Patent ID: 7333928
Filing Date: 2008-02-19
Classification: G10L

Abstract:
1. An error-tolerant language understanding method comprising the following steps: (a) Inputting at least one word sequence and its corresponding acoustic score; (b) Parsing said word sequence to obtain a corresponding concept sequence set; (c) Attach at least one confidence measure sequence to each concept sequence in the said concept sequence set and compare the concept sequences together with their associated confidence measure sequences against at least one exemplary concept sequence to obtain at least one edit operation sequence; (d) According to said acoustic score of said word sequence, the corresponding grammar score of a concept sequence in said concept sequence set, the corresponding example score of said exemplary concept sequence and the corresponding edit operation score of said edit operation sequence to determine the most possible concept sequence; and (e) Translating said most possible concept sequence into a semantic frame, wherein the step (d) further comprising: Using a probabilistic scoring function to determine said the most possible concept sequence, and said probabilistic scoring function is formulated as follows: wherein wherein U represents a utterance signal, W represents said possible word sequence in the sentence list that outputs from the speech recognition module, F represents a possible concept parses forest of W T is a concept parse tree of said concept parse forest F, A→α is a concept grammar that generates said T, A is a left-hand-side symbol and α is right-hand-side symbols, m is the number of concept in exemplary concept sequence K, k e is an edit operation in edit operation sequence E, said utterance signal U is processed with X number of confidence measure modules and X number of confidence measure sequences are generated, one of said confidence measure sequences M