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Homepage of Yuuki Tachioka

[Japanese]

Profile

Education

1995. 4 - 1998. 3Tokyo Gakugei University Takehaya Junior High School
1998. 4 - 2001. 3Tokyo Gakugei University Senior High School
2002. 4 - 2006. 3Department of Architecture, School of Engineering, The University of Tokyo
2006. 4 - 2008. 3Department of Socio-Cultural Environmental Studies, Graduate School of Fronteer Sciences, The University of Tokyo
2011. 4 - 2014. 3Department of Japanese Language and Literature, Colleage of Humanities and Sciences, Nihon University

Work

2008. 4 - 2017.4Mitsubishi Electric Corporation Information Technology R & D center Researcher (Automatic speech recognition)
2017. 5 -Denso IT Laboratory Associate Researcher (Automatic speech recognition)
2012.11 - 2013. 2Mitsubishi Electric Research Laboratories Visitor

Award

2008. 3Master Thesis Award of Socio-Cultural Environmental Studies, Dept. Socio-Cultural Environmental Studies, Grad. Sch. Frontier Sciences, Univ. Tokyo
2008. 919th Excellent Master's Thesis Prize, Architectural Institute of Japan
2014. 335th Awaya Prize, Acoustical Society of Japan

Activity

Acoustical Society of Japan Member
The Mathematical Linguistic Society of Japan Member
The Institute of Electrical and Electronics Engineers Member

Qualification

1996Test in Practical English Proficiency 2nd Grade
2008Bookkeeping (Nissho) 3rd Grade
2009Tour Guide
2009Applied Information Technology Engineer Examination
2009Bookkeeping (Nissho) 2nd Grade
2010The official Business Skill Test in Color Coordinator 3rd Grade
2011The official Business Skill Test in Color Coordinator 2nd Grade
2012Engineer in training (Information Engineering)
2013Embedded system specialist
2013Noise and Vibration Abatement Manager
2014Education Personnel Certification (high school, Japanese)

Research Topic

To clarify one's communication structure, I perform studies in terms of three points below:
1. Study on room acoustic analysis(2006-)
2. Study on speech recognition and enhancement(2008-)
3. Metric Japanese analysis on the diary literature in the Heian period(2011-)

Publication

Thesis

[abst, thesis] Study on the time domain sound field analysis by the CIP method, Graduate School of Frontier Sciences, The University of Tokyo, 2007.
[thesis] Metric study on the diaries in the Heian period -- Study on "Izumishikibu nikki" and "Sarashina Nikki", the College of Humanities and Sciences, Distance Learning Division, The Nihon University 2005.
[abst, thesis] Geometrical acoustic simulation using scattering coefficients to predict the reverberation time of non-diffuse sound fields, Department of Architecture, School of Engineering, The University of Tokyo, 2005.

Refreed Paper

[A10] Y. Tachioka, T. Narita, and S. Watanabe: Effectiveness of dereverberation, feature transformation, discriminative training methods, and system combination approach for various reverberant environments, EURASIP Journal on Advances in Signal Processing, 2015:52 doi:10.1186/s13634-015-0241-y, 2015. 6.
[A09] Y. Tachioka, T. Narita, and J. Ishii: Semi-blind source separation using binary masking and indepedent vector analysis, IEEJ Transactions on Electrical and Electronic Engineering vol.10 no.1, pp.114-115, 2015. 1.
[A08] Y. Tachioka, T. Narita, and J. Ishii: Estimation of speech recognition performance for clipped speech based on objective measures, Acoustical Science and Technology vol.35 no.6, pp.324-326, 2014. 11.
[A07] Y. Tachioka: Metric Japanese study on diary literature in the Heian period and objective measurement on relationship between variants: Analyses on "Izumishikibu nikki" and "Sarashina nikki", Mathematical Linguistics vol.29 no.6, pp.187-210, 2014. 9.
[A06] Y. Tachioka, T. Hanazawa, T. Narita, and J. Ishii: Voice activity detection using density ratio estimation of speech and noise, IEEJ Transactions on Electronics, Infomation and Systems vol.133 no.8, pp.1549-1555, 2013. 8. (in Japanese)
[A05] Y. Tachioka, T. Hirano, and J. Ishii: Elimination of artifacts on aperture synthesis images using ultrasonic sensor's directivity and the ratio of intensity, IEEJ Transactions on Electrical and Electronic Engineering vol.8 no.4, pp., 2013. 7.
[A04] Y. Tachioka, T. Hanazawa, and T. Iwasaki: Dereverberation method with reverberation time estimation using floored ratio of spectral subtraction, Acoustical Science & Technology vol.34 no.3, pp.212-215, 2013. 5.
[A03] Y. Tachioka: Boundary condition for finite-difference time-domain method using digital filters and efficient design of filter coefficients using equivalent mechanical system, Acoustical Science & Technology vol.33 no.5, pp.329-331, 2012. 9.
[A02] Y. Tachioka, T. Narita, and T. Iwasaki: Direction of arrival estimation by cross-power spectrum phase analysis using prior distributions and voice activity detection information, Acoustical Science & Technology vol.33 no.1, pp.68-71, 2012. 1.
[A01] Y. Tachioka, Y. Yasuda, and T. Sakuma: Application of the constrained interpolation profile method to room acoustic problems--Examination of boundary modeling and spatial/time discretization, Acoustical Science & Technology vol.33 no.1, pp.21-32, 2012. 1.

International Conference

[B16] Y. Tachioka and S. Watanabe: Uncertainty training and decoding methods of deep neural networks based on stochastic representation of enhanced features, The 16th Annual Conference of the International Speech Communication Association (INTERSPEECH), Dresden, pp.-, 2015. 9.[refereed(/,%)]
[B15] Y. Tachioka and S. Watanabe: Discriminative method for recurrent neural network language models, The 40th International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Brisbane, pp.5386-5390, 2015. 4.[refereed(/)]
[B14] Y. Tachioka, S. Watanabe, J. Le Roux, J. R. Hershey: Sequential discriminative training for low-rank deep neural network, The 2nd IEEE Global Conference on Signal and Information Processing (GlobalSIP), Atlanta, pp.735-739, 2014. 12.[refereed]
[B13] Y. Tachioka, S. Watanabe, J. Le Roux, J. R. Hershey: Sequential maximum mutual information linear discriminant analysis for speech recognition, The 15th Annual Conference of the International Speech Communication Association (INTERSPEECH), pp.2415-2419, 2014. 9.[refereed(614/1173,52%)]
[B12] Y. Tachioka, T. Narita, S. Watanabe, and J. Le Roux: Ensamble integration of calibrated speaker localization and statistical speech detection, The 4th workshop on Hands-free Speech Communication and Microphone Array (HSCMA), Nancy, ID 1569901761 pp.1-5, 2014. 5.[refereed(41/55)]
[B11] Y. Tachioka, T. Narita, S. Watanabe, and F. Weninger: Dual system combination approach for various reverberant environments, REVERB challenge, Florence, ID 1569886337 pp.1-8, 2014. 5.[refereed]
[B10] F. Weninger, S. Watanabe, J. Le Roux, J. Hershey, Y. Tachioka J. T Geiger, B. W Schuller, and G. Rigoll: The MERL/MELCO/TUM system using deep recurrent neural network speech enhancement, REVERB challenge, Florence, ID 1569884459 pp.1-8, 2014. 5.[refereed]
[B09] F. Weninger, S. Watanabe, Y. Tachioka, and B. Schuller: Deep recurrent de-noising auto-encoder and blind de-reverberation for reverberated speech recognition, The 39th International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Florence, pp.4656-4660, 2014. 5.[refereed(1709/3500)]
[B08] Y. Tachioka and S. Watanabe: A generalized framework of discriminative training for system combination, Automatic Speech Recognition and Understanding Workshop (ASRU), Olomouc, pp.43-48, 2013. 12.[refereed]
[B07] Y. Tachioka, T. Narita, T. Hanazawa, and J. Ishii: Voice activity detection based on density ratio estimation and system combination, Asia-Pacific Signal and Information Processing Association (APSIPA) Annual Summit and Conference, Kaohsiung, pp.1-4, 2013. 11.[refereed]
[B06] Y. Tachioka: Objective measurement of variants in classical literature, The International Conference on Culture and Computing (Culture and Computing 2013), Kyoto, pp.202-203, 2013. 9.[refereed]
[B05] Y. Tachioka and S. Watanabe: Discriminative training of acoustic models for system combination, 14th Annual Conference of the International Speech Communication Association (INTERSPEECH), Lyon, pp.2355-2359, 2013. 8.[refereed]
[B04] Y. Tachioka: Optimal design of sound reflectors by particle swarm optimization, The 21st International Congress on Acoustics (ICA), Montreal, pp.1-9, 2013. 6.
[B03] Y. Tachioka, S. Watanabe, J. Le Roux, and J. R. Hershey: Discriminative methods for noise robust speech recognition: A CHiME Challenge Benchmark, The 2nd International Workshop on Machine Listening in Multisource Environments, Vancouver, pp.19-24, 2013. 6.[refereed]
[B02] Y. Tachioka, S. Watanabe, and J. R. Hershey: Effectiveness of discriminative training and feature transformation for reverberated and noisy speech, The 38th International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Vancouver, pp.6935-6939, 2013. 5.[refereed]
[B01] T. Sakuma, Y. Kosaka and Y. Tachioka: Numerical determination of scattering coefficients of wall surfaces for geometrical room acoustic simulation, 4th Joint Meet. ASA/ASJ (Honolulu), J. Acoust. Soc. Am. Vol.120, pp.2998, 2006. [invited]

Conference in Japan (in Japanese)

[C27] H. Kanagawa, Y. Tachioka, J. Ishii: Ensemble integration of calibrated speaker localization and statistical speech detection in domestic environments: DIRHA corpusA feature-space speaker adaptation technique by applying regression tree-based CMLLR transformation matrices to speech features, Spring Meeting of the Acoustical Society of Japan, pp.13-14, 2015. 3.
[C26] Y. Tachioka, T. Narita, S. Watanabe, J. Le Roux: Ensemble integration of calibrated speaker localization and statistical speech detection in domestic environments: DIRHA corpus, Spring Meeting of the Acoustical Society of Japan, pp.591-594, 2015. 3.
[C25] Y. Tachioka, T. Narita, J. Ishii: Real-time computation of independent vector analysis using binary masking, Annual Meetings of the Institute of Electronics, Information and Communication Engineers, p.94, 2015. 3.
[C24] Y. Tachioka, T. Narita, S. Watanabe, Felix Weninger: Effectiveness of dereverberation techniques and system combination approach for various reverberant environments: REVERB challenge, Autumn Meeting of the Acoustical Society of Japan, pp.19-22, 2014. 9.
[C23] Y. Tachioka, S. Watanabe, J. Le Roux, J. Hershey: A generalized framework of discriminative training for system combination, Autumn Meeting of the Acoustical Society of Japan, pp.3-6, 2014. 9.
[C22] Y. Tachioka: Optimal design of sound reflectors using PSO, Proc. Annual Meeting of Archit. Inst. Jpn (Environ. Eng. I), pp.255-256, 2014. 9.
[C21] Y. Tachioka: Tendencies of upper or lower-oriented merriage among users of marriage information service, Autumn Meeting of the Japanese Association for Mathematical Sociology, 2014. 8.
[C20] Y. Tachioka, T. Narita, J. Ishii: Semi-blind source separation using binary mask and independent component analysis, Annual Meetings of the Institute of Electronics, Information and Communication Engineers, p.61, 2014. 3.
[C19] Y. Tachioka, S. Watanabe, J. Le Roux, J. Hershey: MMI discriminative training of acoustic models for system combination, Spring Meeting of the Acoustical Society of Japan, pp.35-38, 2014. 3.

[C18] Y. Tachioka: Objective analysis on the relationship between variants in classical literature --Example of Izumishikibu-nikki and Sarashina-nikki, Annual Meeting of the Mathematical Linguistic Society of Japan, pp.37-42, 2013. 9.
[C17] Y. Tachioka, S. Watanabe, J. Le Roux, J. Hershey: The effectiveness of discriminative methods to noisy environements on the second CHiME challenge, Autumn Meeting of the Acoustical Society of Japan, pp.1-4, 2013. 9.
[C16] Y. Tachioka, T. Narita, and J. Ishii: Speech recognition of clipped speech, Spring Meeting of the Acoustical Society of Japan, pp.13-14, 2013. 3.

[C15] Y. Tachioka, T. Narita, and J. Ishii: Comparative study on source's distance estimation methods and generalization of cost functions, Autumn Meeting of the Acoustical Society of Japan, pp.90-93, 2012. 9.
[C14] Y. Tachioka, M. Niiyama, T. Hirano, and J. Ishii: Elimination of artifacts on aperture synthesis images using ultrasonic sensor's directivity and the ratio of intensity, Annual Meetings of the Institute of Electronics, Information and Communication Engineers, p.201, 2012. 3.
[C13] Y. Tachioka, T. Hanazawa, T. Narita, and J. Ishii: Voice activity detection using density ratio estimation of speech and noise, Spring Meeting of the Acoustical Society of Japan, pp.9-12, 2012. 3.

[C12] Y. Tachioka, A. Horii, T. Iwasaki, T. Saito, T. Nose, and T. Kobayashi: Performance prediction of speech recognition using speech synthesis: Evaluation under reverberant and noisy environments, Autumn Meeting of the Acoustical Society of Japan, pp.9-10, 2011. 9.
[C11] Y. Tachioka, T. Narita, and T. Iwasaki: Direction of arrival estimation by the CSP method using prior distributions, Spring Meeting of the Acoustical Society of Japan, pp.661-664, 2011. 3.

[C10] Y. Tachioka, T. Hanazawa, and T. Iwasaki:Appropriate acoustic model for reverberant and noisy environments, Autumn Meeting of the Acoustical Society of Japan, pp.17-20, 2010. 9.
[C09] Y. Tachioka, T. Hanazawa, and T. Iwasaki: A study on speech recognition under reverberant environments based on the diffuse sound field theory: evaluation under noisy environments, Spring Meeting of the Acoustical Society of Japan, pp.17-20, 2010. 3.

[C08] Y. Tachioka, T. Hanazawa, and T. Iwasaki: Speech recognition under reverberant environments based on the diffuse sound field theory, Autumn Meeting of the Acoustical Society of Japan, pp.35-38, 2009. 9.

[C07] Y. Tachioka, Y. Yasuda, and T. Sakuma: Time domain sound field analysis by the CIP method: Study on the boundary condition of porous materials, Spring Meeting of the Acoustical Society of Japan, pp.1081-1084, 2008. 3.
[C06] Y. Tachioka, Y. Yasuda, and T. Sakuma: Time domain sound field analysis by the CIP method: Study on the spatial discretization and the use of triangle / tetrahedral meshes, Spring Meeting of the Acoustical Society of Japan, pp.1077-1080, 2008. 3.

[C05] Y. Tachioka, Y. Yasuda, and T. Sakuma: Time domain sound field simulation by the CIP method: comparison to the FDTD method, Autumn Meeting of the Acoustical Society of Japan, pp.979-982, 2007. 9.
[C04] Y. Tachioka, Y. Yasuda, and T. Sakuma: Relationship between normal incidence absorption coefficients and absorption coefficients in reverberation rooms under locally reactive condition: Numerical analysis on reverberation rooms using FDTD method, Proc. Annual Meeting of Archit. Inst. Jpn (Environ. Eng. I), pp.271-272, 2007. 8.

[C03] Y. Tachioka and T. Sakuma: Geometrical acoustic simulation using scattering coefficients to predict the influence of diffuse walls in the shoebox concert hall, Autumn Meeting of the Acoustical Society of Japan, pp.769-770, 2006. 9.
[C02] T. Sakuma, Y. Kosaka, and Y. Tachioka: Diffuseness of sound reflection by walls and room acoustic characteristics, Autumn Meeting of the Acoustical Society of Japan, pp.765-768, 2006. 9. [invited]
[C01] Y. Tachioka, Y. Kosaka, and T. Sakuma: Geometrical acoustic simulation using scattering coefficients to predict the reverberation time of non-diffuse sound fields, Spring Meeting of the Acoustical Society of Japan, pp.823-824, 2006. 3.

Talk or seminar

[D3] Y. Tachioka: Discriminative methods for noise robust speech recognition: A CHiME Challenge Benchmark, Johns Hopkins University talk, 2013. 6.
[D2] Y. Tachioka: Discriminative methods for noise robust speech recognition: A CHiME Challenge Benchmark, MIT sls seminar, 2013. 6.
[D1] Y. Tachioka: Introduction to reseach labs by young researchers, "Information Tech R&D center, Mitsubishi Electric", SLP workshop, 2012. 7.

Workshop

[E4] Y. Tachioka, S. Watanabe, J. Le Roux, J. Hershey: The effectiveness of discriminative methods to noisy environements on the second CHiME challenge, Technical Report of the Institute of Electronics, Information and Communication Engineers, SP2013-55, pp.13-17, 2013. 7.
[E3] Y. Tachioka, T. Hanazawa, T. Narita, J. Ishii: Voice activity detection using density ratio estimation of speech and noise, Technical Report of the Institute of Electronics, Information and Communication Engineers, SP2012-54, pp.23-28, 2012. 7.
[E2] Y. Tachioka, T. Hanazawa, T. Iwasaki: Speech recognition under reverberant environments based on the diffuse sound field theory, Technical Report of the Institute of Electronics, Information and Communication Engineers, SP2010-4, pp.19-24, 2010. 5.
[E1] Y. Tachioka, Y. Yasuda, T. Sakuma: Sound field analysis using the CIP method, Trans. Tech. Comm. Archit. Acoust./Noise Vib. (Acoust. Soc. Jpn.), AA2007-28, pp.1-8, 2007. 7.

Created3/Apr/13
Updated20/May/15