A method of eliminating a bias in the normalized circular lattice algorithm. - Youji Iiguni; Hideaki Sakai; Hidekatsu Tokumaru (IEEE Trans. Acoust. Speech Signal Process., 1985)

Convergence properties of simplified gradient adaptive lattice algorithms. - Youji Iiguni; Hideaki Sakai; Hidekatsu Tokumaru (IEEE Trans. Acoust. Speech Signal Process., 1985)

Rounding error analysis of the triangular lattice and escalator algorithms. - Youji Iiguni; Hideaki Sakai; Hidekatsu Tokumaru (ICASSP, 1986)

An LDU decomposition algorithm for a block Toeplitz matrix having a parallel and pipelined computing structure. - Youji Iiguni; Hideaki Sakai; Hidekatsu Tokumaru (Inf. Sci., 1986)

Block implementation of a recursive least squares estimation algorithm. - Youji Iiguni; Hideaki Sakai; Hidekatsu Tokumaru (IEEE Trans. Acoust. Speech Signal Process., 1988)

A regulator design method using multi-layered neural networks. - Youji Iiguni; Hideaki Sakai; Hidekatsu Tokumaru (IJCNN, 1990)

A nonlinear regulator design in the presence of system uncertainties using multilayered neural network. - Youji Iiguni; Hideaki Sakai; Hidekatsu Tokumaru (IEEE Trans. Neural Networks, 1991)

A real-time learning algorithm for a multilayered neural network based on the extended Kalman filter. - Youji Iiguni; Hideaki Sakai; Hidekatsu Tokumaru (IEEE Trans. Signal Process., 1992)

Hierarchical image coding via cerebellar model arithmetic computers. - Youji Iiguni (IEEE Trans. Image Process., 1996)

A nonlinear adaptive estimation method based on local approximation. - Youji Iiguni; Isao Kawamoto; Norihiko Adachi (IEEE Trans. Signal Process., 1997)

Online Recognition of Handwritten Hiragana Characters Based Upon a Complex Autoregressive Model. - Yuichi Nakatani; Daisuke Sasaki; Youji Iiguni; Hajime Maeda (IEEE Trans. Pattern Anal. Mach. Intell., 1999)

Image interpolation for progressive transmission by using radial basis function networks. - T. Sigitani; Youji Iiguni; Hajime Maeda (IEEE Trans. Neural Networks, 1999)

2-D DOA estimation method using Zernike moments. - Nobuhiro Kanaya; Youji Iiguni; Hajime Maeda (Signal Process., 2002)

Image restoration using the RBF network with variable regularization parameters. - Kaoru Inoue; Youji Iiguni; Hajime Maeda (Neurocomputing, 2003)

DOA estimation based on the database retrieval technique with nonuniform quantization and clustering. - Ivan Setiawan; Youji Iiguni (Digit. Signal Process., 2004)

Nonlinear Image Restoration Using a Radial Basis Function Network. - Keiji Icho; Youji Iiguni; Hajime Maeda (EURASIP J. Adv. Signal Process., 2004)

An Approximate Algorithm for Robust Adaptive Beamforming. - Tomoaki Yoshida; Youji Iiguni (EURASIP J. Adv. Signal Process., 2004)

A fast regularization parameter selection for regularly sampled 2D inputs. - Kaoru Inoue; Youji Iiguni (Int. J. Syst. Sci., 2004)

Radial basis function network with bias compensation for regularly sampled inputs. - Norifumi Kitaura; Youji Iiguni (Signal Process., 2004)

Adaptive DOA estimation using a database of eigenvectors. - Eiji Mochida; Youji Iiguni (ISSPA, 2005)

Adaptive Peak Frequency Estimation Using a Database of PARCOR Coefficients. - Tetsuya Watanabe; Youji Iiguni (EURASIP J. Adv. Signal Process., 2005)

A Noise Reduction Method Based on Linear Prediction with Variable Step-Size. - Arata Kawamura; Youji Iiguni; Yoshio Itoh (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2005)

Adaptive DOA Estimation Using a Database of PARCOR Coefficients. - Eiji Mochida; Youji Iiguni (EURASIP J. Adv. Signal Process., 2006)

An Adaptive Algorithm with Variable Step-Size for Parallel Notch Filter. - Arata Kawamura; Youji Iiguni; Yoshio Itoh (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2006)

Fast computation of RBF coefficients using FFT. - Yoshinori Abe; Youji Iiguni (Signal Process., 2006)

Data compression of nonlinear time series using a hybrid linear/nonlinear predictor. - Tetsuya Izumi; Youji Iiguni (Signal Process., 2006)

Fast Computation of the High Resolution Image Restoration by using the Discrete Cosine Transform. - Yoshinori Abe; Youji Iiguni (ICASSP (1), 2007)

