International Conferences

  1. Shinji Takaki, Kei Sawada, Kei Hashimoto, Keiichiro Oura, Keiichi Tokuda, ``Overview of NIT HMM-based speech synthesis system for Blizzard Challenge 2012,'' Blizzard Challenge 2012 Workshop, Portland, USA, September 14, 2012 (web proceedings).
  2. Takafumi Hattori, Kei Hashimoto, Yoshihiko Nankaku, Keiichi Tokuda, ``A Bayesian approach to speaker recognition based on GMMs using multiple model structures,'' Interspeech 2012, Portland, USA, September 9-13, 2012.
  3. Viviane de Franca Oliveira, Sayaka Shiota, Yoshihiko Nankaku, Keiichi Tokuda, ``Cross-lingual speaker adaptation for HMM-based speech synthesis based on perceptual characteristics and spaker interpolation,'' Interspeech 2012, Portland, USA, September 9-13, 2012.
  4. Kei Sawada, Akira Tamamori, Kei Hashimoto, Yoshihiko Nankaku, Keiichi Tokuda, ``Face recognition based on separable lattice 2-D HMMs using variational Bayesian method,'' 2012 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2012), pp.2205-2208, Kyoto, Japan, March 25-30, 2012.
  5. Keisuke Kumaki, Yoshihiko Nankaku, Keiichi Tokuda, ``Face recognition based on separable lattice 2-D HMMs using variational Bayesian method,'' 2012 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2012), pp.2209-2212, Kyoto, Japan, March 25-30, 2012.
  6. Sayaka Shiota, Kei Hashimoto, Yoshihiko Nankaku, Keiichi Tokuda, ``A model structure integration based on a Byesian framework for speech recognition,'' 2012 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2012), pp.4813-4816, Kyoto, Japan, March 25-30, 2012.
  7. Keiichiro Oura, Ayami Mase, Yoshihiko Nankaku, Keiichi Tokuda, ``Pitch adaptive training for HMM-based singing voice synthesis,'' 2012 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2012), pp.5377-5380, Kyoto, Japan, March 25-30, 2012.
  8. Kei Hashimoto, Shinji Takaki, Keiichiro Oura, Keiichi Tokuda, ``Overview of NIT HMM-based speech synthesis system for Blizzard Challenge 2011,'' Blizzard Challenge 2011 Workshop, Turin, Italy, September 2, 2011 (web proceedings).
  9. Kei Hashimoto, Yoshihiko Nankaku, Keiichi Tokuda, ``Multi-speaker modeling with shared prior distributions and model structures for Bayesian speech synthesis,'' Interspeech 2011, pp.113-116, Florence, Italy, August 28-31, 2011.
  10. Minoru Tsuzaki, Keiichi Tokuda, Hisashi Kawai, Jinfu Ni, ``Estimation of perceptual spaces for speaker identities based on the cross-lingual discrimination task,'' Interspeech 2011, pp.157-160, Florence, Italy, August 28-31, 2011.
  11. Lei Li, Yoshihiko Nankaku, Keiichi Tokuda, ``A Bayesian approach to voice conversion based on GMMs using multiple model structures,'' Interspeech 2011, pp.661-664, Florence, Italy, August 28-31, 2011.
  12. Ulpu Remes, Yoshihiko Nankaku, Keiichi Tokuda, ``GMM-based missing-feature reconstruction on multi-frame windows,'' Interspeech 2011, pp.1665-1668, Florence, Italy, August 28-31, 2011.
  13. Ling-Hui Chen, Yoshihiko Nankaku, Heiga Zen, Keiichi Tokuda, Zhen-Hua Ling, Li-Rong Dai, ``Estimation of window coefficients for dynamic feature extraction for HMM-based speech synthesis,'' Interspeech 2011, pp.1801-1804, Florence, Italy, August 28-31, 2011.
  14. Tsuneo Kato, Makoto Yamada, Nobuyuki Nishizawa, Keiichiro Oura, Keiichi Tokuda, ``Large-scale subjective evaluations of speech rate control methods for HMM-based speech synthesizers,'' Interspeech 2011, pp.1845-1848, Florence, Italy, August 28-31, 2011.
  15. Naoaki Ito, Yoshihiko Nankaku, Akinobu Lee, Keiichi Tokuda, ``Evaluation of tree-trellis based decoding in over-million LVCSR,'' Interspeech 2011, pp.1937-1940, Florence, Italy, August 28-31, 2011.
  16. Kei Hashimoto, Junichi Yamagishi, William Byrne, Simon King, and Keiichi Tokuda, ``An analysis of machine translation and speech synthesis in speech-to-speech translation system,'' 2011 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2011), pp.5108-5111, Prague, Czech Republic, May 22-27, 2011.
  17. Shinji Takaki, Keiichiro Oura, Yoshihiko Nankaku, and Keiichi Tokuda, ``An Optimization Algorithm of Independent Mean and Variance Parameter Tying Structures for HMM-based speech synthesis,'' 2011 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2011), pp.5108-5111, Prague, Czech Republic, May 22-27, 2011.
  18. Shifeng Pan, Yoshihiko Nankaku, Keiichi Tokuda, Jianhua Tao, ``Global variance modeling on frequency domain delta LSP for HMM-based speech synthesis,'' 2011 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2011), pp.4716-4719, Prague, Czech Republic, May 22-27, 2011.
  19. Xianglin Peng, Keiichiro Oura, Yoshihiko Nankaku, Keiichi Tokuda, ``Cross-Lingual Speaker Adaptation for HMM-Based Speech Synthesis Considering Differences Between Language-Dependent Average Voices,'' Proc. of IEEE 10th International Conference on Signal Processing, pp.605-608, Beijing China, 24-28 Oct. 2010.
  20. Toyohiro Hayashi, Yoshihiko Nankaku, Akinobu Lee and Keiichi Tokuda, ``Speaker Adaptation Based on Nonlinear Spectral Transform for Speech Recognition,'' Interspeech 2010, pp.542-545, Chiba Japan, 26-30 Sep. 2010.
  21. Ayami Mase, Keiichiro Oura, Yoshihiko Nankaku, Keiichi Tokuda, ``HMM-based singing voice synthesis system using pitch-shifted pseudo training data,'' Interspeech 2010, pp.845-848, Chiba Japan, 26-30 Sep. 2010.
  22. Akira Saito, Yoshihiko Nankaku, Akinobu Lee, Keiichi Tokuda, ``Voice activity detection based on conditional random fields using multiple features,'' Interspeech 2010, pp.2086-2089, Chiba Japan, 26-30 Sep. 2010.
  23. Keiichiro Oura, Kei Hashimoto, Sayaka Shiota, and Keiichi Tokuda, ``Overview of NIT HMM-based speech synthesis system for Blizzard Challenge 2010,'' Blizzard Challenge 2010 Workshop, Kyoto, Japan, September 25, 2010.
  24. Shinji Takaki, Yoshihiko Nankaku, and Keiichi Tokuda, ``Spectral modeling with contextual additive structure for HMM-based speech synthesis,'' Proc. of 7th ISCA Speech Synthesis Workshop, pp.100-105, Kyoto, Japan, Sep. 22-24, 2010.
  25. Keiichiro Oura, Ayami Mase, Tomohiko Yamada, Satoru Muto, Yoshihiko Nankaku, and Keiichi Tokuda, ``Recent Development of the HMM-based Singing Voice Synthesis System - Sinsy,'' Proc. of 7th ISCA Speech Synthesis Workshop, pp.211-216, Kyoto, Japan, Sep. 22-24, 2010.
  26. Kei Hashimoto, Yoshihiko Nankaku, and Keiichi Tokuda,``Bayesian speech synthesis framework integrating training and synthesis processes,'' Proc. of 7th ISCA Speech Synthesis Workshop, pp.106-111, Kyoto, Japan, Sep. 22-24, 2010.
