原著論文

  • Y. Takida, S. Koyama, N. Ueno, and H. Saruwatari, “Reciprocity gap functional in spherical harmonic domain for gridless sound field decomposition,” Elsevier Signal Processing, vol. 169, 2020. [LINK]
  • Y. Mitsufuji, S. Uhlich, N. Takamune, D. Kitamura, S. Koyama, and H. Saruwatari, “Multichannel Non-Negative Matrix Factorization Using Banded Spatial Covariance Matrices in Wavenumber Domain,” IEEE/ACM Transactions on Audio, Speech, and Language Processing, vol. 28, pp. 49-60, 2020. [LINK]
  • N. Ueno, S. Koyama, and H. Saruwatari, “Three-Dimensional Sound Field Reproduction Based on Weighted Mode-Matching Method,” IEEE/ACM Transactions on Audio, Speech, and Language Processing, vol. 27, no. 12, pp. 1852-1867, 2019. [LINK] [PDF]
  • S. Koyama and L. Daudet, “Sparse Representation of a Spatial Sound Field in a Reverberant Environment,” IEEE Journal of Selected Topics in Signal Processing, vol. 13, no. 1, pp. 172-184, 2019. [LINK] [PDF]
  • S. Koyama, N. Murata, and H. Saruwatari, “Sparse Sound Field Decomposition for Super-resolution in Recording and Reproduction,” Journal of the Acoustical Society of America, vol. 143, no. 6, pp. 3780-3895, 2018. [LINK] [PDF]
  • N. Murata, S. Koyama, N. Takamune, and H. Saruwatari, “Sparse Representation Using Multidimensional Mixed-Norm Penalty With Application to Sound Field Decomposition,” IEEE Transactions on Signal Processing, vol. 66, no. 12, pp. 3327-3338, 2018. [LINK] [PDF] [Code]
  • 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] [Code]
  • 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] [Code]
  • 羽田 陽一, 古家 賢一, 小山 翔一, and 丹羽 健太, “球面調和関数展開に基づく2 種類の超接話マイクロホンアレイ,” 電子情報通信学会論文誌A, vol. J97-A, no. 4, pp. 264-273, 2014. [LINK]
  • 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] [PDF]
  • 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)
  • 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]
  • 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] [Code]
  • 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]  [電気通信普及財団, テレコムシステム技術賞]
  • 小山 翔一, 栗原 徹, and 安藤 繁, “波動場の小領域観測による瞬時波源定位の理論と実験的検証,” 電気学会論文誌E, vol. 129-E, no. 10, pp. 350-356, 2009. [LINK]  [電気学会, センサ・マイクロマシン部門 奨励論文賞]

レター

  • N. Ueno, S. Koyama, and H. Saruwatari, “Sound Field Recording Using Distributed Microphones Based on Harmonic Analysis of Infinite Order,” IEEE Signal Processing Letters, vol. 25, no. 1, pp. 135-139, 2018. [LINK] [PDF] [Code]
  • 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]

総説/解説論文

  • S. Koyama, “Sparsity-based sound field reconstruction,” Acoustical Science and Technology, vol. 41, no. 1, pp. 269-275, 2020. [LINK] [PDF]
  • S. Koyama, G. Chardon, and L. Daudet, “Optimizing Source and Sensor Placement for Sound Field Control: An Overview,” IEEE/ACM Transactions on Audio, Speech, and Language Processing, vol. 28, pp. 686-714, 2020. [LINK] [PDF] [Code]
  • 小山 翔一, “未来の音の収録・再生・編集技術の実現に向けて(創立100周年記念特集 「基礎・境界」が支えた100年,これからの100年),” 電子情報通信学会誌, vol. 100, no. 6, pp. 474-478, 2017. [LINK] [PDF] (Copyright © 2017 IEICE)
  • 小山 翔一, “スパース音場表現に基づく超解像型収音・再現 (<小特集>スパース表現に基づく音響信号処理),” 日本音響学会誌, vol. 71, no. 11, pp. 632-638, 2015. [LINK] [PDF]
  • 古家 賢一 and 小山 翔一, “波面合成技術の原理と応用 (特集: 立体音響技術),” 映像情報メディア学会誌, vol. 68, no. 8, pp. 621-624, 2014. [LINK] [PDF]
  • 小山 翔一, “音場再現技術における数理問題: 波面合成・高次アンビソニックスの数理 (<小特集>近年の音響信号処理における数理科学の進展),” 日本音響学会誌, vol. 68, no. 11, pp. 584-589, 2012. [LINK] [PDF]

