): telephone conversations, telephone speech
Project(s): EARS, GALE
Language(s): Levantine Arabic, North Levantine Arabic, South Levantine Arabic
Language ID(s): ajp, apc
Distribution: 1 DVD
Member fee: $0 for 2005 members
Non-member Fee: US $1000.00
Reduced-License Fee: US $500.00
Extra-Copy Fee: US $0.00
Non-member License: yes
Online documentation: yes
Licensing Instructions: Subscription & Standard Members, and Non-Members
Citation: Mohamed Maamouri and Hubert Jin
Arabic CTS Levantine Fisher Training Data Set 3, Speech
Linguistic Data Consortium, Philadelphia


Arabic CTS Levantine Fisher Training Data Set 3 Speech consists of 322 conversations, representing a total of about 50 hours of Levantine Arabic speech. The corresponding human annotated transcripts are contained in Arabic CTS Levantine Fisher Training Data Set 3, Transcripts (LDC2005T03).

The Fisher telephone conversation collection protocol was created at LDC to address a critical need of developers trying to build robust automatic speech recognition (ASR) systems. Previous collection protocols, such as CALLFRIEND and Switchboard-II and the resulting corpora, have been adapted for ASR research but were in fact developed for language and speaker identification respectively. Although the CALLHOME protocol and corpora were developed to support ASR technology, they feature small numbers of speakers making telephone calls of relatively long duration with narrow vocabulary across the collection. CALLHOME conversations are challengingly natural and intimate. Under the Fisher protocol, a very large number of participants each make a few calls of short duration speaking to other participants, whom they typically do not know, about assigned topics. This maximizes inter-speaker variation and vocabulary breadth although it also increases formality.

Previous protocols such as CALLHOME, CALLFRIEND and Switchboard relied upon participant activity to drive the collection. Fisher is unique in being platform driven rather than participant driven. Participants who wish to initiate a call may do so; however the collection platform initiates the majority of calls. Participants need only answer their phones at the times they specified when registering for the study.

To encourage a broad range of vocabulary, Fisher participants are asked to speak on an assigned topic which is selected at random from a list, which changes every 24 hours and which is assigned to all subjects paired on that day. Some topics are inherited or refined from previous Switchboard studies while others were developed specifically for the Fisher protocol.


Please examine this sample for an example of this corpus.


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