Encoding large array signals into a 3D sound field representation for selective listening point audio based on blind source separation. - Kenta Niwa; Takanori Nishino; Kazuya Takeda (ICASSP, 2008)

3DAV integrated system featuring arbitrary listening-point and viewpoint generation. - Mehrdad Panahpour Tehrani; Kenta Niwa; Norishige Fukushima; Yasushi Hirano; Toshiaki Fujii; Masayuki Tanimoto; Kazuya Takeda; Kenji Mase; Akio Ishikawa; Shigeyuki Sakazawa; Atsushi Koike (MMSP, 2008)

Selective Listening Point Audio Based on Blind Signal Separation and Stereophonic Technology. - Kenta Niwa; Takanori Nishino; Kazuya Takeda (IEICE Trans. Inf. Syst., 2009)

Estimating direct-to-reverberant energy ratio based on spatial correlation model segregating direct sound and reverberation. - Yusuke Hioka; Kenta Niwa; Sumitaka Sakauchi; Ken'ichi Furuya; Youichi Haneda (ICASSP, 2010)

Estimation of sound source orientation using eigenspace of spatial correlation matrix. - Kenta Niwa; Yusuke Hioka; Sumitaka Sakauchi; Ken'ichi Furuya; Youichi Haneda (ICASSP, 2010)

Estimating Direct-to-Reverberant Energy Ratio Using D/R Spatial Correlation Matrix Model. - Yusuke Hioka; Kenta Niwa; Sumitaka Sakauchi; Ken'ichi Furuya; Youichi Haneda (IEEE ACM Trans. Audio Speech Lang. Process., 2011)

Estimating sound source depth using a small-size array. - Satoshi Esaki; Kenta Niwa; Takanori Nishino; Kazuya Takeda (ICASSP, 2012)

Telescopic microphone array using reflector for segregating target source from noises in same direction. - Kenta Niwa; Yusuke Hioka; Sumitaka Sakauchi; Ken'ichi Furuya; Yoichi Haneda (ICASSP, 2012)

Diffused sensing for sharp directivity microphone array. - Kenta Niwa; Sumitaka Sakauchi; Ken'ichi Furuya; Manabu Okamoto; Yoichi Haneda (ICASSP, 2012)

Superdirective beamforming using microphone array and single reflector. - Kenta Niwa; Sumitaka Sakauchi; Ken'ichi Furuya; Manabu Okamoto; Yoichi Haneda (ICCE, 2012)

Estimation of Direct-to-Reverberation Energy Ratio Based On Isotropic and Homogeneous Propagation Model. - Yusuke Hioka; Ken'ichi Furuya; Kenta Niwa; Yoichi Haneda (IWAENC, 2012)

Evaluation of microphone array based on diffused sensing with various filter design methods. - Kenta Niwa; Yusuke Hioka; Kazunori Kobayashi; Ken'ichi Furuya; Yoichi Haneda (EUSIPCO, 2013)

Wave intensity estimation over broad wavelengths based on diffused sensing. - Kenta Niwa; Yusuke Hioka; Kazunori Kobayashi (ICST, 2013)

An Estimation Method of Sound Source Orientation Using Eigenspace Variation of Spatial Correlation Matrix. - Kenta Niwa; Yusuke Hioka; Sumitaka Sakauchi; Ken'ichi Furuya; Yoichi Haneda (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2013)

Underdetermined Sound Source Separation Using Power Spectrum Density Estimated by Combination of Directivity Gain. - Yusuke Hioka; Ken'ichi Furuya; Kazunori Kobayashi; Kenta Niwa; Yoichi Haneda (IEEE Trans. Speech Audio Process., 2013)

Diffused Sensing for Sharp Directive Beamforming. - Kenta Niwa; Yusuke Hioka; Ken'ichi Furuya; Yoichi Haneda (IEEE Trans. Speech Audio Process., 2013)

Close-talking spherical microphone array using sound pressure interpolation based on spherical harmonic expansion. - Yoichi Haneda; Ken'ichi Furuya; Shoichi Koyama; Kenta Niwa (ICASSP, 2014)

PSD estimation in beamspace for source separation in a diffuse noise field. - Yusuke Hioka; Kenta Niwa (IWAENC, 2014)

Post-filter design for speech enhancement in various noisy environments. - Kenta Niwa; Yusuke Hioka; Kazunori Kobayashi (IWAENC, 2014)

Microphone array for increasing mutual information between sound sources and observation signals. - Kenta Niwa; Tatsuya Kako; Kazunori Kobayashi (ICASSP, 2015)

Dive into Remote Events: Omnidirectional Video Streaming with Acoustic Immersion. - Daisuke Ochi; Kenta Niwa; Akio Kameda; Yutaka Kunita; Akira Kojima (ACM Multimedia, 2015)

