Create the VIAT test corpus with the help of some Shell-Scripts and Matlab files. Telephone Spam files are also included. Loads 16Bit 8kHz PCM wave data, modifies and writes to given output directory. Other samplerates should be possible but needs some changes in the scripts.
Be sure to have sox and ffmpeg installed for GSM and G726
The Spit corpus consists of 200 files and is based on 20 real telephone-SPAM recordings. In order to test the robustness of the algorithm, the 20 SPAM files were intentionally altered by noise, audio- and telephone codecs.
The alterations in detail are:
1. original
2. G726 16 kbps
3. G726 32 kbps
4. GSM fullrate
5. mp3-codec 32 kbps
6. mp3-codec 96 kbps
7. pink noise 20dB SNR
8. white noise 20dB SNR
9. packet loss 5%
10. packet loss 10%
Naming Convention:
SPIT_xx_AlterationName.wav (e.g.: SPIT_04_gsm.wav)
possible alteration names are:
gsm
g726_16
g726_32
n20p
n20w
loss5
loss10
32_kbps
96_kbps
known issues:
- noise is not computed on the fly! could be detected by highly sensitive matching algorithm
- do not use spaces in file path
Cologne University of Applied Sciences
Institut für Nachrichtentechnik
Gary Grutzek 08/2012
Dependencies:
ffmpeg http://ffmpeg.org
SOX http://sox.sourceforge.net
mp3write, mpg123 and mp3info http://labrosa.ee.columbia.edu/matlab/mp3read.html