Takafumi AOKI


Automatic Generation System for Multiple-Valued Galois-Field Parallel Multipliers
Rei UENO Naofumi HOMMA Takafumi AOKI 
Publication:   
Publication Date: 2017/08/01
Vol. E100-D  No. 8  pp. 1603-1610
Type of Manuscript:  Special Section PAPER (Special Section on Multiple-Valued Logic and VLSI Computing)
Category: VLSI Architecture
Keyword: 
GF arithmetic circuitsformal designparallel multipliersautomatic generationmultiple-valued logic
 Summary | Full Text:PDF(979.3KB)

Hierarchical Formal Verification Combining Algebraic Transformation with PPRM Expansion and Its Application to Masked Cryptographic Processors
Rei UENO Naofumi HOMMA Takafumi AOKI Sumio MORIOKA 
Publication:   
Publication Date: 2017/07/01
Vol. E100-A  No. 7  pp. 1396-1408
Type of Manuscript:  Special Section PAPER (Special Section on Design Methodologies for System on a Chip)
Category: 
Keyword: 
design methodology for security hardwareformal designcryptographic processorsGalois fieldarithmetic circuits
 Summary | Full Text:PDF(2.3MB)

Power Analysis on Unrolled Architecture with Points-of-Interest Search and Its Application to PRINCE Block Cipher
Ville YLI-MÄYRY Naofumi HOMMA Takafumi AOKI 
Publication:   
Publication Date: 2017/01/01
Vol. E100-A  No. 1  pp. 149-157
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
low latency cipherscryptographic hardwareside-channel attacksunrolled architecturespower analysis
 Summary | Full Text:PDF(2.2MB)

Phase-Based Window Matching with Geometric Correction for Multi-View Stereo
Shuji SAKAI Koichi ITO Takafumi AOKI Takafumi WATANABE Hiroki UNTEN 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2015/10/01
Vol. E98-D  No. 10  pp. 1818-1828
Type of Manuscript:  PAPER
Category: Image Recognition, Computer Vision
Keyword: 
multi-view stereowindow matchinggeometric correctionphase-only correlation
 Summary | Full Text:PDF(2.9MB)

Electromagnetic Analysis against Public-Key Cryptographic Software on Embedded OS
Hajime UNO Sho ENDO Naofumi HOMMA Yu-ichi HAYASHI Takafumi AOKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2015/07/01
Vol. E98-B  No. 7  pp. 1242-1249
Type of Manuscript:  Special Section PAPER (Special Section on Electromagnetic Compatibility Technology in Conjunction with Main Topics of EMC'14/Tokyo)
Category: 
Keyword: 
EM information securityside-channel attackembedded OSelectromagnetic analysisRSA softwarechosen-message simple electromagnetic analysis
 Summary | Full Text:PDF(4.5MB)

An Adaptive Multiple-Fault Injection Attack on Microcontrollers and a Countermeasure
Sho ENDO Naofumi HOMMA Yu-ichi HAYASHI Junko TAKAHASHI Hitoshi FUJI Takafumi AOKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2015/01/01
Vol. E98-A  No. 1  pp. 171-181
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Foundation
Keyword: 
embedded microcontrollerscryptographic softwarefault injection attacks
 Summary | Full Text:PDF(3.3MB)

Efficient DFA on SPN-Based Block Ciphers and Its Application to the LED Block Cipher
Rei UENO Naofumi HOMMA Takafumi AOKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2015/01/01
Vol. E98-A  No. 1  pp. 182-191
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Foundation
Keyword: 
differential fault analysisfault injection attacksubstitution-permutation networkLED block cipherlightweight cryptography
 Summary | Full Text:PDF(969.9KB)

Formal Design of Arithmetic Circuits over Galois Fields Based on Normal Basis Representations
Kotaro OKAMOTO Naofumi HOMMA Takafumi AOKI 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2014/09/01
Vol. E97-D  No. 9  pp. 2270-2277
Type of Manuscript:  Special Section PAPER (Special Section on Multiple-Valued Logic and VLSI Computing)
Category: VLSI Architecture
Keyword: 
arithmetic circuitsformal verificationnormal basiscomputer algebra
 Summary | Full Text:PDF(1.2MB)

