Hirofumi Yamamoto

According to our database, Hirofumi Yamamoto authored at least 58 papers between 1996 and 2020.

Collaborative distances:

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

2020

Free-Flow Tunnel Inspection Support Devices Aiming at Labor Saving of Visual Checking.

Kazunori Hosotani, Hirofumi Yamamoto

J. Robotics Mechatronics, 2020

2019

Forecasting Crypto-Asset Price Using Influencer Tweets.

Hirofumi Yamamoto, Hiroki Sakaji, Hiroyasu Matsushima, Yuki Yamashita, Kyohei Osawa, Kiyoshi Izumi, Takashi Shimada

Proceedings of the Advanced Information Networking and Applications, 2019

2016

Lifetime estimation of SiC MOSFETs under high temperature reverse bias test.

Kosuke Uchida, Toru Hiyoshi, Taro Nishiguchi, Hirofumi Yamamoto, Masaki Furumai, Takashi Tsuno, Yasuki Mikamura

Microelectron. Reliab., 2016

2013

A 10-bit fast lock all-digital data recovery with CR oscillator reference for automotive network.

Hironobu Akita, Takahisa Yoshimoto, Hirofumi Yamamoto, Nobuaki Matsudaira, Shigeki Ohtsuka, Shinichirou Taguchi

Proceedings of the 2013 IEEE International Symposium on Circuits and Systems (ISCAS2013), 2013

2010

Constraining a Generative Word Alignment Model with Discriminative Output.

Chooi-Ling Goh, Taro Watanabe, Hirofumi Yamamoto, Eiichiro Sumita

IEICE Trans. Inf. Syst., 2010

2009

Training Set Selection for Building Compact and Efficient Language Models.

Keiji Yasuda, Hirofumi Yamamoto, Eiichiro Sumita

IEICE Trans. Inf. Syst., 2009

Imposing Constraints from the Source Tree on ITG Constraints for SMT.

Hirofumi Yamamoto, Hideo Okuma, Eiichiro Sumita

IEICE Trans. Inf. Syst., 2009

A Reordering Model Using a Source-Side Parse-Tree for Statistical Machine Translation.

Kei Hashimoto, Hirofumi Yamamoto, Hideo Okuma, Eiichiro Sumita, Keiichi Tokuda

IEICE Trans. Inf. Syst., 2009

On the Importance of Pivot Language Selection for Statistical Machine Translation.

Michael Paul, Hirofumi Yamamoto, Eiichiro Sumita, Satoshi Nakamura

Proceedings of the Human Language Technologies: Conference of the North American Chapter of the Association of Computational Linguistics, Proceedings, May 31, 2009

Two methods for stabilizing MERT.

Masao Utiyama, Hirofumi Yamamoto, Eiichiro Sumita

Proceedings of the 6th International Workshop on Spoken Language Translation: Evaluation Campaign@IWSLT 2009, 2009

Two methods for stabilizing MERT: NICT at IWSLT 2009.

Masao Utiyama, Hirofumi Yamamoto, Eiichiro Sumita

Proceedings of the 2009 International Workshop on Spoken Language Translation, 2009

2008

Bilingual Cluster Based Models for Statistical Machine Translation.

Hirofumi Yamamoto, Eiichiro Sumita

IEICE Trans. Inf. Syst., 2008

Introducing a Translation Dictionary into Phrase-Based SMT.

Hideo Okuma, Hirofumi Yamamoto, Eiichiro Sumita

IEICE Trans. Inf. Syst., 2008

System Description of NiCT-ATR SMT for NTCIR-7.

Keiji Yasuda, Andrew M. Finch, Hideo Okuma, Masao Utiyama, Hirofumi Yamamoto, Eiichiro Sumita

Proceedings of the 7th NTCIR Workshop Meeting on Evaluation of Information Access Technologies: Information Retrieval, 2008

The NICT/ATR speech translation system for IWSLT 2008.

