Patent ID: 6799162
Filing Date: 2004-09-28
Classification: G10L

Abstract:
Method to perform an unsupervised and/or on-line adaptation of an automatic speech recognition system, comprising:receiving an utterance or parts thereof; determining a recognition result of said received utterance or parts thereof; determining a grade of the reliability of the recognition result; determining a grade of adaptation of the system with the help of the received utterance or parts thereof based on the grade of the reliability of the recognition result; and adapting the automatic speech recognition system according to the grade of adaptation; wherein the grade of adaptation indicates a weight to be applied in adapting the system such that adapting the automatic speech recognition system includes applying an amount of adaptation according to the grade of adaptation, wherein said received utterance or a part of said received utterance is used for adaptation when the grade of the reliability of the recognition is above a threshold and is discarded when it is below said threshold, and wherein said threshold is dynamically changeable.