METHOD AND SYSTEM FOR CONSIDERING INFORMATION ABOUT AN EXPECTED RESPONSE WHEN PERFORMING SPEECH RECOGNITION
First Claim
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1. A method for recognizing speech, the method comprising the steps of:
- analyzing speech input to generate a hypothesis including multiple elements;
generating respective confidence factors for the multiple elements of the speech input;
comparing a confidence factor for at least one of the elements to a threshold for accepting the element as properly recognized; and
if the element is not accepted in the comparison, comparing at least a portion of the hypothesis containing the unaccepted element to at least a portion of an expected response;
if the comparison of the portion of the hypothesis containing the unaccepted element with the portion of the expected response is favorable, storing the unaccepted element for subsequent analysis and proceeding to further analyze another element of the hypothesis.
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Abstract
A speech recognition system receives and analyzes speech input from a user in order to recognize and accept a response from the user. Under certain conditions, information about the response expected from the user may be available. In these situations, the available information about the expected response is used to modify the behavior of the speech recognition system by taking this information into account. The modified behavior of the speech recognition system comprises adjusting the rejection threshold when speech input matches the predetermined expected response.
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18 Claims
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1. A method for recognizing speech, the method comprising the steps of:
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analyzing speech input to generate a hypothesis including multiple elements; generating respective confidence factors for the multiple elements of the speech input; comparing a confidence factor for at least one of the elements to a threshold for accepting the element as properly recognized; and if the element is not accepted in the comparison, comparing at least a portion of the hypothesis containing the unaccepted element to at least a portion of an expected response; if the comparison of the portion of the hypothesis containing the unaccepted element with the portion of the expected response is favorable, storing the unaccepted element for subsequent analysis and proceeding to further analyze another element of the hypothesis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. The method of claim 11 further comprising generating the hypothesis in an element-by-element fashion, and the subsequent analysis for a stored element being performed after generating the next element in the hypothesis.
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12. A system for recognizing speech, comprising:
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a speech recognizer configured to analyze speech input and generate a hypothesis of multiple elements and respective confidence factors for the multiple elements; an acceptance algorithm operable for comparing the confidence factor of at least one of element to an acceptance threshold for accepting the element; an adjustment component operable for comparing at least a portion of the hypothesis containing an element that is not accepted to at least a portion of an expected response; if the comparison of the portion of the hypothesis containing the unaccepted element with the portion of the expected response is favorable, the system operable for storing the unaccepted element for subsequent analysis and proceeding to further analyze another element of the hypothesis. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A method for recognizing speech, the method comprising the steps of:
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analyzing speech input to generate a hypothesis of multiple elements and respective confidence factors for the multiple elements; comparing each said confidence factor to a threshold for accepting the element; and comparing at least a portion of the hypothesis to at least a portion of an expected response; if the comparison is favorable, adjusting a threshold for one or more of the elements in order to affect the acceptance of the one or more elements.
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Specification