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IEICE Trans

Takahiro MURAKAMI

Dilated Semi-Dense Convolutional Network for Multichannel Speech Enhancement
Tomohiro UEYAMA Koichi ICHIGE Takahiro MURAKAMI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2026/06/01
Vol. E109-A  No. 6  pp. 1165-1169
Type of Manuscript:  LETTER
Category: Digital Signal Processing
Keyword: 
speech enhancement, denoising, dereverberation, speech separation, machine learning, convolutional network, 
 Summary | Full Text:PDF
Deep Multiplicative Update Algorithm for Nonnegative Matrix Factorization and Its Application to Audio Signals
Hiroki TANJI Takahiro MURAKAMI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2023/07/01
Vol. E106-A  No. 7  pp. 962-975
Type of Manuscript:  PAPER
Category: Digital Signal Processing
Keyword: 
nonnegative matrix factorization, multiplicative update algorithm, deep unfolding, audio denoising, supervised signal separation, 
 Summary | Full Text:PDF
Generalized Sliding Discrete Fourier Transform
Takahiro MURAKAMI Yoshihisa ISHIDA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2016/01/01
Vol. E99-A  No. 1  pp. 338-345
Type of Manuscript:  PAPER
Category: Digital Signal Processing
Keyword: 
sliding DFT, window function, zero-padding, 
 Summary | Full Text:PDF
Minimum Length of a Signal for Fundamental Frequency Estimation and Its Application
Takahiro MURAKAMI Hiroyuki YAMAGISHI Yoshihisa ISHIDA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2015/09/01
Vol. E98-A  No. 9  pp. 1914-1923
Type of Manuscript:  PAPER
Category: Digital Signal Processing
Keyword: 
CRLB, fundamental frequency estimation, length of a signal, pitch estimation, 
 Summary | Full Text:PDF
Derivation of Update Rules for Convolutive NMF Based on Squared Euclidean Distance, KL Divergence, and IS Divergence
Hiroki TANJI Ryo TANAKA Kyohei TABATA Yoshito ISEKI Takahiro MURAKAMI Yoshihisa ISHIDA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2014/11/01
Vol. E97-A  No. 11  pp. 2121-2129
Type of Manuscript:  Special Section PAPER (Special Section on Smart Multimedia & Communication Systems)
Category: 
Keyword: 
convolutive NMF, auxiliary function method, signal separation, 
 Summary | Full Text:PDF
Sinusoidal Parameter Estimation Using Roots of an Algebraic Equation
Takahiro MURAKAMI Yoshihisa ISHIDA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/07/01
Vol. E94-A  No. 7  pp. 1487-1496
Type of Manuscript:  PAPER
Category: Digital Signal Processing
Keyword: 
sinusoidal parameter, frequency estimation, minimization problem, local minima, 
 Summary | Full Text:PDF
Measurement of Similarity between Latent Variables
Takahiro MURAKAMI Toshihisa TANAKA Yoshihisa ISHIDA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2009/03/01
Vol. E92-A  No. 3  pp. 824-831
Type of Manuscript:  Special Section PAPER (Special Section on Latest Advances in Fundamental Theories of Signal Processing)
Category: 
Keyword: 
similarity, FIR filter, MSE, eigenvalue problem, correlation coefficient, 
 Summary | Full Text:PDF
Time-Domain Blind Signal Separation of Convolutive Mixtures via Multidimensional Independent Component Analysis
Takahiro MURAKAMI Toshihisa TANAKA Yoshihisa ISHIDA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2009/03/01
Vol. E92-A  No. 3  pp. 733-744
Type of Manuscript:  Special Section PAPER (Special Section on Latest Advances in Fundamental Theories of Signal Processing)
Category: 
Keyword: 
blind signal separation, convolutive mixture, multidimensional independent component analysis, independent subspace analysis, 
 Summary | Full Text:PDF
Compact Double-Gate Metal-Oxide-Semiconductor Field Effect Transistor Model for Device/Circuit Optimization
Norio SADACHIKA Takahiro MURAKAMI Hideki OKA Ryou TANABE Hans Juergen MATTAUSCH Mitiko MIURA-MATTAUSCH 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2008/08/01
Vol. E91-C  No. 8  pp. 1379-1381
Type of Manuscript:  LETTER
Category: Semiconductor Materials and Devices
Keyword: 
double gate MOSFET, HiSIM, circuit simulation, volume inversion, 
 Summary | Full Text:PDF
Speech Enhancement by Spectral Subtraction Based on Subspace Decomposition
Takahiro MURAKAMI Tetsuya HOYA Yoshihisa ISHIDA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2005/03/01
Vol. E88-A  No. 3  pp. 690-701
Type of Manuscript:  PAPER
Category: Speech and Hearing
Keyword: 
speech enhancement, spectral subtraction, subspace decomposition, MUSIC algorithm, 
 Summary | Full Text:PDF