SPEECH RECOGNITION DEVICE AND STANDARD PATTERN LEARNING METHOD

摘要

PROBLEM TO BE SOLVED: To realize speech recognition with high accuracy by using a standard pattern capable of reliably accommodating for the variation of voice patterns. ;SOLUTION: In standard learning processing, the learning of a standard pattern including the standard pattern corresponding to the knowledge of voice pattern variation is performed by using the learning method for conventional standard patterns. A distribution spread of each standard pattern obtained is measured. If the measured distribution spread is larger than the distribution spread of a standard pattern pluralized based on the variation knowledge, the standard pattern is pluralized and controlled so that the distribution spread of individual standard pattern does not become larger than the distribution spread of the pluralized standard pattern based on the knowledge and becomes the standard pattern balanced as a whole. Since the balanced standard pattern which also complies with universal knowledge on the variation of the voice pattern can be formed, speech recognition with high accuracy is made possible.;COPYRIGHT: (C)1997,JPO