... parameters and their regression coefficients as speech features, triphone HMMs as acoustic models, vocabularies of several thousand or several ten thousand entries, and stochastic language models ... 20 AUTOMATIC SPEECH RECOGNITION AND ITS APPLICATION TO INFORMATION EXTRACTION Sadaoki Furui Department of Computer Science Tokyo institute of Technology 2-12-1, Ookayama, Meguro-ku, Tokyo, ... value has lead to rapid technology transfer of speech recognition into other research areas and applications. Since the variations in speaking style and accent as well as in channel and environment...