  27. Mirjam Wester, John Dines, Matthew Gibson, Hui Liang, Yi-Jian Wu, Lakshmi Saheer, Simon King, Keiichiro Oura, Philip N. Garner, William Byrne, Yong Guan, Teemu Hirsimaki, Reima Karhila, Mikko Kurimo, Matt Shannon, Sayaka Shiota, Jilei Tian, Keiichi Tokuda, Junichi Yamagishi, ``Speaker adaptation and the evaluation of speaker similarity in the EMIME speech-to-speech translation project,'' Proc. of 7th ISCA Speech Synthesis Workshop, pp.192-197, Kyoto, Japan, Sep. 22-24, 2010.
  28. Yoshiaki Takahashi, Akira Tamamori, Yoshihiko Nankaku, Keiichi Tokuda, ``Face recognition based on separable lattice 2-D HMM with state duration modeling,'' 2010 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2010), pp.2162-2165, Dallas, Texas, U.S.A., March 14-19, 2010.
  29. Kyosuke Kazumi, Yoshihiko Nankaku, Keiichi Tokuda, ``Factor analyzed voice models for HMM-based speech synthesis,'' 2010 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2010), pp.4234-4237, Dallas, Texas, U.S.A., March 14-19, 2010.
  30. Akira Tamamori, Yoshihiko Nankaku, Keiichi Tokuda, ``An extension of separable lattice 2-D HMMs for rotational data variations,'' 2010 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2010), pp.2206-2209, Dallas, Texas, U.S.A., March 14-19, 2010.
  31. Heiga Zen, Mark Gales, Yoshihiko Nankaku, Keiichi Tokuda, ``Statistical parametric speech synthesis based on product of experts,'' 2010 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2010), pp.4242-4245, Dallas, Texas, U.S.A., March 14-19, 2010.
  32. Keiichiro Oura, Keiichi Tokuda, Junichi Yamagishi, Simon King, Mirjam Wester, ``Unsupervised cross-lingual speaker adaptation for HMM-based speech synthesis,'' 2010 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2010), pp.4594-4597, Dallas, Texas, U.S.A., March 14-19, 2010.
  33. Junichi Yamagishi, Bela Usabaev, Simon King, Oliver Watts, John Dines, Jilei Tian, Rile Hu, Yong Guan, Keiichiro Oura, Keiichi Tokuda, Reima Karhila, Mikko Kurimo ``Thousands of Voices for HMM-based Speech Synthesis,'' Interspeech 2009, pp.420-423, Brighton, U.K., September 6-10, 2009.
  34. Yi-Jian Wu, Yoshihiko Nankaku, Keiichi Tokuda, ``State mapping based method for cross-lingual speaker adaptation in HMM-based speech synthesis,'' Interspeech 2009, pp.528-531, Brighton, U.K., September 6-10, 2009.
  35. Sayaka Shiota, Kei Hashimoto, Yoshihiko Nankaku, Keiichi Tokuda, ``Deterministic Annealing Based Training Algorithm for Bayesian Speech Recognition,'' Interspeech 2009, pp.680-683, Brighton, U.K., September 6-10, 2009.
  36. Kei Hashimoto, Yoshihiko Nankaku, Keiichi Tokuda, ``A Bayesian Approach to Hidden Semi-Markov Model Based Speech Synthesis,'' Interspeech 2009, pp.1751-1754, Brighton, U.K., September 6-10, 2009.
  37. Keiichiro Oura, Heiga Zen, Yoshihiko Nankaku, Akinobu Lee, Keiichi Tokuda, ``Tying covariance matrices to reduce the footprint of HMM-based speech synthesis systems,'' Interspeech 2009, pp.1751-1762, Brighton, U.K., September 6-10, 2009.
  38. Ranniery Maia, Tomoki Toda, Keiichi Tokuda, Shinsuke Sakai, Satoshi Nakamura, ``A decision tree-based clustering approach to state definition in an excitation modeling framework for HMM-based speech synthesis,'' Interspeech 2009, pp.1783-1786, Brighton, U.K., September 6-10, 2009.
  39. Yi-Jian Wu, Long Qin, Keiichi Tokuda, ``An improved minimum generation error based model adaptation for HMM-based speech synthesis,'' Interspeech 2009, pp.1787-1790, Brighton, U.K., September 6-10, 2009.
  40. Heiga Zen, Keiichiro Oura, Takashi Nose, Junichi Yamagishi, Shinji Sako, Tomoki Toda, Takashi Masuko, Alan W. Black, Keiichi Tokuda, ``Recent development of the HMM-based speech synthesis system (HTS),'' Asia-Pacific Signal and Information Processing Association 2009 Annual Summit and Conference (APSIPA ASC 2009), pp.121-130, Sapporo, Japan, October 4-7, 2009.
  41. Keiichiro Oura, Yi-Jian Wu , Keiichi Tokuda, ``Overview of NIT HMM-based speech synthesis system for Blizzard Challenge 2009,'' 2009 Blizzard Challenge Workshop, September 4, 2009 (web proceedings).
  42. Kei Hashimoto, Hirohumi Yamamoto, Hideo Okuma, Eiichiro Sumita, Keiichi Tokuda, ``Reordering model using syntactic information of a source tree for statistical machine translation,'' NAACL HLT 2009 Workshop: Third Workshop on Syntax and Structure in Statistical Translation (SSST-3), pp.69-77, Boulder, Colorado, June 5, 2009.
  43. Kei Hashimoto, Heiga Zen, Yoshihiko Nankaku, Keiichi Tokuda, ``A Bayesian approach to HMM-based speech synthesis,'' 2009 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2009), pp.4029-4032, Taipei, Taiwan, April 19-24, 2009.
  44. Yi-Jian Wu, Keiichi Tokuda ``Minimum generation error training by using original spectrum as reference for log spectral distortion measure,'' 2009 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2009), pp.4013-4016, Taipei, Taiwan, April 19-24, 2009.
  45. Kaori Yutani, Yosuke Uto, Yoshihiko Nankaku, Akinobu Lee, Keiichi Tokuda, ``Voice conversion based on simultaneous modeling of spectrum and F0,'' 2009 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2009), pp.3897-3900, Taipei, Taiwan, April 19-24, 2009. Stereo-based stochastic noise compensation based on trajectory GMMs
  46. Heiga Zen, Yoshihiko Nankaku, Keiichi Tokuda, ``Stereo-based stochastic noise compensation based on trajectory GMMs,'' 2009 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2009), pp.4577-4580, Taipei, Taiwan, April 19-24, 2009.
  47. Lu Heng, Wu Yi-Jian, Tokuda Keiichi, Dai Li-Rong, Wang Ren-Hua, ``FULL covariance state duration modeling for HMM-based speech synthesis,'' 2009 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2009), pp.4033-4036, Taipei, Taiwan, April 19-24, 2009.
  48. Keiichiro Oura, Yoshihiko Nankaku, Tomoki Toda, Keiichi Tokuda, Rannierry Maia, Shinsuke Sakai, Satoshi Nakamura, ``Simultaneous Acoustic, Prosodic, and Phrasing Model Training for TTS Conversion Systems,'' International Symposium on Chinese Spoken Language Processing (ISCSLP2008), SPE1.1, pp.1-4, Kunming, China, December 16-19, 2008 (Best Student Paper Award).
  49. Yi-Jian Wu, Simon King and Keiichi Tokuda, ``Cross-Lingual Speaker Adaptation for HMM-based Speech Synthesis,'' International Symposium on Chinese Spoken Language Processing (ISCSLP2008), SPE1.1, pp.9-12, Kunming, China, December 16-19, 2008.
  50. Zhi-Peng Yu, Yi-Jian Wu, Heiga Zen, Yoshihiko Nankaku, Keiichi Tokuda, ``Analysis of stream-dependent tying structure for HMM-based speech synthesis,'' International Conference on Signal Processing (ICSP'08), pp.655-658, Beijing, China, October 26-29, 2008.
