The paper presents the possibilities of changing human voice by modifying instantaneous complex frequency (ICF) of the speech signal. The proposed method provides a flexible way of altering voice without the necessity of finding fundamental frequency and formants’ positions or detecting voiced and unvoiced fragments of speech. The algorithm is simple and fast. Apart from ICF it uses signal factorization into two factors: one fully characterized by its envelope and the other with positive instantaneous frequency. ICFs of the factors are modified individually for different sound effects.

Author: Kaniewska, Magdalena
Affiliation: Gdansk University of Technology, Gdansk, Poland
AES Convention: 128 (May 2010) Paper Number: 8136
Publication Date: May 1, 2010
Subject: Audio Processing—Music and Speech Signal Processing

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