Power Noise Measurements of Cryptographic VLSI Circuits Regarding Side-Channel Information Leakage
Daisuke FUJIMOTO Noriyuki MIURA Makoto NAGATA Yuichi HAYASHI Naofumi HOMMA Takafumi AOKI Yohei HORI Toshihiro KATASHITA Kazuo SAKIYAMA Thanh-Ha LE Julien BRINGER Pirouz BAZARGAN-SABET Shivam BHASIN Jean-Luc DANGER 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2014/04/01
Vol. E97-C  No. 4  pp. 272-279
Type of Manuscript:  Special Section PAPER (Special Section on Solid-State Circuit Design,---,Architecture, Circuit, Device and Design Methodology)
Category: 
Keyword: 
information leakageside-channel attackcorrelation power analysisadvance encryption standard
 Summary | Full Text:PDF(4MB)

Chosen-IV Correlation Power Analysis on KCipher-2 Hardware and a Masking-Based Countermeasure
Takafumi HIBIKI Naofumi HOMMA Yuto NAKANO Kazuhide FUKUSHIMA Shinsaku KIYOMOTO Yutaka MIYAKE Takafumi AOKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2014/01/01
Vol. E97-A  No. 1  pp. 157-166
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Symmetric Key Based Cryptography
Keyword: 
side-channel attacksKCipher-2correlation power analysisrandom masking
 Summary | Full Text:PDF(6.7MB)

Fast and Robust 3D Correspondence Matching and Its Application to Volume Registration
Yuichiro TAJIMA Kinya FUDANO Koichi ITO Takafumi AOKI 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2013/04/01
Vol. E96-D  No. 4  pp. 826-835
Type of Manuscript:  Special Section PAPER (Special Section on Medical Imaging)
Category: Medical Image Processing
Keyword: 
CTMRIregistrationphase-only correlationGPU
 Summary | Full Text:PDF(1.7MB)

Evaluation of Information Leakage from Cryptographic Hardware via Common-Mode Current
Yu-ichi HAYASHI Naofumi HOMMA Takaaki MIZUKI Takeshi SUGAWARA Yoshiki KAYANO Takafumi AOKI Shigeki MINEGISHI Akashi SATOH Hideaki SONE Hiroshi INOUE 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2012/06/01
Vol. E95-C  No. 6  pp. 1089-1097
Type of Manuscript:  PAPER
Category: Electronic Components
Keyword: 
information securityelectromagnetic information leakagecryptographic modulesside-channel attackscommon-mode currents
 Summary | Full Text:PDF(2.3MB)

A Configurable On-Chip Glitchy-Clock Generator for Fault Injection Experiments
Sho ENDO Takeshi SUGAWARA Naofumi HOMMA Takafumi AOKI Akashi SATOH 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2012/01/01
Vol. E95-A  No. 1  pp. 263-266
Type of Manuscript:  Special Section LETTER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
faulty injection attacksclock glitchRSAsafe-error attack
 Summary | Full Text:PDF(1.6MB)

Acceleration of FDTD Method Using a Novel Algorithm on the Cell B.E.
Sho ENDO Jun SONODA Motoyuki SATO Takafumi AOKI 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2011/12/01
Vol. E94-D  No. 12  pp. 2338-2344
Type of Manuscript:  Special Section PAPER (Special Section on Parallel and Distributed Computing and Networking)
Category: 
Keyword: 
FDTD methodCell B.E.DMA transfersparallel computing with region segmentation
 Summary | Full Text:PDF(403.5KB)

High-Performance Architecture for Concurrent Error Detection for AES Processors
Takeshi SUGAWARA Naofumi HOMMA Takafumi AOKI Akashi SATOH 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/10/01
Vol. E94-A  No. 10  pp. 1971-1980
Type of Manuscript:  PAPER
Category: Cryptography and Information Security
Keyword: 
dependable architecturesfault injection attackstamper resistanceerror detection
 Summary | Full Text:PDF(2.9MB)

Multiple-Valued Constant-Power Adder and Its Application to Cryptographic Processor
Naofumi HOMMA Yuichi BABA Atsushi MIYAMOTO Takafumi AOKI 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2010/08/01
Vol. E93-D  No. 8  pp. 2117-2125
Type of Manuscript:  Special Section PAPER (Special Section on Multiple-Valued Logic and VLSI Computing)
Category: Application of Multiple-Valued VLSI
Keyword: 
cryptographic processorsside-channel attacksarithmetic circuitsmultiple-valued logicRSA cryptosystem
 Summary | Full Text:PDF(977KB)

