Voice Color Converter using Transforming Vocal Tract Characteristic and Method

摘要

PURPOSE: A timbre transform device using conversion of vocal tract characteristics and a method thereof are provided to improve the stability of voice of which timbre is converted finally to its original timbre level. CONSTITUTION: A timbre transform device(200) using conversion of vocal tract characteristics includes an SSF(Spectrum Scaling Factor) extracting unit, an NUSR(Non-Uniform Spectrum Rescaling) unit, and an IFFT(Inverse Fast Fourier Transform) unit. The SSF extracting unit extracts LP-based formant information on voiced and unvoiced formants of a target speaker and a standard speaker per phone-like unit, and represents differences between respective formants. The NUSR unit carries out NUSR for real and imaginary number parts of FFT-based spectrums per pitch section of the standard speaker, thereby transforming tract spectrum of the standard speaker near to tract spectrum of the target speaker by using the SSF. The IFFT unit recovers the NUSR-carried spectrum to voice signals of temporal area on the tract spectrum of the standard speaker by carrying out IFFT.