* International conference and workshop [#beaea485]
 #contents
 
 ** 2016 [#n926bc0d]
 - ''Heiga Zen'', Yannis Agiomyrgiannakis, Niels Egberts, Fergus Henderson, Przemysław Szczepaniak, '''Fast, compact, and high quality LSTM-RNN based statistical parametric speech synthesizers for mobile devices,''' Proc. Interspeech (accepted), San Francisco, U.S.A., September 2016.
 - Keiichi Tokuda, ''Heiga Zen'', '''Directly modeling voiced and unvoiced components in speech waveforms by neural networks,''' Proc. ICASSP, pp. 5640--5644, Shanghai, P.R. China, April 2016 &ref(https://arxiv.org/abs/1605.07809,,paper);
 
 - ''Heiga Zen'', Yannis Agiomyrgiannakis, Niels Egberts, Fergus Henderson, Przemysław Szczepaniak, '''Fast, compact, and high quality LSTM-RNN based statistical parametric speech synthesizers for mobile devices,''' Proc. Interspeech (accepted), San Francisco, CA, U.S.A., September 2016 &ref(https://arxiv.org/abs/1606.06061,,paper);
 
 - Bo Li, ''Heiga Zen'', '''Multi-language multi-speaker acoustic modeling for LSTM-RNN based statistical parametric speech synthesis,''' Proc. Interspeech (accepted), San Francisco, CA, U.S.A., September 2016 &ref(http://research.google.com/pubs/pub45400.html,,paper);
 
 - Hideki Kawahara, Yannis Agiomyrgiannakis, ''Heiga Zen'', '''Using instantaneous frequency and aperiodicity detection to estimate F0 for high-quality speech synthesis,''' Proc. ISCA SSW9 (submitted), Sunnyvale, CA, U.S.A., September 2016 &ref(https://arxiv.org/abs/1605.07809,,paper);
 
 ** 2015 [#jdaf39a1]
 - ''Heiga Zen'', Hasim Sak, '''Unidirectional long short-term memory recurrent neural network with recurrent output layer for low-latency speech synthesis,''' Proc. ICASSP, pp.4470--4474, Brisbane, Australia, April 2015 &ref(http://static.googleusercontent.com/media/research.google.com/ja//pubs/archive/43266.pdf,,paper);
 
 - Keiichi Tokuda, ''Heiga Zen'', '''Directly modeling speech waveforms by neural networks for statistical parametric speech synthesis''', Proc. ICASSP, pp.4215--4219, Brisbane, Australia, April 2015 &ref(http://static.googleusercontent.com/media/research.google.com/ja//pubs/archive/43267.pdf,,paper);
 
 - ''Heiga Zen'', '''Acoustic modeling in statistical parametric speech synthesis - From HMM to LSTM-RNN,''' Proc. MLSLP, Aizu-Wakamatsu, Japan, September 2015.
 &ref(http://static.googleusercontent.com/media/research.google.com/en//pubs/archive/43893.pdf,,paper);
 
 ** 2014 [#t6b31484]
 - ''Heiga Zen'', Andrew Senior, '''Deep mixture density networks for acoustic modeling in statistical parametric speech synthesis,''' Proc. ICASSP, pp.3872--3876, Florence, Italy, May 2014. &ref(http://static.googleusercontent.com/media/research.google.com/ja//pubs/archive/42020.pdf,,paper);
 ** 2013 [#z8f7aa73]
 - ''Heiga Zen'', Andrew Senior, Mike Schuster, '''Statistical parametric speech synthesis using deep neural networks,''' Proc. of ICASSP, pp.7962--7966, Vancouver, Canada, May 2013. &ref(http://research.google.com/pubs/archive/40837.pdf,,paper);
 
 ** 2012 [#g25d9eb2]
 - Cassia Valentini-Botinhao, Ranniery Maia, Junichi Yamagishi, Simon King, ''Heiga Zen'', '''Cepstral analysis based on the Glimpse proportion measure for improving the intelligibility of HMM-based synthetic speech in noise,''' Proc of ICASSP, pp.3997--4000, Kyoto, Japan, March 2012.
 
