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Journal Articles
- 2024
[j22]Takumi Fukami
, Tomoya Murata, Kenta Niwa, Iifan Tyou:
DP-Norm: Differential Privacy Primal-Dual Algorithm for Decentralized Federated Learning. IEEE Trans. Inf. Forensics Secur. 19: 5783-5797 (2024)- [j21]Haimin Zhang, Min Xu, Guoqiang Zhang, Kenta Niwa:
SSFG: Stochastically Scaling Features and Gradients for Regularizing Graph Convolutional Networks. IEEE Trans. Neural Networks Learn. Syst. 35(2): 2223-2234 (2024) - [j20]Iifan Tyou, Tomoya Murata, Takumi Fukami, Yuki Takezawa, Kenta Niwa:
A Localized Primal-Dual Method for Centralized/Decentralized Federated Learning Robust to Data Heterogeneity. IEEE Trans. Signal Inf. Process. over Networks 10: 94-107 (2024) - [j19]Kenta Niwa, Hiro Ishii, Hiroshi Sawada, Akinori Fujino, Noboru Harada, Rio Yokota:
Natural Gradient Primal-Dual Method for Decentralized Learning. IEEE Trans. Signal Inf. Process. over Networks 10: 417-433 (2024) - 2023
- [j18]Guoqiang Zhang, Kenta Niwa, W. Bastiaan Kleijn:
A DNN Optimizer that Improves over AdaBelief by Suppression of the Adaptive Stepsize Range. Trans. Mach. Learn. Res. 2023 (2023) - [j17]Yuki Takezawa, Han Bao, Kenta Niwa, Ryoma Sato, Makoto Yamada:
Momentum Tracking: Momentum Acceleration for Decentralized Deep Learning on Heterogeneous Data. Trans. Mach. Learn. Res. 2023 (2023) - [j16]Kenta Niwa, Naonori Ueda, Hiroshi Sawada, Akinori Fujino, Shoichiro Takeda, Guoqiang Zhang, W. Bastiaan Kleijn:
CoordiNet: Constrained Dynamics Learning for State Coordination Over Graph. IEEE Trans. Signal Inf. Process. over Networks 9: 242-257 (2023) - [j15]Yuki Takezawa, Kenta Niwa, Makoto Yamada:
Communication Compression for Decentralized Learning With Operator Splitting Methods. IEEE Trans. Signal Inf. Process. over Networks 9: 581-595 (2023) - 2022
- [j14]Guoqiang Zhang, Kenta Niwa, W. Bastiaan Kleijn:
Revisiting the Primal-Dual Method of Multipliers for Optimisation Over Centralised Networks. IEEE Trans. Signal Inf. Process. over Networks 8: 228-243 (2022) - 2021
- [j13]Ryotaro Sato, Kenta Niwa, Kazunori Kobayashi:
Ambisonic Signal Processing DNNs Guaranteeing Rotation, Scale and Time Translation Equivariance. IEEE ACM Trans. Audio Speech Lang. Process. 29: 1449-1462 (2021) - 2020
- [j12]Kenta Niwa, Hironobu Chiba, Noboru Harada, Guoqiang Zhang, W. Bastiaan Kleijn:
Microphone Array Wiener Post Filtering Using Monotone Operator Splitting. IEEE ACM Trans. Audio Speech Lang. Process. 28: 2036-2046 (2020) - 2018
- [j11]Yuma Koizumi, Kenta Niwa, Yusuke Hioka, Kazunori Kobayashi, Yoichi Haneda:
DNN-Based Source Enhancement to Increase Objective Sound Quality Assessment Score. IEEE ACM Trans. Audio Speech Lang. Process. 26(10): 1780-1792 (2018) - [j10]Kenta Niwa, Yusuke Hioka, Hisashi Uematsu:
Efficient Audio Rendering Using Angular Region-Wise Source Enhancement for 360° Video. IEEE Trans. Multim. 20(11): 2871-2881 (2018) - 2017
- [j9]Tomoko Kawase, Kenta Niwa, Masakiyo Fujimoto, Kazunori Kobayashi, Shoko Araki, Tomohiro Nakatani:
Integration of Spatial Cue-Based Noise Reduction and Speech Model-Based Source Restoration for Real Time Speech Enhancement. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 100-A(5): 1127-1136 (2017) - [j8]Kento Ohtani, Kenta Niwa, Kazuya Takeda:
