초록 ▼

A method and system for implementing time scale modification wherein the method includes a Zero Crossing Module (22) for determining zero crossing points in the signal, a Feature Vector Module (24) for generating feature vectors describing the zero crossing points, a Distance Metric Module (26) for

A method and system for implementing time scale modification wherein the method includes a Zero Crossing Module (22) for determining zero crossing points in the signal, a Feature Vector Module (24) for generating feature vectors describing the zero crossing points, a Distance Metric Module (26) for generating distance metrics describing local characteristics at the zero crossing points, an Alignment Module (28) for using the feature vectors and distance metrics for aligning and synchronizing the signal in accordance with local similarities and similarity over a selected time interval to generate a time scale modified signal. The present invention also includes a Cross Fade Module (20) for smoothing transitions between successive frames of the resulting time scale modified signal.

대표청구항 ▼

[ What is claimed is:] [1.] A method of generating a time scale modification of a signal comprising the steps of:determining zero crossing points in the signal using a zero crossing module;determining feature vectors in neighborhood of said zero crossing points based on absolute magnitude and slope

[ What is claimed is:] [1.] A method of generating a time scale modification of a signal comprising the steps of:determining zero crossing points in the signal using a zero crossing module;determining feature vectors in neighborhood of said zero crossing points based on absolute magnitude and slope of sample points before and after zero crossing points using a feature vector module wherein each feature vector has j dimensions;determining distance metrics associated with said zero crossing points using said feature vectors bases on accumulation of differences for each of the j dimensions, each of said distance metrics to measure closeness of local characteristics between two of said zero crossing points, using a distance metric module; finding minimum measure of said accumulation of differences for each of the dimensions; andaligning the signal along similar segments using said feature vectors and said distance metrics based on said minimum measure of said accumulation of differences for each of the j dimensions to achieve the time scale modification of the signal using said alignment module.