書籍

  • 小山 翔一, “Q01 サンプリング定理をやさしく教えてください,” in 音響学入門ペディア, 羽田 陽一, 大川 茂樹, and 木谷 俊介, Eds., コロナ社, 2017. [LINK]
  • 小山 翔一, “波面再構成フィルタに基づくリアルタイム音場伝送,” in 感覚デバイス開発 〜機器が担うヒト感覚の生成・拡張・代替技術〜, エヌ・ティー・エス, 2014, pp. 123-132. [LINK]

その他記事

  • 小山 翔一, “サイバースペースにおける空間 (ちょっとしたエッセイ, コーヒーブレーク),” 日本音響学会誌, vol. 70, no. 4, p. 231, 2014. [LINK] [PDF]
  • 小山 翔一, “「動きが生命をつくる –生命と意識への構成論的アプローチ–」池上高志著, 青土社 (私のすすめるこの一冊, コーヒーブレーク),” 日本音響学会誌, vol. 68, no. 4, pp. 209-210, 2012. [LINK] [PDF]

招待/セミナー講演

  • H. Ito, S. Koyama, N. Ueno, and H. Saruwatari, “Spatial Active Noise Control Based on Kernel Interpolation With Directional Weighting,” in Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), 2020, pp. 8399-8403. [LINK] [PPT]
  • 小山 翔一, “スピーカ再生による空間音響 〜音場収音・再生技術の基礎〜,” in 日本音響学会秋季研究発表会, ビギナーズセミナー:空間音響ことはじめ, 2019. [PPT]
  • Y. Takida, S. Koyama, N. Ueno, and H. Saruwatari, “Comparison of Interpolation Methods for Gridless Sound Field Decomposition Based on Reciprocity Gap Functional,” in Proceedings of International Congress on Sound and Vibration (ICSV), Montreal, 2019.
  • 小山 翔一, “無限次元調和解析に基づく分散配置マイクロフォンを用いた音場計測,” in 三大学合同シンポジウム:次世代音響センシング理論とその実世界応用, 2019. [PPT]
  • S. Koyama, “Sparsity-based sound field reconstruction,” in Tohoku Universal Acoustical Communication Month, Seminar on the spatial aspects of hearing and their applications, keynote lecture, Sendai, 2018. [PPT]
  • 小山 翔一, “音場再現技術の最近の進展,” in ソニー株式会社, セミナー講演, 2018. [PPT]
  • S. Koyama, “Sparsity-Aware Sound Field Recording / Joint Source and Sensor Placement for Sound Field Control,” in Microsoft Research Lab, Redmond, seminar talk, 2018. [PPT] [Movie]
  • S. Koyama, “Sound field recording and reproduction using small number of microphones and loudspeakers,” in University of Southampton, Institute of Sound and Vibration Research (ISVR), seminar talk, 2017. [PPT]
  • S. Koyama, N. Murata, and H. Saruwatari, “Effect of Multipole Dictionary in Sparse Sound Field Decomposition For Super-resolution in Recording and Reproduction,” in Proceedings of International Congress on Sound and Vibration (ICSV), London, 2017. [PDF]
  • 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, 2016. [LINK] [PPT]
  • 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, 2016. [LINK] [PPT]
  • S. Koyama, A. Matsubayashi, N. Murata, and H. Saruwatari, “Sparse Sound Field Decomposition Using Group Sparse Bayesian Learning,” in Proceedings of Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC), Hong Kong, 2015, pp. 850-855. [LINK] [PDF]
  • 小山 翔一, “スパース信号表現って何?,” in 日本音響学会秋季研究発表会, ビギナーズセミナー:今話題のあの技術ってどうなってるの?, 2015.
  • S. Koyama, “Sound Field Recording and Reproduction and Its Extension to Super-resolution,” in IEEE NZ Central Section Invited Lecture, Victoria University of Wellington, 2015. [PPT]
  • S. Koyama, “Sound Field Recording and Reproduction and Its Extension to Super-resolution,” in IEEE NZ North Section Technical seminar, University of Auckland, 2015. [PPT]
  • 猿渡 洋 and 小山 翔一, “音響メディアにおける新しい統計的信号処理とその応用,” in 日立製作所 中央研究所, セミナー講演, 2014.
  • 小山 翔一, “音場再現技術の基本原理と展開,” in 音学シンポジウム2014 (研究報告音楽情報科学/電子情報通信学会技術研究報告), 2014. [LINK] [PPT] [Movie]
  • 小山 翔一, “波面再構成フィルタに基づくリアルタイム波面合成技術,” in 電気学会 第6回 インタラクティブディスプレイ協同研究委員会, 2013.

