Takahiro MURAKAMI


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 DFTwindow functionzero-padding
 Summary | Full Text:PDF(929.5KB)

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: 
CRLBfundamental frequency estimationlength of a signalpitch estimation
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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 NMFauxiliary function methodsignal separation
 Summary | Full Text:PDF(2.2MB)

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 parameterfrequency estimationminimization problemlocal minima
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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: 
similarityFIR filterMSEeigenvalue problemcorrelation coefficient
 Summary | Full Text:PDF(293.9KB)

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 separationconvolutive mixturemultidimensional independent component analysisindependent subspace analysis
 Summary | Full Text:PDF(1.2MB)

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 MOSFETHiSIMcircuit simulationvolume inversion
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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 enhancementspectral subtractionsubspace decompositionMUSIC algorithm
 Summary | Full Text:PDF(583.6KB)