15th Annual Conference of the International Speech Communication Association

September 14-18, 2014

Excitation Source Analysis for High-Quality Speech Manipulation Systems Based on an Interference-Free Representation of Group Delay with Minimum Phase Response Compensation

Hideki Kawahara (1), Masanori Morise (2), Tomoki Toda (3), Hideki Banno (4), Ryuichi Nisimura (1), Toshio Irino (1)

(1) Wakayama University, Japan
(2) University of Yamanashi, Japan
(3) NAIST, Japan
(4) Meijo University, Japan

A group delay-based excitation source analysis and design method is introduced for extension of TANDEM-STRAIGHT, a speech analysis, modification and synthesis system. This introduction makes all components of the system be based on interference-free representations. They are power spectrum, instantaneous frequency and group delay representations. This unification has potential to solve the major weak point of VOCODER architecture for high-quality speech manipulation applications.

Full Paper

Bibliographic reference.  Kawahara, Hideki / Morise, Masanori / Toda, Tomoki / Banno, Hideki / Nisimura, Ryuichi / Irino, Toshio (2014): "Excitation source analysis for high-quality speech manipulation systems based on an interference-free representation of group delay with minimum phase response compensation", In INTERSPEECH-2014, 2243-2247.