Acoustic model creation manner for speech recognition, the acoustic model creation device for speech recognition, the record media which records the acoustic model creation program and this program for speech recognition

摘要

P To create an acoustic model having a high recognition rate irrespective of a quantity of learning data. PSOLUTION: The method for creating an acoustic model for speech recognition is established by providing: the acoustic model with a primary acoustic model storage part in which a primary acoustic model is stored; and a learning data storage part in which learning data are stored. The method obtains a movement vector of a Gauss distribution average vector of the acoustic model from the learning data acquired from the primary acoustic model and the learning data storage part and transforms the primary acoustic model into an adaptive acoustic model adaptive to the above learning data by using this movement vector. The movement vector is decomposed into a direction vector and a scaling factor, the direction vector is obtained by learning in parameter estimation of a coarse class and the above scaling factor is obtained by learning in parameter estimation of a fine class. PCOPYRIGHT: (C)2006 and JPO& NCIPI