A 128 kb/s Hi-Fi Audio CODEC Based on Adaptive Transform Coding with Adaptive Block Size MDCT. - Masahiro Iwadare; Akihiko Sugiyama; Fumie Hazu; Akihiro Hirano; Takao Nishitani (IEEE J. Sel. Areas Commun., 1992)

DSP implementation and performance evaluation of a compact stereo echo canceller. - Akihiro Hirano; Akihiko Sugiyama; Yasuhiro Arasawa; Noboru Kawayachi (ICASSP (2), 1994)

A noise-robust stochastic gradient algorithm with an adaptive step-size suitable for mobile hands-free telephones. - Akihiro Hirano; Akihiko Sugiyama (ICASSP, 1995)

DSP implementation and performance evaluation of sparse-tap adaptive FIR filters with tap-position control. - Akihiro Hirano; Akihiko Sugiyama; Shigeji Ikeda (ICASSP, 1996)

Recovering 3D shape and texture from continuous focus series: using a polarized filter. - Tomoyuki Kudou; Akihiro Hirano; Hidetoshi Miike (ICIP (1), 1996)

A robust adaptive microphone array with improved spatial selectivity and its evaluation in a real environment. - Osamu Hoshuyama; Akihiko Sugiyama; Akihiro Hirano (ICASSP, 1997)

DSP implementation and performance evaluation of a stereo echo canceler with pre-processing. - Yann Joncour; Akihiko Sugiyama; Akihiro Hirano (EUSIPCO, 1998)

A real time robust adaptive microphone array controlled by an SNR estimate. - Osamu Hoshuyama; Brigitte Begasse; Akihiko Sugiyama; Akihiro Hirano (ICASSP, 1998)

Convergence analysis of stereophonic echo canceller with pre-processing-relation between pre-processing and convergence. - Akihiro Hirano; Kenji Nakayama; Kazunobu Watanabe (ICASSP, 1999)

A polyphase and FFT realization of modulation sub-band adaptive filter with minimum sampling rate. - Kenji Nakayama; Akihiro Hirano; Hiroaki Sakaguchi (ICASSP, 1999)

A multilayer neural network with nonlinear inputs and trainable activation functions: structure and simultaneous learning algorithm. - Kenji Nakayama; Akihiro Hirano; Issei Ido (IJCNN, 1999)

A robust adaptive beamformer for microphone arrays with a blocking matrix using constrained adaptive filters. - Osamu Hoshuyama; Akihiko Sugiyama; Akihiro Hirano (IEEE Trans. Signal Process., 1999)

A Structure Trainable Neural Network with Embedded Gating Units and Its Learning Algorithm. - Kenji Nakayama; Akihiro Hirano; Aki Kanbe (IJCNN (3), 2000)

A Constraint Learning Algorithm for Blind Source Separation. - Kenji Nakayama; Akihiro Hirano; Motoki Nitta (IJCNN (3), 2000)

A synchronized learning algorithm for reflection coefficients and tap weights in a joint lattice predictor and transversal filter. - Naoki Tokui; Kenji Nakayama; Akihiro Hirano (ICASSP, 2001)

A stereo echo canceler with correct echo-path identification based on an input-sliding technique. - Akihiko Sugiyama; Yann Joncour; Akihiro Hirano (IEEE Trans. Signal Process., 2001)

A fast convergence algorithm for sparse-tap adaptive FIR filters identifying an unknown number of dispersive regions. - Akihiko Sugiyama; Shigeji Ikeda; Akihiro Hirano (IEEE Trans. Signal Process., 2002)

Block implementation of a synchronized learning algorithm in adaptive lattice filters. - Naoki Tokui; Kenji Nakayama; Akihiro Hirano (ICASSP (6), 2003)

A learning algorithm with adaptive exponential stepsize for blind source separation of convolutive mixtures with reverberations. - Kenji Nakayama; Akihiro Hirano; Akihide Horita (IJCNN, 2003)

A cascade form blind source separation connecting source separation and linearization for nonlinear mixtures. - Kenji Nakayama; Akihiro Hirano; Takayuki Nishiwaki (IJCNN, 2003)

A lattice predictor based adaptive Volterra filter and a synchronized learning algorithm. - Kenji Nakayama; Akihiro Hirano; Hiroaki Kashimoto (EUSIPCO, 2004)