国際会議

  • T. Nishida, N. Ueno, S. Koyama, and H. Saruwatari, “Sensor placement in arbitrarily restricted region for field estimation based on Gaussian process,” in Proceedings of European Signal Processing Conference (EUSIPCO), Amsterdam, 2021. (to appear)
  • N. Iijima, S. Koyama, and H. Saruwatari, “Binaural Rendering From Distributed Microphone Signals Considering Loudspeaker Distance in Measurements,” in Proceedings of IEEE International Workshop on Multimedia Signal Processing (MMSP), Tampere, 2020. (to appear)
  • J. G. C. Ribeiro, N. Ueno, S. Koyama, and H. Saruwatari, “Kernel Interpolation of Acoustic Transfer Function Between Regions Considering Reciprocity,” in Proceedings of IEEE Sensor Array and Multichannel Signal Processing Workshop (SAM), 2020. [LINK]
  • K. Ariga, T. Nishida, S. Koyama, N. Ueno, and H. Saruwatari, “Mutual-Information-Based Sensor Placement for Spatial Sound Field Recording,” in Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), 2020, pp. 166-170. [LINK] [PPT]
  • H. Ito, S. Koyama, N. Ueno, and H. Saruwatari, “Spatial Active Noise Control Based on Kernel Interpolation With Directional Weighting,” in Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), 2020, pp. 8399-8403. [LINK] [PPT]  [Invited]
  • M. Nakanishi, N. Ueno, S. Koyama, and H. Saruwatari, “Two-Dimensional Sound Field Recording With Multiple Circular Microphone Arrays Considering Multiple Scattering,” in Proceedings of IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA), New Paltz, 2019, pp. 363-367. [LINK]
  • H. Ito, S. Koyama, N. Ueno, and H. Saruwatari, “Three-Dimensional Spatial Active Noise Control Based on Kernel-Induced Sound Field Interpolation,” in Proceedings of International Congress on Acoustics (ICA), Aachen, 2019, pp. 1101-1108. [LINK] [PDF]
  • Y. Takida, S. Koyama, N. Ueno, and H. Saruwatari, “Comparison of Interpolation Methods for Gridless Sound Field Decomposition Based on Reciprocity Gap Functional,” in Proceedings of International Congress on Sound and Vibration (ICSV), Montreal, 2019.  [Invited]
  • H. Ito, S. Koyama, N. Ueno, and H. Saruwatari, “Feedforward Spatial Active Noise Control Based on Kernel Interpolation of Sound Field,” in Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Brighton, 2019, pp. 511-515. [LINK]  [Best Student Paper Award, IEEE SPS Japan Student Conference Paper Award]
  • Y. Takida, S. Koyama, N. Ueno, and H. Saruwatari, “Robust Gridless Sound Field Decomposition Based on Structured Reciprocity Gap Functional in Spherical Harmonic Domain,” in Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Brighton, 2019, pp. 581-585. [LINK]
  • S. Koyama, “Sparsity-based sound field reconstruction,” in Tohoku Universal Acoustical Communication Month, Seminar on the spatial aspects of hearing and their applications, keynote lecture, Sendai, 2018. [PPT]  [Invited]
  • Y. Takida, S. Koyama, and H. Saruwatari, “Exterior and Interior Sound Field Separation Using Convex Optimization: Comparison of Signal Models,” in Proceedings of European Signal Processing Conference (EUSIPCO), Rome, 2018, pp. 2567-2571. [LINK]
  • N. Ueno, S. Koyama, and H. Saruwatari, “Kernel Ridge Regression With Constraint of Helmholtz Equation for Sound Field Interpolation,” in Proceedings of International Workshop on Acoustic Signal Enhancement (IWAENC), Tokyo, 2018, pp. 436-440. [LINK]
  • Y. Takida, S. Koyama, N. Ueno, and H. Saruwatari, “Gridless Sound Field Decomposition Based on Reciprocity Gap Functional in Spherical Harmonic Domain,” in Proceedings of IEEE Sensor Array and Multichannel Signal Processing Workshop (SAM), Sheffield, 2018, pp. 627-631. [LINK] [PPT]  [Best Student Paper Award, ONRG sponsored student travel grants]
  • N. Ueno, S. Koyama, and H. Saruwatari, “Sound Field Reproduction with Exterior Radiation Cancellation Using Analytical Weighting of Harmonic Coefficients,” in Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Calgary, 2018, pp. 466-470. [LINK] [PPT]  [IEEE SPS Japan Student Conference Paper Award]
  • S. Koyama, G. Chardon, and L. Daudet, “Joint Source and Sensor Placement for Sound Field Control Based on Empirical Interpolation Method,” in Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Calgary, 2018, pp. 501-505. [LINK] [PPT]
