Keiichiro Oura

According to our database, Keiichiro Oura authored at least 69 papers between 2006 and 2023.

Collaborative distances:

• Dijkstra number of four.
• Erdős number of four.

2023

SPTK4: An Open-Source Software Toolkit for Speech Signal Processing.

Takenori Yoshimura, Takato Fujimoto, Keiichiro Oura, Keiichi Tokuda

Proceedings of the 12th ISCA Speech Synthesis Workshop, 2023

Embedding a Differentiable Mel-Cepstral Synthesis Filter to a Neural Speech Synthesis System.

Takenori Yoshimura, Shinji Takaki, Kazuhiro Nakamura, Keiichiro Oura, Yukiya Hono, Kei Hashimoto, Yoshihiko Nankaku, Keiichi Tokuda

Proceedings of the IEEE International Conference on Acoustics, 2023

2021

Sinsy: A Deep Neural Network-Based Singing Voice Synthesis System.

Yukiya Hono, Kei Hashimoto, Keiichiro Oura, Yoshihiko Nankaku, Keiichi Tokuda

IEEE ACM Trans. Audio Speech Lang. Process., 2021

PeriodNet: A Non-Autoregressive Raw Waveform Generative Model With a Structure Separating Periodic and Aperiodic Components.

Yukiya Hono, Shinji Takaki, Kei Hashimoto, Keiichiro Oura, Yoshihiko Nankaku, Keiichi Tokuda

IEEE Access, 2021

Periodnet: A Non-Autoregressive Waveform Generation Model with a Structure Separating Periodic and Aperiodic Components.

Yukiya Hono, Shinji Takaki, Kei Hashimoto, Keiichiro Oura, Yoshihiko Nankaku, Keiichi Tokuda

Proceedings of the IEEE International Conference on Acoustics, 2021

2020

Hierarchical Multi-Grained Generative Model for Expressive Speech Synthesis.

Yukiya Hono, Kazuna Tsuboi, Kei Sawada, Kei Hashimoto, Keiichiro Oura, Yoshihiko Nankaku, Keiichi Tokuda

Proceedings of the 21st Annual Conference of the International Speech Communication Association, 2020

Fast and High-Quality Singing Voice Synthesis System Based on Convolutional Neural Networks.

Kazuhiro Nakamura, Shinji Takaki, Kei Hashimoto, Keiichiro Oura, Yoshihiko Nankaku, Keiichi Tokuda

Proceedings of the 2020 IEEE International Conference on Acoustics, 2020

Semi-Supervised Learning Based on Hierarchical Generative Models for End-to-End Speech Synthesis.

Takato Fujimoto, Shinji Takaki, Kei Hashimoto, Keiichiro Oura, Yoshihiko Nankaku, Keiichi Tokuda

Proceedings of the 2020 IEEE International Conference on Acoustics, 2020

2019

Singing voice synthesis based on convolutional neural networks.

Kazuhiro Nakamura, Kei Hashimoto, Keiichiro Oura, Yoshihiko Nankaku, Keiichi Tokuda

CoRR, 2019

Low computational cost speech synthesis based on deep neural networks using hidden semi-Markov model structures.

Motoki Shimada, Kei Hashimoto, Keiichiro Oura, Yoshihiko Nankaku, Keiichi Tokuda

Proceedings of the 10th ISCA Speech Synthesis Workshop, 2019

Deep neural network based real-time speech vocoder with periodic and aperiodic inputs.

Keiichiro Oura, Kazuhiro Nakamura, Kei Hashimoto, Yoshihiko Nankaku, Keiichi Tokuda

Proceedings of the 10th ISCA Speech Synthesis Workshop, 2019

Impacts of input linguistic feature representation on Japanese end-to-end speech synthesis.

Takato Fujimoto, Kei Hashimoto, Keiichiro Oura, Yoshihiko Nankaku, Keiichi Tokuda

Proceedings of the 10th ISCA Speech Synthesis Workshop, 2019

Speaker-dependent Wavenet-based Delay-free Adpcm Speech Coding.

Takenori Yoshimura, Kei Hashimoto, Keiichiro Oura, Yoshihiko Nankaku, Keiichi Tokuda

Proceedings of the IEEE International Conference on Acoustics, 2019

Singing Voice Synthesis Based on Generative Adversarial Networks.