 - Vincent Wan, Javier Latorre, K. K. Chin, Langzhou Chen, Mark J. F. Gales, ''Heiga Zen'', Kate Knill, Masami Akamine, '''Combining multiple high quality corpora for improving HMM-TTS,''' Proc. of Interspeech, pp.1135--1138, Portland, OR, U.S.A., September 2012. 
 
 ** 2011 [#xd054b63]
 - ''Heiga Zen'', Mark J. F. Gales, '''Decision tree-based context clustering based on cross validation and hierarchical priors,''' Proc. of ICASSP, pp.4560-4563, Prague, Czech, May 2011. &ref(zen-icassp2011.pdf,,paper); &ref(zen-icassp2011-slide.pdf,,slide);
 
 - Matt Shannon, ''Heiga Zen'', William Byrne, '''The effect of using normalized models in statistical speech synthesis,''' Proc. of Interspeech, pp.121--124, Florence, Italy, August 2011. &ref(http://mi.eng.cam.ac.uk/~sms46/,,link);
 
 - Ranniery Maia, ''Heiga Zen'', Kate Knill, Mark J. F. Gales, Sabine Buchholz, '''Multipulse sequences for residual signal modeling,''' Proc. of Interspeech, pp.1833--1836, Florence, Italy, August 2011.
 
 - 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,''' Proc. of Interspeech, pp.1801--1804, Florence, Italy, August 2011.
 
 - Nicholas Pilkington, ''Heiga Zen'', Mark J. F. Gales, '''Gaussian process experts for voice conversion,''' Proc. of Interspeech, pp.2761--2764, Florence, Italy, August 2011. &ref(pilkington-interspeech2011.pdf,,paper); &ref(pilkington-interspeech2011-poster.pdf,,poster); 
 
 ** 2010 [#e146e5c5]
 - ''Heiga Zen'', Mark J. F. Gales, Yoshihiko Nankaku, Keiichi Tokuda, '''Statistical parametric speech synthesis based on product of experts,''' Proc. of ICASSP2010, pp.4242-4245, Dallas, TX, U.S.A., March 2010. &ref(zen-icassp2010.pdf,,paper); &ref(zen-icassp2010-slide.pdf,,slide);
 
 - Ranniery Maia, ''Heiga Zen'', Mark J. F. Gales, '''Statistical parametric speech synthesis with joint estimation of acoustic and excitation model parameters,''' Proc. of ISCA SSW7, pp.88-93, Kyoto, Japan, Sept. 2010.
 
 - ''Heiga Zen'', Norbert Braunschweiler, Sabine Buchholz, Kate Knill, Sacha Krstulovic, Javier Latorre, '''HMM-based polyglot speech synthesis by speaker and language adaptive training,''' Proc. of ISCA SSW7, pp186-191, Kyoto, Japan, Sept. 2010. &ref(zen-ssw7.pdf,,paper); &ref(zen-ssw7-slide.pdf,,slide);
 
 - ''Heiga Zen'', '''Speaker and language adaptive training for HMM-based polyglot speech synthesis, ''' Proc. of Interspeech2010, pp.410-413, Makuhari, Japan, Sept. 2010. &ref(zen-interspeech2010.pdf,,paper); &ref(zen-interspeech2010-slide.pdf,,slide);
 
 - Kai Yu, ''Heiga Zen'', Francois Mairesse, Steve Young, '''Context adaptive training with factorized decision trees for HMM-based speech synthesis''', Proc. of Interspeech2010, pp.414-417, Makuhari, Japan, Sept. 2010. &ref(http://mi.eng.cam.ac.uk/~ky219/papers/yu-is10.pdf,,link);
 