Score-Level Fusion of Phase-Based and Feature-Based Fingerprint Matching Algorithms
Koichi ITO Ayumi MORITA Takafumi AOKI Hiroshi NAKAJIMA Koji KOBAYASHI Tatsuo HIGUCHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2010/03/01
Vol. E93-A  No. 3  pp. 607-616
Type of Manuscript:  PAPER
Category: Image
Keyword: 
fingerprint recognitionphase-only correlationfeature-based matchingcombination of matchersscore-level fusionbiometrics
 Summary | Full Text:PDF(844.1KB)

A Robust 3D Face Recognition Algorithm Using Passive Stereo Vision
Akihiro HAYASAKA Koichi ITO Takafumi AOKI Hiroshi NAKAJIMA Koji KOBAYASHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2009/04/01
Vol. E92-A  No. 4  pp. 1047-1055
Type of Manuscript:  Special Section PAPER (Special Section on Advanced Technologies Emerging Mainly from the 21st Workshop on Circuits and Systems in Karuizawa)
Category: 
Keyword: 
biometricsface recognition3D facefacial expressionphase-only correlation
 Summary | Full Text:PDF(3.1MB)

High-Accuracy Estimation of Image Rotation Using 1D Phase-Only Correlation
Sei NAGASHIMA Koichi ITO Takafumi AOKI Hideaki ISHII Koji KOBAYASHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2009/01/01
Vol. E92-A  No. 1  pp. 235-243
Type of Manuscript:  PAPER
Category: Digital Signal Processing
Keyword: 
image registrationrotation estimationphase correlation
 Summary | Full Text:PDF(960KB)

Arithmetic Circuit Verification Based on Symbolic Computer Algebra
Yuki WATANABE Naofumi HOMMA Takafumi AOKI Tatsuo HIGUCHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/10/01
Vol. E91-A  No. 10  pp. 3038-3046
Type of Manuscript:  PAPER
Category: VLSI Design Technology and CAD
Keyword: 
datapatharithmetic circuitsformal verificationcomputer algebra
 Summary | Full Text:PDF(754.8KB)

An Image Completion Algorithm Using Occlusion-Free Images from Internet Photo Sharing Sites
Hanieh AMIRSHAHI Satoshi KONDO Koichi ITO Takafumi AOKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/10/01
Vol. E91-A  No. 10  pp. 2918-2927
Type of Manuscript:  Special Section PAPER (Special Section on Smart Multimedia & Communication Systems)
Category: Image Processing
Keyword: 
image completionimage analysisimage compostingimage processingdatabase searching
 Summary | Full Text:PDF(1.2MB)

A Passive 3D Face Recognition System and Its Performance Evaluation
Akihiro HAYASAKA Takuma SHIBAHARA Koichi ITO Takafumi AOKI Hiroshi NAKAJIMA Koji KOBAYASHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/08/01
Vol. E91-A  No. 8  pp. 1974-1981
Type of Manuscript:  Special Section PAPER (Special Section on Signal Processing)
Category: 
Keyword: 
biometricsface recognitionphase-only correlationstereo vision3D measurement
 Summary | Full Text:PDF(2MB)

A Palmprint Recognition Algorithm Using Phase-Only Correlation
Koichi ITO Takafumi AOKI Hiroshi NAKAJIMA Koji KOBAYASHI Tatsuo HIGUCHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/04/01
Vol. E91-A  No. 4  pp. 1023-1030
Type of Manuscript:  Special Section PAPER (Special Section on Selected Papers from the 20th Workshop on Circuits and Systems in Karuizawa)
Category: 
Keyword: 
biometricspalmprint recognitionsecurityimage recognitionphase-only correlation
 Summary | Full Text:PDF(2.9MB)

A High-Resolution Phase-Based Waveform Matching and Its Application to Side-Channel Attacks
Naofumi HOMMA Sei NAGASHIMA Takeshi SUGAWARA Takafumi AOKI Akashi SATOH 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/01/01
Vol. E91-A  No. 1  pp. 193-202
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Side Channel Attacks
Keyword: 
side-channel attacksDPADEMAcryptographic modulewaveform matchingphase-only correlation
 Summary | Full Text:PDF(1.2MB)

A Dental Radiograph Recognition System Using Phase-Only Correlation for Human Identification
Koichi ITO Akira NIKAIDO Takafumi AOKI Eiko KOSUGE Ryota KAWAMATA Isamu KASHIMA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/01/01
Vol. E91-A  No. 1  pp. 298-305
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Biometrics
Keyword: 
dental biometricsdental radiographimage registrationimage matchingphase-only correlationbiometrics
 Summary | Full Text:PDF(2MB)