  51. Junichi Yamagishi, Heiga Zen, Yi-Jian Wu, Tomoki Toda, Keiichi Tokuda, ``HTS-2008: Yet another evaluation of speaker adaptive HMM-based speech synthesis system,'' Blizzard Challenge Workshop 2008, Brisbane, Australia, September 2008 (web proceedings).
  52. Ranniery Maia, Jinfu Ni, Shinsuke Sakai, Tomoki Toda, Keiichi TokudaTohru Shimizu, Satoshi Nakamura, ``The NICT/ATR speech synthesis system for the Blizzard Challenge 2008'', Blizzard Challenge Workshop 2008, Brisbane, Australia, September 2008 (web proceedings).
  53. Yoshitaka Yoshimi, Ryota Kakitsuba, Yoshihiko Nankaku, Akinobu Lee, Keiichi Tokuda, ``Probabilistic Answer Selection Based on Conditional Random Fields for Spoken Dialog System,'' Interspeech 2008, pp.215-218, Brisbane, Australia, September 22-26, 2008.
  54. Yi-Jian Wu, Keiichi Tokuda, ``Minimum Generation Error Training with Direct Log Spectral Distortion on LSPs for HMM-Based Speech Synthesis,'' Interspeech 2008, pp.577-580, Brisbane, Australia, September 22-26, 2008.
  55. Sayaka Shiota, Kei Hashimoto, Heiga Zen, Yoshihiko Nankaku, Akinobu Lee, Keiichi Tokuda, ``Acoustic Modeling Based on Model Structure Annealing for Speech Recognition,'' Interspeech 2008, pp.932-935, Brisbane, Australia, September 22-26, 2008.
  56. Kei Hashimoto, Heiga Zen, Yoshihiko Nankaku, Akinobu Lee, Keiichi Tokuda, ``Bayesian Context Clustering Using Cross Valid Prior Distribution for HMM-Based Speech Recognition,'' Interspeech 2008, pp.936-939, Brisbane, Australia, September 22-26, 2008.
  57. Heiga Zen, Yoshihiko Nankaku, Keiichi Tokuda, ``Probabilistic Feature Mapping Based on Trajectory HMMs,'' Interspeech 2008, pp.1068-1071, Brisbane, Australia, September 22-26, 2008.
  58. Kaori Yutani, Yosuke Uto, Yoshihiko Nankaku, Tomoki Toda, Keiichi Tokuda, ``Simultaneous Conversion of Duration and Spectrum Based on Statistical Models Including Time-Sequence Matching,'' Interspeech 2008, pp.1072-1075, Brisbane, Australia, September 22-26, 2008.
  59. Tatsuya Ito, Kei Hashimoto, Yoshihiko Nankaku, Akinobu Lee, Keiichi Tokuda, ``Speaker Recognition Based on Variational Bayesian Method,'' Interspeech 2008, pp.1417-1420, Brisbane, Australia, September 22-26, 2008.
  60. Simon King, Keiichi Tokuda, Heiga Zen, Junichi Yamagishi, ``Unsupervised Adaptation for HMM-Based Speech Synthesis,'' Interspeech 2008, pp.1869-1872, Brisbane, Australia, September 22-26, 2008.
  61. Yoshihiko Nankaku, Kazuhiro Nakamura, Heiga Zen, Keiichi Tokuda, ``Acoustic modeling with contextual additive structure for HMM-based speech recognition,'' 2008 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2008), pp.4469-4472, Las Vegas, Nevada, U.S.A., March 30-April 4, 2008.
  62. Junichi Yamagishi, Takashi Nose, Heiga Zen, Tomoki Toda, Keiichi Tokuda, ``Performance evaluation of the speaker-independent HMM-based speech synthesis system HTS-2007 for the Blizzard Challenge 2007,'' 2008 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2008), pp.3957-3960, Las Vegas, Nevada, U.S.A., March 30-April 4, 2008.
  63. Tomoki Toda, Keiichi Tokuda, ``Statistical approach to vocal tract transfer function estimation based on factor analyzed trajectory HMM,'' 2008 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2008), pp.3925-3928, Las Vegas, Nevada, U.S.A., March 30-April 4, 2008.
  64. Ranniery Maia, Tomoki Toda, Keiichi Tokuda, Shinsuke Sakai, Satoshi Nakamura, ``On the state definition for a trainable excitation model in HMM-based speech synthesis,'' 2008 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2008), pp.3965-3968, Las Vegas, Nevada, U.S.A., March 30-April 4, 2008.
  65. Yi-Jian Wu, Heiga Zen, Yoshihiko Nankaku, Keiichi Tokuda, ``Minimum generation error criterion considering global/local variance for HMM-based speech synthesis,'' 2008 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2008), pp.4621-4624, Las Vegas, Nevada, U.S.A., March 30-April 4, 2008.
  66. Heiga Zen, Yoshihiko Nankaku, Keiichi Tokuda, ``Model-Space MLLR for Trajectory HMMs,'' Interspeech 2007 - EUROSPEECH, pp.2065-2068, Antwerp, Belguim, August 27-31, 2007.
  67. Ranniery Maia, Tomoki Toda, Heiga Zen, Yoshihiko Nankaku, Keiichi Tokuda, ``A trainable excitation model for HMM-based speech synthesis,'' Interspeech 2007 - EUROSPEECH, pp,1909-1912, Antwerp, Belguim, August 27-31, 2007.
  68. Junichi Yamagishi, Heiga Zen, Tomoki Toda, Keiichi Tokuda, ``Speaker-independent HMM-based speech synthesis system - HTS-2007 system for the Blizzard Challenge 2007,'' Proc. of Blizzard Challenge 2007, Bonn, Germany, August 25, 2007 (CD-ROM Proceedings, http://festvox.org/blizzard/bc2007/index.html).
  69. Jinfu Ni, Toshio Hirai, Hisashi Kawai, Tomoki Toda, Keiichi Tokuda, Minoru Tsuzaki, Shinsuke Sakai, Ranniery Maia, Satoshi Nakamura, ``ATRECSS - ATR English speech corpus for speech synthesis,'' Proc. of Blizzard Challenge 2007, Bonn, Germany, August 25, 2007 (CD-ROM Proceedings, http://festvox.org/blizzard/bc2007/index.html).
  70. Yoshihiko Nankaku, Kenichi Nakamura, and Keiichi Tokuda, ``Spectral conversion based on statistical models including time-frequency matching,'' Proc. of 6th ISCA Speech Synthesis Workshop, Bonn, Germany, August 22-24, 2007 (CD-ROM proceedings).
  71. Shinsuke Sakai, Jinfu Ni, Ranniery Maia, Keiichi Tokuda, Minoru Tsuzaki, Tomoki Toda, Hisashi Kawai, and Satoshi Nakamura, ``Communicative Speech Synthesis with XIMERA: a first step,'' Proc. of 6th ISCA Speech Synthesis Workshop, Bonn, Germany, August 22-24, 2007 (CD-ROM proceedings).
  72. Ranniery Maia, Tomoki Toda, Heiga Zen, Yoshihiko Nankaku, Keiichi Tokuda, ``An excitation model for HMM-based speech synthesis based on residual modeling,'' Proc. of 6th ISCA Speech Synthesis Workshop, Bonn, Germany, August 22-24, 2007 (CD-ROM proceedings).
  73. Junichi Yamagishi, Takao Kobayashi, Steve Renals, Simon King, Heiga Zen, Tomoki Toda, Keiichi Tokuda, ``Improved average-voice-based speech synthesis using gender-mixed modeling and a parameter generation algorithm considering GV,'' Proc. of 6th ISCA Speech Synthesis Workshop, Bonn, Germany, August 22-24, 2007 (CD-ROM proceedings).
