Patent US 5,675,714

A mode identifying method of identifying a mode to which inputted code data belongs is provided. An inherent code existing in each mode so as to have a probability-manner relation and the probability-manner relation are stored so as to correspond to each other. A code which coincides with the inherent code stored is extracted from the code data and the number of coincidence times of every code is counted. The mode to which the code data belongs is identified on the basis of the number of coincidence times obtained by the counting step and the probability-manner relation stored by applying a multi-value logical relation or a fuzzy logical relation or both of a fuzzy rule and a fuzzy inference to the number of coincidence times obtained and probability-manner relation stored.