CSLU: S4X Release 1.2, Linguistic Data Consortium (LDC) catalog number LDC2009S03 and isbn 1-58563-523-5, was created by the Center for Spoken Language Understanding, Oregon Health and Science University (CSLU). The corpus consists of 36 speakers (22 male, 14 female) uttering 11 specified words.
The speakers repeated the following words six times on each of four channels: startrek, supernova, tektronix, generation, nebula, processing, singularity, 71523, abracadabra, sungeeta and computer. The four channels used were office phone, home phone, carbon microphone telephone and speaker phone. Each speech file has a corresponding time-aligned phoneme-level transcription (achieved using automatic forced alignment) and an automatically-generated world-level transcription.
Humans reviewed each utterance in two passes and classified it as good, bad, noisy or different. The results of this verification process are included in the /docs directory.
The data was recorded with the CSLU T1 digital data collection system. Each utterance is recorded as a separate file. These files were sampled at 8 khz 8-bit and stored as ulaw files. All of the data use the RIFF standard file format. This file format is 16-bit linearly encoded.
For an example of the data in this corpus, please listen to this recording of a subject speaking the word 'computer': SD-1030-computer-t3-67.
Portions © 1996, 1998, 2000, 2002 Center for Spoken Language Understanding, Oregon Health and Science University, © 2009 Trustees of the University of Pennsylvania