National Cellular Corpus
                            Release 2.3

              Center for Spoken Language Understanding

Release Version 2.3 (22 September 2002)
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We have added more orthographical transcriptions and created 
the phoneme time aligned transcriptions.


Release Version 2.2 (28 January 2002)
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this release includes all speech files (2337 speakers) 
from which 1996 speakers is transcriptef on world level.


Release Version 2.1 (22 August 2000)
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Several changes have been implemented that differentiate
this version of the National Cellular Corpus from version 
2.0. These changes include the following:

* Speech files in the /speech directory have been 
  converted from NIST format to RIFF format.

* Individual transcription files have been extracted 
  from the data.txt file. These individual files have 
  been placed in /trans directory which has a structure 
  that exactly parallels that of the /speech directory.

* The documentation has been updated so that it 
  accurately reflects the corpus contents.

These and other changes have been made to make the corpus
more useful to the end-user.


Release Version 2.0 
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Second release. Contains speech from 1350 (60% male, 40% female) 
speakers in nine cities.


Release Version 1.0
-------------------
First release. Contains speech from 676 (53% male, 47% female)
speakers in four cities.