 - Nicholas Pilkington, ''Heiga Zen'', '''An implementation of decision tree-based context clutering on graphics processing units''', Proc. of Interspeech2010, pp.833-836, Makuhari, Japan, Sept. 2010. &ref(pilkington-interspeech2010.pdf,,paper); &ref(pilkington-interspeech2010-poster.pdf,,poster);
 
 - Javier Latorre, Mark J.F. Gales, ''Heiga Zen'', '''Training a parametric-based log F0 model with the minimum generation error criterion''', Proc. of Interspeech2010, pp.2174-2177, Makuhari, Japan, Sept. 2010.
 
 ** 2009 [#dd117d23]
 - ''Heiga Zen'', Yoshihiko Nankaku, Keiichi Tokuda, '''Continuous stochastic feature mapping based on trajectory HMMs,''' [[2nd One Day Meeting on Unified Models for Speech Recognition and Synthesis:http://postgrad.eee.bham.ac.uk/liuy/2nd-one-day-meeting.html]], Birmingham, UK, March 2009. &ref(zen-trjMapping-bham09.pdf,,slide);
 
 - ''Heiga Zen'', Yoshihiko Nankaku, Keiichi Tokuda, '''Stereo-based stochastic noise compensation based on trajectory GMMs,''' Proc. of ICASSP2009, pp.4577-4580, Taipei, Taiwan, April 2009. &ref(zen-icassp09.pdf,,paper); &ref(zen-icassp09-poster.pdf,,poster);
 
 - Kei Hashimoto, ''Heiga Zen'', Yoshihiko Nankaku, Takashi Masuko, Keiichi Tokuda, '''A Bayesian approach to HMM-based speech synthesis,''' Proc. of ICASSP2009, pp.4029-4033, Taipei, Taiwan, April 2009. &ref(http://www.sp.nitech.ac.jp/~bonanza/lists.html,,link);
 
 - ''Heiga Zen'', Norbert Braunschweiler, '''Context-dependent additive log F0 model for HMM-based speech synthesis,''' Proc. of Interspeech2009, pp.2091-2094, Brighton, UK, Sept. 2009. &ref(zen-interspeech09.pdf,,paper); &ref(zen-interspeech09-poster.pdf,,poster);
 
 - Keiichiro Oura, ''Heiga Zen'', Yoshihiko Nankaku, Akinobu Lee, Keiichi Tokuda, '''Tying covariance matrices to reduce the footprint of HMM-based speech synthesis systems,''' Proc. of Interspeech2009, pp.1759-1762, Brighton, UK, Sept. 2009. &ref(http://www.sp.nitech.ac.jp/~uratec/index.php?HOME#ba2d35f3,,link);
 
 - ''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),''' Proc. APSIPA ASC 2009, Sapporo, Japan, Oct. 2009 (accepted).
 
 
 ** 2008 [#b551810e]
 - Yi-Jian Wu, ''Heiga Zen'', Yoshihiko Nankaku, Keiichi Tokuda, 
 '''Minimum generation error criterion considering global/local variance for HMM-based speech synthesis,''' Proc. of ICASSP2008, pp.4621-4624, Las Vegas, NV, Mar. 2008.
 
 - 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,''' Proc. of ICASSP2008, pp.3957-3960, Las Vegas, NV, Mar. 2008. &ref(http://homepages.inf.ed.ac.uk/jyamagis/,,link);
 
 - Yoshihiko Nankaku, Kazuhiro Nakamura, ''Heiga Zen'', Keiichi Tokuda, '''Acoustic modeling with contextual additive structure for HMM-based speech recognition,''' Proc. of ICASSP2008, pp.4469-4472, Las Vegas, NV, Mar. 2008.
 