Yukiya Hono, Kei Hashimoto, Keiichiro Oura, Yoshihiko Nankaku, Keiichi Tokuda

Proceedings of the IEEE International Conference on Acoustics, 2019

2018

Mel-Cepstrum-Based Quantization Noise Shaping Applied to Neural-Network-Based Speech Waveform Synthesis.

Takenori Yoshimura, Kei Hashimoto, Keiichiro Oura, Yoshihiko Nankaku, Keiichi Tokuda

IEEE ACM Trans. Audio Speech Lang. Process., 2018

WaveNet-Based Zero-Delay Lossless Speech Coding.

Takenori Yoshimura, Kei Hashimoto, Keiichiro Oura, Yoshihiko Nankaku, Keiichi Tokuda

Proceedings of the 2018 IEEE Spoken Language Technology Workshop, 2018

Statistical Voice Conversion Based on Wavenet.

Jumpei Niwa, Takenori Yoshimura, Kei Hashimoto, Keiichiro Oura, Yoshihiko Nankaku, Keiichi Tokuda

Proceedings of the 2018 IEEE International Conference on Acoustics, 2018

The NITech text-to-speech system for the Blizzard Challenge 2018.

Kei Sawada, Takenori Yoshimura, Kei Hashimoto, Keiichiro Oura, Yoshihiko Nankaku, Keiichi Tokuda

Proceedings of the Blizzard Challenge 2018, Hyderabad, India, September 8, 2018, 2018

Discriminative Feature Extraction Based on Sequential Variational Autoencoder for Speaker Recognition.

Takenori Yoshimura, Natsumi Koike, Kei Hashimoto, Keiichiro Oura, Yoshihiko Nankaku, Keiichi Tokuda

Proceedings of the Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, 2018

Singing Voice Conversion Using Posted Waveform Data on Music Social Media.

Koki Senda, Yukiya Hono, Kei Sawada, Kei Hashimoto, Keiichiro Oura, Yoshihiko Nankaku, Keiichi Tokuda

Proceedings of the Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, 2018

Speaker Adaptation for Speech Synthesis Based on Deep Neural Networks Using Hidden Semi-Markov Model Structures.

Kento Nakao, Kei Hashimoto, Keiichiro Oura, Yoshihiko Nankaku, Keiichi Tokuda

Proceedings of the Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, 2018

Image Recognition Based on Convolutional Neural Networks Using Features Generated from Separable Lattice Hidden Markov Models.

Takayuki Kasugai, Yoshinari Tsuzuki, Kei Sawada, Kei Hashimoto, Keiichiro Oura, Yoshihiko Nankaku, Keiichi Tokuda

Proceedings of the Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, 2018

Recent Development of the DNN-based Singing Voice Synthesis System - Sinsy.

Yukiya Hono, Shumma Murata, Kazuhiro Nakamura, Kei Hashimoto, Keiichiro Oura, Yoshihiko Nankaku, Keiichi Tokuda

Proceedings of the Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, 2018

Speech Synthesis Using WaveNet Vocoder Based on Periodic/Aperiodic Decomposition.

Takato Fujimoto, Takenori Yoshimura, Kei Hashimoto, Keiichiro Oura, Yoshihiko Nankaku, Keiichi Tokuda

Proceedings of the Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, 2018

2017

Simultaneous Optimization of Multiple Tree-Based Factor Analyzed HMM for Speech Synthesis.

Takenori Yoshimura, Kei Hashimoto, Keiichiro Oura, Yoshihiko Nankaku, Keiichi Tokuda

IEEE ACM Trans. Audio Speech Lang. Process., 2017

The NITech text-to-speech system for the Blizzard Challenge 2017.

Kei Sawada, Kei Hashimoto, Keiichiro Oura, Keiichi Tokuda

Proceedings of the Blizzard Challenge 2017, Stockholm, Sweden, August 25, 2017, 2017

Generalization of Thai tone contour in HMM-based speech synthesis.

Anocha Rugchatjaroen, Sittipong Saychum, Keiichiro Oura, Keiichi Tokuda

Proceedings of the 2017 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, 2017

User Generated Dialogue Systems: uDialogue.