  74. Heiga Zen, Takashi Nose, Junichi Yamagishi, Shinji Sako, Takashi Masuko, Alan W. Black, Keiichi Tokuda, ``The HMM-based speech synthesis system (HTS) version 2.0,'' Proc. of 6th ISCA Speech Synthesis Workshop, Bonn, Germany, August 22-24, 2007 (CD-ROM proceedings).
  75. Yoshihiko Nankaku, and Keiichi Tokuda, ``Face recognition using hidden Markov eigenface models,'' 2007 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2007), vol.2, pp.II-469-II-472, Hawaii, USA, April 15-20, 2007.
  76. Alan W. Black, Heiga Zen, Keiichi Tokuda, ``Statistical parametric speech synthesis,'' 2007 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2007), vol.4, pp.IV-1229-IV-1232, Hawaii, USA, April 15-20, 2007.
  77. Keiichi Tokuda, ``Hidden Markov model-based speech synthesis as a tool for constructing comunicative spoken dialog systems,'' Proc. of The 4th Joint Meeting of The Acoustical Society of America and The Acoustical Society of Japan, Honolulu, Hawaii, 28 November-2 December 2006 (in J. Acoust. Soc. Am., vol.120, no.5, Part.2, p.3006, November 2006) (invited paper only with abstract).
  78. Yoshihiro Itogawa, Heiga Zen, Yoshihiko Nankaku, Akinobu Li, and Keiichi Tokuda, ``Decision-tree-based F0 quantization for hidden Markov model-based speech coding at 100 bit/s,'' Proc. of The 4th Joint Meeting of ASA/ASJ, Honolulu, Hawai, Nov. 28-Dec. 2, 2006 (in J. Acoust. Soc. Am., vol.120, no.5, Part.2, p.3038, November 2006) (abstract paper).
  79. Kei Hashimoto, Heiga Zen, Nankaku Yoshihiko, Lee Akinobu, and Keiichi Tokuda, ``Hyperparameter estimation for speech recognition based on variational Bayesian approach,'' Proc. of The 4th Joint Meeting of ASA/ASJ, Honolulu, Hawai, Nov. 28-Dec. 2, 2006 (in J. Acoust. Soc. Am., vol.120, no.5, Part.2, p.3042, November 2006) (abstract paper).
  80. Kazuhiro Nakamura, Heiga Zen, Yoshihiro Nankaku, and Keiichi Tokuda, ``Acoustic modeling with contextual additive structure for hidden Markov model-based speech recognition,'' Proc. of The 4th Joint Meeting of ASA/ASJ, Honolulu, Hawai, Nov. 28-Dec. 2, 2006 (in J. Acoust. Soc. Am., vol.120, no.5, Part.2, p.3042, November 2006) (abstract paper).
  81. Heiga Zen, Yoshihiko Nankaku, Keiichi Tokuda, Tadashi Kitamura, ``Speaker adaptation of trajectory HMMs using feature-space MLLR,'' Interspeech 2006 - ICLSP, pp.1141-1144, Pittsburgh, PA, Sept. 17-21, 2006.
  82. Keijiro Saino, Heiga Zen, Yoshihiko Nankaku, Akinobu Lee, Keiichi Tokuda, ``HMM-based singing voice synthesis system,'' Interspeech 2006 - ICSLP, pp.2274-2277, Pittsburgh, PA, Sept. 17-21, 2006.
  83. Yosuke Uto, Yoshihiko Nankaku, Tomoki Toda, Akinobu Lee, Keiichi Tokuda, ``Voice conversion based on mixtures of factor analyzers,'' Interspeech 2006 - ICSLP, pp.2278-2281, Pittsburgh, PA, Sept. 17-21, 2006.
  84. Tomohiro Hakamata, Akinobu Lee, Yoshihiko Nankaku, Keiichi Tokuda, ``Reducing computation on Parallel decoding using frame-wise confidence scores,'' Interspeech 2006 - ICSLP, pp.1638-1641, Pittsburgh, PA, Sept. 17-21, 2006.
  85. Heiga Zen, Tomoki Toda, Keiichi Tokuda, ``The Nitech-NAIST HMM-based speech synthesis system for the Blizzard Challenge 2006,'' Blizzard Challenge 2006 Workshop, Pittsburgh, PA, 2006 (http://festvox.org/blizzard/blizzard2006.html).
  86. Tomoki Toda, Hisashi Kawai, Toshio Hirai, Jinfu Ni, Nobuyuki Nishizawa, Junichi Yamagishi, Minoru Tsuzaki, Keiichi Tokuda, Satoshi Nakamura, ``Developing a Test Bed of English Text-to-Speech System XIMERA for the Blizzard Challenge 2006,'' Blizzard Challenge 2006 Workshop, Pittsburgh, PA, 2006 (http://festvox.org/blizzard/blizzard2006.html).
  87. Heiga Zen, Yoshihiko Nankaku, Keiichi Tokuda, Tadashi Kitamura, ``Estimating trajectory HMM parameters using Monte Carlo EM with Gibbs sampler,'' 2006 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2006), vol.1, pp.I-1173-I-1176, Toulouse, France, May 14-19, 2006.
  88. Keiichiro Oura, Heiga Zen, Yoshihiko Nankaku, Akinobu Lee, Keiichi Tokuda, ``Hidden semi-Markov model based speech recognition system using weighted finite-state transducer,'' 2006 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2006), vol.1, pp.I-33-I-36, Toulouse, France, May 14-19, 2006.
  89. Kenichi Nakamura, Tomoki Toda, Yoshihiko Nankaku, Keiichi Tokuda, ``On the use of phonetic information for mapping from articulatory movements to vocal tract spectrum,'' 2006 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2006), vol.1, pp.I-93-I-96, Toulouse, France, May 14-19, 2006.
  90. Daisuke Kurata, Yoshihiko Nankaku, Keiichi Tokuda, Tadashi Kitamura, Zoubin Ghahramani, ``Face recognition based on separable lattice HMMs,'' 2006 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2006), vol.5, pp.V-737-V-740, Toulouse, France, May 14-19, 2006 (Student Paper Award).
  91. Alan W. Black, Keiichi Tokuda, ``The Blizzard Challenge - 2005: Evaluating corpus-based speech synthesis on common datasets,'' INTERSPEECH 2005 - EUROSPEECH, pp.77-80, Lisbon, Portugal, September 4-8, 2005.
  92. Maria João Barros, Ranniery Maia, Keiichi Tokuda, Fernando Gil Resende, Diamantino Freitas, ``HMM-based European Portuguese TTS system,'' INTERSPEECH 2005 - EUROSPEECH, pp.2581-2584, Lisbon, Portugal, September 4-8, 2005.
  93. Tomoki Toda, Keiichi Tokuda, ``Speech parameter generation algorithm considering global variance for HMM-based speech synthesis,'' INTERSPEECH 2005 - EUROSPEECH, pp.2801-2804, Lisbon, Portugal, September 4-8, 2005.
  94. Yusuke Kida, Hiroyoshi Yamamoto, Chiyomi Miyajima, Keiichi Tokuda, Tadashi Kitamura, ``Minimum classification error interactive training for speaker identification,'' 2005 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2005), pp.I-641-I-644, Philadelphia, USA, March 18-23, 2005.
  95. Amaro Azevedo de Lima, Heiga Zen, Yoshihiko Nankaku, Chiyomi Miyajima, Keiichi Tokuda, Tadashi Kitamura, ``Sparse KPCA for feature extraction in speech recognition,'' 2005 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2005), pp.I-353-I-356, Philadelphia, USA, March 18-23, 2005.
  96. Tomoki Toda, Alan W. Black, Keiichi Tokuda, ``Spectral conversion based on maximum likelihood estimation considering global variance of converted parameter,'' 2005 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2005), pp.I-9-I-12, Philadelphia, USA, March 18-23, 2005.
