Nearly defect-free F0 trajectory extraction for expressive speech modifications based on STRAIGHT. - Hideki Kawahara; Alain de Cheveigné; Hideki Banno; Toru Takahashi 004; Toshio Irino (INTERSPEECH, 2005)

Voice and emotional expression transformation based on statistics of vowel parameters in an emotional speech database. - Toru Takahashi 004; Takeshi Fujii; Masashi Nishi; Hideki Banno; Toshio Irino; Hideki Kawahara (INTERSPEECH, 2005)

Speech style conversion based on the statistics of vowel spectrograms and nonlinear frequency mapping. - Toru Takahashi 004; Hideki Banno; Toshio Irino; Hideki Kawahara (EUSIPCO, 2006)

Automatic assignment of anchoring points on vowel templates for defining correspondence between time-frequency representations of speech samples. - Toru Takahashi 004; Masashi Nishi; Toshio Irino; Hideki Kawahara (INTERSPEECH, 2006)

Group delay for acoustic event representation and its application for speech aperiodicity analysis. - Hideki Kawahara; Masanori Morise; Toru Takahashi 004; Toshio Irino; Hideki Banno; Osamu Fujimura (EUSIPCO, 2007)

Tandem-STRAIGHT: A temporally stable power spectral representation for periodic signals and applications to interference-free spectrum, F0, and aperiodicity estimation. - Hideki Kawahara; Masanori Morise; Toru Takahashi 004; Ryuichi Nisimura; Toshio Irino; Hideki Banno (ICASSP, 2008)

Spectral envelope recovery beyond the nyquist limit for high-quality manipulation of speech sounds. - Hideki Kawahara; Masanori Morise; Hideki Banno; Toru Takahashi 004; Ryuichi Nisimura; Toshio Irino (INTERSPEECH, 2008)

Vowel-based frequency alignment function design and recognition-based time alignment for automatic speech morphing. - Masato Onishi; Toru Takahashi 004; Toshio Irino; Hideki Kawahara (SLT, 2008)

Temporally variable multi-aspect auditory morphing enabling extrapolation without objective and perceptual breakdown. - Hideki Kawahara; Ryuichi Nisimura; Toshio Irino; Masanori Morise; Toru Takahashi 004; Hideki Banno (ICASSP, 2009)

Observation of empirical cumulative distribution of vowel spectral distances and its application to vowel based voice conversion. - Hideki Kawahara; Masanori Morise; Toru Takahashi 004; Hideki Banno; Ryuichi Nisimura; Toshio Irino (INTERSPEECH, 2009)

High-quality and light-weight voice transformation enabling extrapolation without perceptual and objective breakdown. - Hideki Kawahara; Ryuichi Nisimura; Toshio Irino; Masanori Morise; Toru Takahashi 004; Hideki Banno (ICASSP, 2010)

Simplification and extension of non-periodic excitation source representations for high-quality speech manipulation systems. - Hideki Kawahara; Masanori Morise; Toru Takahashi 004; Hideki Banno; Ryuichi Nisimura; Toshio Irino (INTERSPEECH, 2010)