Optimization of grasp positions using the partial differentiation of the grasp stiffness matrix. - Kenta Niwa; Takayoshi Yamada; Hidehiko Yamamoto; Haruhisa Kawasaki; Tetsuya Mouri (SII, 2015)

Wiener filter design by estimating sensitivities between distributed asynchronous microphones and sound sources. - Tatsuya Kako; Kenta Niwa; Kazunori Kobayashi; Hitoshi Ohmuro (WASPAA, 2015)

Informative acoustic feature selection on microphone array wiener filtering for collecting target source on sports ground. - Yuma Koizumi; Kenta Niwa; Yusuke Hioka; Kazunori Kobayashi; Hitoshi Ohmuro (WASPAA, 2015)

PSD estimation in Beamspace for Estimating Direct-to-Reverberant Ratio from A Reverberant Speech Signal. - Yusuke Hioka; Kenta Niwa (CoRR, 2015)

Estimating direct-to-reverberant ratio mapped from power spectral density using deep neural network. - Yusuke Hioka; Kenta Niwa (ICASSP, 2016)

Real-time integration of statistical model-based speech enhancement with unsupervised noise PSD estimation using microphone array. - Tomoko Kawase; Kenta Niwa; Masakiyo Fujimoto; Noriyoshi Kamado; Kazunori Kobayashi; Shoko Araki; Tomohiro Nakatani (ICASSP, 2016)

Integrated approach of feature extraction and sound source enhancement based on maximization of mutual information. - Yuma Koizumi; Kenta Niwa; Yusuke Hioka; Kazunori Kobayashi; Hitoshi Ohmuro (ICASSP, 2016)

Pinpoint extraction of distant sound source based on DNN mapping from multiple beamforming outputs to prior SNR. - Kenta Niwa; Yuma Koizumi; Tomoko Kawase; Kazunori Kobayashi; Yusuke Hioka (ICASSP, 2016)

Binaural sound generation corresponding to omnidirectional video view using angular region-wise source enhancement. - Kenta Niwa; Yuma Koizumi; Kazunori Kobayashi; Hisashi Uematsu (ICASSP, 2016)

Application of neural network to source PSD estimation for wiener filter based array sound source enhancement. - Tomoko Kawase; Kenta Niwa; Kazunori Kobayashi; Yusuke Hioka (IWAENC, 2016)

PSD estimation in beamspace using property of M-matrix. - Kenta Niwa; Tomoko Kawase; Kazunori Kobayashi; Yusuke Hioka (IWAENC, 2016)

Optimal Microphone Array Observation for Clear Recording of Distant Sound Sources. - Kenta Niwa; Yusuke Hioka; Kazunori Kobayashi (IEEE ACM Trans. Audio Speech Lang. Process., 2016)

DNN-based source enhancement self-optimized by reinforcement learning using sound quality measurements. - Yuma Koizumi; Kenta Niwa; Yusuke Hioka; Kazunori Kobayashi; Yoichi Haneda (ICASSP, 2017)

Supervised source enhancement composed of nonnegative auto-encoders and complementarity subtraction. - Kenta Niwa; Yuma Koizumi; Tomoko Kawase; Kazunori Kobayashi; Yusuke Hioka (ICASSP, 2017)

Music staging AI. - Kenta Niwa; Kento Ohtani; Kazuya Takeda (ICASSP, 2017)

Software defined media: Virtualization of audio-visual services. - Manabu Tsukada; Keiko Ogawa; Masahiro Ikeda; Takuro Sone; Kenta Niwa; Shoichiro Saito; Takashi Kasuya; Hideki Sunahara; Hiroshi Esaki (ICC, 2017)

Integration of Spatial Cue-Based Noise Reduction and Speech Model-Based Source Restoration for Real Time Speech Enhancement. - Tomoko Kawase; Kenta Niwa; Masakiyo Fujimoto; Kazunori Kobayashi; Shoko Araki; Tomohiro Nakatani (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2017)

A Single-Dimensional Interface for Arranging Multiple Audio Sources in Three-Dimensional Space. - Kento Ohtani; Kenta Niwa; Kazuya Takeda (IEICE Trans. Inf. Syst., 2017)

Informative Acoustic Feature Selection to Maximize Mutual Information for Collecting Target Sources. - Yuma Koizumi; Kenta Niwa; Yusuke Hioka; Kazunori Kobayashi; Hitoshi Ohmuro (IEEE ACM Trans. Audio Speech Lang. Process., 2017)

Edge Consensus Computing for Heterogeneous Data Sets. - Kenta Niwa; Guoqiang Zhang 003; W. Bastiaan Kleijn (SSP, 2018)