Keiichi Tokuda, Akinobu Lee, Yoshihiko Nankaku, Keiichiro Oura, Kei Hashimoto, Daisuke Yamamoto, Ichi Takumi, Takahiro Uchiya, Shuhei Tsutsumi, Steve Renals, Junichi Yamagishi

Proceedings of the Human-Harmonized Information Technology, Volume 2, 2017

2016

Temporal modeling in neural network based statistical parametric speech synthesis.

Keiichi Tokuda, Kei Hashimoto, Keiichiro Oura, Yoshihiko Nankaku

Proceedings of the 9th ISCA Speech Synthesis Workshop, 2016

Singing Voice Synthesis Based on Deep Neural Networks.

Masanari Nishimura, Kei Hashimoto, Keiichiro Oura, Yoshihiko Nankaku, Keiichi Tokuda

Proceedings of the 17th Annual Conference of the International Speech Communication Association, 2016

Voice Conversion Based on Trajectory Model Training of Neural Networks Considering Global Variance.

Naoki Hosaka, Kei Hashimoto, Keiichiro Oura, Yoshihiko Nankaku, Keiichi Tokuda

Proceedings of the 17th Annual Conference of the International Speech Communication Association, 2016

Redefining the Linguistic Context Feature Set for HMM and DNN TTS Through Position and Parsing.

Rasmus Dall, Kei Hashimoto, Keiichiro Oura, Yoshihiko Nankaku, Keiichi Tokuda

Proceedings of the 17th Annual Conference of the International Speech Communication Association, 2016

Trajectory training considering global variance for speech synthesis based on neural networks.

Kei Hashimoto, Keiichiro Oura, Yoshihiko Nankaku, Keiichi Tokuda

Proceedings of the 2016 IEEE International Conference on Acoustics, 2016

The NITech text-to-speech system for the Blizzard Challenge 2016.

Kei Sawada, Chiaki Asai, Kei Hashimoto, Keiichiro Oura, Keiichi Tokuda

Proceedings of the Blizzard Challenge 2016, Cuppertino, CA, USA, September 16, 2016, 2016

2015

Using speaker adaptive training to realize Mandarin-Tibetan cross-lingual speech synthesis.

Hongwu Yang, Keiichiro Oura, Haiyan Wang, Zhenye Gan, Keiichi Tokuda

Multim. Tools Appl., 2015

The effect of neural networks in statistical parametric speech synthesis.

Kei Hashimoto, Keiichiro Oura, Yoshihiko Nankaku, Keiichi Tokuda

Proceedings of the 2015 IEEE International Conference on Acoustics, 2015

The NITECH HMM-based text-to-speech system for the Blizzard Challenge 2015.

Kei Sawada, Kei Hashimoto, Keiichiro Oura, Keiichi Tokuda

Proceedings of the Blizzard Challenge 2015, 2015

2014

A mel-cepstral analysis technique restoring high frequency components from low-sampling-rate speech.

Kazuhiro Nakamura, Kei Hashimoto, Keiichiro Oura, Yoshihiko Nankaku, Keiichi Tokuda

Proceedings of the 15th Annual Conference of the International Speech Communication Association, 2014

Integration of speaker and pitch adaptive training for HMM-based singing voice synthesis.

Kanako Shirota, Kazuhiro Nakamura, Kei Hashimoto, Keiichiro Oura, Yoshihiko Nankaku, Keiichi Tokuda

Proceedings of the IEEE International Conference on Acoustics, 2014

HMM-Based singing voice synthesis and its application to Japanese and English.

Kazuhiro Nakamura, Keiichiro Oura, Yoshihiko Nankaku, Keiichi Tokuda

Proceedings of the IEEE International Conference on Acoustics, 2014

Voice interaction system with 3D-CG virtual agent for stand-alone smartphones.

Daisuke Yamamoto, Keiichiro Oura, Ryota Nishimura, Takahiro Uchiya, Akinobu Lee, Ichi Takumi, Keiichi Tokuda

Proceedings of the second international conference on Human-agent interaction, 2014

Overview of NITECH HMM-based text-to-speech system for Blizzard Challenge 2014.

Kei Sawada, Shinji Takaki, Kei Hashimoto, Keiichiro Oura, Keiichi Tokuda

Proceedings of the Blizzard Challenge 2014, Singapore, Singapore, September 19, 2014, 2014

2013

Speech Synthesis Based on Hidden Markov Models.