A Single-Dimensional Interface for Arranging Multiple Audio Sources in Three-Dimensional Space. IEICE Trans. Inf. Syst. 100-D(10): 2635-2643 (2017) - [j7]Yuma Koizumi, Kenta Niwa, Yusuke Hioka, Kazunori Kobayashi, Hitoshi Ohmuro:
Informative Acoustic Feature Selection to Maximize Mutual Information for Collecting Target Sources. IEEE ACM Trans. Audio Speech Lang. Process. 25(4): 768-779 (2017) - 2016
- [j6]Kenta Niwa, Yusuke Hioka, Kazunori Kobayashi:
Optimal Microphone Array Observation for Clear Recording of Distant Sound Sources. IEEE ACM Trans. Audio Speech Lang. Process. 24(10): 1785-1795 (2016) - 2013
- [j5]Kenta Niwa, Yusuke Hioka, Sumitaka Sakauchi, Ken'ichi Furuya, Yoichi Haneda:
An Estimation Method of Sound Source Orientation Using Eigenspace Variation of Spatial Correlation Matrix. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 96-A(9): 1831-1839 (2013) - [j4]Yusuke Hioka, Ken'ichi Furuya, Kazunori Kobayashi, Kenta Niwa, Yoichi Haneda:
Underdetermined Sound Source Separation Using Power Spectrum Density Estimated by Combination of Directivity Gain. IEEE Trans. Speech Audio Process. 21(6): 1240-1250 (2013) - [j3]Kenta Niwa, Yusuke Hioka, Ken'ichi Furuya, Yoichi Haneda:
Diffused Sensing for Sharp Directive Beamforming. IEEE Trans. Speech Audio Process. 21(11): 2346-2355 (2013) - 2011
- [j2]Yusuke Hioka, Kenta Niwa, Sumitaka Sakauchi, Ken'ichi Furuya, Youichi Haneda:
Estimating Direct-to-Reverberant Energy Ratio Using D/R Spatial Correlation Matrix Model. IEEE ACM Trans. Audio Speech Lang. Process. 19(8): 2374-2384 (2011) - 2009
- [j1]Kenta Niwa, Takanori Nishino, Kazuya Takeda:
Selective Listening Point Audio Based on Blind Signal Separation and Stereophonic Technology. IEICE Trans. Inf. Syst. 92-D(3): 469-476 (2009)
Conference and Workshop Papers
- 2024
- [c46]Shoichiro Takeda, Yasunori Akagi, Naoki Marumo, Kenta Niwa:
Optimal Transport with Cyclic Symmetry. AAAI 2024: 15211-15221 - [c45]Guoqiang Zhang, Kenta Niwa, W. Bastiaan Kleijn:
On Accelerating Diffusion-Based Sampling Processes via Improved Integration Approximation. ICLR 2024 - [c44]Tomoya Murata, Kenta Niwa, Takumi Fukami, Iifan Tyou:
Simple Minimax Optimal Byzantine Robust Algorithm for Nonconvex Objectives with Uniform Gradient Heterogeneity. ICLR 2024 - 2023
- [c43]Guoqiang Zhang, Kenta Niwa, W. Bastiaan Kleijn:
Lookahead Diffusion Probabilistic Models for Refining Mean Estimation. CVPR 2023: 1421-1429 - [c42]Yuki Takezawa, Ryoma Sato, Han Bao, Kenta Niwa, Makoto Yamada:
Beyond Exponential Graph: Communication-Efficient Topologies for Decentralized Learning via Finite-time Convergence. NeurIPS 2023 - 2022
- [c41]Shoichiro Takeda, Kenta Niwa, Mariko Isogawa, Shinya Shimizu, Kazuki Okami, Yushi Aono:
Bilateral Video Magnification Filter. CVPR 2022: 17348-17357 - 2021
- [c40]Kenta Imaizumi, Kenta Niwa, Kimitaka Tsutsumi:
Loudspeaker Array to Maximize Acoustic Contrast Using Proximal Splitting Method. EUSIPCO 2021: 91-95 - [c39]Kenta Niwa, Guoqiang Zhang, W. Bastiaan Kleijn, Noboru Harada, Hiroshi Sawada, Akinori Fujino:
Asynchronous Decentralized Optimization With Implicit Stochastic Variance Reduction. ICML 2021: 8195-8204 - 2020
- [c38]Shoichiro Takeda, Kenta Niwa, Shinya Shimizu:
Differentiable Max-Directivity Beamforming Normalization for Independent Vector Analysis. EUSIPCO 2020: 296-300 - [c37]Guoqiang Zhang, Kenta Niwa, W. Bastiaan Kleijn:
