Efficient implementation and design of a new single-channel electrooculography-based human-machine interface system

Wu, J. F., Ang, A. M.S., Tsui, K. M., Wu, H. C., Hung, Y. S., Hu, Y., Mak, J. N.F., Chan, S. C. and Zhang, Z. G. (2014) Efficient implementation and design of a new single-channel electrooculography-based human-machine interface system. IEEE Transactions on Circuits and Systems II: Express Briefs, 62 (2), 179-183, [6949633]. (doi:10.1109/TCSII.2014.2368617).

Abstract

This brief introduces a new and practical human-machine interface (HMI) system based on single-channel electrooculography (EOG) signals. The proposed system uses a consumer wireless recording device to collect EOG and employs new encoding/decoding paradigms to convey users' intentions with EOG from eye movements including blinking and looking up. The simplicity and mobility of the system provides a comfortable and practical solution to HMI. Furthermore, to reduce the hardware complexity and power consumption of the signal processing modules of the EOG-based HMI system, a novel multiplierless implementation is developed, where all the algorithms involved, such as bandpass filtering, wavelet filtering, and support vector machine, can be realized using a limited number of adders and shifters only. Experimental results show that the proposed system offers a simple, practical, and yet reliable EOG-based HMI with low complexity and power consumption.

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Contributors

Author: A. M.S. Ang

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