Patent ID: 6999931

Claim:
A spoken dialog system using a best-fit language model, comprising: a dialog manager, coupled to a language model selector, that provides to the language model selector a current dialog state; the language model selector, coupled to a plurality of dialog-state dependent language models, that selects one of the plurality of dialog-state dependent language models; the plurality of dialog-state dependent language models that are interpolated from a general-task language model; a large vocabulary continuous speech recognizer, coupled to the dialog manager and the language model selector, that receives input speech and generates a first hypothesis result for the input speech with a likelihood score, based on the selected dialog-state dependent language model; the general-task language model, coupled to the large vocabulary continuous speech recognizer, that enables the large vocabulary continuous speech recognizer to generate a second hypothesis with a second likelihood score; and a plurality of dialog strategies based on the language model system, coupled to the dialog manager.