Keiichi Tokuda, Yoshihiko Nankaku, Tomoki Toda, Heiga Zen, Junichi Yamagishi, Keiichiro Oura

Proc. IEEE, 2013

Personalising speech-to-speech translation: Unsupervised cross-lingual speaker adaptation for HMM-based speech synthesis.

John Dines, Hui Liang, Lakshmi Babu Saheer, Matthew Gibson, William Byrne, Keiichiro Oura, Keiichi Tokuda, Junichi Yamagishi, Simon King, Mirjam Wester, Teemu Hirsimäki, Reima Karhila, Mikko Kurimo

Comput. Speech Lang., 2013

Cross-lingual speaker adaptation based on factor analysis using bilingual speech data for HMM-based speech synthesis.

Takenori Yoshimura, Kei Hashimoto, Keiichiro Oura, Yoshihiko Nankaku, Keiichi Tokuda

Proceedings of the Eighth ISCA Tutorial and Research Workshop on Speech Synthesis, 2013

Real-time control of expressive speech synthesis using kinect body tracking.

Christophe Veaux, Maria Astrinaki, Keiichiro Oura, Robert A. J. Clark, Junichi Yamagishi

Proceedings of the Eighth ISCA Tutorial and Research Workshop on Speech Synthesis, 2013

Mmdagent - A fully open-source toolkit for voice interaction systems.

Akinobu Lee, Keiichiro Oura, Keiichi Tokuda

Proceedings of the IEEE International Conference on Acoustics, 2013

Overview of NITECH HMM-based speech synthesis system for Blizzard Challenge 2013.

Shinji Takaki, Kei Sawada, Kei Hashimoto, Keiichiro Oura, Keiichi Tokuda

Proceedings of the Blizzard Challenge 2013, 2013

Realizing Tibetan speech synthesis by speaker adaptive training.

Hongwu Yang, Keiichiro Oura, Zhenye Gan, Keiichi Tokuda

Proceedings of the Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, 2013

2012

Analysis of unsupervised cross-lingual speaker adaptation for HMM-based speech synthesis using KLD-based transform mapping.

Keiichiro Oura, Junichi Yamagishi, Mirjam Wester, Simon King, Keiichi Tokuda

Speech Commun., 2012

Pitch adaptive training for hmm-based singing voice synthesis.

Keiichiro Oura, Ayami Mase, Yoshihiko Nankaku, Keiichi Tokuda

Proceedings of the 2012 IEEE International Conference on Acoustics, 2012

Overview of NIT HMM-based speech synthesis system for Blizzard Challenge 2012.

Shinji Takaki, Kei Sawada, Kei Hashimoto, Keiichiro Oura, Keiichi Tokuda

Proceedings of the Blizzard Challenge 2012, Portland, OR, USA, September 14, 2012, 2012

2011

Large-Scale Subjective Evaluations of Speech Rate Control Methods for HMM-Based Speech Synthesizers.

Tsuneo Kato, Makoto Yamada, Nobuyuki Nishizawa, Keiichiro Oura, Keiichi Tokuda

Proceedings of the 12th Annual Conference of the International Speech Communication Association, 2011

An optimization algorithm of independent mean and variance parameter tying structures for HMM-based speech synthesis.

Shinji Takaki, Keiichiro Oura, Yoshihiko Nankaku, Keiichi Tokuda

Proceedings of the IEEE International Conference on Acoustics, 2011

Overview of NIT HMM-based speech synthesis system for Blizzard Challenge 2011.

Kei Hashimoto, Shinji Takaki, Keiichiro Oura, Keiichi Tokuda

Proceedings of the Blizzard Challenge 2011, Turin, Italy, September 2, 2011, 2011

2010

Thousands of Voices for HMM-Based Speech Synthesis-Analysis and Application of TTS Systems Built on Various ASR Corpora.

Junichi Yamagishi, Bela Usabaev, Simon King, Oliver Watts, John Dines, Jilei Tian, Yong Guan, Rile Hu, Keiichiro Oura, Yi-Jian Wu, Keiichi Tokuda, Reima Karhila, Mikko Kurimo

IEEE Trans. Speech Audio Process., 2010

A Covariance-Tying Technique for HMM-Based Speech Synthesis.

