Modifications on NIST MarkIII Array to Improve Coherence Properties Among Input Signals

Bertotti C, Brayda LG, Cristoforetti L, Omologo M, Svaizer P. Modifications on NIST MarkIII Array to Improve Coherence Properties Among Input Signals. In: AES Convention 118. Audio Engineering Society; 2005. Paper 6488. Available from: https://aes.org/publications/elibrary-page/?id=13204

@inproceedings{Bertotti2005_13204,
  author = {Bertotti, Claudio and Brayda, Luca-Giulio and Cristoforetti, Luca and Omologo, Maurizio and Svaizer, Piergiorgio},
  title = {{Modifications on NIST MarkIII Array to Improve Coherence Properties Among Input Signals}},
  booktitle = {AES Convention 118},
  note = {Paper 6488},
  year = {2005},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=13204}
}

TY  - CPAPER
TI  - Modifications on NIST MarkIII Array to Improve Coherence Properties Among Input Signals
AU  - Bertotti, Claudio
AU  - Brayda, Luca-Giulio
AU  - Cristoforetti, Luca
AU  - Omologo, Maurizio
AU  - Svaizer, Piergiorgio
T2  - AES Convention 118
M1  - Paper 6488
PY  - 2005
DA  - 2005/05/06
UR  - https://aes.org/publications/elibrary-page/?id=13204
PB  - Audio Engineering Society
LA  - en
AB  - This work describes an activity that allowed to realize a modified NIST MarkIII array. This system is able to acquire 64 synchronous audio signals at 44.1 kHz and is primarily conceived for far-field automatic speech recognition and speaker localization. Preliminary experiments conducted on the original array had showed that coherence among a generic pair of signals was affected by a bias due to common mode electrical noise, which turned out to be detrimental for time delay estimation techniques applied to co-phase signals or to localize speakers. A hardware intervention was realized to remove each internal noise source from analog modules of the device. The modified array provides a quality of input signals that fits results expected by theory.
ER  -