SYSTEM AND METHOD OF RECOGNIZING AN ACOUSTIC ENVIRONMENT TO ADAPT A SET OF BASE RECOGNITION MODELS TO THE CURRENT ACOUSTIC ENVIRONMENT FOR SUBSEQUENT SPEECH RECOGNITION

A speech recognition system which effectively recognizes unknown speech from multiple acoustic environments includes a set of secondary models, each associated with one or more particular acoustic environments, integrated with a base set of recognition models. The speech recognition system is trained by making a set of secondary models in a first stage of training, and integrating the set of secondary models with a base set of recognition models in a second stage of training.