Patent ID: 6278972
Filing Date: 2001-08-21
Classification: G10L

Abstract:
In a speech recognition system, a method for forming a segmented speech signal from an input speech signal having a plurality of frames, comprising the steps of:converting said input speech signal from a time domain signal to a frequency domain signal having a plurality of speech frames, wherein each speech frame in said frequency domain signal is represented by at least one spectral value associated with said speech frame;assigning an initial cluster boundary between each pair of adjacent frames in said frequency domain signal to define a cluster for each said speech frame;assigning a variance value to each said cluster based on said at least one spectral value associated with the frames in each cluster;forming a merged cluster by canceling a cluster boundary between a pair of adjacent clusters based on said variance values;repeating the steps of assigning a variance value and forming a merged cluster in order to form a predefined number of merged clusters; andforming said segmented speech signal in accordance with said predefined number of merged clusters.