Patent ID: 7698136
Filing Date: 2010-04-13
Classification: G10L

Abstract:
1. A computer implemented method, comprising: receiving a speech signal; extracting a sequence of acoustic feature vectors from the speech signal; identifying a set of one or more words from the speech signal; identifying a set of one or more phrases from the speech signal, the set of one or more phrases including a sequence of words, wherein the set of one or more phrases comprises key phrases and filler phrases; assigning a first probability to a phrase of the one or more phrases, the first probability representing a likelihood that the sequence of acoustic feature vectors was produced by the phrase; assigning a second probability to the phrase of the one or more phrases, the second probability representing a likelihood that the phrase would be received; assigning a score to the phrase of the one or more phrases, the score calculated using the first probability and the second probability; and evaluating the speech signal against the set of phrases using the score.