Confidence measure generation for speech related searching
First Claim
1. A method of conducting a dialog with a user of a voice search system that includes a speech recognizer, a search component and a dialog manager, the method comprising:
- generating a dialog feature, with the dialog manager, indicative of a performance of the voice search system in responding to the user;
recognizing a user speech input with the speech recognizer to generate a query and a speech recognition feature indicative of a measure of speech recognition accuracy;
searching a data store, with the search component, for search results based on the query, and generating a search feature indicative of a measure of search accuracy;
generating a voice search confidence measure based on the dialog feature, the speech recognition feature, and the search feature; and
conducting the dialog according to a dialog strategy chosen based, at least in part, on the voice search confidence measure.
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Abstract
A voice search system has a speech recognizer, a search component, and a dialog manager. A confidence measure generator receives speech recognition features from the speech recognizer, search features from the search component, and dialog features from the dialog manager, and calculates an overall confidence measure for voice search results based upon the features received. The invention can be extended to include the generation of additional features, based on those received from the individual components of the voice search system.
46 Citations
20 Claims
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1. A method of conducting a dialog with a user of a voice search system that includes a speech recognizer, a search component and a dialog manager, the method comprising:
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generating a dialog feature, with the dialog manager, indicative of a performance of the voice search system in responding to the user; recognizing a user speech input with the speech recognizer to generate a query and a speech recognition feature indicative of a measure of speech recognition accuracy; searching a data store, with the search component, for search results based on the query, and generating a search feature indicative of a measure of search accuracy; generating a voice search confidence measure based on the dialog feature, the speech recognition feature, and the search feature; and conducting the dialog according to a dialog strategy chosen based, at least in part, on the voice search confidence measure. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of generating a confidence measure generator for use in a voice search system, the voice search system including voice search components comprising a speech recognition system, a dialog manager and a search system, the method comprising:
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selecting voice search features, from a plurality of the voice search components, to be considered by the confidence measure generator in generating a voice search confidence measure; and training a model to generate the voice search confidence measure based on selected voice search features. - View Dependent Claims (9, 11, 12, 13, 14, 15)
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10. The method of claim 10 wherein selecting voice search features further comprises:
repeating the steps of selecting a set of features, calculating an error rate for the model based on the set of features, identifying insignificant features in the set of features, and removing the insignificant features from the initial set of features to obtain a set of remaining features, until a desired set of remaining features is obtained.
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16. A voice search system, comprising:
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a speech recognition system configured to receive a spoken input and to generate a query from the spoken input; a search system configured to receive the query and search a data store for a search result based on the query; a dialog component configured to conduct a user dialog; and a confidence measure generator configured to receive features from a plurality of the speech recognizer, the search component and the dialog component and generate a voice search confidence measure corresponding to the search result, the dialog component being configured to conduct the user dialog according to a strategy based on the voice search confidence measure. - View Dependent Claims (17, 18, 19, 20)
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Specification