LEARNING APPARATUS, LEARNING METHOD, RECOGNITION APPARATUS, RECOGNITION METHOD, AND RECORDING MEDIUM

With respect to each of codes corresponding to code vectors in a code book stored in a code book storage section, an expectation degree storage section stores an expectation degree at which observation is expected when an integrated parameter with respect to a word as a recognition target is inputted. A vector quantization section vector-quantizes the integrated parameter and outputs a series of codes of a code vector which has a shortest distance to the integrated parameter. Further, a chi-square test section makes a chi-square test with use of the series of codes outputted from the vector quantization section and an expectation degree of each code stored in the expectation degree storage section, thereby to obtain properness as to whether or not the integrated parameter corresponds to a recognition target. Further, recognition is performed, based on the chi-square test result. As a result of this, recognition can be performed without considering time components which a signal has.