1. An information processing device for outputting a time series pattern, comprising: input means for inputting a time series pattern; model decision means for deciding a model based on a common nonlinear dynamic system having one or more feature parameters that can be operated from outside with respect to each of plural time series patterns inputted by the input means; arithmetic means for calculating a value of the feature parameter on the basis of the decided model; and output means for setting a value that is different from the value calculated by the arithmetic means, as the feature parameter, and performing inverse operation of the calculation of the value of the feature parameter, thereby outputting a new time series pattern.