Masao Utiyama, Andrew M. Finch, Hideo Okuma, Michael Paul, Hailong Cao, Hirofumi Yamamoto, Keiji Yasuda, Eiichiro Sumita

Proceedings of the 2008 International Workshop on Spoken Language Translation, 2008

Utilization of Huge Written Text Corpora for Conversational Speech Recognition.

Xinhui Hu, Hirofumi Yamamoto, Jinsong Zhang, Keiji Yasuda, Youzheng Wu, Hideki Kashioka

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

Method of Selecting Training Data to Build a Compact and Efficient Translation Model.

Keiji Yasuda, Ruiqiang Zhang, Hirofumi Yamamoto, Eiichiro Sumita

Proceedings of the Third International Joint Conference on Natural Language Processing, 2008

The Application of FRD with Avalanche Capability for Improvement of Power Conversion Efficiency in Output Rectifier and PFC.

Saburo Okumura, Hirofumi Yamamoto, Yoshikazu Nishimura, Hironori Hiraoka, Kenzo Danjo, Hiroki Morimoto

Proceedings of the Industry Applications Society Annual Meeting, 2008

Objective evaluation of second language learner²s translation proficiency using statistical translation measures.

Hajime Tsubaki, Keiji Yasuda, Hirofumi Yamamoto, Yoshinori Sagisaka

Proceedings of the ISCA Tutorial and Research Workshop on Experimental Linguistics, 2008

Multilingual Mobile-Phone Translation Services for World Travelers.

Michael Paul, Hideo Okuma, Hirofumi Yamamoto, Eiichiro Sumita, Shigeki Matsuda, Tohru Shimizu, Satoshi Nakamura

Proceedings of the COLING 2008, 2008

2007

The NICT/ATR speech translation system for IWSLT 2007.

Andrew M. Finch, Etienne Denoual, Hideo Okuma, Michael Paul, Hirofumi Yamamoto, Keiji Yasuda, Ruiqiang Zhang, Eiichiro Sumita

Proceedings of the 2007 International Workshop on Spoken Language Translation, 2007

2006

The ATR multilingual speech-to-speech translation system.

Satoshi Nakamura, Konstantin Markov, Hiromi Nakaiwa, Gen-ichiro Kikui, Hisashi Kawai, Takatoshi Jitsuhiro, Jinsong Zhang, Hirofumi Yamamoto, Eiichiro Sumita, Seiichi Yamamoto

IEEE Trans. Speech Audio Process., 2006

The niCT-ATR statistical machine translation system for the IWSLT 2006 evaluation.

Ruiqiang Zhang, Hirofumi Yamamoto, Michael Paul, Hideo Okuma, Keiji Yasuda, Yves Lepage, Etienne Denoual, Daichi Mochihashi, Andrew M. Finch, Eiichiro Sumita

Proceedings of the 2006 International Workshop on Spoken Language Translation, 2006

Speech recognition of foreign out-of-vocabulary words using a hierarchical language model.

Hirofumi Yamamoto, Gen-ichiro Kikui, Satoshi Nakamura, Yoshinori Sagisaka

Proceedings of the Ninth International Conference on Spoken Language Processing, 2006

Language modeling of Chinese personal names based on character units for continuous Chinese speech recognition.

Xinhui Hu, Hirofumi Yamamoto, Gen-ichiro Kikui, Yoshinori Sagisaka

Proceedings of the Ninth International Conference on Spoken Language Processing, 2006

2005

Example-based machine translation using efficient sentence retrieval based on edit-distance.

Takao Doi, Hirofumi Yamamoto, Eiichiro Sumita

ACM Trans. Asian Lang. Inf. Process., 2005

Graph-based Retrieval for Example-based Machine Translation Using Edit-distance.

Takao Doi, Hirofumi Yamamoto, Eiichiro Sumita

Proceedings of the Workshop on example-based machine translation@MTSummit 2005, 2005

A decoding algorithm for word lattice translation in speech translation.

Ruiqiang Zhang, Gen-ichiro Kikui, Hirofumi Yamamoto, Wai-Kit Lo

Proceedings of the 2005 International Workshop on Spoken Language Translation, 2005

Using multiple recognition hypotheses to improve speech translation.

