INFORMATION PROCESSING SYSTEM, ENCODING DEVICE, DECODING DEVICE, MODEL LEARNING DEVICE, INFORMATION PROCESSING METHOD, ENCODING METHOD, DECODING METHOD, MODEL LEARNING METHOD, AND PROGRAM STORAGE MEDIUM

A first distribution estimating device determines a first probability distribution of quantized values in a predetermined value range corresponding to an input value, by using a first machine learning model. A first sampling device samples the quantized values and determines a first sample value, using the first probability distribution. A second distribution estimating device determines a second probability distribution corresponding to the first sample value, by using a second machine learning model. A second sampling device samples the quantized values in the value range and determines a second sample value, using the second probability distribution. It can be implemented in the form of any of an information processing system, an encoding device, a decoding device, a model learning device, an information processing method, an encoding method, a decoding method, a model learning method, and a program storage medium.