A chaos-based model for low complexity predictive coding scheme for compression and transmission of electroencephalogram data.
A method for low complexity, low bit rate transmission of EEG (electroencephalogram) data, based on chaotic principles, is presented. The EEG data is assumed to be generated by a non-linear dynamical system of E dimensions. The E dynamical variables are reconstructed from the one-dimensional time series by the process of time-delay embedding. A model of the form X[n + 1] = F(X[n], X[n - 1], ... , X[n - p]) is fitted for the data in the E-dimensional space and this model is used as predictor in the predictive coding scheme for transmission. This model is able to give a reduction of nearly 50% of the dynamic range of the error signal to be transmitted, with a reduced complexity, when compared to the conventionally used linear prediction method. This implies that a reduced bit rate of transmission with a reduced complexity can be obtained. The effects of variation of model parameters on the complexity and bit rate are discussed.
Kavitha
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Department of Electrical Communication Engineering, Indian Institute of Science, Bangalore, India. vkavitha@protocol.ece.iisc.ernet.in
Dutt
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D000328:Adult; D004569:Electroencephalography; D006801:Humans; D008962:Models, Theoretical; D017711:Nonlinear Dynamics; D012815:Signal Processing, Computer-Assisted; D012890:Sleep / Q000502:physiology; D013686:Telemetry