Projected Weight Regularization to Improve Neural Network Generalization. ICASSP 2020: 4242-4246 - [c36]Kenta Niwa, Noboru Harada, Guoqiang Zhang, W. Bastiaan Kleijn:
Edge-consensus Learning: Deep Learning on P2P Networks with Nonhomogeneous Data. KDD 2020: 668-678 - 2019
- [c35]Ryotaro Sato, Kenta Niwa, Noboru Harada:
Function Designable Beamformer Based on Probabilistic Assumptions on Filter and Its Auxiliary Variables. ICASSP 2019: 780-784 - [c34]Kenta Niwa, Guoqiang Zhang, W. Bastiaan Kleijn:
Fast Edge-consensus Computing Based on Bregman Monotone Operator Splitting. ICASSP 2019: 4609-4613 - [c33]Kenta Niwa, Noboru Harada:
Non-negative Matrix Factorization Using Bregman Monotone Operator Splitting. ICASSP 2019: 5531-5535 - [c32]Yusuke Hioka, Kei Kobayashi, Kenta Niwa:
Improving speech intelligibility using microphones on behind the ear hearing aids. MMSP 2019: 1-4 - 2018
- [c31]Kenta Niwa, Guoqiang Zhang, W. Bastiaan Kleijn:
Edge Consensus Computing for Heterogeneous Data Sets. SSP 2018: 80-84 - 2017
- [c30]Yuma Koizumi, Kenta Niwa, Yusuke Hioka, Kazunori Kobayashi, Yoichi Haneda:
DNN-based source enhancement self-optimized by reinforcement learning using sound quality measurements. ICASSP 2017: 81-85 - [c29]Kenta Niwa, Yuma Koizumi, Tomoko Kawase, Kazunori Kobayashi, Yusuke Hioka:
Supervised source enhancement composed of nonnegative auto-encoders and complementarity subtraction. ICASSP 2017: 266-270 - [c28]Kenta Niwa, Kento Ohtani, Kazuya Takeda:
Music staging AI. ICASSP 2017: 6588-6589 - [c27]Manabu Tsukada, Keiko Ogawa, Masahiro Ikeda, Takuro Sone, Kenta Niwa, Shoichiro Saito, Takashi Kasuya, Hideki Sunahara, Hiroshi Esaki:
Software defined media: Virtualization of audio-visual services. ICC 2017: 1-7 - 2016
- [c26]Yusuke Hioka, Kenta Niwa:
Estimating direct-to-reverberant ratio mapped from power spectral density using deep neural network. ICASSP 2016: 26-30 - [c25]Yuma Koizumi, Kenta Niwa, Yusuke Hioka, Kazunori Kobayashi, Hitoshi Ohmuro:
Integrated approach of feature extraction and sound source enhancement based on maximization of mutual information. ICASSP 2016: 186-190 - [c24]Kenta Niwa, Yuma Koizumi, Tomoko Kawase, Kazunori Kobayashi, Yusuke Hioka:
Pinpoint extraction of distant sound source based on DNN mapping from multiple beamforming outputs to prior SNR. ICASSP 2016: 435-439 - [c23]Tomoko Kawase, Kenta Niwa, Masakiyo Fujimoto, Noriyoshi Kamado, Kazunori Kobayashi, Shoko Araki, Tomohiro Nakatani:
Real-time integration of statistical model-based speech enhancement with unsupervised noise PSD estimation using microphone array. ICASSP 2016: 604-608 - [c22]Kenta Niwa, Yuma Koizumi, Kazunori Kobayashi, Hisashi Uematsu:
Binaural sound generation corresponding to omnidirectional video view using angular region-wise source enhancement. ICASSP 2016: 2852-2856 - [c21]Tomoko Kawase, Kenta Niwa, Kazunori Kobayashi, Yusuke Hioka:
Application of neural network to source PSD estimation for wiener filter based array sound source enhancement. IWAENC 2016: 1-5 - [c20]Kenta Niwa, Tomoko Kawase, Kazunori Kobayashi, Yusuke Hioka:
PSD estimation in beamspace using property of M-matrix. IWAENC 2016: 1-5 - 2015
- [c19]Kenta Niwa, Tatsuya Kako, Kazunori Kobayashi:
