A non-linear predictor for differential pulse-code encoder (DPCM) using artificial neural networks

A nonlinear predictor is designed for a DPCM encoder using artificial neural networks (ANN). The predictor is based on a multilayer perceptron with three input nodes, 30 hidden nodes and one output node. The back-propagation learning algorithm is used for the training of the network. Simulation results are presented to evaluate and compare the performance of the neural net based predictor (nonlinear) with that of an optimized linear predictor. Success in the use of the nonlinear predictor is demonstrated through the reduction in the entropy of the differential error signal as compared to that of a linear predictor. Also it is shown that the ANN predictor is much more robust for encoding noisy images compared to that of a linear predictor