Ruiqiang Zhang, Gen-ichiro Kikui, Hirofumi Yamamoto

Proceedings of the 2005 International Workshop on Spoken Language Translation, 2005

Speech recognition of a named entity.

Tatsuhiko Tomita, Yoshiyuki Okimoto, Hirofumi Yamamoto, Yoshinori Sagisaka

Proceedings of the 2005 IEEE International Conference on Acoustics, 2005

2004

Multi-lingual speech recognition system for speech-to-speech translation.

Satoshi Nakamura, Konstantin Markov, Takatoshi Jitsuhiro, Jinsong Zhang, Hirofumi Yamamoto, Gen-ichiro Kikui

Proceedings of the 2004 International Workshop on Spoken Language Translation, 2004

Improved spoken language translation using n-best speech recognition hypotheses.

Ruiqiang Zhang, Gen-ichiro Kikui, Hirofumi Yamamoto, Frank K. Soong, Taro Watanabe, Eiichiro Sumita, Wai Kit Lo

Proceedings of the 8th International Conference on Spoken Language Processing, 2004

Mis-recognized utterance detection using hierarchical language model.

Hirofumi Yamamoto, Gen-ichiro Kikui, Yoshinori Sagisaka

Proceedings of the 8th International Conference on Spoken Language Processing, 2004

A Unified Approach in Speech-to-Speech Translation: Integrating Features of Speech recognition and Machine Translation.

Ruiqiang Zhang, Gen-ichiro Kikui, Hirofumi Yamamoto, Frank K. Soong, Taro Watanabe, Wai Kit Lo

Proceedings of the COLING 2004, 2004

2003

Multi-class composite N-gram language model.

Hirofumi Yamamoto, Shuntaro Isogai, Yoshinori Sagisaka

Speech Commun., 2003

Multiclass composite N-gram language model based on connection direction.

Hirofumi Yamamoto, Yoshinori Sagisaka

Syst. Comput. Jpn., 2003

Adaptation Using Out-of-Domain Corpus within EBMT.

Takao Doi, Eiichiro Sumita, Hirofumi Yamamoto

Proceedings of the Human Language Technology Conference of the North American Chapter of the Association for Computational Linguistics, 2003

Word class modeling for speech recognition with out-of-task words using a hierarchical language model.

Yoshihiko Ogawa, Hirofumi Yamamoto, Yoshinori Sagisaka, Gen-ichiro Kikui

Proceedings of the 8th European Conference on Speech Communication and Technology, EUROSPEECH 2003, 2003

Mis-recognized utterance detection using multiple language models generated by clustered sentences.

Katsuhisa Fujinaga, Hiroaki Kokubo, Hirofumi Yamamoto, Gen-ichiro Kikui, Hiroshi Shimodaira

Proceedings of the 8th European Conference on Speech Communication and Technology, EUROSPEECH 2003, 2003

2002

Toward a Broad-coverage Bilingual Corpus for Speech Translation of Travel Conversations in the Real World.

Toshiyuki Takezawa, Eiichiro Sumita, Fumiaki Sugaya, Hirofumi Yamamoto, Seiichi Yamamoto

Proceedings of the Third International Conference on Language Resources and Evaluation, 2002

System-Level Design of IEEE1394 Bus Segment Bridge.

Takao Onoye, Yukihiro Nakamura, Atsuhito Shigiya, Keishi Chikamura, Kosuke Tsujino, Tomonori Izumi, Hirofumi Yamamoto

Proceedings of the 15th International Symposium on System Synthesis (ISSS 2002), 2002

Language Model Adaptation with Additional Text Generated by Machine Translation.

Hideharu Nakajima, Hirofumi Yamamoto, Taro Watanabe

Proceedings of the 19th International Conference on Computational Linguistics, 2002

Finding Translation Pairs from English-Japanese Untokenized Aligned Corpora.

