Hybrid hidden Markov model neural network system for EMG signals recognition

This paper describes an approach for classifying electromyographic (EMG) signals using a multilayer perceptrons (MLP's) and hidden Markov models (HMM's) hybrid classifier. Instead of using MLP's as probability generators for HMM's we propose to use MLP's as the second classifiers to increase discrimination rates of myoelectric patterns. This strategy is proposed to overcome weak discrimination and to consider dynamic properties of EMG signlas. Two discrimination strategies (HMM, and HMM with three subnet MLP's) for discriminating signals representative of 6 primitive class of motions are described and compared. The proposed strategy increase the discrimination results considerably. Results are presented to support this approach.