Abstract
Biological signals recorded in the nervous system contains rich information on the motions which have been applied for various prosthetic applications. It is essential to extract appropriate feature quantities from the signals to estimate the intention of the subject for voluntary movements. We have diverted the line spectrum pair (LSP) representation, which had been originally developed for speech coding, as a feature quantity for the biological signals directly recorded from the living body. In this paper, 2 examples of utilizing LSP for different biological signals are demonstrated. While the human myoelectric (EMG) signals have shown the ability of the LSP representation to estimate the hand shapes, the neural local field potentials (LFP) of a rat were used to detect its intention to walk.