  97. Keiichi Tokuda, Heiga Zen, and Tadashi Kitamura, ``Reformulating the HMM as a Trajectory Model,'' Workshop on Statictical modeling Approach for Speech Recognition (Beyond HMM), Kyoto, Japan, Dec. 20, 2004.
  98. Shunsuke Kataoka, Nobuaki Mizutani, Keiichi Tokuda, Tadashi Kitamura, ``Decision-tree backing-off in HMM-based speech synthesis,'' International Conference on Spoken Language Processing (INTERSPEECH2000-ICSLP2000), vol.2, pp.II-1205-II-1208, Jeju, Korea, Oct. 4-8, 2004.
  99. Ryosuke Tsuzuki, Heiga Zen, Keiichi Tokuda, Tadashi Kitamura, Murtaza Bulut, Shrikanth S. Narayanan, ``Constructing emotional speech synthesizers with limited speech database,'' International Conference on Spoken Language Processing (INTERSPEECH2004-ICSLP2004), vol.2, pp.II-1185-II-1188, Jeju, Korea, Oct. 4-8, 2004.
  100. Tomoki Toda, Alan W. Black, Keiichi Tokud ``Acoustic-to-articulatory inversion mapping with Gaussian mixture model,'' International Conference on Spoken Language Processing (INTERSPEECH2004-ICSLP2004), vol.2, pp.II-1129-II-1132, Jeju, Korea, Oct. 4-8, 2004.
  101. Heiga Zen, Keiichi Tokuda, Takashi Masuko, Takao Kobayashi, Tadashi Kitamura, ``Hidden semi-Markov model based speech synthesis,'' International Conference on Spoken Language Processing (INTERSPEECH2004-ICSLP2004), vol.2 pp.II-1393-1II-386, Jeju, Korea, Oct. 4-8, 2004.
  102. Yohei Itaya, Heiga Zen, Yoshihiko Nankaku, Chiyomi Miyajima, Keiichi Tokuda, Tadashi Kitamura, ``Deterministic annealing EM algorithm in parameter estimation for acoustic model,'' International Conference on Spoken Language Processing (INTERSPEECH2004-ICSLP2004), vol.1, pp.I-437--I-440, Jeju, Korea, Oct. 4-8, 2004.
  103. T. Nitta, S. Sagayama, Y. Yamashita, T. Kawahara, S. Morishima, S. Nakamura, A. Yamada, K. Ito, M. Kai, A. Li, M. Mimura, K. Hirose, T. Kobayashi, K. Tokuda, N. Minematsu, Y. Den, T. Utsuro, T. Yotsukura, H. Shimodaira, M. Araki, T. Nishimoto, N. Kawaguchi, H. Banno, K. Katsurada, ``Activities of Interactive Speech Technology Consortium (ISTC) Targeting Open Software Development for MMI Systems,'' 13th IEEE International Workshop on Robot and Human Interactive Communication (RO-MAN 2004), Kurashiki, Okayama, Japan, September 20-22, 2004 (CD-ROM proceedings).
  104. Heiga Zen, Keiichi Tokuda, Tadashi Kitamura, ``An introduction of trajectory model into HMM-based speech synthesis,'' Proc. of 5th ISCA Speech Synthesis Workshop, Pittsburgh, U.S.A., June 2004 (CD-ROM proceedings).
  105. Tomoki Toda, Alan W. Black, and Keiichi Tokuda, ``Mapping from articulatory movements to vocal tract spectrum with gaussian mixture model for articulatory speech synthesis,'' Proc. of 5th ISCA Speech Synthesis Workshop, Pittsburgh, U.S.A., June 2004 (CD-ROM proceedings).
  106. Hisashi Kawai, Tomoki Toda, Jinfu Ni, Minoru Tsuzaki, and Keiichi Tokuda, ``Ximera: A New TTS from ATR Based on Corpus-Based Technologies,'' ISCA 5th Speech Synthesis Workshop, pp.179-184, Pittsburgh, U.S.A., June 2004.
  107. Hiroyoshi Yamamoto, Yoshihoko Nankaku, Chiyomi Miyajima, Keiichi Tokuda, Tadashi Kitamura, ``Parameter sharing and minimum classification error training of mixtures of factor analyzers for speaker identification,'' 2004 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2004), vol.1, pp.29-32, Montreal, Canada, May 17-21, 2004.
  108. Heiga Zen, Keiichi Tokuda, Tadashi Kitamura, ``A Viterbi algorithm for a trajectory model derived from HMM with explicit relationship between static and dynamic features,'' Proceedings of 2004 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2004), vol.1, pp.837-840, Montreal, Canada, May 17-21, 2004.
  109. Takahiro Hoshiya, Heiga Zen, Shinji Sako, Keiichi Tokuda, Takashi Masuko, Takao Kobayashi, Tadashi Kitamura, ``An HMM-based approach to speaker-dependent 100 bit/s speech coding,'' Special Workshop in MAUI (SWIM), Lectures by Masters in Speech Processing, Maui, Hawaii, Jan. 12-14, 2004 (invited session).
  110. Heiga Zen, Keiichi Tokuda, Tadashi Kitamura, ``Decision Tree-based Simultaneous Clustering of Phonetic Contexts, Dimensions, and State Positions for Acoustic Modeling,'' Proceedings of European Conference on Speech Communication and Technology, pp.3189-3192, Geneva, Switzerland, Sep. 1-4, 2003.
  111. Amaro Azevedo de Lima, Heiga Zen, Yoshihiko Nankaku, Chiyomi Miyajima, Keiichi Tokuda, Tadashi Kitamura, ``On the Use of Kernel PCA for Feature Extraction in Speech Recognition,'' Proceedings of European Conference on Speech Communication and Technology, pp.2625-2628, Geneva, Switzerland, Sep. 1-4, 2003.
  112. Ranniery da Silva Maia, Heiga Zen, Keiichi Tokuda, Tadashi Kitamura, Fernando Gil Vianna Resende Junior, ``Towards the development of a Brazilian Portuguese text-to-speech system based on HMM,'' Proceedings of European Conference on Speech Communication and Technology, pp.2465-2468, Geneva, Switzerland, Sep. 1-4, 2003.
  113. Keiichi Tokuda, Heiga Zen, Tadashi Kitamura, ``Trajectory modeling based on HMMs with the explicit relationship between static and dynamic features,'' Proceedings of European Conference on Speech Communication and Technology, pp.865-868, Geneva, Switzerland, Sep. 1-4, 2003.
  114. Junichi Yamagishi, Takashi Masuko, Keiichi Tokuda, Takao Kobayashi, ``A training method for average voice model based on shared decision tree context clustering and speaker adaptive training,'' Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), vol.1, pp.716-719, Hong Kong, April 6-10, 2003.
  115. Hiroyuki Suzuki, Heiga Zen, Yoshihiko Nankaku, Chiyomi Miyajima, Keiichi Tokuda, Tadashi Kitamura, ``Speech recognition using voice-characteristic-dependent acoustic models,'' Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), vol.1, pp.740-743, Hong Kong, April 6-10, 2003.
  116. Takahiro Hoshiya, Shinji Sako, Keiichi Tokuda, Takashi Masuko, Takao Kobayashi, Tadashi Kitamura, Heiga Zen, `` Improving the performance of HMM-based very low bitrate speech coding,'' Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), vol.1, pp.800-803, Hong Kong, April 6-10, 2003.
  117. Keiichi Tokuda, Zen Heiga, Alan W. Black, ``An HMM-based speech synthesis system applied to English,'' 2002 IEEE Speech Synthesis Workshop, Santa Monica, California, Sep. 11-13, 2002 (CD-ROM proceedings).