Speech Enhancement Based on MAP Estimation Using a Variable Speech Distribution. - Yuta Tsukamoto; Arata Kawamura; Youji Iiguni (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2007)

Image restoration from a downsampled image by using the DCT. - Yoshinori Abe; Youji Iiguni (Signal Process., 2007)

A sparse periodic decomposition and its application to speech representation. - Makoto Nakashizuka; Hiroyuki Okumura; Youji Iiguni (EUSIPCO, 2008)

Special Section on Signal Processing. - Youji Iiguni (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2008)

Image Enlargement by Nonlinear Frequency Extrapolation with Morphological Operators. - Masayuki Shimizu; Makoto Nakashizuka; Youji Iiguni (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2008)

Single-channel speech separation using a sparse periodic decomposition. - Makoto Nakashizuka; Hiroyuki Okumura; Youji Iiguni (EUSIPCO, 2009)

Sparse image representations with shift-invariant tree-structured dictionaries. - Makoto Nakashizuka; Hidenari Nishiura; Youji Iiguni (ICIP, 2009)

Shift-Invariant Sparse Image Representations Using Tree-Structured Dictionaries. - Makoto Nakashizuka; Hidenari Nishiura; Youji Iiguni (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2009)

Improvement of Speech Quality in Distance-Based Howling Canceller. - Akira Sogami; Arata Kawamura; Youji Iiguni (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2009)

A speech spectral estimator using adaptive speech probability density function. - Arata Kawamura; Weerawut Thanhikam; Youji Iiguni (EUSIPCO, 2010)

Learning of structuring elements for morphological image model with a sparsity prior. - Makoto Nakashizuka; Shinji Takenaka; Youji Iiguni (ICIP, 2010)

Moment Invariants of the Weighted Image. - Ken-ichi Sakaue; Youji Iiguni (IEICE Trans. Inf. Syst., 2010)

Morphological regularization for adaptation of image opening. - Makoto Nakashizuka; Yu Ashihara; Youji Iiguni (EUSIPCO, 2011)

A speech enhancement method using adaptive speech PDF. - Weerawut Thanhikam; Arata Kawamura; Youji Iiguni (ISPACS, 2011)

Noise suppression based on replacement of zero phase signal. - Weerawut Thanhikam; Arata Kawamura; Youji Iiguni (ISPACS, 2011)

A High Speech Quality Distance-Based Howling Canceller with Adaptive Cascade Notch Filter and Silent Pilot Signal. - Akira Sogami; Arata Kawamura; Youji Iiguni (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2011)

An adaptive MAP speech spectral amplitude estimator combined with a zero phase noise suppressor. - Sayuri Kohmura; Arata Kawamura; Youji Iiguni (APSIPA, 2012)

A comb filter with adaptive notch gain for periodic noise reduction. - Yosuke Sugiura; Arata Kawamura; Youji Iiguni (APSIPA, 2012)

Experimental evaluation of structure of garbage model generated from in-vocabulary words. - Shuichiro Hirota; Noboru Hayasaka; Youji Iiguni (ISCIT, 2012)

Feature reduction using PCA with multi-condition training for practical speech recognition systems. - Yudai Kaneda; Noboru Hayasaka; Youji Iiguni (ISCIT, 2012)

Supervised Single-Channel Speech Separation via Sparse Decomposition Using Periodic Signal Models. - Makoto Nakashizuka; Hiroyuki Okumura; Youji Iiguni (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2012)

Convergence Vectors in System Identification with an NLMS Algorithm for Sinusoidal Inputs. - Yuki Satomi; Arata Kawamura; Youji Iiguni (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2012)

A Comb Filter Design Method Using Linear Phase FIR Filter. - Yosuke Sugiura; Arata Kawamura; Youji Iiguni (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2012)

An Adaptive Comb Filter with Flexible Notch Gain. - Yosuke Sugiura; Arata Kawamura; Youji Iiguni (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2012)

Speech Enhancement Based on Real-Speech PDF in Various Narrow SNR Intervals. - Weerawut Thanhikam; Arata Kawamura; Youji Iiguni (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2012)

Stationary and Non-stationary Wide-Band Noise Reduction Using Zero Phase Signal. - Weerawut Thanhikam; Yuki Kamamori; Arata Kawamura; Youji Iiguni (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2012)

An efficient zero phase noise reduction method for impact noise with damped oscillation. - Sayuri Kohmura; Arata Kawamura; Youji Iiguni (ICASSP, 2013)

An Adaptation Method for Morphological Opening Filters with a Smoothness Penalty on Structuring Elements. - Makoto Nakashizuka; Yu Ashihara; Youji Iiguni (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2013)

A Comb Filter with Adaptive Notch Gain and Bandwidth. - Yosuke Sugiura; Arata Kawamura; Youji Iiguni (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2013)

Noise robust speech recognition selectively using noise adapted HMM set. - Hiroyuki Sakuno; Noboru Hayasaka; Youji Iiguni (ICECS, 2014)