  • S. Koyama and L. Daudet, “Comparison of Reverberation Models for Sparse Sound Field Decomposition,” in Proceedings of IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA), New Paltz, 2017, pp. 214-218. [LINK]
  • S. Koyama, N. Murata, and H. Saruwatari, “Effect of Multipole Dictionary in Sparse Sound Field Decomposition For Super-resolution in Recording and Reproduction,” in Proceedings of International Congress on Sound and Vibration (ICSV), London, 2017. [PDF]  [Invited]
  • 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), San Francisco, 2017, pp. 196-200. [LINK]
  • 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), New Orleans, 2017, pp. 111-115. [LINK]
  • 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), New Orleans, 2017, pp. 441-445. [LINK]
  • 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 Proceedings of Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC), Jeju, 2016. [LINK] [PDF]  [Invited]
  • 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, 2016. [LINK] [PPT]  [Invited]
  • H. Nakajima, D. Kitamura, N. Takamune, S. Koyama, H. Saruwatari, N. Ono, Y. Takahashi, 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, 2016, pp. 1143-1147. [LINK] [PDF]
  • 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, 2016, pp. 1648-1652. [LINK] [PDF]
  • 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, 2016. [LINK] [PPT]  [Invited]
  • 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, 2016, pp. 395-399. [LINK]
  • 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, 2016, pp. 56-60. [LINK]
  • 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, 2016, pp. 345-349. [LINK]
  • S. Koyama, A. Matsubayashi, N. Murata, and H. Saruwatari, “Sparse Sound Field Decomposition Using Group Sparse Bayesian Learning,” in Proceedings of Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC), Hong Kong, 2015, pp. 850-855. [LINK] [PDF]  [Invited]
  • N. Murata, S. Koyama, N. Takamune, and H. Saruwatari, “Sparse Sound Field Decomposition with Parametric Dictionary Learning for Super-Resolution Recording and Reproduction,” in Proceedings of IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing (CAMSAP), Cancun, 2015, pp. 69-72. [LINK]
  • 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, 2015. [LINK] [Code]
  • 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, 2015, pp. 494-498. [LINK]
  • 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, 2015, pp. 619-623. [LINK]
  • 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, 2014, pp. 309-313. [LINK]
  • 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, 2014, pp. 604-608. [LINK]
  • 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, 2014, pp. 4443-4447. [LINK]
  • 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, 2013. [LINK]
  • 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, 2013. [LINK]
  • 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, 2013, p. 224. [LINK]
  • 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, 2013, pp. 276-280. [LINK]
  • 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, 2013, pp. 271-275. [LINK]
  • 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, 2012. [LINK]
  • 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, 2012. [LINK]
  • 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]
  • 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, 2011. [LINK]
  • 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, 2011, pp. 5-8. [LINK]
  • 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, 2011, pp. 1322-1326. [PDF]
  • S. Koyama, Y. Hiwasaki, K. Furuya, and Y. Haneda, “Inverse Wave Propagation in Wave Field Synthesis,” in Proceedings of 40th AES International Conference, Tokyo, 2010. [LINK]
  • 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, 2009, pp. 533-536. [PDF] [Movie]
  • S. Koyama, T. Kurihara, and S. Ando, “A Direct Algebraic Method of Instantaneous Wave Source Localization,” in Proceedings of SICE Annual Conference, 2008, pp. 532-537. [LINK]
  • 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, 2007, pp. 1295-1298. [LINK]

