Real-time voice activity detection for ECoG-based speech brain machine interfaces

Vasileios G. Kanas, Iosif Mporas, Heather L. Benz, Kyriakos N. Sgarbas, Anastasios Bezerianos, Nathan E. Crone

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this article, we investigated the performance of a real-time voice activity detection module exploiting different time-frequency methods for extracting signal features in a subject with implanted electrocorticographic (ECoG) electrodes. We used ECoG signals recorded while the subject performed a syllable repetition task. The voice activity detection module used, as input, ECoG data streams, on which it performed feature extraction and classification. With this approach we were able to detect voice activity (speech onset and offset) from ECoG signals with high accuracy. The results demonstrate that different timefrequency representations carried complementary information about voice activity, with the S-transform achieving 92% accuracy using the 86 best features and support vector machines as the classifier. The proposed real-time voice activity detector may be used as a part of an automated natural speech BMI system for rehabilitating individuals with communication deficits.

Original languageEnglish (US)
Title of host publication2014 19th International Conference on Digital Signal Processing, DSP 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages862-865
Number of pages4
ISBN (Electronic)9781479946129
DOIs
StatePublished - Jan 1 2014
Event2014 19th International Conference on Digital Signal Processing, DSP 2014 - Hong Kong, Hong Kong
Duration: Aug 20 2014Aug 23 2014

Publication series

NameInternational Conference on Digital Signal Processing, DSP
Volume2014-January

Other

Other2014 19th International Conference on Digital Signal Processing, DSP 2014
CountryHong Kong
CityHong Kong
Period8/20/148/23/14

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Keywords

  • Brain-machine interfaces (BMIs)
  • Electrocorticography (ECoG)
  • Time-frequency analysis
  • Voice activity detection

ASJC Scopus subject areas

  • Signal Processing

Cite this

Kanas, V. G., Mporas, I., Benz, H. L., Sgarbas, K. N., Bezerianos, A., & Crone, N. E. (2014). Real-time voice activity detection for ECoG-based speech brain machine interfaces. In 2014 19th International Conference on Digital Signal Processing, DSP 2014 (pp. 862-865). [6900790] (International Conference on Digital Signal Processing, DSP; Vol. 2014-January). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICDSP.2014.6900790