Microphone array for increasing mutual information between sound sources and observation signals. ICASSP 2015: 534-538 - [c18]Daisuke Ochi, Kenta Niwa, Akio Kameda, Yutaka Kunita, Akira Kojima:
Dive into Remote Events: Omnidirectional Video Streaming with Acoustic Immersion. ACM Multimedia 2015: 737-738 - [c17]Kenta Niwa, Takayoshi Yamada, Hidehiko Yamamoto, Haruhisa Kawasaki, Tetsuya Mouri:
Optimization of grasp positions using the partial differentiation of the grasp stiffness matrix. SII 2015: 924-929 - [c16]Tatsuya Kako, Kenta Niwa, Kazunori Kobayashi, Hitoshi Ohmuro:
Wiener filter design by estimating sensitivities between distributed asynchronous microphones and sound sources. WASPAA 2015: 1-5 - [c15]Yuma Koizumi, Kenta Niwa, Yusuke Hioka, Kazunori Kobayashi, Hitoshi Ohmuro:
Informative acoustic feature selection on microphone array wiener filtering for collecting target source on sports ground. WASPAA 2015: 1-5 - 2014
- [c14]Yoichi Haneda, Ken'ichi Furuya, Shoichi Koyama, Kenta Niwa:
Close-talking spherical microphone array using sound pressure interpolation based on spherical harmonic expansion. ICASSP 2014: 604-608 - [c13]Kenta Niwa, Yusuke Hioka, Kazunori Kobayashi:
Post-filter design for speech enhancement in various noisy environments. IWAENC 2014: 35-39 - [c12]Yusuke Hioka, Kenta Niwa:
PSD estimation in beamspace for source separation in a diffuse noise field. IWAENC 2014: 85-88 - 2013
- [c11]Kenta Niwa, Yusuke Hioka, Kazunori Kobayashi, Ken'ichi Furuya, Yoichi Haneda:
Evaluation of microphone array based on diffused sensing with various filter design methods. EUSIPCO 2013: 1-5 - [c10]Kenta Niwa, Yusuke Hioka, Kazunori Kobayashi:
Wave intensity estimation over broad wavelengths based on diffused sensing. ICST 2013: 256-261 - 2012
- [c9]Kenta Niwa, Sumitaka Sakauchi, Ken'ichi Furuya, Manabu Okamoto, Yoichi Haneda:
Diffused sensing for sharp directivity microphone array. ICASSP 2012: 225-228 - [c8]Satoshi Esaki, Kenta Niwa, Takanori Nishino, Kazuya Takeda:
Estimating sound source depth using a small-size array. ICASSP 2012: 401-404 - [c7]Kenta Niwa, Yusuke Hioka, Sumitaka Sakauchi, Ken'ichi Furuya, Yoichi Haneda:
Telescopic microphone array using reflector for segregating target source from noises in same direction. ICASSP 2012: 5457-5460 - [c6]Kenta Niwa, Sumitaka Sakauchi, Ken'ichi Furuya, Manabu Okamoto, Yoichi Haneda:
Superdirective beamforming using microphone array and single reflector. ICCE 2012: 17-18 - [c5]Yusuke Hioka, Ken'ichi Furuya, Kenta Niwa, Yoichi Haneda:
Estimation of Direct-to-Reverberation Energy Ratio Based On Isotropic and Homogeneous Propagation Model. IWAENC 2012 - 2010
- [c4]Kenta Niwa, Yusuke Hioka, Sumitaka Sakauchi, Ken'ichi Furuya, Youichi Haneda:
Estimation of sound source orientation using eigenspace of spatial correlation matrix. ICASSP 2010: 129-132 - [c3]Yusuke Hioka, Kenta Niwa, Sumitaka Sakauchi, Ken'ichi Furuya, Youichi Haneda:
Estimating direct-to-reverberant energy ratio based on spatial correlation model segregating direct sound and reverberation. ICASSP 2010: 149-152 - 2008
- [c2]Kenta Niwa, Takanori Nishino, Kazuya Takeda:
Encoding large array signals into a 3D sound field representation for selective listening point audio based on blind source separation. ICASSP 2008: 181-184 - [c1]Mehrdad Panahpour Tehrani, Kenta Niwa, Norishige Fukushima, Yasushi Hirano, Toshiaki Fujii, Masayuki Tanimoto, Kazuya Takeda, Kenji Mase, Akio Ishikawa, Shigeyuki Sakazawa, Atsushi Koike:
