Patent ID: 6560575
Filing Date: 2003-05-06
Classification: G10L

Abstract:
A consistency checking apparatus, comprising:means for receiving a first sequence of frames representative of a first speech signal and a second sequence of frames representative of a second speech signal; means for matching the frames representative of the first speech signal with the frames representative of the second speech signal to determine a sequence of aligned pairs of frames, with each aligned pair of frames including a frame from said first sequence and a frame from said second sequence, and to determine a matching score associated with the sequence of aligned pairs of frames indicative of the similarity between the first and second sequences of frames; means for calculating an average frame score by dividing said matching score by the number of aligned pairs of frames in said sequence of aligned pairs of frames; means for processing sub-sequences of said sequence of aligned pairs of frames to determine a corresponding matching score for each sub-sequence indicative of the similarity between the aligned pairs of frames within each sub-sequence; first comparing means for comparing the matching scores for the sub-sequences to identify a worst matching portion of the sequence of aligned pairs of frames; memory means for storing data defining a model of consistent training speech signals; second comparing means for comparing said average frame score and a matching score of said worst matching portion with said stored model data; and means for determining if said first and second input speech signals are consistent with each other from a comparison result output by said second comparing means.