Speech recognition method and system in which said method is implemented
First Claim
1. A method of recognizing spoken words, utilizing a dictionary containing words and associated reference vectors, the method comprising:
- breaking down a spoken word to be recognized into input vectors,evaluating ambient noise measured when the speaker is not speaking,choosing a recognized word from the dictionary having associated reference vectors which are separated from the input vectors by a smallest distance, andvalidating the recognized word by a comparison of said smallest distance with a threshold value,wherein the threshold value is derived as a function of the result of the evaluation of ambient noise.
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Abstract
In a speech recognition method and system a spoken word to be recognized is broken down into input vectors (K2a), ambient noise is evaluated (K1), a recognized word is chosen from a dictionary having associated reference vectors which are separated from the input vectors by a shortest distance (K3), and the recognized word is validated by a comparison of this distance with a threshold value which is derived as a function of the result of the evaluation of ambient noise. The ambient noise evaluation may be carried out at an instant when the speaker is silent, i.e. either before or after the speaker speaks the word to be recognized.
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Citations
9 Claims
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1. A method of recognizing spoken words, utilizing a dictionary containing words and associated reference vectors, the method comprising:
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breaking down a spoken word to be recognized into input vectors, evaluating ambient noise measured when the speaker is not speaking, choosing a recognized word from the dictionary having associated reference vectors which are separated from the input vectors by a smallest distance, and validating the recognized word by a comparison of said smallest distance with a threshold value, wherein the threshold value is derived as a function of the result of the evaluation of ambient noise. - View Dependent Claims (2, 3, 4, 5)
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6. A speech recognition device comprising a user interface including a microphone for capturing words spoken by a user to be recognized, and a microprocessor assembly programmed for carrying out the following acts utilizing a stored dictionary containing words and associated reference vectors:
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breaking down a spoken word to be recognized into input vectors, evaluating ambient noise measured when the user is not speaking, choosing a recognized word from the dictionary having associated reference vectors which are separated from the input vectors by a smallest distance, and validating the recognized word by a comparison of said smallest distance with a threshold value, wherein the threshold value is derived as a function of the result of the evaluation of ambient noise. - View Dependent Claims (7, 8, 9)
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Specification