国内会議

  • 飯島 尚仁, 小山 翔一, and 猿渡 洋, “HRTF測定距離を考慮した分散マイクロフォンアレイ信号からのバイノーラル信号生成,” in 日本音響学会春季研究発表会講演論文集, 2020, pp. 229-232.
  • 植野 夏樹, 小山 翔一, and 猿渡 洋, “微分可能な凸損失関数を用いたオーバーサンプリングされたクリップ信号の復元,” in 電子情報通信学会技術研究報告, 2020, pp. 147-152.
  • 西田 智哉, 植野 夏樹, 小山 翔一, and 猿渡 洋, “ガウス過程に基づく場の計測のための推定・候補領域を独立に設定可能なセンサ配置法,” in 電子情報通信学会技術研究報告, 2020, pp. 141-146.
  • J. G. C. Ribeiro, N. Ueno, S. Koyama, and H. Saruwatari, “Region-to-region acoustic transfer function estimation with distributed sources and receivers based on kernel interpolation,” in 電子情報通信学会技術研究報告, 2020, pp. 83-88.
  • 伊東 勇登, 小山 翔一, 植野 夏樹, and 猿渡 洋, “音場のカーネル補間に基づくフィードバック型三次元空間能動騒音制御,” in 日本音響学会秋季研究発表会講演論文集, 2019, pp. 183-186.  [日本音響学会, 学生優秀発表賞]
  • 伊東 勇登, 小山 翔一, 植野 夏樹, and 猿渡 洋, “音場の補間に基づく分散配置マイクロフォンを用いたフィードフォワード型空間能動騒音制御,” in 日本音響学会春季研究発表会講演論文集, 2019, pp. 279-282. [PDF]
  • 瀧田 雄太, 小山 翔一, 植野 夏樹, and 猿渡 洋, “Annihilatingフィルタを用いた球面調和関数領域reciprocity gap functional: 複数周波数を用いたグリッドレス音場分解,” in 第33回 信号処理シンポジウム, 2018, pp. 184-189.
  • 瀧田 雄太, 小山 翔一, 植野 夏樹, and 猿渡 洋, “球面調和領域におけるreciprocity gap functional に基づくグリッドレス音場分解に関する実験的評価,” in 日本音響学会秋季研究発表会講演論文集, 2018, pp. 341-344.
  • 植野 夏樹, 小山 翔一, and 猿渡 洋, “微分で求める!積分を用いない高次アンビソニックス係数の導出,” in 日本音響学会秋季研究発表会講演論文集, 2018, pp. 307-310.
  • 植野 夏樹, 小山 翔一, and 猿渡 洋, “調和スペクトルの解析的重み付けに基づく音場再現と放射抑圧,” in 日本音響学会春季研究発表会講演論文集, 2018, pp. 485-488.
  • 小山 翔一, G. Chardon, and L. Daudet, “Empirical interpolation method に基づく音場制御における音源・センサ配置法,” in 日本音響学会春季研究発表会講演論文集, 2018, pp. 481-484. [PDF]
  • 瀧田 雄太, 小山 翔一, and 猿渡 洋, “内部・外部音場分離のための信号モデルの比較,” in 日本音響学会春季研究発表会講演論文集, 2018, pp. 469-472.
  • 瀧田 雄太, 小山 翔一, 植野 夏樹, and 猿渡 洋, “凸最適化による信号分離を用いたグリッドレス音場分解の性能向上,” in 電子情報通信学会技術研究報告, 2018, pp. 19-24.
  • 瀧田 雄太, 小山 翔一, 植野 夏樹, and 猿渡 洋, “複数球状マイクロフォンアレイを用いたグリッドレス音場分解の検討,” in 日本音響学会秋季研究発表会講演論文集, 2017, pp. 447-450.  [日本音響学会, 学生優秀発表賞]
  • 植野 夏樹, 小山 翔一, and 猿渡 洋, “無限次元調和解析に基づく音場補間とそのカーネル回帰としての解釈,” in 日本音響学会秋季研究発表会講演論文集, 2017, pp. 453-456. [PDF]
  • 植野 夏樹, 小山 翔一, and 猿渡 洋, “受聴エリア事前情報を用いた音場再現 ~ 任意のスピーカ配置と指向特性における検証 ~,” in 電子情報通信学会技術研究報告, 2017, pp. 7-12.  [音響・超音波サブソサイエティ 学生研究奨励賞]
  • 中嶋 広明, 北村 大地, 高宗 典玄, 小山 翔一, 猿渡 洋, 小野 順貴, 高橋 祐, and 近藤 多伸, “全極モデルを用いた基底変形型教師ありNMFにおける変形自由度に関する研究,” in 電子情報通信学会技術研究報告, 2016, pp. 13-18.
