Patent ID: 7013277
Filing Date: 2006-03-14
Classification: G10L

Abstract:
1. A speech recognition apparatus for recognizing an input speech as a recognized speech, comprising: a feature extracting means for extracting feature amounts from the input speech; a preliminary word-selecting means for selecting words on the basis of the feature amounts by referring to a first database; a matching means for calculating acoustic and linguistic scores for the selected words and forming a word string serving as a candidate for the recognized speech by referring to a second database; wherein the second database incorporates more precise acoustic model, phoneme information, and grammar rules than the first database; a control means for generating word-connection-information between words in the word string; the word-connection-information including acoustic and linguistic scores for each word in the word string; a re-evaluation means for re-evaluating the word string and correcting the word-connection-information by referring to a third database; wherein the third database incorporates more precise acoustic models, phoneme information, and grammar rules than the second database; and the control means determining the recognized speech by correcting the word string on the basis of the corrected word-connection-information.