Updating markov models based on speech input and additional information for automated telephone directory assistance
First Claim
1. A method for performing desired actions in response to speech signals, comprising:
- storing representations of speech signals;
calculating, according to a speech recognition algorithm responsive to the representations of speech signals, measures of probability that the speech signals correspond to each of a plurality of actions in an action vocabulary;
selecting actions in response to the calculated measures of probability and automatically performing said actions from the action vocabulary;
acquiring further data indicative of desired actions;
calculating, according to a speech recognition algorithm responsive to both the representations of the speech signals and the further data, further measures of probability that the speech signals correspond to each of a plurality of actions;
labelling the stored representations of speech signals in response to the further calculated measures of probability; and
calculating speech recognition algorithm model parameters in response to the labelled stored representations of speech signals.
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Abstract
In methods and apparatus for at least partially automating a telephone directory assistance function, directory assistance callers are prompted to speak locality or called entity names associated with desired directory listings. A speech recognition algorithm is applied to speech signals received in response to prompting to determine spoken locality or called entity names. Desired telephone numbers are released to callers, and released telephone numbers are used to confirm or correct at least some of the recognized locality or called entity names. Speech signal representations labelled with the confirmed or corrected names are used as labelled speech tokens to refine prior training of the speech recognition algorithm. The training refinement automatically adjusts for deficiencies in prior training of the speech recognition algorithm and to long term changes in the speech patterns of directory assistance callers served by a particular directory assistance installation. The methods can be generalized to other speech recognition applications.
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Citations
11 Claims
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1. A method for performing desired actions in response to speech signals, comprising:
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storing representations of speech signals; calculating, according to a speech recognition algorithm responsive to the representations of speech signals, measures of probability that the speech signals correspond to each of a plurality of actions in an action vocabulary; selecting actions in response to the calculated measures of probability and automatically performing said actions from the action vocabulary; acquiring further data indicative of desired actions; calculating, according to a speech recognition algorithm responsive to both the representations of the speech signals and the further data, further measures of probability that the speech signals correspond to each of a plurality of actions; labelling the stored representations of speech signals in response to the further calculated measures of probability; and calculating speech recognition algorithm model parameters in response to the labelled stored representations of speech signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification