Journal Papers

  • S. Koyama, K. Furuya, K. Wakayama, S. Shimauchi, and H. Saruwatari, “Analytical approach to transforming filter design for sound field recording and reproduction using circular arrays with a spherical baffle,” Journal of the acoustical society of america, vol. 139, no. 3, pp. 1024-1036, 2016. [LINK]
    @article{Koyama:JASA_J_2016,
    author = {Shoichi Koyama and Ken'ichi Furuya and Keigo Wakayama and Suehiro Shimauchi and Hiroshi Saruwatari},
    title = {Analytical approach to transforming filter design for sound field recording and reproduction using circular arrays with a spherical baffle},
    journal = jasa,
    volume = {139},
    number = {3},
    pages = {1024--1036},
    year = {2016},
    category = {Journal Papers},
    url = {http://scitation.aip.org/content/asa/journal/jasa/139/3/10.1121/1.4942590},
    lang = {en}
    }

  • S. Koyama, K. Furuya, Y. Haneda, and H. Saruwatari, “Source-location-informed sound field recording and reproduction,” IEEE journal of selected topics in signal processing, vol. 9, no. 5, pp. 881-894, 2015. [LINK]
    @article{Koyama:IEEE_J_JSTSP2015,
    author = {Shoichi Koyama and Ken'ichi Furuya and Yoichi Haneda and Hiroshi Saruwatari},
    title = {Source-Location-Informed Sound Field Recording and Reproduction},
    journal = ieee_j_jstsp,
    volume = {9},
    number = {5},
    pages = {881--894},
    year = {2015},
    category = {Journal Papers},
    url = {http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=7109813},
    lang = {en}
    }

  • S. Koyama, K. Furuya, Y. Hiwasaki, Y. Haneda, and Y. Suzuki, “Wave field reconstruction filtering in cylindrical harmonic domain for with-height recording and reproduction,” IEEE/ACM transactions on audio, speech, and language processing, vol. 22, no. 10, pp. 1546-1557, 2014. [LINK]
    @article{Koyama:IEEE_ACM_J_ASLP2014,
    author = {Shoichi Koyama and Ken'ichi Furuya and Yusuke Hiwasaki and Yoichi Haneda and Y\^oiti Suzuki},
    title = {Wave Field Reconstruction Filtering in Cylindrical Harmonic Domain for With-Height Recording and Reproduction},
    journal = ieee_acm_j_aslp,
    volume = {22},
    number = {10},
    pages = {1546--1557},
    year = {2014},
    category = {Journal Papers},
    url = {http://ieeexplore.ieee.org/xpl/articleDetails.jsp?tp=&arnumber=6857401},
    lang = {en}
    }

  • S. Koyama, K. Furuya, H. Uematsu, Y. Hiwasaki, and Y. Haneda, “Real-time sound field transmission system by using wave field reconstruction filter and its evaluation,” IEICE transactions on fundamentals of electronics, communications and computer sciences, vol. E97-A, no. 9, pp. 1840-1848, 2014. [LINK] [PDF] (Copyright © 2014 IEICE)
    @article{Koyama:IEICE_J_EA_2014,
    author = {Shoichi Koyama and Ken'ichi Furuya and Hisashi Uematsu and Yusuke Hiwasaki and Yoichi Haneda},
    title = {Real-time Sound Field Transmission System by Using Wave Field Reconstruction Filter and Its Evaluation},
    journal = {{IEICE} Transactions on Fundamentals of Electronics, Communications and Computer Sciences},
    volume = {E97-A},
    number = {9},
    pages = {1840--1848},
    year = {2014},
    category = {Journal Papers},
    url = {http://search.ieice.org/bin/summary.php?id=e97-a_9_1840&category=A&year=2014&lang=E&abst=},
    pdf = {http://www.sp.ipc.i.u-tokyo.ac.jp/wp-content/papercite-data/koyama/koyama-ieice_j_ea_2014.pdf},
    ieicenotice = {2014},
    lang = {en}
    }

  • Y. Haneda, K. Furuya, S. Koyama, and K. Niwa, “Close-talking microphone arrays based on spherical harmonic expansion,” IEICE transactions on fundamentals of electronics, communications and computer sciences, vol. J97-A, no. 4, pp. 264-273, 2014. (in Japanese) [LINK]
    @article{Haneda:IEICE_J_JA_A2014_en,
    author = {Yoichi Haneda and Ken'ichi Furuya and Shoichi Koyama and Kenta Niwa},
    title = {Close-talking microphone arrays based on spherical harmonic expansion},
    journal = {{IEICE} Transactions on Fundamentals of Electronics, Communications and Computer Sciences},
    volume = {J97-A},
    number = {4},
    pages = {264--273},
    year = {2014},
    note = {(in Japanese)},
    category = {Journal Papers},
    url = {http://search.ieice.org/bin/summary.php?id=j97-a_4_264&category=A&year=2014&lang=J&abst=},
    lang = {ja}
    }

  • Y. Haneda, K. Furuya, S. Koyama, K. Niwa, and K. Kobayashi, “Sound field simulation for circular array based on spatial circular convolution,” Acoustical science and technology, vol. 35, no. 2, pp. 99-107, 2014. [LINK]
    @article{Haneda:AST2014,
    author = {Yoichi Haneda and Ken'ichi Furuya and Shoichi Koyama and Kenta Niwa and Kazunori Kobayashi},
    title = {Sound field simulation for circular array based on spatial circular convolution},
    journal = {Acoustical Science and Technology},
    volume = {35},
    number = {2},
    pages = {99--107},
    year = {2014},
    url = {https://www.jstage.jst.go.jp/article/ast/35/2/35_E1328/_article},
    category = {Journal Papers},
    lang = {en}
    }

  • S. Koyama, K. Furuya, Y. Hiwasaki, and Y. Haneda, “Analytical approach to wave field reconstruction filtering in spatio-temporal frequency domain,” IEEE transactions on audio, speech, and language processing, vol. 21, no. 4, pp. 685-696, 2013. [LINK]
    @article{Koyama:IEEE_J_ASLP2013,
    author = {Shoichi Koyama and Ken'ichi Furuya and Yusuke Hiwasaki and Yoichi Haneda},
    title = {Analytical Approach to Wave Field Reconstruction Filtering in Spatio-Temporal Frequency Domain},
    journal = ieee_j_aslp,
    volume = {21},
    number = {4},
    pages = {685--696},
    year = {2013},
    category = {Journal Papers},
    url = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6362183},
    lang = {en}
    }

  • S. Koyama, K. Furuya, Y. Hiwasaki, and Y. Haneda, “Reproducing virtual sound sources in front of a loudspeaker array using inverse wave propagator,” IEEE transactions on audio, speech, and language processing, vol. 20, no. 6, pp. 1746-1758, 2012. [LINK]  [The Telecom System Technology Award, the Telecommunication Advancement Foundation]
    @article{Koyama:IEEE_J_ASLP2012,
    author = {Shoichi Koyama and Ken'ichi Furuya and Yusuke Hiwasaki and Yoichi Haneda},
    title = {Reproducing Virtual Sound Sources in Front of a Loudspeaker Array Using Inverse Wave Propagator},
    journal = ieee_j_aslp,
    volume = {20},
    number = {6},
    pages = {1746--1758},
    year = {2012},
    category = {Journal Papers},
    url = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6155598},
    lang = {en},
    award_en = {The Telecom System Technology Award, the Telecommunication Advancement Foundation},
    award_ja = {電気通信普及財団, テレコムシステム技術賞}
    }

  • S. Koyama, T. Kurihara, and S. Ando, “A theory and experiment of instantaneous wave source localization from a wave distribution on a small region,” IEEJ transactions of sensors and micromachines, vol. 129-E, no. 10, pp. 350-356, 2009. (in Japanese) [LINK]  [The Best Young Researcher Paper Award, IEEJ Sensors and Micromachines Society]
    @article{Koyama:IEEJ_J_SM2009_en,
    author = {Shoichi Koyama and Toru Kurihara and Shigeru Ando},
    title = {A Theory and Experiment of Instantaneous Wave Source Localization from a Wave Distribution on a Small Region},
    journal = {{IEEJ} Transactions of Sensors and Micromachines},
    volume = {129-E},
    number = {10},
    pages = {350--356},
    year = {2009},
    note = {(in Japanese)},
    category = {Journal Papers},
    url = {https://www.jstage.jst.go.jp/article/ieejsmas/129/10/129_10_350/_article},
    lang = {ja},
    award_en = {The Best Young Researcher Paper Award, IEEJ Sensors and Micromachines Society}
    }

Letters

  • J. Trevino, S. Koyama, S. Sakamoto, and Y. Suzuki, “Mixed-order ambisonics encoding of cylindrical microphone array signals,” Acoustical science and technology, acoustical letter, vol. 35, no. 3, pp. 174-177, 2014. [LINK] [PDF]
    @article{Trevino:AST_AL2014,
    author = {Jorge Trevino and Shoichi Koyama and Shuichi Sakamoto and Y\^oiti Suzuki},
    title = {Mixed-order Ambisonics encoding of cylindrical microphone array signals},
    journal = {Acoustical Science and Technology, Acoustical Letter},
    volume = {35},
    number = {3},
    pages = {174--177},
    year = {2014},
    category = {Letters},
    url = {https://www.jstage.jst.go.jp/article/ast/35/3/35_E1377/_article},
    pdf = {https://www.jstage.jst.go.jp/article/ast/35/3/35_E1377/_pdf},
    lang = {en}
    }

Articles

  • S. Koyama, “Sparse sound field representation for super-resolution in recording and reproduction,” Journal of the acoustical society of japan, vol. 71, no. 11, pp. 632-638, 2015. (in Japanese) [LINK]
    @article{Koyama:ASJ_J2015_en,
    author = {Shoichi Koyama},
    title = {Sparse sound field representation for super-resolution in recording and reproduction},
    journal = {Journal of the Acoustical Society of Japan},
    volume = {71},
    number = {11},
    pages = {632--638},
    year = {2015},
    category = {Articles},
    lang = {ja},
    url = {http://ci.nii.ac.jp/naid/110010010501},
    note = {(in Japanese)}
    }

  • K. Furuya and S. Koyama, “Wave field synthesis; principles and applications,” Journal of the institute of image information and television engineers, vol. 68, no. 8, pp. 621-624, 2014. (in Japanese) [LINK] [PDF]
    @article{Furuya:ITE_J2014_en,
    author = {Ken'ichi Furuya and Shoichi Koyama},
    title = {Wave Field Synthesis; Principles and applications},
    journal = {Journal of the Institute of Image Information and Television Engineers},
    volume = {68},
    number = {8},
    pages = {621--624},
    year = {2014},
    note = {(in Japanese)},
    category = {Articles},
    url = {https://www.jstage.jst.go.jp/article/itej/68/8/68_621/_article/-char/ja/},
    pdf = {https://www.jstage.jst.go.jp/article/itej/68/8/68_621/_pdf},
    lang = {ja}
    }

  • S. Koyama, “Mathematical formulation of sound field reproduction –mathematics in wave field synthesis and higher order ambisonics–,” Journal of the acoustical society of japan, vol. 68, no. 11, pp. 584-589, 2012. (in Japanese) [LINK] [PDF]
    @article{Koyama:ASJ_J2012_en,
    author = {Shoichi Koyama},
    title = {Mathematical formulation of sound field reproduction --Mathematics in Wave Field Synthesis and Higher Order Ambisonics--},
    journal = {Journal of the Acoustical Society of Japan},
    volume = {68},
    number = {11},
    pages = {584--589},
    year = {2012},
    note = {(in Japanese)},
    category = {Articles},
    url = {http://ci.nii.ac.jp/naid/110009554072/},
    pdf = {http://www.sp.ipc.i.u-tokyo.ac.jp/wp-content/papercite-data/koyama/koyama-asj_j2012.pdf},
    lang = {ja}
    }

International Conferences

  • N. Ueno, S. Koyama, and H. Saruwatari, “Listening-area-informed sound field reproduction based on circular harmonic expansion,” in Proceedings of IEEE international conference on acoustics, speech, and signal processing (ICASSP), Mar. 2017 (to appear).
    @inproceedings{Ueno:ICASSP2017,
    author = {Natsuki Ueno and Shoichi Koyama and Hiroshi Saruwatari},
    title = {Listening-area-informed Sound Field Reproduction Based On Circular Harmonic Expansion},
    booktitle = proc # ieee_icassp,
    addresss = {New Orleans},
    month = {Mar.},
    year = {2017 (to appear)},
    category = {International Conferences},
    lang = {en}
    }

  • N. Murata, S. Koyama, N. Takamune, and H. Saruwatari, “Spatio-temporal sparse sound field decomposition considering acoustic source signal characteristics,” in Proceedings of IEEE international conference on acoustics, speech, and signal processing (ICASSP), Mar. 2017 (to appear).
    @inproceedings{Murata:ICASSP2017,
    author = {Naoki Murata and Shoichi Koyama and Norihiro Takamune and Hiroshi Saruwatari},
    title = {Spatio-temporal Sparse Sound Field Decomposition Considering Acoustic Source Signal Characteristics},
    booktitle = proc # ieee_icassp,
    addresss = {New Orleans},
    month = {Mar.},
    year = {2017 (to appear)},
    category = {International Conferences},
    lang = {en}
    }

  • N. Ueno, S. Koyama, and H. Saruwatari, “Listening-area-informed sound field reproduction with gaussian prior based on circular harmonic expansion,” in Proceedings of hands-free speech communication and microphone arrays (HSCMA), Mar. 2017 (to appear).
    @inproceedings{Ueno:HSCMA2017,
    author = {Natsuki Ueno and Shoichi Koyama and Hiroshi Saruwatari},
    title = {Listening-area-informed Sound Field Reproduction With Gaussian Prior Based On Circular Harmonic Expansion},
    booktitle = proc # {Hands-free Speech Communication and Microphone Arrays ({HSCMA})},
    addresss = {San Francisco},
    month = {Mar.},
    year = {2017 (to appear)},
    category = {International Conferences},
    lang = {en}
    }

  • H. Nakajima, D. Kitamura, N. Takamune, S. Koyama, H. Saruwatari, Y. Takahashi, and K. Kondo, “Audio signal separation using supervised NMF with time-variant all-pole-model-based basis deformation,” in Asia-pacific signal and information processing association annual summit and conference (APSIPA ASC), Jeju, Dec. 2016. [LINK] [PDF]  [Invited]
    @inproceedings{Nakajima:APSIPA2016,
    author = {Hiroaki Nakajima and Daichi Kitamura and Norihiro Takamune and Shoichi Koyama and Hiroshi Saruwatari and Yu Takahashi and Kazunobu Kondo},
    title = {Audio Signal Separation using Supervised {NMF} with Time-variant All-Pole-Model-Based Basis Deformation},
    booktitle = {Asia-Pacific Signal and Information Processing Association Annual Summit and Conference ({APSIPA ASC})},
    month = {Dec.},
    address = {Jeju},
    year = {2016},
    category = {International Conferences},
    url = {http://ieeexplore.ieee.org/document/7820763/},
    pdf = {http://www.apsipa.org/proceedings_2016/HTML/paper2016/206.pdf},
    lang = {en},
    invite = {2}
    }

  • S. Koyama, N. Murata, and H. Saruwatari, “Super-resolution in sound field recording and reproduction based on sparse representation,” in 5th joint meeting of the acoustical society of america and acoustical society of japan, Honolulu, Nov. 2016. [LINK]  [Invited]
    @inproceedings{Koyama:ASA_ASJ_joint2016,
    author = {Shoichi Koyama and Naoki Murata and Hiroshi Saruwatari},
    title = {Super-resolution in sound field recording and reproduction based on sparse representation},
    booktitle = {5th Joint Meeting of the Acoustical Society of America and Acoustical Society of Japan},
    month = {Nov.},
    address = {Honolulu},
    year = {2016},
    url = {http://scitation.aip.org/content/asa/journal/jasa/140/4/10.1121/1.4969760},
    category = {International Conferences},
    lang = {en},
    invite = {1}
    }

  • N. Murata, H. Kameoka, K. Kinoshita, S. Araki, T. Nakatani, S. Koyama, and H. Saruwatari, “Reverberation-robust underdetermined source separation with non-negative tensor double deconvolution,” in Proceedings of european signal processing conference (EUSIPCO), Budapest, Aug. 2016, pp. 1648-1652. [LINK] [PDF]
    @inproceedings{Murata:EUSIPCO2016,
    author = {Naoki Murata and Hirokazu Kameoka and Keisuke Kinoshita and Shoko Araki and Tomohiro Nakatani and Shoichi Koyama and Hiroshi Saruwatari},
    title = {Reverberation-robust underdetermined source separation with non-negative tensor double deconvolution},
    booktitle = proc # eusipco,
    month = {Aug.},
    address = {Budapest},
    year = {2016},
    pages = {1648--1652},
    url = {http://ieeexplore.ieee.org/abstract/document/7760528/},
    pdf = {http://www.eurasip.org/Proceedings/Eusipco/Eusipco2016/papers/1570252361.pdf},
    category = {International Conferences},
    lang = {en}
    }

  • H. Nakajima, D. Kitamura, N. Takamune, S. Koyama, H. Saruwatari, N. Ono, Y. Yakahashi, and K. Kondo, “Music signal separation using supervised NMF with all-polle-model-based discriminative basis deformation,” in Proceedings of european signal processing conference (EUSIPCO), Budapest, Aug. 2016, pp. 1143-1147. [LINK] [PDF]
    @inproceedings{Nakajima:EUSIPCO2016,
    author = {Hiroaki Nakajima and Daichi Kitamura and Norihiro Takamune and Shoichi Koyama and Hiroshi Saruwatari and Nobutaka Ono and Yu Yakahashi and Kazunobu Kondo},
    title = {Music Signal Separation Using Supervised {NMF} with All-Polle-Model-Based Discriminative Basis Deformation},
    booktitle = proc # eusipco,
    month = {Aug.},
    address = {Budapest},
    year = {2016},
    pages = {1143--1147},
    url = {http://ieeexplore.ieee.org/document/7760427/},
    pdf = {http://www.eurasip.org/Proceedings/Eusipco/Eusipco2016/papers/1570252089.pdf},
    category = {International Conferences},
    lang = {en}
    }

  • S. Koyama, “Source-location-informed sound field recording and reproduction: a generalization to arrays of arbitrary geometry,” in Proceedings of 2016 AES international conference on sound field control, Guildford, Jul. 2016. [LINK]  [Invited]
    @inproceedings{Koyama:AESconf2016SFC,
    author = {Shoichi Koyama},
    title = {Source-Location-Informed Sound Field Recording and Reproduction: A Generalization to Arrays of Arbitrary Geometry},
    booktitle = proc # {2016 } # aes_conf # { on Sound Field Control},
    month = {Jul.},
    address = {Guildford},
    year = {2016},
    url = {http://www.aes.org/e-lib/browse.cfm?elib=18303},
    category = {International Conferences},
    lang = {en},
    invite = {1}
    }

  • S. Koyama and H. Saruwatari, “Sound field decomposition in reverberant environment using sparse and low-rank signal models,” in Proceedings of IEEE international conference on acoustics, speech, and signal processing (ICASSP), Shanghai, Mar. 2016, pp. 345-349. [LINK]
    @inproceedings{Koyama:ICASSP2016,
    author = {Shoichi Koyama and Hiroshi Saruwatari},
    title = {Sound Field Decomposition in Reverberant Environment Using Sparse and Low-rank Signal Models},
    booktitle = proc # ieee_icassp,
    month = {Mar.},
    address = {Shanghai},
    year = {2016},
    pages = {345--349},
    url = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=7471704},
    category = {International Conferences},
    lang = {en}
    }

  • Y. Mitsufuji, S. Koyama, and H. Saruwatari, “Multichannel blind source separation based on non-negative tensor factorization in wavenumber domain,” in Proceedings of IEEE international conference on acoustics, speech, and signal processing (ICASSP), Shanghai, Mar. 2016, pp. 56-60. [LINK]
    @inproceedings{Mitsufuji:ICASSP2016,
    author = {Yuki Mitsufuji and Shoichi Koyama and Hiroshi Saruwatari},
    title = {Multichannel Blind Source Separation Based on Non-negative Tensor Factorization in Wavenumber Domain},
    booktitle = proc # ieee_icassp,
    month = {Mar.},
    address = {Shanghai},
    year = {2016},
    pages = {56--60},
    url = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=7471636},
    category = {International Conferences},
    lang = {en}
    }

  • N. Murata, S. Koyama, H. Kameoka, N. Takamune, and H. Saruwatari, “Sparse sound field decomposition with multichannel extension of complex NMF,” in Proceedings of IEEE international conference on acoustics, speech, and signal processing (ICASSP), Shanghai, Mar. 2016, pp. 395-399. [LINK]
    @inproceedings{Murata:ICASSP2016,
    author = {Naoki Murata and Shoichi Koyama and Hirokazu Kameoka and Norihiro Takamune and Hiroshi Saruwatari},
    title = {Sparse Sound Field Decomposition with Multichannel Extension of Complex {NMF}},
    booktitle = proc # ieee_icassp,
    month = {Mar.},
    address = {Shanghai},
    year = {2016},
    pages = {395--399},
    url = {http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=7471694},
    category = {International Conferences},
    lang = {en}
    }

  • N. Murata, S. Koyama, N. Takamune, and H. Saruwatari, “Sparse sound field decomposition with parametric dictionary learning for super-resolution recording and reproduction,” in IEEE international workshop on computational advances in multi-sensor adaptive processing (CAMSAP), Cancun, Dec. 2015, pp. 69-72. [LINK]
    @inproceedings{Murata:CAMSAP2015,
    author = {Naoki Murata and Shoichi Koyama and Norihiro Takamune and Hiroshi Saruwatari},
    title = {Sparse Sound Field Decomposition with Parametric Dictionary Learning for Super-Resolution Recording and Reproduction},
    booktitle = {{IEEE} International Workshop on Computational Advances in Multi-Sensor Adaptive Processing ({CAMSAP})},
    month = {Dec.},
    address = {Cancun},
    year = {2015},
    pages = {69--72},
    url = {http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=7383738},
    category = {International Conferences},
    lang = {en}
    }

  • S. Koyama, A. Matsubayashi, N. Murata, and H. Saruwatari, “Sparse sound field decomposition using group sparse bayesian learning,” in Asia-pacific signal and information processing association annual summit and conference (APSIPA ASC), Hong Kong, Dec. 2015, pp. 850-855. [LINK] [PDF]  [Invited]
    @inproceedings{Koyama:APSIPA2015,
    author = {Shoichi Koyama and Atsushi Matsubayashi and Naoki Murata and Hiroshi Saruwatari},
    title = {Sparse Sound Field Decomposition Using Group Sparse Bayesian Learning},
    booktitle = {Asia-Pacific Signal and Information Processing Association Annual Summit and Conference ({APSIPA ASC})},
    month = {Dec.},
    address = {Hong Kong},
    year = {2015},
    pages = {850--855},
    url = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=7415391},
    pdf = {http://www.apsipa.org/proceedings_2015/pdf/239.pdf},
    category = {International Conferences},
    lang = {en},
    invite = {1}
    }

  • S. Koyama, K. Ito, and H. Saruwatari, “Source-location-informed sound field recording and reproduction with spherical arrays,” in Proceedings of IEEE workshop on applications of signal processing to audio and acoustics (WASPAA), New Paltz, Oct. 2015. [LINK]
    @inproceedings{Koyama:WASPAA2015,
    author = {Shoichi Koyama and Koichiro Ito and Hiroshi Saruwatari},
    title = {Source-location-informed sound field recording and reproduction with spherical arrays},
    booktitle = proc # ieee_waspaa,
    address = {New Paltz},
    month = {Oct.},
    year = {2015},
    url = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=7336914},
    category = {International Conferences},
    lang = {en}
    }

  • S. Koyama, N. Murata, and H. Saruwatari, “Structured sparse signal models and decomposition algorithm for super-resolution in sound field recording and reproduction,” in Proceedings of IEEE international conference on acoustics, speech, and signal processing (ICASSP), Brisbane, Apr. 2015, pp. 619-623. [LINK]
    @inproceedings{Koyama:ICASSP2015,
    author = {Shoichi Koyama and Naoki Murata and Hiroshi Saruwatari},
    title = {Structured sparse signal models and decomposition algorithm for super-resolution in sound field recording and reproduction},
    booktitle = proc # ieee_icassp,
    address = {Brisbane},
    month = {Apr.},
    year = {2015},
    pages = {619--623},
    url = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=7178043},
    category = {International Conferences},
    lang = {en}
    }

  • Y. Murota, D. Kitamura, S. Koyama, H. Saruwatari, and S. Nakamura, “Statistical modeling of binaural signal and its application to binaural source separation,” in Proceedings of IEEE international conference on acoustics, speech, and signal processing (ICASSP), Brisbane, Apr. 2015, pp. 494-498. [LINK]
    @inproceedings{Murota:ICASSP2015,
    author = {Yuki Murota and Daichi Kitamura and Shoichi Koyama and Hiroshi Saruwatari and Satoshi Nakamura},
    title = {Statistical modeling of binaural signal and its application to binaural source separation},
    booktitle = proc # ieee_icassp,
    address = {Brisbane},
    month = {Apr.},
    year = {2015},
    pages = {494--498},
    url = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=7178018},
    category = {International Conferences},
    lang = {en}
    }

  • S. Koyama, P. Srivastava, K. Furuya, S. Shimauchi, and H. Ohmuro, “STSP: space-time stretched pulse for measuring spatio-temporal impulse response,” in Proceedings of international workshop on acoustic signal enhancement (IWAENC), Antibes, Sep. 2014, pp. 309-313. [LINK]
    @inproceedings{Koyama:IWAENC2014,
    author = {Shoichi Koyama and Prakhar Srivastava and Ken'ichi Furuya and Suehiro Shimauchi and Hitoshi Ohmuro},
    title = {{STSP}: Space-Time Stretched Pulse for Measuring Spatio-Temporal Impulse Response},
    booktitle = proc # iwaenc,
    address = {Antibes},
    month = {Sep.},
    pages = {309--313},
    year = {2014},
    category = {International Conferences},
    url = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6954308},
    lang = {en}
    }

  • Y. Haneda, K. Furuya, S. Koyama, and K. Niwa, “Close-talking spherical microphone array using sound pressure interpolation based on spherical harmonic expansion,” in Proceedings of IEEE international conference on acoustics, speech, and signal processing (ICASSP), Florence, May 2014, pp. 604-608. [LINK]
    @inproceedings{Haneda:ICASSP2014,
    author = {Yoichi Haneda and Ken'ichi Furuya and Shoichi Koyama and Kenta Niwa},
    title = {Close-talking spherical microphone array using sound pressure interpolation based on spherical harmonic expansion},
    booktitle = proc # ieee_icassp,
    address = {Florence},
    month = {May},
    pages = {604--608},
    year = {2014},
    category = {International Conferences},
    url = {http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6853667},
    lang = {en}
    }

  • S. Koyama, S. Shimauchi, and H. Ohmuro, “Sparse sound field representation in recording and reproduction for reducing spatial aliasing artifacts,” in Proceedings of IEEE international conference on acoustics, speech, and signal processing (ICASSP), Florence, May 2014, pp. 4443-4447. [LINK]
    @inproceedings{Koyama:ICASSP2014,
    author = {Shoichi Koyama and Suehiro Shimauchi and Hitoshi Ohmuro},
    title = {Sparse Sound Field Representation in Recording and Reproduction for Reducing Spatial Aliasing Artifacts},
    booktitle = proc # ieee_icassp,
    address = {Florence},
    month = {May},
    pages = {4443--4447},
    year = {2014},
    category = {International Conferences},
    url = {http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6854442},
    lang = {en}
    }

  • S. Koyama, K. Furuya, Y. Hiwasaki, and Y. Haneda, “MAP estimation of driving signals of loudspeakers for sound field reproduction from pressure measurements,” in Proceedings of IEEE workshop on applications of signal processing to audio and acoustics (WASPAA), New Paltz, Oct. 2013. [LINK]
    @inproceedings{Koyama:WASPAA2013,
    author = {Shoichi Koyama and Ken'ichi Furuya and Yusuke Hiwasaki and Yoichi Haneda},
    title = {{MAP} Estimation of Driving Signals of Loudspeakers for Sound Field Reproduction From Pressure Measurements},
    booktitle = proc # ieee_waspaa,
    address = {New Paltz},
    month = {Oct.},
    year = {2013},
    category = {International Conferences},
    url = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6701895},
    lang = {en}
    }

  • S. Koyama, K. Furuya, H. Uematsu, Y. Hiwasaki, and Y. Haneda, “Real-time sound field transmission system by using wave field reconstruction filter and its subjective listening test,” in Proceedings of 52nd AES international conference, Guildford, Sep. 2013. [LINK]
    @inproceedings{Koyama:AES52Conf2013,
    author = {Shoichi Koyama and Ken'ichi Furuya and Hisashi Uematsu and Yusuke Hiwasaki and Yoichi Haneda},
    title = {Real-time sound field transmission system by using wave field reconstruction filter and its subjective listening test},
    booktitle = proc # {52nd } # aes_conf,
    address = {Guildford},
    month = {Sep.},
    year = {2013},
    category = {International Conferences},
    url = {http://www.aes.org/e-lib/browse.cfm?elib=16899},
    lang = {en}
    }

  • H. Takada, M. Date, S. Koyama, S. Ozawa, S. Mieda, and A. Kojima, “High-reality space composition using stably-positioned imaging and acoustic wave field synthesis,” in Proceedings of 36th european conference on visual perception (ECVP), Bremen, Aug. 2013, p. 224. [LINK]
    @inproceedings{Takada:ECVP2013,
    author = {Hideaki Takada and Munekazu Date and Shoichi Koyama and Shiro Ozawa and Satoshi Mieda and Akira Kojima},
    title = {High-reality space composition using stably-positioned imaging and acoustic wave field synthesis},
    booktitle = {Proceedings of 36th European Conference on Visual Perception ({ECVP})},
    pages = {224},
    address = {Bremen},
    month = {Aug.},
    year = {2013},
    category = {International Conferences},
    url = {http://www.perceptionweb.com/abstract.cgi?id=v130041},
    lang = {en}
    }

  • S. Koyama, T. Lee, K. Furuya, Y. Hiwasaki, and Y. Haneda, “Improvement using circular harmonics beamforming on reverberation problem of wave field reconstruction filtering,” in Proceedings of IEEE international conference on acoustics, speech, and signal processing (ICASSP), Vancouver, Mar. 2013, pp. 276-280. [LINK]
    @inproceedings{Koyama:ICASSP2013_2,
    author = {Shoichi Koyama and Timothy Lee and Ken'ichi Furuya and Yusuke Hiwasaki and Yoichi Haneda},
    title = {Improvement using circular harmonics beamforming on reverberation problem of wave field reconstruction filtering},
    booktitle = proc # ieee_icassp,
    pages = {276--280},
    address = {Vancouver},
    month = {Mar.},
    year = {2013},
    category = {International Conferences},
    url = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6637652},
    lang = {en}
    }

  • S. Koyama, K. Furuya, Y. Hiwasaki, Y. Haneda, and Y. Suzuki, “Sound field reproduction using multiple linear arrays based on wave field reconstruction filtering in helical wave spectrum domain,” in Proceedings of IEEE international conference on acoustics, speech, and signal processing (ICASSP), Vancouver, Mar. 2013, pp. 271-275. [LINK]
    @inproceedings{Koyama:ICASSP2013_1,
    author = {Shoichi Koyama and Ken'ichi Furuya and Yusuke Hiwasaki and Yoichi Haneda and Y\^oiti Suzuki},
    title = {Sound field reproduction using multiple linear arrays based on wave field reconstruction filtering in helical wave spectrum domain},
    booktitle = proc # ieee_icassp,
    pages = {271--275},
    address = {Vancouver},
    month = {Mar.},
    year = {2013},
    category = {International Conferences},
    url = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6637651},
    lang = {en}
    }

  • S. Emura, S. Koyama, K. Furuya, and Y. Haneda, “Posterior residual echo canceling and its complexity reduction in the wave domain,” in Proceedings of international workshop on acoustic signal enhancement (IWAENC), Aachen, Sep. 2012. [LINK]
    @inproceedings{Emura:IWAENC2012,
    author = {Satoru Emura and Shoichi Koyama and Ken'ichi Furuya and Yoichi Haneda},
    title = {Posterior Residual Echo Canceling and its Complexity Reduction in the Wave Domain},
    booktitle = proc # iwaenc,
    address = {Aachen},
    month = {Sep.},
    year = {2012},
    category = {International Conferences},
    url = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6309416},
    lang = {en}
    }

  • S. Koyama, K. Furuya, Y. Hiwasaki, and Y. Haneda, “Sound field reproduction method in spatio-temporal frequency domain considering directivity of loudspeakers,” in Proceedings of 132nd AES convention, Budapest, Apr. 2012. [LINK]
    @inproceedings{Koyama:AES132Conv2012,
    author = {Shoichi Koyama and Ken'ichi Furuya and Yusuke Hiwasaki and Yoichi Haneda},
    title = {Sound Field Reproduction Method in Spatio-Temporal Frequency Domain Considering Directivity of Loudspeakers},
    booktitle = proc # {132nd } # aes_conv,
    address = {Budapest},
    month = {Apr.},
    year = {2012},
    category = {International Conferences},
    url = {http://www.aes.org/e-lib/online/browse.cfm?elib=16302},
    lang = {en}
    }

  • S. Koyama, K. Furuya, Y. Hiwasaki, and Y. Haneda, “Design of transform filter for reproducing arbitrary shifted sound field using phase-shift of spatio-temporal frequency,” in Proceedings of IEEE international conference on acoustics, speech, and signal processing (ICASSP), Kyoto, 2012, pp. 381-384. [LINK]
    @inproceedings{Koyama:ICASSP2012,
    author = {Shoichi Koyama and Ken'ichi Furuya and Yusuke Hiwasaki and Yoichi Haneda},
    title = {Design of Transform Filter for Reproducing Arbitrary Shifted Sound Field Using Phase-Shift of Spatio-Temporal Frequency},
    booktitle = proc # ieee_icassp,
    pages = {381--384},
    address = {Kyoto},
    year = {2012},
    category = {International Conferences},
    url = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6287896},
    lang = {en}
    }

  • S. Koyama, K. Furuya, Y. Hiwasaki, and Y. Haneda, “Sound field recording and reproduction using transform filter designed in spatio-temporal frequency domain,” in Proceedings of 131st AES convention, New York, Oct. 2011. [LINK]
    @inproceedings{Koyama:AES131Conv2011,
    author = {Shoichi Koyama and Ken'ichi Furuya and Yusuke Hiwasaki and Yoichi Haneda},
    title = {Sound Field Recording and Reproduction Using Transform Filter Designed in Spatio-Temporal Frequency Domain},
    booktitle = proc # {131st } # aes_conv,
    address = {New York},
    month = {Oct.},
    year = {2011},
    category = {International Conferences},
    url = {http://www.aes.org/e-lib/browse.cfm?conv=131&papernum=8544},
    lang = {en}
    }

  • S. Koyama, K. Furuya, Y. Hiwasaki, and Y. Haneda, “Design of transform filter for sound field reproduction using microphone array and loudspeaker array,” in Proceedings of IEEE workshop on applications of signal processing to audio and acoustics (WASPAA), New Paltz, Oct. 2011, pp. 5-8. [LINK]
    @inproceedings{Koyama:WASPAA2011,
    author = {Shoichi Koyama and Ken'ichi Furuya and Yusuke Hiwasaki and Yoichi Haneda},
    title = {Design of Transform Filter for Sound Field Reproduction Using Microphone Array and Loudspeaker Array},
    booktitle = proc # ieee_waspaa,
    pages = {5--8},
    address = {New Paltz},
    month = {Oct.},
    year = {2011},
    category = {International Conferences},
    url = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6082291},
    lang = {en}
    }

  • S. Koyama, Y. Hiwasaki, K. Furuya, and Y. Haneda, “Inverse wave propagation for reproducing virtual source in front of loudspeaker array,” in Proceedings of european signal processing conference (EUSIPCO), Barcelona, Sep. 2011, pp. 1322-1326. [PDF]
    @inproceedings{Koyama:EUSIPCO2011,
    author = {Shoichi Koyama and Yusuke Hiwasaki and Ken'ichi Furuya and Yoichi Haneda},
    title = {Inverse Wave Propagation for Reproducing Virtual Source in Front of Loudspeaker Array},
    booktitle = proc # eusipco,
    pages = {1322--1326},
    address = {Barcelona},
    month = {Sep.},
    year = {2011},
    category = {International Conferences},
    pdf = {http://www.eurasip.org/Proceedings/Eusipco/Eusipco2011/papers/1569416679.pdf},
    lang = {en}
    }

  • S. Koyama, Y. Hiwasaki, K. Furuya, and Y. Haneda, “Inverse wave propagation in wave field synthesis,” in Proceedings of 40th AES international conference, Tokyo, Oct. 2010. [LINK]
    @inproceedings{Koyama:AES40Conf2010,
    author = {Shoichi Koyama and Yusuke Hiwasaki and Ken'ichi Furuya and Yoichi Haneda},
    title = {Inverse Wave Propagation in Wave Field Synthesis},
    booktitle = proc # {40th } # aes_conf,
    address = {Tokyo},
    month = {Oct.},
    year = {2010},
    category = {International Conferences},
    url = {http://www.aes.org/e-lib/browse.cfm?elib=15530},
    lang = {en}
    }

  • S. Koyama and R. Suzuki, “Scape synthesis: generation of a novel acoustical space based on auditory perceptual features,” in Proceedings of the 2009 international computer music conference (ICMC), Montreal, Aug. 2009, pp. 533-536. [PDF] [Movie]
    @inproceedings{Koyama:ICMC2008,
    author = {Shoichi Koyama and Risa Suzuki},
    title = {Scape Synthesis: Generation of a Novel Acoustical Space Based on Auditory Perceptual Features},
    booktitle = {Proceedings of the 2009 International Computer Music Conference ({ICMC})},
    pages = {533--536},
    address = {Montreal},
    month = {Aug.},
    year = {2009},
    movie = {https://www.youtube.com/watch?v=sJz010zBBdE},
    category = {International Conferences},
    lang = {en}
    }

  • S. Koyama, T. Kurihara, and S. Ando, “A direct algebraic method of instantaneous wave source localization,” in Proceedings of SICE annual conference, Aug. 2008, pp. 532-537. [LINK]
    @inproceedings{Koyama:SICE_Conf2008,
    author = {Shoichi Koyama and Toru Kurihara and Shigeru Ando},
    title = {A Direct Algebraic Method of Instantaneous Wave Source Localization},
    booktitle = {Proceedings of {SICE} Annual Conference},
    pages = {532--537},
    adress = {Tokyo},
    month = {Aug.},
    year = {2008},
    category = {International Conferences},
    url = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=4654713},
    lang = {en}
    }