 - Junichi Yamagishi, ''Heiga Zen'', Yi-Jian Wu, Tomoki Toda, Keiichi Tokuda, '''HTS-2008: Yet another evaluation of speaker adaptive HMM-based speech synthesis system,''' Proc. of Blizzard Challenge Workshop 2008, Brisbane, Australia, Sept. 2008. &ref(http://festvox.org/blizzard/,,link);
 
 - Sayaka Shiota, Kei Hashimoto, ''Heiga Zen'', Yoshihiko Nankaku, Akinobu Lee, Keiichi Tokuda, '''Acoustic modeling based on model structure annealing for speech recognition,''' Proc. of Interspeech2008, pp.932-035, Brisbane, Australia, Sept. 2008.
 
 - Kei Hashimoto, ''Heiga Zen'', Yoshihiko Nankaku, Akinobu Lee, Keiichi Tokuda, '''Bayesian context clustering using cross valid prior distribution for HMM-Based speech recognition,''' Proc. of Interspeech2008, pp,936-939, Brisbane, Australia, Sept. 2008. &ref(http://www.sp.nitech.ac.jp/~bonanza/lists.html,,link);
 
 - ''Heiga Zen'', Yoshihiko Nankaku, Keiichi Tokuda, '''Probabilistic feature mapping based on trajectory HMMs,''' Proc. of Interspeech2008, pp.1068-1071, Brisbane, Australia, Sept. 2008. &ref(zen-icslp08.pdf,,paper); &ref(zen-icslp08-poster.pdf,,poster);
 
 - Simon King, Keiichi Tokuda, ''Heiga Zen'', Junichi Yamagishi, '''Unsupervised adaptation for HMM-based speech synthesis,''' Proc. of Interspeech2008, pp.1869-1872, Brisbane, Australia, Sept. 2008.
 
 - Zhi-Peng Yu, Yi-Jian Wu, ''Heiga Zen'', Yoshihiko Nankaku, Keiichi Tokuda, '''Analysis of stream-dependent tying structure for HMM-based speech synthesis,''' Proc. of ICSP2008, Beijing, China, Oct. 2008.
 - Zhi-Peng Yu, Yi-Jian Wu, ''Heiga Zen'', Yoshihiko Nankaku, Keiichi Tokuda, '''Analysis of stream-dependent tying structure for HMM-based speech synthesis,''' Proc. of ICSP2008, Beijing, P.R. China, Oct. 2008.
 
 ** 2007 [#n1133c96]
 - Alan W. Black, ''Heiga Zen'', Keiichi Tokuda, '''Statistical parametric speech synthesis,''' Proc. of ICASSP2007, pp.1229-1232, Honolulu, Hawaii, Apr. 2007.
 &ref(awb-icassp07.pdf,,paper); &ref(awb-icassp07-slide.pdf,,slide);
 
 - ''Heiga Zen'', Yoshihiko Nankaku, Keiichi Tokuda, '''Model-space MLLR for trajectory HMMs,''' Proc. of Interspeech2007, pp.2065-2068, Antwerp, Belgium, Aug. 2007. &ref(zen-euro07.pdf,,paper); &ref(zen-euro07-poster.pdf,,poster);
 
 - Ranniery Maia, Tomoki Toda, ''Heiga Zen'', Yoshihiko Nankaku, Keiichi Tokuda, '''A trainable excitation model for HMM-based speech synthesis,''' Proc. of Interspeech2007, pp.1909-1912, Antwerp, Belgium, Aug. 2007. &ref(http://www.slc.atr.jp/~rmaia/publications.html,,link);
 
 - ''Heiga Zen'', Takashi Nose, Junichi Yamagishi, Shinji Sako, Takashi Masuko, Alan W. Black, Keiichi Tokuda, '''The HMM-based speech synthesis system version 2.0,''' Proc. of ISCA SSW6, pp.294-299, Bonn, Germany, Aug. 2007. &ref(zen-ssw6.pdf,,paper); &ref(http://www.sp.nitech.ac.jp/~zen/publications/zen-ssw6-slide.pdf,,"slide (21 MBytes)");
 
