Method of training a speaker-dependent speech recognizer with automated supervision of training sufficiency

摘要

To train a speech recognizer, a new voice message (one or a few isolated words), after being spoken by a user, is converted into a token. The token is then compared with a plurality of templates stored in the recognizer and a recognition score is obtained each time. The templates previously stored in the recognizer include templates for previously trained voice messages and one or more previously formed templates of the new voice message. Three tests are applied to the recognition scores to determine if the token and one of the previously formed templates of the new voice message can become paradigm templates, if the new voice message is too close in pronunciation to a voice message the recognizer has been previously trained to recognize, or if the user should repeat the new voice message to form another token. This training procedure provides a certain level of automatic control over the training process of a speaker dependent speech recognizer in an otherwise unsupervised environment. It prevents a user from adding a new voice message which is similar to a voice message the recognizer has previously been trained to recognize and insures a consistent pronunciation for all templates corresponding to the same voice message.