  118. Shin-ichi Kawamoto, Hiroshi Shimodaira, Tsuneo Nitta, Takuya Nishimoto, Satoshi Nakamura, Katsunobu Itou, Shigeo Morishima, Tatsuo Yotsukura, Atsuhiko Kai, Akinobu Lee, Yoichi Yamashita, Takao Kobayashi, Keiichi Tokuda, Keikichi Hirose, Nobuaki Minematsu, Atsushi Yamada, Yasuharu Den, Takehito Utsuro, Shigeki Sagayama, ``Open-source Software for Developing Anthropomorphic Spoken Dialog Agents,'' International Workshop on LIFELIKE ANIMATED AGENTS Tools, Affective Functions, and Applications, pp.64-69, Tokyo, Japan, August 19, 2002.
  119. Junichi Yamagishi, Masatsune Tamura, Takashi Masuko, Keiichi Tokuda, Takao Kobayashi, ``A context clustering technique for average voice model in HMM-based speech synthesis,'' 8th International Conference on Spoken Language Processing, pp.133-136, Sep. 16-20, Denver, Colorado, 2002.
  120. Kengo Shichiri, Atsushi Sawabe, Keiichi Tokuda, Takashi Masuko, Takao Kobayashi, Tadashi Kitamura, ``Eigenvoices for HMM-based speech synthesis,'' 8th International Conference on Spoken Language Processing, pp.1269-1272, Sep. 16-20, Denver, Colorado, 2002.
  121. Heiga Zen, Keiichi Tokuda, Tadashi Kitamura, ``Decision tree distribution tying based on a dimensional split technique,'' 8th International Conference on Spoken Language Processing, pp.1257-1260, Sep. 16-20, Denver, Colorado, 2002.
  122. Shin-ichi Kawamoto, Hiroshi Shimodaira, Shigeki Sagayama, Tsuneo Nitta, Takuya Nishimoto, Satoshi Nakamura, Katunobu Itou, Shigeo Morishima, Tatsuo Yotsukura, Akihiko Kai, Akinobu Lee, Yoichi Yamashita, Takao Kobayashi, Keiichi Tokuda, Keikichi Hirose, Nobuaki Minematsu, Atsushi Yamada, Yasuharu Den, Takehito Utsuro, ``Developments of anthropomorphic dialog agent: A plan and development and its significance,'' International Workshop on Information Presentation and Natural Multimodal Dialogue, Verona, Italy, 14-15 Dec. 2001.
  123. Takayoshi Yoshimura, Keiichi Tokuda, Takashi Masuko, Takao Kobayashi, Tadashi Kitamura, ``Mixed excitation for HMM-based speech Synthesis,'' Proceedings of European Conference on Speech Communication and Technology, vol.3, pp.2263-2266, Aalborg, Denmark, Sep. 3-7, 2001.
  124. Takayuki Satoh, Takashi Masuko, Takao Kobayashi, Keiichi Tokuda, ``A robust speaker verification system against imposture using an HMM-based speech synthesis system,'' Proceedings of European Conference on Speech Communication and Technology, vol.2, pp.759-762, Aalborg, Denmark, Sep. 3-7, 2001. n
  125. Masatsune Tamura, Takashi Masuko, Keiichi Tokuda, Takao Kobayashi, ``Text-to-speech synthesis with arbitrary speaker's voice from average voice,'' Proceedings of European Conference on Speech Communication and Technology, vol.1, pp.345-348, Aalborg, Denmark, vol.1 pp.345-348, Sep. 3-7, 2001.
  126. Chiyomi Miyajima, Keiichi Tokuda, Tadashi Kitamura, ``Minimum classification error training for speaker identification using Gaussian mixture models based on multi-space probability distribution,'' Proceedings of European Conference on Speech Communication and Technology, Aalborg, Denmark, vol.4, pp.2347-2350, Sep. 3-7, 2001.
  127. Masatsune Tamura, Takashi Masuko, Keiichi Tokuda and Takao Kobayashi, ``Adaptation of pitch and spectrum for HMM-based speech synthesis using MLLR,'' Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), vol.2, pp.805-808, Salt Lake City, Utah, USA, May 7-11, 2001.
  128. Chiyomi Miyajima, Yosuke Hattori, Keiichi Tokuda, Takashi Masuko, Takao Kobayashi, and Tadashi Kitamura, ``Speaker identification using Gaussian mixture models based on multi-space probability distribution,'' Proceedings of International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Salt Lake City, Utah, USA, pp.433-436, May 7-11, 2001.
  129. Junibakti Sanubari, Keiichi Tokuda, ``Fast convergence transversal adaptive filtering algorithm for impulsive environment based on t-distribution,'' 2001 IEEE International Symposium on Circuits and Systems, Sydney, Australia, May 6 - 9, 2001.
  130. Takahiro Nakanishi, Keiichi Tokuda, Tadashi Kitamura, ``Simultaneous determination of model-order and frame partitioning for time series analysis based on MDL criterion,'' International Symposium on Information Theory and Its Applications (ISITA-2000), Honolulu, Hawaii, November 5-8, 2000 (accepted).
  131. Chiyomi Miyajima, Keiichi Tokuda, Tadashi Kitamura, ``Audio-visual speech recognition based on minimum classification error discriminative training,'' 2000 IEEE International Workshop on Neural Networks for Signal Processing, Syndney, Australia, pp.3-12, 11-13 Dec. 2000 (invited session).
  132. Shinji Sako, Keiichi Tokuda, Takashi Masuko, Takao Kobayashi, Tadashi Kitamura, ``HMM-based text-to-audio-visual speech synthesis,'' International Conference on Spoken Language Processing (ICSLP2000/INTERSPEECH2000), vol.III, pp.25-28, Beijing, China, Oct. 16-20, 2000 (invited session).
  133. Chiyomi Miyajima, Keiichi Tokuda, Tadashi Kitamura, ``Audio-visual speech recognition using MCE-based HMMs and model-dependent stream weights,'' International Conference on Spoken Language Processing (ICSLP2000/INTERSPEECH2000), vol.II, pp.1023-1026, Beijing, China, Oct. 16-20, 2000.
  134. Takashi Masuko, Keiichi Tokuda and Takao Kobayashi, ``Imposture using synthetic speech against speaker verification based on spectrum and pitch,'' International Conference on Spoken Language Processing (ICSLP2000/INTERSPEECH2000), vol.III, pp.302-305, Beijing, China, Oct. 16-20, 2000.
  135. Toru Takahashi, Keiichi Tokuda, Takao Kobayashi, Tadashi Kitamura, ``Vector quantization of mel-cepstral coefficients based on a statistical measure,'' IEEE International Synposium on Intelligent Signal Processing and Communication Synstems, Honolulu, Hawaii, pp.692-695, Nov. 5-8, 2000.
  136. Junibakti Sanubari, Keiichi Tokuda, ``Robust estimation of an AR multi-channel model by using t-distribution assumption,'' Proc. The 10th European Signal Processing Conference (EUSIPCO-2000), vol.3, pp.1783-1786, Tempere, Finland, 4-8, Sep. 2000.
  137. Yoshihiko Nankaku, Keiichi Tokuda, Takao Kobayashi, Tadashi Kitamura, ``Normalized training for HMM-based visual speech recognition,'' Proc. of IEEE International Conferece on Image Processing, Vancouver, Canada, vol.3, pp.234-237, Sep. 2000.
  138. Keiichi Tokuda, Takayoshi Yoshimura, Takashi Masuko, Takao Kobayashi, Tadashi Kitamura, ``Speech parameter generation algorithms for HMM-based speech synthesis,'' Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing, Istanbul, Turkey, vol.3, pp.1315-1318, June 2000.
  139. Junibakti Sanubari, Keiichi Tokuda, ``Image modeling using two dimentional exponential systems,'' IEEE International Conference on Image Processing, Kobe, Japan, pp.28AP4.8.1-28AP4.8.4, Oct. 1999.