  • S. Ando, S. Koyama, N. Ono, and N. Ikeuchi, “Silicon cochlear microphone “fishbone” with complex filtering and hilbert transform capability for instantaneous signal detection and analysis,” in Proceedings of transducers ’07, Lyon, Jun. 2007, pp. 1295-1298. [LINK]
    @inproceedings{Koyama:Transducers2007,
    author = {Shigeru Ando and Shoichi Koyama and Nobutaka Ono and Naoki Ikeuchi},
    title = {Silicon Cochlear Microphone ``Fishbone'' with Complex Filtering and Hilbert Transform Capability for Instantaneous Signal Detection and Analysis},
    booktitle = {Proceedings of Transducers '07},
    pages = {1295--1298},
    address = {Lyon},
    month = {Jun.},
    year = {2007},
    category = {International Conferences},
    url = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=4300375},
    lang = {en}
    }

Other Talks

  • S. Koyama, N. Murata, and H. Saruwatari, “Super-resolution in sound field recording and reproduction based on sparse representation,” in 5th joint meeting of the acoustical society of america and acoustical society of japan, Honolulu, Nov. 2016. [LINK]
    @inproceedings{Koyama:ASA_ASJ_joint2016,
    author = {Shoichi Koyama and Naoki Murata and Hiroshi Saruwatari},
    title = {Super-resolution in sound field recording and reproduction based on sparse representation},
    booktitle = {5th Joint Meeting of the Acoustical Society of America and Acoustical Society of Japan},
    month = {Nov.},
    address = {Honolulu},
    year = {2016},
    url = {http://scitation.aip.org/content/asa/journal/jasa/140/4/10.1121/1.4969760},
    category = {International Conferences},
    lang = {en}
    }

  • S. Koyama, “Source-location-informed sound field recording and reproduction: a generalization to arrays of arbitrary geometry,” in Proceedings of 2016 AES international conference on sound field control, Guildford, Jul. 2016. [LINK]
    @inproceedings{Koyama:AESconf2016SFC,
    author = {Shoichi Koyama},
    title = {Source-Location-Informed Sound Field Recording and Reproduction: A Generalization to Arrays of Arbitrary Geometry},
    booktitle = proc # {2016 } # aes_conf # { on Sound Field Control},
    month = {Jul.},
    address = {Guildford},
    year = {2016},
    url = {http://www.aes.org/e-lib/browse.cfm?elib=18303},
    category = {International Conferences},
    lang = {en}
    }

  • S. Koyama, A. Matsubayashi, N. Murata, and H. Saruwatari, “Sparse sound field decomposition using group sparse bayesian learning,” in Asia-pacific signal and information processing association annual summit and conference (APSIPA ASC), Hong Kong, Dec. 2015, pp. 850-855. [LINK] [PDF]
    @inproceedings{Koyama:APSIPA2015,
    author = {Shoichi Koyama and Atsushi Matsubayashi and Naoki Murata and Hiroshi Saruwatari},
    title = {Sparse Sound Field Decomposition Using Group Sparse Bayesian Learning},
    booktitle = {Asia-Pacific Signal and Information Processing Association Annual Summit and Conference ({APSIPA ASC})},
    month = {Dec.},
    address = {Hong Kong},
    year = {2015},
    pages = {850--855},
    url = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=7415391},
    pdf = {http://www.apsipa.org/proceedings_2015/pdf/239.pdf},
    category = {International Conferences},
    lang = {en}
    }

  • S. Koyama, “Sound field recording and reproduction and its extension to super-resolution,” in IEEE NZ Central Section Invited Lecture, Victoria University of Wellington, Apr. 2015. [PPT]
    @inproceedings{Koyama:Wellington_talk2015,
    author = {Shoichi Koyama},
    title = {Sound Field Recording and Reproduction and Its Extension to Super-resolution},
    booktitle = {{IEEE NZ Central Section Invited Lecture}, {Victoria University of Wellington}},
    day = {17},
    month = {Apr.},
    year = {2015},
    ppt = {http://www.sh01.org/wp-content/papercite-data/ppt/koyama-nz-seminar2015.pdf},
    category = {Talks},
    lang = {en}
    }

  • S. Koyama, “Sound field recording and reproduction and its extension to super-resolution,” in IEEE NZ North Section Technical seminar, University of Auckland, Apr. 2015. [PPT]
    @inproceedings{Koyama:Auckland_talk2015,
    author = {Shoichi Koyama},
    title = {Sound Field Recording and Reproduction and Its Extension to Super-resolution},
    booktitle = {{IEEE NZ North Section Technical seminar}, {University of Auckland}},
    day = {16},
    month = {Apr.},
    year = {2015},
    ppt = {http://www.sh01.org/wp-content/papercite-data/ppt/koyama-nz-seminar2015.pdf},
    category = {Talks},
    lang = {en}
    }

Dissertation

  • S. Koyama, “Boundary integral approach to sound field transform and reproduction,” PhD Thesis, Graduate School of Information Science and Technology, the University of Tokyo, 2014. [LINK] [PDF]
    @phdthesis{Koyama:phd,
    author = {Shoichi Koyama},
    title = {Boundary Integral Approach to Sound Field Transform and Reproduction},
    school = {Graduate School of Information Science and Technology, the University of Tokyo},
    year = {2014},
    pdf = {http://www.sp.ipc.i.u-tokyo.ac.jp/wp-content/papercite-data/koyama/koyama-phd.pdf},
    url = {http://hdl.handle.net/2261/58477},
    category = {Dissertation},
    lang = {en}
    }

  • S. Koyama, “Direct algebraic approach to wave source localization based on weighted integral method,” Master’s Thesis, Graduate School of Information Science and Technology, the University of Tokyo, 2009. (in Japanese)
    @mastersthesis{Koyama:master_en,
    author = {Shoichi Koyama},
    title = {Direct Algebraic Approach to Wave Source Localization Based on Weighted Integral Method},
    school = {Graduate School of Information Science and Technology, the University of Tokyo},
    year = {2009},
    category = {Dissertation},
    note = {(in Japanese)},
    lang = {ja}
    }