CSLU: Portland Cellular Telephone Speech Version 1.3

Item Name: CSLU: Portland Cellular Telephone Speech Version 1.3
Authors: R. A. Cole, M. Fanty, M. Noel, T. Lander
LDC Catalog No.: LDC2008S01
ISBN: 1-58563-463-8
Release Date: Jan 22, 2008
Data Type: speech
Sample Rate: 8000 Hz
Sampling Format: ulaw
Data Source(s): telephone conversations
Language(s): English
Language ID(s): eng
Distribution: 1 CD
Member fee: $0 for 2008 members
Non-member Fee: US $150.00
Reduced-License Fee: US $150.00
Extra-Copy Fee: US $150.00
Non-member License: yes
Member License: yes
Online documentation: yes
Licensing Instructions: Subscription & Standard Members, and Non-Members
Citation: R. A. Cole, et al.
CSLU: Portland Cellular Telephone Speech Version 1.3
Linguistic Data Consortium, Philadelphia


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.

Recording Details

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.

Content Copyright

Portions 1995, 1998, 2000, 2002 Center for Spoken Language Understanding, Oregon Health & Science University, 2008 Trustees of the University of Pennsylvania