Keiichiro Oura, Heiga Zen, Yoshihiko Nankaku, Akinobu Lee, Keiichi Tokuda

IEICE Trans. Inf. Syst., 2010

Speaker adaptation and the evaluation of speaker similarity in the EMIME speech-to-speech translation project.

Mirjam Wester, John Dines, Matthew Gibson, Hui Liang, Yi-Jian Wu, Lakshmi Babu Saheer, Simon King, Keiichiro Oura, Philip N. Garner, William Byrne, Yong Guan, Teemu Hirsimäki, Reima Karhila, Mikko Kurimo, Matt Shannon, Sayaka Shiota, Jilei Tian, Keiichi Tokuda, Junichi Yamagishi

Proceedings of the Seventh ISCA Tutorial and Research Workshop on Speech Synthesis, 2010

Recent development of the HMM-based singing voice synthesis system - Sinsy.

Keiichiro Oura, Ayami Mase, Tomohiko Yamada, Satoru Muto, Yoshihiko Nankaku, Keiichi Tokuda

Proceedings of the Seventh ISCA Tutorial and Research Workshop on Speech Synthesis, 2010

HMM-based singing voice synthesis system using pitch-shifted pseudo training data.

Ayami Mase, Keiichiro Oura, Yoshihiko Nankaku, Keiichi Tokuda

Proceedings of the 11th Annual Conference of the International Speech Communication Association, 2010

Unsupervised cross-lingual speaker adaptation for HMM-based speech synthesis.

Keiichiro Oura, Keiichi Tokuda, Junichi Yamagishi, Simon King, Mirjam Wester

Proceedings of the IEEE International Conference on Acoustics, 2010

Overview of NIT HMM-based speech synthesis system for Blizzard Challenge 2010.

Keiichiro Oura, Kei Hashimoto, Sayaka Shiota, Keiichi Tokuda

Proceedings of the Blizzard Challenge 2010, Kansai Science City, Japan, September 25, 2010, 2010

Personalising Speech-To-Speech Translation in the EMIME Project.

Mikko Kurimo, William Byrne, John Dines, Philip N. Garner, Matthew Gibson, Yong Guan, Teemu Hirsimäki, Reima Karhila, Simon King, Hui Liang, Keiichiro Oura, Lakshmi Babu Saheer, Matt Shannon, Sayaka Shiota, Jilei Tian

Proceedings of the ACL 2010, 2010

2009

Thousands of voices for HMM-based speech synthesis.

Junichi Yamagishi, Bela Usabaev, Simon King, Oliver Watts, John Dines, Jilei Tian, Rile Hu, Yong Guan, Keiichiro Oura, Keiichi Tokuda, Reima Karhila, Mikko Kurimo

Proceedings of the 10th Annual Conference of the International Speech Communication Association, 2009

Tying covariance matrices to reduce the footprint of HMM-based speech synthesis systems.

Keiichiro Oura, Heiga Zen, Yoshihiko Nankaku, Akinobu Lee, Keiichi Tokuda

Proceedings of the 10th Annual Conference of the International Speech Communication Association, 2009

Overview of NIT HMM-based speech synthesis system for Blizzard Challenge 2009.

Keiichiro Oura, Yi-Jian Wu, Keiichi Tokuda

Proceedings of the Blizzard Challenge 2009, Edinburgh, Scotland, UK, September 4, 2009, 2009

2008

A Fully Consistent Hidden Semi-Markov Model-Based Speech Recognition System.

Keiichiro Oura, Heiga Zen, Yoshihiko Nankaku, Akinobu Lee, Keiichi Tokuda

IEICE Trans. Inf. Syst., 2008

Simultaneous Acoustic, Prosodic, and Phrasing Model Training for TTs Conversion Systems.

Keiichiro Oura, Yoshihiko Nankaku, Tomoki Toda, Keiichi Tokuda, Ranniery Maia, Shinsuke Sakai, Satoshi Nakamura

Proceedings of the 6th International Symposium on Chinese Spoken Language Processing, 2008

2006

Hidden Semi-Markov Model Based Speech Recognition System using Weighted Finite-State Transducer.

Keiichiro Oura, Heiga Zen, Yoshihiko Nankaku, Akinobu Lee, Keiichi Tokuda

Proceedings of the 2006 IEEE International Conference on Acoustics Speech and Signal Processing, 2006