  • 村田 直毅, 小山 翔一, 高宗 典玄, and 猿渡 洋, “音源信号の特性を考慮した時空間スパース音場分解の検討,” in 第31回 信号処理シンポジウム, 2016, pp. 311-316.
  • 植野 夏樹, 小山 翔一, and 猿渡 洋, “受聴エリア事前情報を用いた音場再現 –直線状アレイによる検証–,” in 日本音響学会秋季研究発表会講演論文集, 2016, pp. 415-418.  [日本音響学会, 学生優秀発表賞]
  • 村田 直毅, 小山 翔一, 高宗 典玄, and 猿渡 洋, “多重極辞書を用いたスパース音場分解の検討,” in 日本音響学会秋季研究発表会講演論文集, 2016, pp. 393-396.
  • 束村 陽, 小山 翔一, and 猿渡 洋, “残響環境下音場分解のための信号モデルと分離アルゴリズムの検討,” in 日本音響学会秋季研究発表会講演論文集, 2016, pp. 389-392.
  • 中嶋 広明, 北村 大地, 高宗 典玄, 小山 翔一, 猿渡 洋, 小野 順貴, 高橋 祐, and 近藤 多伸, “時変な全極モデルを用いた基底変形型教師ありNMF による音楽信号分離,” in 日本音響学会春季研究発表会講演論文集, 2016, pp. 635-638.
  • 村田 直毅, 亀岡 弘和, 木下 慶介, 荒木 章子, 中谷 智広, 小山 翔一, and 猿渡 洋, “非負値テンソル二重逆畳み込みによる残響環境下の劣決定音源分離,” in 日本音響学会春季研究発表会講演論文集, 2016, pp. 623-626.
  • 高田 一真, 北村 大地, 中嶋 広明, 小山 翔一, 猿渡 洋, 小野 順貴, and 牧野 昭二, “教師あり多チャネルNMFと統計的音声強調を用いた柔軟索状ロボットにおける音源分離,” in 日本音響学会春季研究発表会講演論文集, 2016, pp. 609-612.
  • 伊藤 光一郎, 小山 翔一, and 猿渡 洋, “音源位置事前情報を用いた球状アレイによる音場収音・再現,” in 日本音響学会春季研究発表会講演論文集, 2016, pp. 771-774.
  • 中嶋広明, 北村 大地, 高宗 典玄, 小山 翔一, 猿渡 洋, 小野 順貴, 高橋 祐, and 近藤 多伸, “全極モデルを用いた基底変形型教師ありNMFによる音楽信号分離,” in 日本音響学会秋季研究発表会講演論文集, 2015, pp. 573-576.  [日本音響学会, 学生優秀発表賞]
  • 村田 直毅, 小山 翔一, 亀岡 弘和, 高宗 典玄, and 猿渡 洋, “スパース音場分解における時間周波数領域低ランクモデルの導入,” in 日本音響学会秋季研究発表会講演論文集, 2015, pp. 569-572.  [日本音響学会, 学生優秀発表賞]
  • 小山 翔一 and 猿渡 洋, “スパース性と低ランク性に基づく信号表現による音場分解,” in 日本音響学会秋季研究発表会講演論文集, 2015, pp. 565-568.
  • 小山 翔一 and 猿渡 洋, “球・円状マイクロフォンアレイ信号からバイノーラル信号への変換に対する解析的アプローチ,” in 日本音響学会秋季研究発表会講演論文集, 2015, pp. 685-686.
  • 村田 直毅, 小山 翔一, 高宗 典玄, and 猿渡 洋, “スパース音場分解とパラメトリック辞書学習による超解像型収音・再現,” in 日本音響学会秋季研究発表会講演論文集, 2015, pp. 671-674.
  • 小山 翔一, 村田 直毅, and 猿渡 洋, “超解像型音場収音・再現のためのグループスパース信号表現と分解アルゴリズム,” in 日本音響学会春季研究発表会講演論文集, 2015, pp. 639-642.
  • 室田 勇騎, 北村 大地, 小山 翔一, 猿渡 洋, and 中村 哲, “時系列事前分布モデルとスペクトル基底の同時適応を用いたバイノーラル音源分離の実験的評価,” in 日本音響学会春季研究発表会講演論文集, 2015, pp. 549-552.
  • 小山 翔一, 古家 賢一, 羽田 陽一, and 猿渡 洋, “音源位置事前情報を用いた超解像型音場収音・再現における空間相関分布の導入,” in 日本音響学会春季研究発表会講演論文集, 2015, pp. 635-638.
  • 室田 勇騎, 北村 大地, 小山 翔一, 猿渡 洋, and 中村 哲, “バイノーラル音源分離における時系列事前分布モデルとスペクトル基底の同時適応,” in 電子情報通信学会技術研究報告, 2015, pp. 27-32.
