Method and system for time scale modification utilizing feature vectors about zero crossing points

A system for generating a time scale modification of a signal comprising:

• a zero crossing module for determining zero crossing points in the signal;
• a feature vector module coupled to said zero crossing module for determining feature vectors in neighborhood of said zero crossing points based on absolute magnitude and slope of sample points before and after zero crossing point;
• said feature vector having j dimensions;
• a distance metric module coupled to said feature vector module for determining distance metrics based on accumulation of differences for each of the j dimensions, said distance metrics indicating closeness of local characteristics between two of said zero crossing points;
• means for finding minimum measure of said accumulation of differences for each of the j dimensions;
• and
• an alignment module coupled to said distance metric module for aligning said signal using said zero crossing points and said distance metrics based on said minimum measure of said accumulation of differences for each of the j dimensions to generate the time scale modification of the signal.