  140. Junibakti Sanubari, Keiichi Tokuda, ``Two dimensional adaptive filter based on t-distribution assumption and full-plane support,'' Proceedings of Thirty-Third Asilomar Conference on Signal, Systems, and Computers, Pcific Groove, California, Oct. 24-27, pp.815-819, 1999.
  141. Oscar Vanegas, Keiichi Tokuda, Tadashi Kitamura, ``Location normalization of HMM-based lip reading: Experiments for the M2VTS Database,'' IEEE International Conference on Image Processing, Kobe, Japan, Oct. 1999 (accepted).
  142. Takayoshi Yoshimura, Keiichi Tokuda, Takashi Masuko, Takao Kobayashi and Tadashi Kitamura, ``Simultaneous modeling of spectrum, pitch and duration in HMM-based speech synthesis,'' Proceedings of European Conference on Speech Communication and Technology, Budapest, Hungary, vol.5, pp.2347-2350, Sep. 1999.
  143. Yoshihiko Nankaku, Keiichi Tokuda and Tadashi Kitamura, ``Intensity- and location-normalized training for HMM-based visual speech recognition,'' Proceedings of European Conference on Speech Communication and Technology, Budapest, Hungary, vol.3, pp.1287-1290, Sep. 1999.
  144. Takashi Masuko, Takafumi Hitotsumatsu, Keiichi Tokuda and Takao Kobayashi, ``On the security of HMM-based speaker verification systems against imposture using synthetic speech,'' Proceedings of European Conference on Speech Communication and Technology, Budapest, Hungary, vol.3, pp.1223-1226, Sep. 1999.
  145. Junibakti Sanubari, Keiichi Tokuda, ``LMS-like two dimensional adaptive filter with t-distribution assumption and non-symmetral half plane support,'' Proceedings of IEEE-EURASIP Workshop on Nonlinear and Image Processing, Antalaya, Turkey, pp.419-423, June 1999.
  146. Keiichi Tokuda, Takashi Masuko, Noboru Miyazaki and Takao Kobayashi, ``Hidden Markov models based on multi-space probability distribution for pitch pattern modeling,'' Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing, vol.1, pp.229-232, Phoenix, USA, Mar. 1999.
  147. Masatsune Tamura, Takashi Masuko, Takao Kobayashi and Keiichi Tokuda, ``Visual speech synthesis based on parameter generation from HMM: speech-driven and text-and-speech-driven approach,'' Proc. International Conference of Auditory-Visual Speech Processing, pp.219-224, Terrigal, Australia, Dec. 1998.
  148. Kazuhito Koishida, Goh Hirabayashi, Keiichi Tokuda, and Takao Kobayashi, ``A 16kbit/s wideband CELP coder using mel-generalized cepstral analysis and its subjective evaluation,'' Proc. of International Conference on Spoken Language Processing (ICLSP-98), vol.6., pp.2583-2586, Sydney, Australia, Nov.-Dec., 1998.
  149. Oscar Vanegas, Akiji Tanaka, Keiichi Tokuda, Tadashi Kitamura, ``HMM-based visual speech recognition using intensity and location normalization,'' Proc. of International Conference on Spoken Language Processing (ICLSP-98), vol.2, pp.789-792, Sydney, Australia, Nov.-Dec., 1998.
  150. Takayoshi Yoshimura, Keiichi Tokuda, Takashi Masuko, Takao Kobayashi and Tadashi Kitamura, ''Duration modeling for HMM-based speech synthesis,'' Proc. of International Conference on Spoken Language Processing (ICLSP-98), vol.2, Sydney, Australia, pp.29-32, Nov.-Dec., 1998.
  151. Takashi Masuko, Takao Kobayashi and Keiichi Tokuda, ''A very low bit rate speech coder using HMM with speaker adaptation,'' Proc. of International Conference on Spoken Language Processing (ICLSP-98), vol.2, pp.507-510, Sydney, Australia, Nov.-Dec., 1998.
  152. Masatsune Tamura, Takashi Masuko, Keiichi Tokuda and Takao Kobayashi, ''Speaker adaptation for HMM-based speech synthesis system using MLLR,'' Proc. ESCA/COCOSDA Workshop on Speech Synthesis, pp.273-276, Blue Mountains, Australia, Nov. 1998.
  153. Oscar Vanegas, Akiji Tanaka, Keiichi Tokuda, Tadashi Kitamura, ``Intensity/location normalization for automatice lipreading,'' Proc. International Conference on Signal Processing, vol.2, pp.920-923, Oct. 1998.
  154. Junibakti Sanubari, Keiichi Tokuda, ``Recursive two dimensional spectral estimation based on an AR model excited by a t-distribution process using AR decomposition approach,'' Proceedings of IEEE Asia Pacific Conference on Circuits and Systems, Chiang Mai, Thailand, pp.447-450, Nov. 1998.
  155. Junibakti Sanubari, Keiichi Tokuda, ``Adaptive two dimensional filter based on an AR model excited by a t-distribution process,'' Proceedings of IESTED International Conference on Signal and Image Processing, Las Vegas, Nevada-USA, pp.679-683, Oct. 1998.
  156. Junibakti Sanubari, Keiichi Tokuda, ``Adaptive spectral estimation based on an exponential model,'' Proceedings of IEEE International Conference on Circuits and Systems, Monterey, California, pp.TAA13-11.1-TAA13-11.4, May 1998.
  157. Keiichi Tokuda, Takashi Masuko, Jun Hiroi, Takao Kobayashi, and Tadashi Kitamura, ``A very low bit rate speech coder using HMM-based speech recognition/synthesis techniques,'' Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing, vol.2, pp.609-612, May 1998.
  158. Kazuhito Koishida, Goh Hirabayashi, Keiichi Tokuda, and Takao Kobayashi, ``A wideband CELP speech coder at 16 kbit/s based on mel-generalized cepstral analysis,'' Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing, vol.1, pp.161-164, Seattle, USA, May 1998.
  159. Takashi Masuko, Takao Kobayashi, Masatsune Tamura, Jun Masubuchi, and Keiichi Tokuda, ``Text-to-visual speech synthesis based on parameter generation from HMM,'' Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing, vol.6, pp.3745-3748, Seattle, USA, May 1998.
  160. Junibakti Sanubari and Keiichi Tokuda, ``Non stationary spectral estimation based on robust time varying AR model excited by a t-distribution process,'' IEEE Region Ten Annual Conference on Speech and Image Technologies for Computing and Telecommunications, Brisbane, Australia, pp.51-54, Dec. 1997.
  161. Takao Kobayashi, Takashi Masuko and Keiichi Tokuda, ``HMM compensation for noisy speech recognition based on cepstral parameter generation,'' Proceedings of European Conference on Speech Communication and Technology, vol.3, pp.1583-1586, Rhodes, Greece, Sep. 1997.
  162. Takayoshi Yoshimura, Takashi Masuko, Keiichi Tokuda, Takao Kobayashi and Tadashi Kitamura, ``Speaker interpolation in HMM-based speech synthesis system,'' Proceedings of European Conference on Speech Communication and Technology, vol.5, pp.2523-2526, Rhodes, Greece, Sep. 1997.
  163. Kazuhito Koishida, Keiichi Tokuda, Takashi Masuko and Takao Kobayashi, ``Spectral quantization using statistics of static and dynamic features,'' Proc. of 1997 IEEE Workshop on Speech Coding for Telecommunications, pp.19-20, Pocono Manor, USA, Sep. 1997.
  164. Chiyomi Miyajima, Yoshitsuna Sugiura, Keiichi Tokuda and Tadashi Kitamura, ``Descrete or tied-mixture HMM based of sefl-organizing feature map for robust probability estimation,'' Proceedings of International Conference on Speech Processing, vol.2, pp.529-532, Seoul, Korea, Aug. 1997.