  • 室田 勇騎, 北村 大地, 小山 翔一, 猿渡 洋, and 中村 哲, “チャネル別事前分布推定と両耳共通スペクトルゲインを用いた定位保持型バイノーラル音源分離,” in 第29回 信号処理シンポジウム, 2014, pp. 486-491.
  • 小山 翔一, 島内 末廣, and 猿渡 洋, “超解像型音場収音・再現のためのスパース音場表現とパラメトリック辞書学習,” in 第29回 信号処理シンポジウム, 2014, pp. 478-483.
  • 室田 勇騎, 北村 大地, 小山 翔一, 猿渡 洋, and 中村 哲, “バイノーラル信号音源分離における両耳事前分布モデルの考察,” in 日本音響学会秋季研究発表会講演論文集, 2014, pp. 595-598.  [日本音響学会, 学生優秀発表賞]
  • 小山 翔一, 島内 末廣, and 大室 仲, “スパース音場表現に基づく音場収音・再現の超解像化,” in 日本音響学会秋季研究発表会講演論文集, 2014, pp. 571-574.
  • 小山 翔一, “音場再現技術の基本原理と展開,” in 音学シンポジウム2014 (研究報告音楽情報科学/電子情報通信学会技術研究報告), 2014. [LINK] [PPT] [Movie]  [Invited]
  • J. Trevino, S. Koyama, S. Sakamoto, and Y. Suzuki, “Robustness of Spherical and Cylindrical Microphone Arrays in Harmonic Beamforming Applications,” in 電子情報通信学会技術研究報告, 2014, pp. 37-42.
  • 若山 圭吾, 小山 翔一, 島内 末廣, and 大室 仲, “一般化N次元主成分分析によるマルチチャネル音響信号の時間階層型次元削減,” in 日本音響学会春季研究発表会講演論文集, 2014, pp. 831-832.
  • 小山 翔一, P. Srivastava, 古家 賢一, 島内 末廣, and 大室 仲, “STSP: Space-time Stretched Pulseを用いた時空間インパルス応答測定法,” in 日本音響学会春季研究発表会講演論文集, 2014, pp. 899-902.
  • トレビーニョ ホルヘ, 小山 翔一, 坂本 修一, and 鈴木 陽一, “3D Cylindrical Ambosonics: Encoding Sound Field Information Using the Cylindrical Harmonic Functions,” in 日本音響学会秋季研究発表会講演論文集, 2013, pp. 723-726.
  • 小山 翔一, 古家 賢一, 日和崎 祐介, and 羽田 陽一, “音源位置事前情報を用いた音圧-駆動信号変換に基づく音場再現,” in 日本音響学会秋季研究発表会講演論文集, 2013, pp. 679-682.
  • 羽田 陽一, 古家 賢一, 小山 翔一, and 丹羽 健太, “球面調和関数展開による音圧内挿を用いた超接話マイクロホンアレイ,” in 日本音響学会秋季研究発表会講演論文集, 2013, pp. 611-612.
  • 高田 英明, 伊達 宗和, 小山 翔一, 小澤 史朗, 三枝 知史, and 小島 明, “3D 映像音響システムによる遠隔地間の空間共有,” in 3次元画像コンファレンス講演論文集, 2013, pp. 89-92.
  • 小山 翔一, 古家 賢一, 日和崎 祐介, and 羽田 陽一, “球・円状マイクロホン・スピーカアレイのための波面再構成フィルタ,” in 日本音響学会春季研究発表会講演論文集, 2013, pp. 679-682.
  • 小山 翔一, T. Lee, 古家 賢一, 日和崎 祐介, and 羽田 陽一, “円調和ビームフォーミングによる波面再構成フィルタの残響環境下性能改善,” in 日本音響学会春季研究発表会講演論文集, 2013, pp. 861-862.
  • トレビーニョ ホルヘ, 小山 翔一, 坂本 修一, and 鈴木 陽一, “Scalable Encoding of Sound Field Recordings Made With Cylindrical Microphone Arrays,” in 日本音響学会春季研究発表会講演論文集, 2013, pp. 957-960.
  • 江村 暁, 小山 翔一, 古家 賢一, and 羽田 陽一, “波数領域における残留エコー消去法,” in 日本音響学会秋季研究発表会講演論文集, 2012, pp. 667-668.
  • 小山 翔一, 古家 賢一, 日和崎 祐介, 羽田 陽一, and 鈴木 陽一, “円筒状マイクロホン・スピーカアレーのための波面再構成フィルタ,” in 日本音響学会秋季研究発表会講演論文集, 2012, pp. 605-608.