DNN-Based Source Enhancement to Increase Objective Sound Quality Assessment Score. - Yuma Koizumi; Kenta Niwa; Yusuke Hioka; Kazunori Kobayashi; Yoichi Haneda (IEEE ACM Trans. Audio Speech Lang. Process., 2018)

Efficient Audio Rendering Using Angular Region-Wise Source Enhancement for 360° Video. - Kenta Niwa; Yusuke Hioka; Hisashi Uematsu (IEEE Trans. Multim., 2018)

Fast Edge-consensus Computing Based on Bregman Monotone Operator Splitting. - Kenta Niwa; Guoqiang Zhang 003; W. Bastiaan Kleijn (ICASSP, 2019)

Non-negative Matrix Factorization Using Bregman Monotone Operator Splitting. - Kenta Niwa; Noboru Harada (ICASSP, 2019)

Function Designable Beamformer Based on Probabilistic Assumptions on Filter and Its Auxiliary Variables. - Ryotaro Sato; Kenta Niwa; Noboru Harada (ICASSP, 2019)

Improving speech intelligibility using microphones on behind the ear hearing aids. - Yusuke Hioka; Kei Kobayashi; Kenta Niwa (MMSP, 2019)

Rapidly Adapting Moment Estimation. - Guoqiang Zhang 003; Kenta Niwa; W. Bastiaan Kleijn (CoRR, 2019)

Approximated Orthonormal Normalisation in Training Neural Networks. - Guoqiang Zhang 003; Kenta Niwa; W. Bastiaan Kleijn (CoRR, 2019)

Differentiable Max-Directivity Beamforming Normalization for Independent Vector Analysis. - Shoichiro Takeda; Kenta Niwa; Shinya Shimizu (EUSIPCO, 2020)

Projected Weight Regularization to Improve Neural Network Generalization. - Guoqiang Zhang 003; Kenta Niwa; W. Bastiaan Kleijn (ICASSP, 2020)

Edge-consensus Learning: Deep Learning on P2P Networks with Nonhomogeneous Data. - Kenta Niwa; Noboru Harada; Guoqiang Zhang 003; W. Bastiaan Kleijn (KDD, 2020)

Microphone Array Wiener Post Filtering Using Monotone Operator Splitting. - Kenta Niwa; Hironobu Chiba; Noboru Harada; Guoqiang Zhang 003; W. Bastiaan Kleijn (IEEE ACM Trans. Audio Speech Lang. Process., 2020)

Loudspeaker Array to Maximize Acoustic Contrast Using Proximal Splitting Method. - Kenta Imaizumi; Kenta Niwa; Kimitaka Tsutsumi (EUSIPCO, 2021)

Asynchronous Decentralized Optimization With Implicit Stochastic Variance Reduction. - Kenta Niwa; Guoqiang Zhang 003; W. Bastiaan Kleijn; Noboru Harada; Hiroshi Sawada; Akinori Fujino (ICML, 2021)

Extending AdamW by Leveraging Its Second Moment and Magnitude. - Guoqiang Zhang 003; Kenta Niwa; W. Bastiaan Kleijn (CoRR, 2021)

Ambisonic Signal Processing DNNs Guaranteeing Rotation, Scale and Time Translation Equivariance. - Ryotaro Sato; Kenta Niwa; Kazunori Kobayashi (IEEE ACM Trans. Audio Speech Lang. Process., 2021)

Bilateral Video Magnification Filter. - Shoichiro Takeda; Kenta Niwa; Mariko Isogawa; Shinya Shimizu; Kazuki Okami; Yushi Aono (CVPR, 2022)

On Exploiting Layerwise Gradient Statistics for Effective Training of Deep Neural Networks. - Guoqiang Zhang 003; Kenta Niwa; W. Bastiaan Kleijn (CoRR, 2022)

Theoretical Analysis of Primal-Dual Algorithm for Non-Convex Stochastic Decentralized Optimization. - Yuki Takezawa; Kenta Niwa; Makoto Yamada (CoRR, 2022)

Revisiting the Primal-Dual Method of Multipliers for Optimisation Over Centralised Networks. - Guoqiang Zhang 003; Kenta Niwa; W. Bastiaan Kleijn (IEEE Trans. Signal Inf. Process. over Networks, 2022)

Lookahead Diffusion Probabilistic Models for Refining Mean Estimation. - Guoqiang Zhang 003; Kenta Niwa; W. Bastiaan Kleijn (CVPR, 2023)

Beyond Exponential Graph: Communication-Efficient Topologies for Decentralized Learning via Finite-time Convergence. - Yuki Takezawa; Ryoma Sato; Han Bao 002; Kenta Niwa; Makoto Yamada (NeurIPS, 2023)