Acoustic echo cancellation for conference systems. - Akihiko Sugiyama; Akihiro Hirano; Kenji Nakayama (EUSIPCO, 2004)

Stereophonic acoustic echo canceller without pre-processing. - Akihiro Hirano; Kenji Nakayama; Daisuke Someda; Masahiko Tanaka (ICASSP (4), 2004)

A blind source separation cascading separation and linearization for low-order nonlinear mixtures. - Takayuki Nishiwaki; Kenji Nakayama; Akihiro Hirano (ICASSP (5), 2004)

On generalization of multilayer neural network applied to predicting protein secondary structure. - Kenji Nakayama; Akihiro Hirano; Ken-ichi Fukumura (IJCNN, 2004)

A synchronized learning algorithm for nonlinear part in a lattice predictor based adaptive Volterra filter. - Kenji Nakayama; Akihiro Hirano; Hiroaki Kashimoto (EUSIPCO, 2005)

Analysis of signal separation and signal distortion in feedforward and feedback blind source separation based on source spectra. - Akihide Horita; Kenji Nakayama; Akihiro Hirano; Yasuhiro Dejima (IJCNN, 2005)

A learning algorithm with distortion free constraint and comparative study for feedforward and feedback BSS. - Akihide Horita; Kenji Nakayama; Akihiro Hirano; Yasuhiro Dejima (EUSIPCO, 2006)

A Distortion Free Learning Algorithm for Feedforward BSS and ITS Comparative Study with Feedback BSS. - Akihide Horita; Kenji Nakayama; Akihiro Hirano; Yasuhiro Dejima (IJCNN, 2006)

A Stereo Echo Canceler with Input Slides and Counter-Lateralization. - Akihiko Sugiyama; Yann Joncour; Akihiro Hirano; Takao Nishitani; Gérard Faucon (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2006)

A distortion free learning algorithm for multi-channel convolutive blind source separation. - Akihide Horita; Kenji Nakayama; Akihiro Hirano (EUSIPCO, 2007)

A feedback approach to over complete BSS and its learning algorithm. - Kenji Nakayama; Haruo Katou; Akihiro Hirano (EUSIPCO, 2007)

Analysis and Comparative Study of Source Separation Performances in Feed-Forward and Feed-Back BSSs Based on Propagation Delays in Convolutive Mixture. - Akihide Horita; Kenji Nakayama; Akihiro Hirano (ICANN (1), 2007)

A Distortion-Free Learning Algorithm for Feedforward Multi-Channel Blind Source Separation. - Akihide Horita; Kenji Nakayama; Akihiro Hirano (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2007)

Effects of propagation delays and sampling rate on feed-back BSS and comparative studies with feed-forward BSS. - Kenji Nakayama; Akihide Horita; Akihiro Hirano (EUSIPCO, 2008)

Neural Network Based BCI by Using Orthogonal Components of Multi-channel Brain Waves and Generalization. - Kenji Nakayama; Hiroki Horita; Akihiro Hirano (ICANN (2), 2008)

A noise estimation method based on improved VAD used in noise spectral suppression under highly non-stationary noise environments. - Kenji Nakayama; Shoya Higashi; Akihiro Hirano (EUSIPCO, 2009)

A stereo echo canceller with simultaneous 2-channel input slides for fast convergence and good sound localization. - Akihiko Sugiyama; Yuusuke Mizuno; Laurent Kazdaghli; Akihiro Hirano; Kenji Nakayama (EUSIPCO, 2009)

A BCI System Based on Orthogonalized EEG Data and Multiple Multilayer Neural Networks in Parallel Form. - Kenji Nakayama; Hiroki Horita; Akihiro Hirano (ICANN (1), 2010)

A stereo echo canceller with simultaneous input-sliding and sliding-period control. - Akihiko Sugiyama; Yuusuke Mizuno; Akihiro Hirano; Kenji Nakayama (ICASSP, 2010)

An adaptive control method for regression coefficient in frequency domain non-linear echo suppressor. - Kenji Nakayama; Yuki Ofuji; Akihiro Hirano (EUSIPCO, 2012)

High-Performance Super-Resolution via Patch-Based Deep Neural Network for Real-Time Implementation. - Reo Aoki; Kousuke Imamura; Akihiro Hirano; Yoshio Matsuda (IEICE Trans. Inf. Syst., 2018)