Gen-ichiro Kikui, Hirofumi Yamamoto

Proceedings of the Workshop on Speech-to-Speech Translation: Algorithms and Systems@ACL 2002, 2002

2001

Structured language model for class identification of out-of-vocabulary words arising from multiple wordclasses.

Shigehiko Onishi, Hirofumi Yamamoto, Yoshinori Sagisaka

Proceedings of the EUROSPEECH 2001 Scandinavia, 2001

New language models using phrase structures extracted from parse trees.

Takatoshi Jitsuhiro, Hirofumi Yamamoto, Setsuo Yamada, Yoshinori Sagisaka

Proceedings of the EUROSPEECH 2001 Scandinavia, 2001

Multi-class composite n-gram language model using multiple word clusters and word successions.

Shuntaro Isogai, Katsuhiko Shirai, Hirofumi Yamamoto, Yoshinori Sagisaka

Proceedings of the EUROSPEECH 2001 Scandinavia, 2001

Multi-Class Composite N-gram Language Model for Spoken Language Processing Using Multiple Word Clusters.

Hirofumi Yamamoto, Shuntaro Isogai, Yoshinori Sagisaka

Proceedings of the Association for Computational Linguistic, 2001

2000

An embedded knowledge integration for hybrid language modelling.

Shuwu Zhang, Hirofumi Yamamoto, Yoshinori Sagisaka

Proceedings of the Sixth International Conference on Spoken Language Processing, 2000

A language model for conversational speech recognition using information designed for speech translation.

Hirofumi Yamamoto, Kouichi Tanigaki, Yoshinori Sagisaka

Proceedings of the Sixth International Conference on Spoken Language Processing, 2000

A hierarchical language model incorporating class-dependent word models for OOV words recognition.

Koichi Tanigaki, Hirofumi Yamamoto, Yoshinori Sagisaka

Proceedings of the Sixth International Conference on Spoken Language Processing, 2000

Rules, but what for? - rule description as efficient and robust abstraction of corpora and optimal fitting to applications -.

Yoshinori Sagisaka, Hirofumi Yamamoto, Minoru Tsuzaki, Hiroaki Kato

Proceedings of the Sixth International Conference on Spoken Language Processing, 2000

Pronunciation variants description using recognition error modeling with phonetic derivation hypotheses.

Hideharu Nakajima, Yoshinori Sagisaka, Hirofumi Yamamoto

Proceedings of the Sixth International Conference on Spoken Language Processing, 2000

1999

Part-of-speech n-gram and word n-gram fused language model.

Hirofumi Yamamoto, Yoshinori Sagisaka

Proceedings of the Sixth European Conference on Speech Communication and Technology, 1999

Multi-class composite N-gram based on connection direction.

Hirofumi Yamamoto, Yoshinori Sagisaka

Proceedings of the 1999 IEEE International Conference on Acoustics, 1999

1998

Reliable utterance segment recognition by integrating a grammar with statistical language constraints.

Hajime Tsukada, Hirofumi Yamamoto, Toshiyuki Takezawa, Yoshinori Sagisaka

Speech Commun., 1998

Grammatical word graph re-generation for spontaneous speech recognition.

Hajime Tsukada, Hirofumi Yamamoto, Toshiyuki Takezawa, Yoshinori Sagisaka

Proceedings of the 5th International Conference on Spoken Language Processing, Incorporating The 7th Australian International Speech Science and Technology Conference, Sydney Convention Centre, Sydney, Australia, 30th November, 1998

1997

Integration of grammar and statistical language constraints for partial word-sequence recognition.

Hajime Tsukada, Hirofumi Yamamoto, Yoshinori Sagisaka

Proceedings of the Fifth European Conference on Speech Communication and Technology, 1997

1996

Spontaneous dialogue speech recognition using cross-word context constrained word graphs.

Tohru Shimizu, Hirofumi Yamamoto, Hirokazu Masataki, Shoichi Matsunaga, Yoshinori Sagisaka

Proceedings of the 1996 IEEE International Conference on Acoustics, 1996