 - Ranniery Maia, Tomoki Toda, ''Heiga Zen'', Yoshihiko Nankaku, Keiichi Tokuda, '''An excitation model for HMM-based speech synthesis based on residual modeling,''' Proc. of ISCA SSW6, pp.131-136, Bonn, Germany, Aug. 2007. &ref(http://www.slc.atr.jp/~rmaia/publications.html,,link);
 
 - 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 ISCA SSW6, pp.125-130, Bonn, Germany, Aug. 2007. &ref(http://homepages.inf.ed.ac.uk/jyamagis/,,link);
 
 - 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 BLZ3-2007, paper 008, Bonn, Germany, Aug. 2007. &ref(http://homepages.inf.ed.ac.uk/jyamagis/,,link);
 
 ** 2006 [#ld934236]
 - ''Heiga Zen'', Yoshihiko Nankaku, Keiichi Tokuda, Tadashi Kitamura, '''Estimating trajectory HMM parameters using Monte Carlo EM with Gibbs sampler,''' Proc. of ICASSP2006, pp.1173-1176, Toulouse, France, May 2006.
 &ref(zen-icassp06.pdf,,paper); &ref(zen-icassp06-poster.pdf,,poster);
 
 - Keiichiro Oura, ''Heiga Zen'', Yoshihiko Nankaku, Akinobu Lee, Keiichi Tokuda, '''Hidden semi-Markov model based speech recognition system using weighted finite-state transducer,''' Proc of ICASSP2006, pp.33-34, Toulouse, France, May 2006. &ref(http://www.sp.nitech.ac.jp/~uratec/index.php?HOME#ba2d35f3,,link);
 
 - ''Heiga Zen'', Yoshihiko Nankaku, Keiichi Tokuda, Tadashi Kitamura, '''Speaker adaptation of trajectory HMMs using feature-space MLLR,''' Proc. of Interspeech2006 (ICLSP), pp.2274-2277, Pittsburgh, PA, Sept. 2006. &ref(zen-icslp06.pdf,,paper); &ref(zen-icslp06-poster.pdf,,poster);
 - ''Heiga Zen'', Yoshihiko Nankaku, Keiichi Tokuda, Tadashi Kitamura, '''Speaker adaptation of trajectory HMMs using feature-space MLLR,''' Proc. of Interspeech2006 (ICLSP), pp.2274-2277, Pittsburgh, PA, U.S.A., Sept. 2006. &ref(zen-icslp06.pdf,,paper); &ref(zen-icslp06-poster.pdf,,poster);
 
 - Keijiro Saino, ''Heiga Zen'', Yoshihiko Nankaku, Akinobu Lee, Keiichi Tokuda, '''HMM-based singing voice synthesis system,''' Proc. of Interspeech2006 (ICSLP), pp.1141-1144, Pittsburgh, PA, Sept. 2006. &ref(http://www.sp.nitech.ac.jp/~k-saino/music/,,link);
 - Keijiro Saino, ''Heiga Zen'', Yoshihiko Nankaku, Akinobu Lee, Keiichi Tokuda, '''HMM-based singing voice synthesis system,''' Proc. of Interspeech2006 (ICSLP), pp.1141-1144, Pittsburgh, PA, U.S.A., Sept. 2006. &ref(http://www.sp.nitech.ac.jp/~k-saino/music/,,link);
 
 - ''Heiga Zen'', Tomoki Toda, Keiichi Tokuda,
 '''The Nitech-NAIST HMM-based speech synthesis system for the Blizzard Challenge 2006,''' Proc. of BLZ2-2006, Pittsburgh, PA, Sept. 2006.
 '''The Nitech-NAIST HMM-based speech synthesis system for the Blizzard Challenge 2006,''' Proc. of BLZ2-2006, Pittsburgh, PA, U.S.A., Sept. 2006.
 &ref(zen-blizzard06.pdf,,paper); &ref(zen-blizzard06-slide.pdf,,slide);
 &ref(http://www.festvox.org/blizzard/blizzard2006.html,,link);
 