On Accelerating Diffusion-Based Sampling Process via Improved Integration Approximation. - Guoqiang Zhang 003; Kenta Niwa; W. Bastiaan Kleijn (CoRR, 2023)

Embarrassingly Simple Text Watermarks. - Ryoma Sato; Yuki Takezawa; Han Bao 002; Kenta Niwa; Makoto Yamada (CoRR, 2023)

A DNN Optimizer that Improves over AdaBelief by Suppression of the Adaptive Stepsize Range. - Guoqiang Zhang 003; Kenta Niwa; W. Bastiaan Kleijn (Trans. Mach. Learn. Res., 2023)

Momentum Tracking: Momentum Acceleration for Decentralized Deep Learning on Heterogeneous Data. - Yuki Takezawa; Han Bao 002; Kenta Niwa; Ryoma Sato; Makoto Yamada (Trans. Mach. Learn. Res., 2023)

CoordiNet: Constrained Dynamics Learning for State Coordination Over Graph. - Kenta Niwa; Naonori Ueda; Hiroshi Sawada; Akinori Fujino; Shoichiro Takeda; Guoqiang Zhang 003; W. Bastiaan Kleijn (IEEE Trans. Signal Inf. Process. over Networks, 2023)

Communication Compression for Decentralized Learning With Operator Splitting Methods. - Yuki Takezawa; Kenta Niwa; Makoto Yamada (IEEE Trans. Signal Inf. Process. over Networks, 2023)

Optimal Transport with Cyclic Symmetry. - Shoichiro Takeda; Yasunori Akagi; Naoki Marumo; Kenta Niwa (AAAI, 2024)

On Accelerating Diffusion-Based Sampling Processes via Improved Integration Approximation. - Guoqiang Zhang 003; Kenta Niwa; W. Bastiaan Kleijn (ICLR, 2024)

Simple Minimax Optimal Byzantine Robust Algorithm for Nonconvex Objectives with Uniform Gradient Heterogeneity. - Tomoya Murata; Kenta Niwa; Takumi Fukami; Iifan Tyou (ICLR, 2024)

Parameter-free Clipped Gradient Descent Meets Polyak. - Yuki Takezawa; Han Bao 002; Ryoma Sato; Kenta Niwa; Makoto Yamada (NeurIPS, 2024)

Polyak Meets Parameter-free Clipped Gradient Descent. - Yuki Takezawa; Han Bao 002; Ryoma Sato; Kenta Niwa; Makoto Yamada (CoRR, 2024)

DP-Norm: Differential Privacy Primal-Dual Algorithm for Decentralized Federated Learning. - Takumi Fukami; Tomoya Murata; Kenta Niwa; Iifan Tyou (IEEE Trans. Inf. Forensics Secur., 2024)

Natural Gradient Primal-Dual Method for Decentralized Learning. - Kenta Niwa; Hiro Ishii; Hiroshi Sawada; Akinori Fujino; Noboru Harada; Rio Yokota (IEEE Trans. Signal Inf. Process. over Networks, 2024)

A Localized Primal-Dual Method for Centralized/Decentralized Federated Learning Robust to Data Heterogeneity. - Iifan Tyou; Tomoya Murata; Takumi Fukami; Yuki Takezawa; Kenta Niwa (IEEE Trans. Signal Inf. Process. over Networks, 2024)

SSFG: Stochastically Scaling Features and Gradients for Regularizing Graph Convolutional Networks. - Haimin Zhang 001; Min Xu 001; Guoqiang Zhang 003; Kenta Niwa (IEEE Trans. Neural Networks Learn. Syst., 2024)

Adaptive Clipping for Differential Private Federated Learning in Interpolation Regimes. - Takumi Fukami; Tomoya Murata; Kenta Niwa (Trans. Mach. Learn. Res., 2025)

Necessary and Sufficient Watermark for Large Language Models. - Yuki Takezawa; Ryoma Sato; Han Bao 002; Kenta Niwa; Makoto Yamada (Trans. Mach. Learn. Res., 2025)

NeurIPS 2023 Competition: Privacy Preserving Federated Learning Document VQA. - Marlon Tobaben; Mohamed Ali Souibgui; Rubèn Tito; Khanh Nguyen; Raouf Kerkouche; Kangsoo Jung; Joonas Jälkö; Lei Kang; Andrey Barsky; Vincent Poulain D'Andecy; Aurélie Joseph; Aashiq Muhamed; et al. (Trans. Mach. Learn. Res., 2025)

High Quality Diffusion Distillation on a Single GPU with Relative and Absolute Position Matching. - Guoqiang Zhang 003; Kenta Niwa; John P. Lewis; Cédric Mesnage; W. Bastiaan Kleijn (CoRR, 2025)