3DAV integrated system featuring arbitrary listening-point and viewpoint generation. MMSP 2008: 855-860
Informal and Other Publications
- 2024
- [i18]Yuki Takezawa, Han Bao, Ryoma Sato, Kenta Niwa, Makoto Yamada:
Polyak Meets Parameter-free Clipped Gradient Descent. CoRR abs/2405.15010 (2024) - 2023
- [i17]Guoqiang Zhang, Kenta Niwa, W. Bastiaan Kleijn:
Lookahead Diffusion Probabilistic Models for Refining Mean Estimation. CoRR abs/2304.11312 (2023) - [i16]Guoqiang Zhang, Kenta Niwa, W. Bastiaan Kleijn:
On Accelerating Diffusion-Based Sampling Process via Improved Integration Approximation. CoRR abs/2304.11328 (2023) - [i15]Yuki Takezawa, Ryoma Sato, Han Bao, Kenta Niwa, Makoto Yamada:
Beyond Exponential Graph: Communication-Efficient Topologies for Decentralized Learning via Finite-time Convergence. CoRR abs/2305.11420 (2023) - [i14]Yuki Takezawa, Ryoma Sato, Han Bao, Kenta Niwa, Makoto Yamada:
Necessary and Sufficient Watermark for Large Language Models. CoRR abs/2310.00833 (2023) - [i13]Ryoma Sato, Yuki Takezawa, Han Bao, Kenta Niwa, Makoto Yamada:
Embarrassingly Simple Text Watermarks. CoRR abs/2310.08920 (2023) - [i12]Shoichiro Takeda, Yasunori Akagi, Naoki Marumo, Kenta Niwa:
Optimal Transport with Cyclic Symmetry. CoRR abs/2311.13147 (2023) - 2022
- [i11]Guoqiang Zhang, Kenta Niwa, W. Bastiaan Kleijn:
On Exploiting Layerwise Gradient Statistics for Effective Training of Deep Neural Networks. CoRR abs/2203.13273 (2022) - [i10]Yuki Takezawa, Kenta Niwa, Makoto Yamada:
Communication Compression for Decentralized Learning with Operator Splitting Methods. CoRR abs/2205.03779 (2022) - [i9]Yuki Takezawa, Kenta Niwa, Makoto Yamada:
Theoretical Analysis of Primal-Dual Algorithm for Non-Convex Stochastic Decentralized Optimization. CoRR abs/2205.11979 (2022) - [i8]Yuki Takezawa, Han Bao, Kenta Niwa, Ryoma Sato, Makoto Yamada:
Momentum Tracking: Momentum Acceleration for Decentralized Deep Learning on Heterogeneous Data. CoRR abs/2209.15505 (2022) - 2021
- [i7]Guoqiang Zhang, Kenta Niwa, W. Bastiaan Kleijn:
Revisiting the Primal-Dual Method of Multipliers for Optimisation over Centralised Networks. CoRR abs/2107.08809 (2021) - [i6]Guoqiang Zhang, Kenta Niwa, W. Bastiaan Kleijn:
Extending AdamW by Leveraging Its Second Moment and Magnitude. CoRR abs/2112.06125 (2021) - 2019
- [i5]Guoqiang Zhang, Kenta Niwa, W. Bastiaan Kleijn:
Rapidly Adapting Moment Estimation. CoRR abs/1902.09030 (2019) - [i4]Guoqiang Zhang, Kenta Niwa, W. Bastiaan Kleijn:
Approximated Orthonormal Normalisation in Training Neural Networks. CoRR abs/1911.09445 (2019) - 2018
- [i3]Yuma Koizumi, Kenta Niwa, Yusuke Hioka, Kazunori Kobayashi, Yoichi Haneda:
DNN-based Source Enhancement to Increase Objective Sound Quality Assessment Score. CoRR abs/1810.09137 (2018) - 2017
- [i2]Manabu Tsukada, Keiko Ogawa, Masahiro Ikeda, Takuro Sone, Kenta Niwa, Shoichiro Saito, Takashi Kasuya, Hideki Sunahara, Hiroshi Esaki:
Software Defined Media: Virtualization of Audio-Visual Services. CoRR abs/1702.07452 (2017) - 2015
- [i1]Yusuke Hioka, Kenta Niwa:
PSD estimation in Beamspace for Estimating Direct-to-Reverberant Ratio from A Reverberant Speech Signal. CoRR abs/1510.08963 (2015)
Coauthor Index
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