CSLU: Portland Cellular Telephone Speech Version 1.3
was created by the Center for Spoken Language Understanding (CSLU) at OGI School
of Science and Engineering, Oregon Health and Science University, Beaverton,
Oregon. It consists of cellular telephone speech and corresponding transcripts,
specifically, 7,571 utterances from 515 speakers who made calls in the Portland,
Oregon area using cellular telephones.
Speakers called the CSLU data collection system on cellular telephones, and
they were asked to repeat certain phrases and to respond to other prompts. Two
prompt protocols were used: an In Vehicle Protocol for speakers calling from
inside a vehicle and a Not in Vehicle Protocol for those calling from outside
a vehicle. The protocols shared several questions, but each protocol contained
distinct queries designed to probe the conditions of the caller's in vehicle/not
in vehicle surroundings. Not every caller provided a response to each prompt.
The speeech data was captured digitally from CSLU's T1 connection and saved
as 8 khz, 16-bit linear.
The text transcriptions in this corpus were produced using the non time-aligned
word-level conventions described in The CSLU Labeling Guide, which is included
in the documentation for this release. CSLU: Portland Cellular Telephone Speech Version 1.3
contains orthographic and phonetic transcriptions of corresponding speech files.
Non time-aligned orthographic transcriptions provide quick access to the content
of an utterance; they may contain markers for word boundaries to support access
and retrieval at the lexical level. Phonetic/phonemic transcriptions represent
the phonetic content of an utterance at a given level of detail that is made
explicit by the use of diacritics. Phonetic phenomena transcribed includes excessive
nasalization, glottalization, frication on a stop, centralization, lateralization,
rounding and palatalization.
For an example of the data in this corpus, please examine the following audio file and transcript.
Portions © 1995, 1998, 2000, 2002 Center for Spoken Language Understanding,
Oregon Health & Science University, © 2008 Trustees of the University of