METHOD FOR CONVERTING TIME SHAFT OF VOICE SIGNAL

摘要

PURPOSE: A method for converting time shaft of a voice signal is provided to apply three level center clipping and a level crossing method to a synthesis voice signal and an analysis voice signal and then perform synchronization, thereby capable of reducing an amount of calculation by canceling a normalization portion and reducing a search period. CONSTITUTION: An analysis voice frame is initialized as a synthesis voice frame(S1). Thereafter, when all voice data are inputted(S2), a time shaft conversion method is finished. When all voice data are not inputted, a clipping level of the synthesis voice frame and the analysis voice frame is determined(S3). The synthesis voice frame and the analysis voice frame are divided into three levels by using the determined clipping level(S4). A level crossing point of the synthesis voice frame and the analysis voice frame is searched(S5). A synchronization point between the synthesis voice frame and the analysis voice frame is searched by using the analysis voice signal, the synthesis voice signal and the level crossing point processed through a three level center clipping process(S6). On the basis of the searched synchronization point, the synthesis voice signal and the analysis voice signal are rearranged. Two signals are superposed and added(S7).