 - Kei Hashimoto, ''Heiga Zen'', Yoshihiko Nankaku, Akinobu Lee, Keiichi Tokuda, '''Hyperparameter estimation for speech recognition based on variational Bayesian approach,''' Proc. ASA & ASJ Joint Meeting, pp.3042, Honolulu, Hawaii, Dec. 2006. &ref(http://www.sp.nitech.ac.jp/~bonanza/lists.html,,link);
 
 ** 2005 [#sc69a509]
 - Amaro Lima, ''Heiga Zen'', Yoshihiko Nankaku, Keiichi Tokuda, Tadashi Kitamura,
 '''Sparse KPCA for feature extraction in speech recognition,'''
 Proc. of ICASSP2005, vol.I, pp.353-356, Philadelphia, PA, Mar. 2005. &ref(http://www.sp.nitech.ac.jp/~amaro/links/links1.htm,,link);
 Proc. of ICASSP2005, vol.I, pp.353-356, Philadelphia, PA, U.S.A., Mar. 2005. &ref(http://www.sp.nitech.ac.jp/~amaro/links/links1.htm,,link);
 
 - ''Heiga Zen'', Tomoki Toda,
 '''An overview of Nitech HMM-based speech synthesis system for Blizzard Challenge 2005,'''
 Proc. of Interspeech2005 (Eurospeech), pp.93-96, Lisbon, Sept. 2005.
 &ref(zen-euro05.pdf,,paper); &ref(zen-euro05-slide.pdf,,slide);
 
 - Wael Hamza, Raimo Bakis, Zhang-Wei Shuang, ''Heiga Zen'',
 '''On building a concatenative speech synthesis system from the Blizzard Challenge speech databases,'''
 Proc. of Interspeech2005 (Eurospeech), pp.97-100, Lisbon, Sept. 2005. &ref(http://festvox.org/blizzard/blizzard2005.html,,link);
 
 
 ** 2004 [#t1b7f6e2]
 - ''Heiga Zen'', Keiichi Tokuda, Tadashi Kitamura,
 '''A Viterbi algorithm for a trajectory model derived from HMM with explicit relationship between static and dynamic features,'''
 Proc. of ICASSP 2004, pp.837-840, Montreal, May 2004.
 &ref(zen-icassp04.pdf,,paper); &ref(zen-icassp04-poster.pdf,,poster);
 
 - ''Heiga Zen'', Keiichi Tokuda, Tadashi Kitamura,
 '''An introduction of trajectory model into HMM-based speech synthesis,'''
 Proc. of 5th ISCA Speech Synthesis Workshop, Pittsburgh, June 2004.
 &ref(zen-ssw5.pdf,,paper); &ref(zen-ssw5-poster.pdf,,poster);
 
 - ''Heiga Zen'', Keiichi Tokuda, Takashi Masuko, Takao Kobayashi, Tadashi Kitamura,
 '''Hidden semi-Markov model based speech synthesis,'''
 Proc. of ICSLP 2004, vol.II, pp.1397-1400, Jeju, Oct. 2004.
 &ref(zen-icslp04.pdf,,paper); &ref(zen-icslp04-slide.pdf,,slide);
 
 - Yohei Itaya, ''Heiga Zen'', Yoshihiko Nankaku, Chiyomi Miyajima, Keiichi Tokuda, Tadashi Kitamura,
 '''Deterministic annealing EM algorithm in parameter estimation for acoustic model,''' Proc. of ICSLP 2004, vol.I, pp.433-436, Jeju, Oct. 2004. &ref(itaya-icslp04.pdf,,paper);
 
