SPEECH WAVEFORM EXPANDING DEVICE, WAVEFORM EXPANDING METHOD, SPEECH WAVEFORM REDUCING DEVICE, WAVEFORM REDUCING METHOD, PROGRAM, AND SPEECH PROCESSOR

摘要

PROBLEM TO BE SOLVED: To realize speech reduction and expansion with arbitrary magnification while reducing deterioration of a speech waveform.;SOLUTION: A speech processor 100 divides an inputted speech signal into pitch waveforms. Similarities of each pitch waveform with pitch waveforms right before and after it are calculated and pitch waveforms are generated together with pitch waveforms with higher similarities. The generated pitch waveforms are inserted between the source pitch waveforms for the generation when expanded or replaced with the source pitch waveforms for the generation when reduced. The pitch waveforms are processed in the decreasing order of similarities within processing units.;COPYRIGHT: (C)2006,JPO&NCIPI