  165. Kazuhito Koishida, Keiichi Tokuda, Takashi Masuko and Takao Kobayashi, ``Vector quantization of speech spectral parameters using statistics of dynamic features,'' Proceedings of International Conference on Speech Processing, vol.1, pp.247-252, Seoul, Korea, Aug. 1997.
  166. Junibakti Sanubari, Keiichi Tokuda, ``Robust spectral estimation based on an AR model excited by a t-distribution process by using QR decomposition algorithm,'' Proceedings of IEEE International Conference on Circuits and Systems, pp.2497-2500, June 1997.
  167. Fernando G. Resende, Keiichi Tokuda and Mineo Kaneko, ``Multi-band decomposition of the linear prediction error applied to the least-mean squares method with fixed and variable step-sizes,'' Proceedings of IEEE International Conference on Circuits and Systems, pp.2176-2179, June 1997.
  168. Takashi Masuko, Keiichi Tokuda, Takao Kobayashi and Satoshi Imai, ``Voice characteristics conversion for HMM-based speech synthesis system,'' Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing, vol.3, pp.1611-1614, Munichi, Germany, Apr. 1997.
  169. Kazuhito Koishida, Keiichi Tokuda, Takao Kobayashi and Satoshi Imai, ``Efficient encoding of mel-generalized cepstrum for CELP coders,'' Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing, vol.2, pp.1355-1358, Munichi, Germany, Apr. 1997.
  170. Yasuichi Hamano, Keiichi Tokuda and Mineo Kaneko, ``Image restoration based on estimation of fractal structure,'' IEEE Region Ten Conference (Digital Signal Processing Applications), pp.311-316, Nov. 1996.
  171. Fernando G. Resende, Keiichi Tokuda and Mineo Kaneko, ``RLS algorithms for adaptive AR spectrum analysis based on multi-band decomposition of the linear prediction error,'' IEEE Region Ten Conference (Digital Signal Processing Applications), pp.541-546, Nov. 1996.
  172. Keiichi Tokuda, Takao Kobayashi, Takashi Masuko and Satoshi Imai, ``Quantization of vector sequence using statistics of neighboring input vectors,'' Proc. of ASA and ASJ 3rd Joint Meeting, Honolulu, USA, pp.1067-1072, Dec. 1996.
  173. Takao Kobayashi, Takashi Masuko, Keiichi Tokuda and Satoshi Imai, ``Noisy speech recognition using HMM-based cepstral parameter generation and compensation,'' Proc. of ASA and ASJ 3rd Joint Meeting, Honolulu, USA, pp.1117-1122, Dec. 1996.
  174. Takashi Masuko, Keiichi Tokuda, Takao Kobayashi and Satoshi Imai, ``HMM-based speech synthesis with various voice characteristics,'' Proc. of ASA and ASJ 3rd Joint Meeting, Honolulu, USA, pp.1043-1046, Dec. 1996.
  175. Kazuhito Koishida, Keiichi Tokuda, Takao Kobayashi and Satoshi Imai, ``Spectral representation of speech using mel-generalized cepstral coefficients,'' Proc. of ASA and ASJ 3rd Joint Meeting, Honolulu, USA, pp.963-968, Dec. 1996.
  176. Kazuhito Koishida, Keiichi Tokuda, Takao Kobayashi and Satoshi Imai, ``CELP coding system based on mel-generalized cepstral analysis,'' Proceedings of International Conference on Spoken Language Processing, Philadelphia, USA, vol.1, pp.314-317, Oct. 1996.
  177. Junibakti Sanubari, Keiichi Tokuda and Mahoki Onoda, ``The application of t-distribution assumption for robust spectral estimation,'' Proc. of the IASTED International Conferences on Signal, Image Processing and Application, SIPA-96, Annecy, France, pp.217-220, June 1996.
  178. Junibakti Sanubari, Keiichi Tokuda, Mahoki Onoda, ``Robust two-dimensional spectral estimation based on an AR model excited by a t-distribution process,'' Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing, vol.5, pp.2998-3001, Atlanta, USA, May 1996.
  179. Takashi Masuko, Keiichi Tokuda, Takao Kobayashi and Satoshi Imai, ``Speech synthesis from HMMs using dynamic features,'' Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing, vol.1, pp.389-392, May 1996.
  180. Fernando G. Resende, Keiichi Tokuda and Mineo Kaneko, ``A fast algorithm for adaptive AR spectral estimation based on multi-scale decomposition of linear prediction error,'' Proceedings of Midwest Symposium on Circuits and Systems, pp.119-122, Aug. 1995.
  181. Keiichi Tokuda, Takashi Masuko, Tetsuya Yamada, Takao Kobayashi and Satoshi Imai, ``An algorithm for speech parameter generation from continuous mixture HMMs with dynamic features,'' Proceedings of European Conference on Speech Communication and Technology, vol.1, pp.757-760, Sep. 1995.
  182. Keiichi Tokuda, Takao Kobayashi and Satoshi Imai, ``Speech parameter generation from HMM using dynamic features,'' Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing, vol.1, pp.660-663, May 1995.
  183. Kazuhito Koishida, Keiichi Tokuda, Takao Kobayashi and Satoshi Imai, ``CELP coding based on mel-cepstral analysis,'' Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing, vol.1, pp.33-36, May 1995.
  184. Kazuhito Koishida, Keiichi Tokuda, Takao Kobayashi and Satoshi Imai, ``Speech coding based on adaptive mel-cepstral analysis for noisy channels,'' Proceedings of International Conference on Spoken Language Processing, vol.4, pp.2087-2090, Sep. 1994.
  185. Keiichi Tokuda, Takao Kobayashi, Takashi Masuko and Satoshi Imai, ``Mel-generalized cepstral analysis --a unified approach to speech spectral estimation,'' Proceedings of International Conference on Spoken Language Processing, vol.3, pp.1043-1046, Sep. 1994.
  186. Fernando G. Resende, Keiichi Tokuda and Mineo Kaneko, ``AR spectrum estimation based on wavelet representation,'' Proceedings of IEEE International Conference on Circuits and Systems, vol.2, pp.625-628, June 1994.
  187. Junibakti Sanubari, Keiichi Tokuda, Mahoki Onoda, ``Robust recursive spectral estimation based on AR model excited by a t-distribution process,'' Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing, vol.3, pp.497-500, Apr. 1994.
  188. Keiichi Tokuda, Hidetoshi Matsumura, Takao Kobayashi and Satoshi Imai, ``Speech coding based on adaptive mel-cepstral analysis,'' Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing, vol.1, pp.197-200, Apr. 1994.
  189. Junibakti Sanubari, Keiichi Tokuda and Mahoki Onoda, ``Spectral estimation based on AR model excited by t-distribution process,'' Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing, vol.5, pp.521-524, Mar. 1992.
  190. Takao Kobayashi, Kazuyoshi Fukushi, Keiichi Tokuda and Satoshi Imai, ``Design of stable two-dimensional IIR digital filters with arbitrary magnitude function,'' Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing, vol.5, pp.93-96, Mar. 1992.
  191. Toshiaki Fukada, Keiichi Tokuda, Takao Kobayashi and Satoshi Imai, ``An adaptive algorithm for mel-cepstral analysis of speech,'' Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing, vol.1, pp.137-140, Mar. 1992.
  192. Keiichi Tokuda, Takao Kobayashi and Satoshi Imai, ``Generalized cepstral analysis of speech --unified approach to LPC and cepstral method,'' Proceedings of International Conference on Spoken Language Processing, pp.37-40, Nov. 1990.
  193. Keiichi Tokuda, Takao Kobayashi, Shoji Shiomoto and Satoshi Imai, ``Adaptive filtering based on cepstral representation --adaptive cepstral analysis of speech,'' Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing, pp.377-380, Apr. 1990.

Keiichi Tokuda 2013-02-11