 - Ryosuke Tsuzuki, ''Heiga Zen'', Keiichi Tokuda, Tadashi Kitamura, Murtaza Bulut, Shrikanth S. Narayanan,
 '''Constructing emotional speech synthesizers with limited speech database,'''
 Proc. of ICSLP 2004, vol.II, pp.1185-1188, Jeju, Oct. 2004.
 &ref(ryosuke-icslp04.pdf,,paper);
 
 - Keiichi Tokuda, ''Heiga Zen'', Tadashi Kitamura,
 '''Reformulating the HMM as a trajectory model,'''
 Proc. of Beyond HMM -- Workshop on statistical modeling approach for speech recognition, Kyoto, Dec. 2004.
 &ref(tokuda-beyondHMM.pdf,,paper); &ref(tokuda-beyondHMM-poster.pdf,,poster);
 
 ** 2003 [#n4c97e2a]
 - Hiroyuki Suzuki, ''Heiga Zen'', Yoshihiko Nankaku, Chiyomi Miyajima, Keiichi Tokuda, Tadashi Kitamura,
 '''Speech recognition using voice-characteristic dependent acoustic model,'''
 Proc. of ICASSP 2003, vol.1, pp.740-743, Apr. 2003. &ref(suzuki-icassp03.pdf,,paper);
 
 - Takahiro Hoshiya, Shinji Sako, ''Heiga Zen'', Keiichi Tokuda, Takashi Masuko, Takao Kobayashi, Tadashi Kitamura,
 '''Improving the performance of HMM-based very low bitrate speech coding,'''
 Proc. of ICASSP 2003, vol.1, pp.800-803, Apr. 2003. &ref(hoshiya-icassp03.pdf,,paper);
 
 - ''Heiga Zen'', Keiichi Tokuda, Tadashi Kitamura,
 '''Decision tree based simultaneous clustering of phonetic contexts, dimensions, and state positions for acoustic modeling,'''
 Proc. of Eurospeech 2003, pp.3189-3192, Sept. 2003.
 &ref(zen-euro03.pdf,,paper); &ref(zen-euro03-poster.pdf,,poster);
 
 - Keiichi Tokuda, ''Heiga Zen'', Tadashi Kitamura,
 '''Trajectory modeling based on HMMs with the explicit relationship between static and dynamic features,'''
 Proc. of Eurospeech 2003, pp.865-868, Sept. 2003. &ref(tokuda-euro03.pdf,,paper);
 
 - Ranniery S. Maia, ''Heiga Zen'', Keiichi Tokuda, Tadashi Kitamura,
 '''Towards the development of a Brazilian Portuguese text-to-speech system based on HMM,'''
 Proc. of Eurospeech 2003, pp.2465-2468, Sept. 2003. &ref(http://www.sp.nitech.ac.jp/~maia/eurospeech2003_demo/demo.html,,link);
 
 - Amaro Lima, ''Heiga Zen'', Yoshihiko Nankaku, Chiyomi Miyajima, Keiichi Tokuda, Tadashi Kitamura,
 '''On the use of kernel PCA for feature extraction in speech recognition,'''
 Proc. of Eurospeech 2003, pp.2625-2628, Sept. 2003. &ref(http://www.sp.nitech.ac.jp/~amaro/links/links1.htm,,link);
 
 ** 2002 [#f13f509a]
 - ''Heiga Zen'', Keiichi Tokuda, Tadashi Kitamura,
 '''Decision tree distribution tying based on a dimensional split technique,'''
 Proc. of ICSLP 2002, pp.1257-1260, Sept. 2002. &ref(zen-icslp02.pdf,,paper); &ref(zen-icslp02-slide.pdf,,slide);
 
 - Keiichi Tokuda, ''Heiga Zen'', Alan W. Black,
 '''An HMM-based speech synthesis system applied to English,'''
 Proc. of IEEE Speech Synthesis Workshop, Sept. 2002. &ref(http://hts.sp.nitech.ac.jp/?Publications#l9b04238,,link);

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