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System and method to disambiguate and clarify user intention in a spoken dialog system

  • US 20050165607A1
  • Filed: 01/22/2004
  • Published: 07/28/2005
  • Est. Priority Date: 01/22/2004
  • Status: Abandoned Application
First Claim
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1. A disambiguation method in a spoken dialog service that identifies a user need, the disambiguation method being associated with a rooted tree, the method comprising:

  • (a) based on a received user utterance in response to a prompt, establishing at least one lit node and assigning a current focus node;

    (b) if there is a single direct descendent of the focus node that is lit;

    (1) assigning the lit direct descendent of the current focus node as a new focus node;

    (2) if the new focus node is a leaf node, identifying the user need; and

    (3) if the new focus node is not a leaf node, prompting the user to disambiguate between descendent nodes of the new focus node and returning to step (a);

    (c) if there is not a single direct descendent of the current focus node that is lit;

    (1) assigning a lowest common ancestor node of all lit nodes as a new focus node;

    (2) prompting the user for input to disambiguate between descendent nodes of the new focus node; and

    (3) returning to step (a).

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