  • 小山 翔一, 古家 賢一, 日和崎 祐介, and 羽田 陽一, “スピーカ指向性を考慮した時空間周波数領域での音場再現フィルタ設計手法,” in 日本音響学会春季研究発表会講演論文集, 2012, pp. 913-914.
  • 小山 翔一, 古家 賢一, 日和崎 祐介, and 羽田 陽一, “時空間スペクトルの位相シフトによる音場再現位置の制御,” in 日本音響学会秋季研究発表会講演論文集, 2011, pp. 637-638.
  • 小山 翔一, 古家 賢一, 日和崎 祐介, and 羽田 陽一, “音場収音・再現のための時空間周波数領域信号変換,” in 日本音響学会秋季研究発表会講演論文集, 2011, pp. 635-636.
  • 小山 翔一, 日和崎 祐介, 古家 賢一, and 羽田 陽一, “角度スペクトル微分を用いた波面合成法の実音場評価,” in 日本音響学会春季研究発表会講演論文集, 2011, pp. 741-742.  [日本音響学会, 粟屋潔 学術奨励賞]
  • 小山 翔一, 日和崎 祐介, 古家 賢一, and 羽田 陽一, “逆伝播演算による波面合成位置の操作,” in 日本音響学会秋季研究発表会講演論文集, 2010, pp. 751-752.
  • 小山 翔一, 日和崎 祐介, 古家 賢一, and 羽田 陽一, “角度スペクトル微分による音圧勾配取得に基づく波面合成法,” in 日本音響学会秋季研究発表会講演論文集, 2010, pp. 555-556.
  • 阪内 澄宇, 古家 賢一, 小山 翔一, and 羽田 陽一, “高臨場遠隔通信のためのサウンドウォールシステム,” in 日本音響学会春季研究発表会講演論文集, 2010, pp. 935-936.
  • 小山 翔一, 栗原 徹, and 安藤 繁, “空間荷重積分による瞬時波源定位と残響の時空間分解シミュレーション,” in 電気学会全国大会講演論文集 [3], 2009, p. 206.
  • 小山 翔一, 栗原 徹, and 安藤 繁, “偏微分方程式の空間荷重積分による波源定位の直接解法,” in 計測自動制御学会 第25回センシングフォーラム資料, 2009, pp. 25-29. [LINK]  [計測自動制御学会, 計測部門 研究技術奨励賞]
  • S. Koyama, T. Kurihara, and S. Ando, “Instantaneous Method of Wave Source Localization Based on Weighted Integral of Partial Differential Equation,” in Proceedings of IEEJ the 25th Sensor Symposium, 2008, pp. 667-670.
  • 小山 翔一, 栗原 徹, and 安藤 繁, “偏微分方程式の空間荷重積分による波源定位の直接解法: 理論とシミュレーション,” in 電子情報通信学会技術研究報告. SIP, 信号処理, 2008, pp. 37-42. [LINK]
  • 小山 翔一, 栗原 徹, and 安藤 繁, “偏微分方程式の空間荷重積分による瞬時音源定位,” in 日本音響学会秋季研究発表会講演論文集, 2008, pp. 679-682.
  • 小山 翔一, 栗原 徹, and 安藤 繁, “空間積分型音源恒等式による瞬時音源定位,” in 日本音響学会春季研究発表会講演論文集, 2008, pp. 711-714.
  • 小山 翔一, 安藤 繁, 小野 順貴, and 池内 直樹, ““Fishbone” 音響センサを用いるオンセンサ異常音抽出と無線伝送,” in 計測自動制御学会 第24回センシングフォーラム資料, 2007, pp. 377-382. [LINK]
  • S. Koyama, S. Ando, N. Ono, and N. Ikeuchi, “On-Sensor Abnormal Signal Detection and Wireless Transfer Using “Fishbone” Acoustic Sensor,” in Proceedings of IEEJ the 24th Sensor Symposium, 2007, pp. 51-54.

学位論文

  • S. Koyama, “Boundary Integral Approach to Sound Field Transform and Reproduction,” PhD Thesis, 2014. [LINK] [PDF]
  • 小山 翔一, “荷重積分法に基づく波源定位の直接代数法に関する研究,” Master Thesis, 2009.