Patent ID: 6230128
Filing Date: 2001-05-08
Classification: G10L

Abstract:
A speech recognition system comprising:means for deriving a recognition feature vector from an input speech signal for each of predetermined time frames;means for modelling predetermined possible input speech comprising a plurality of vocabulary nodes each of which has an associated word representation model and links between said vocabulary nodes;processing means for comparing the recognition feature vectors with the modelled input speech and for generating a path link for each node and time frame, said path links indicating the most likely prior sequence of vocabulary nodes for each vocabulary node and time frame, each path link comprising a field for storing an accumulated recognition score and a field for storing a reference to the most likely previous path link in the sequence; andmeans for indicating recognition of the input speech signal in dependence upon the comparison;the processing means being capable of processing more than one path link for at least one vocabulary node, other than the final node, in a single time frame.