Patent ID: 6801898
Filing Date: 2004-10-05
Classification: G10L

Abstract:
In a time-scale modification method in which wave segments each having a prescribed length are sequentially cut from original digital signals and are then spliced together by way of cross-fading so that output signals are produced realizing time-scale modification in accordance with a designated time-scale modification factor, said time-scale modification method comprising the steps of:determining a cutting start position used for cutting a next wave segment following a present wave segment within a period of time between a search start time and a search end time, which are determined in advance in accordance with the designated time-scale modification factor and where the period of time is less than the predescribed length of each of the wave segments, in such a way that the cutting start position is placed to provide a best similarity between the wave segments having prescribed portions which are connected with each other by way of cross-fading-in response to a cross-fade duration; and using the cutting start position to cut the next wave segment being spliced with the present wave segment by way of the cross-fading in such a manner to maintain the designated time-scale modification factor.