Robust voice activity detection using selectively energy features. - Junichiro Wakasugi; Noboru Hayasaka; Youji Iiguni (ICECS, 2014)

Noise robust speaker identification by dividing MFCC. - Kizuki Matsumoto; Noboru Hayasaka; Youji Iiguni (ISCCSP, 2014)

A Zero Phase Noise Reduction Method with Damped Oscillation Estimator. - Sayuri Kohmura; Arata Kawamura; Youji Iiguni (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2014)

Impact noise suppression using spectral phase estimation. - Kohei Fujikura; Arata Kawamura; Youji Iiguni (APSIPA, 2015)

Adaptive feedback canceller with howling detection for hearing aids. - Kakeru Kashima; Arata Kawamura; Masahiro Sunohara; Kazuki Nishiyama; Nobuhiko Hiruma; Youji Iiguni (APSIPA, 2015)

Residual drum sound estimation for RPCA singing voice extraction. - Shiori Mikami; Arata Kawamura; Youji Iiguni (APSIPA, 2017)

Impulsive noise suppression using interpolated zero phase signal. - Ryo Takehara; Arata Kawamura; Youji Iiguni (APSIPA, 2017)

Automatic pencil sketch generation by using canny edges. - Ryota Okawa; Hiromi Yoshida; Youji Iiguni (MVA, 2017)

An Efficient Image to Sound Mapping Method Using Speech Spectral Phase and Multi-Column Image. - Arata Kawamura; Hiro Igarashi; Youji Iiguni (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2017)

Distant Sound Suppression Using Spectral Phase Variance for Two Channel Blind Source Separation. - Kazuhiro Murakami; Arata Kawamura; Youichi Fujisaka; Nobuhiko Hiruma; Youji Iiguni (APSIPA, 2018)

Effective Sound Source Separation Using Single Voice Activity Segments for Binaural Sound. - Wataru Noguchi; Arata Kawamura; Youji Iiguni (APSIPA, 2018)

Alveolar fricative consonants detection with easily interpretable feature for speech training. - Kouki Furuya; Arata Kawamura; Youji Iiguni (ISPACS, 2019)

Adaptive line enhancer-based beat noise suppression for FM radio in motor vehicle. - Kosuke Hasada; Arata Kawamura; Youji Iiguni (ISPACS, 2019)

Distant Sound Source Suppression Based on Multichannel Nonnegative Matrix Factorization with Bases Distance Maximization Penalty. - Kazuma Takiguchi; Arata Kawamura; Youji Iiguni (ISPACS, 2019)

Dehazing with Recovery Level Map: Suppressing Over-Enhancement and Residual Haze. - Kentaro Iwamoto; Hiromi Yoshida; Youji Iiguni (SITIS, 2019)

Low-Light Image Enhancement via Adaptive Shape and Texture Prior. - Kazuki Kurihara; Hiromi Yoshida; Youji Iiguni (SITIS, 2019)

An Efficient Image to Sound Mapping Method Preserving Speech Spectral Envelope. - Yuya Hosoda; Arata Kawamura; Youji Iiguni (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2020)

Pitch Estimation Algorithm for Narrowband Speech Signal using Phase Differences between Harmonics. - Yuya Hosoda; Arata Kawamura; Youji Iiguni (APSIPA ASC, 2021)

Phase Reconstruction for Artificial Bandwidth Extension toward Musical Instrument Sound Signal. - Yuya Hosoda; Arata Kawamura; Youji Iiguni (EUSIPCO, 2021)

Real-Time Distant Sound Source Suppression Using Spectral Phase Difference. - Kazuhiro Murakami; Arata Kawamura; Yoh-ichi Fujisaka; Nobuhiko Hiruma; Youji Iiguni (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2021)

Speech Bandwidth Extension Using Data Hiding Based on Discrete Hartley Transform Domain. - Yuya Hosoda; Arata Kawamura; Youji Iiguni (Circuits Syst. Signal Process., 2022)

Artificial Bandwidth Extension for Lower Bandwidth Using Sinusoidal Synthesis based on First Formant Location. - Yuya Hosoda; Arata Kawamura; Youji Iiguni (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2022)

Complex-Domain Pitch Estimation Algorithm for Narrowband Speech Signals. - Yuya Hosoda; Arata Kawamura; Youji Iiguni (IEEE ACM Trans. Audio Speech Lang. Process., 2023)

Deep Unfolding-Aided Parameter Tuning for Plug-and-Play-Based Video Snapshot Compressive Imaging. - Takashi Matsuda; Ryo Hayakawa; Youji Iiguni (IEEE Access, 2025)

Depth-Aided Color Image Inpainting in Quaternion Domain. - Shunki Tatsumi; Ryo Hayakawa; Youji Iiguni (IEEE Signal Process. Lett., 2025)