Laboratory Conditions Czech Audio-Visual Speech Corpus
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Corpus tchèque audio-visuel enregistré en conditions de laboratoire
This is an audio-visual speech database for training and testing of Czech audio-visual continuous speech recognition systems. The corpus consists of about 25 hours of audio-visual records of 65 speakers in laboratory conditions. Data collection was done with static illumination, and recorded subjects were instructed to remain static.
The average speaker age was 22 years old. Speakers were asked to read 200 sentences each (50 common for all speakers and 150 specific to each speaker). The average total length of recording per speaker is 23 minutes.
All audio-visual data are transcribed (.trs files) and divided into sentences (one sentence per file). For each video file we get the description file containing information about the position and size of the region of interest.
Acoustic data are stored in wave files using PCM format, sampling frequency 44kHz, resolution 16 bits. Each speaker’s acoustic data set represents about 140 MB of disk space (about 9 GB as a whole).
Visual data are stored in video files (.avi format) using the digital video (DV) codec. Visual data per speaker take about 3 GB of disk (about 195 GB as a whole) and are stored on an IDE hard disk (NTFS format).
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