CSLU: Spoltech Brazilian Portuguese Version 1.0

Item Name: CSLU: Spoltech Brazilian Portuguese Version 1.0
Author(s): Mauricio C. Schramm, Luis Felipe R. Freitas, Adriano Zanuz, Dante Barone
LDC Catalog No.: LDC2006S16
ISBN: 1-58563-383-6
ISLRN: 386-396-917-783-5
DOI: https://doi.org/10.35111/kkda-b418
Release Date: April 17, 2006
Member Year(s): 2006
DCMI Type(s): Sound, Text
Sample Type: 1-channel pcm
Sample Rate: 44100
Data Source(s): microphone speech
Application(s): language identification, language modeling, language teaching, machine learning, machine translation
Language(s): Portuguese
Language ID(s): por
License(s): CSLU Agreement
Online Documentation: LDC2006S16 Documents
Licensing Instructions: Subscription & Standard Members, and Non-Members
Citation: Schramm, Mauricio C., et al. CSLU: Spoltech Brazilian Portuguese Version 1.0 LDC2006S16. Web Download. Philadelphia: Linguistic Data Consortium, 2006.


CSLU: Spoltech Brazilian Portuguese Version 1.0 was developed by the Center for Spoken Language Understanding (CSLU) and contains 5 hours of Portuguese microphone speech with phonetic and orthographic transcriptions. The utterances consist of both read speech (for phonetic coverage) and responses to questions (for spontaneous speech).

The corpus contains 480 speakers from a variety of regions in Brazil and 8,207 separate utterances. A total of 2,540 utterances have been transcribed at the word level (without time alignments), and 5,479 utterances have been transcribed at the phoneme level (with time alignments). Protocol design, recording, and transcription were performed by the Universidade Federal do Rio Grande do Sul and the Universidade de Caxias do Sul.


The data has been recorded at 44.1 kHz (mono, 16-bit) and stored in RIFF format. The recording was conducted with a direct connection from the microphone to the sound card. The sound card was SoundBlaster-compatible.

For the prompted sentences, the sentence was hidden from view when recording began, so that the speaker might utter the sentence more naturally. Verification of the recording quality was performed immediately after each utterance recording; the data-collection software allowed the speaker to re-record utterances in case the recording was not of sufficient quality. The acoustic environment was not controlled, in order to allow for background conditions that would occur in application environments.


For an example of the data in this corpus, please listen to this audio sample (WAV) and examine its transcript (TXT).


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