Formal Design of Arithmetic Circuits Based on Arithmetic Description Language
Naofumi HOMMA Yuki WATANABE Takafumi AOKI Tatsuo HIGUCHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/12/01
Vol. E89-A  No. 12  pp. 3500-3509
Type of Manuscript:  Special Section PAPER (Special Section on VLSI Design and CAD Algorithms)
Category: Circuit Synthesis
Keyword: 
datapathsformal designarithmetic circuitshardware algorithmshardware description languagemodule generator
 Summary | Full Text:PDF(874.3KB)

Systematic Interpretation of Redundant Arithmetic Adders in Binary and Multiple-Valued Logic
Naofumi HOMMA Takafumi AOKI Tatsuo HIGUCHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2006/11/01
Vol. E89-C  No. 11  pp. 1645-1654
Type of Manuscript:  Special Section PAPER (Special Section on Novel Device Architectures and System Integration Technologies)
Category: 
Keyword: 
datapathsarithmetic circuitsaddition algorithmsnumber systemsmultiple-valued logic
 Summary | Full Text:PDF(856KB)

A High-Accuracy Passive 3D Measurement System Using Phase-Based Image Matching
Mohammad Abdul MUQUIT Takuma SHIBAHARA Takafumi AOKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/03/01
Vol. E89-A  No. 3  pp. 686-697
Type of Manuscript:  Special Section PAPER (Special Section on Multidimensional Signal Processing and Its Application)
Category: Image/Vision Processing
Keyword: 
3D measurementstereo visionphase-based image matchingphase-only correlationoutlier detection
 Summary | Full Text:PDF(1.7MB)

A Shortest Path Search Algorithm Using an Excitable Digital Reaction-Diffusion System
Koichi ITO Masahiko HIRATSUKA Takafumi AOKI Tatsuo HIGUCHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/03/01
Vol. E89-A  No. 3  pp. 735-743
Type of Manuscript:  Special Section PAPER (Special Section on Multidimensional Signal Processing and Its Application)
Category: Signal Processing Algorithm
Keyword: 
reaction-diffusion systemnonlinear dynamicsshortest path searchexcitable dynamics
 Summary | Full Text:PDF(2.5MB)

Semi-Automatic Video Object Segmentation Using LVQ with Color and Spatial Features
Hariadi MOCHAMAD Hui Chien LOY Takafumi AOKI 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2005/07/01
Vol. E88-D  No. 7  pp. 1553-1560
Type of Manuscript:  Special Section PAPER (Special Section on Recent Advances in Circuits and Systems--Part 1)
Category: Image Processing and Multimedia Systems
Keyword: 
object extractionobject segmentationlearning vector quantizationvideo processingMPEG
 Summary | Full Text:PDF(1.9MB)

A Single-Electron-Transistor Logic Gate Family for Binary, Multiple-Valued and Mixed-Mode Logic
Katsuhiko DEGAWA Takafumi AOKI Tatsuo HIGUCHI Hiroshi INOKAWA Yasuo TAKAHASHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2004/11/01
Vol. E87-C  No. 11  pp. 1827-1836
Type of Manuscript:  Special Section PAPER (Special Section on New System Paradigms for Integrated Electronics)
Category: 
Keyword: 
single-electron transistorsmultiple-valued logicquantum deviceslogic circuitsparallel counters
 Summary | Full Text:PDF(1.1MB)

A Simulation Methodology for Single-Electron Multiple-Valued Logics and Its Application to a Latched Parallel Counter
Hiroshi INOKAWA Yasuo TAKAHASHI Katsuhiko DEGAWA Takafumi AOKI Tatsuo HIGUCHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2004/11/01
Vol. E87-C  No. 11  pp. 1818-1826
Type of Manuscript:  Special Section PAPER (Special Section on New System Paradigms for Integrated Electronics)
Category: 
Keyword: 
single-electron transistor (SET)multiple-valued logic (MVL)counteranalytical modelSPICE
 Summary | Full Text:PDF(646.3KB)

A Redox Microarray--An Experimental Model for Molecular Computing Integrated Circuits--
Masahiko HIRATSUKA Shigeru IKEDA Takafumi AOKI Tatsuo HIGUCHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2004/11/01
Vol. E87-C  No. 11  pp. 1804-1808
Type of Manuscript:  Special Section PAPER (Special Section on New System Paradigms for Integrated Electronics)
Category: 
Keyword: 
molecular electronicsmolecular computingreaction-diffusion dynamicsnonlinear dynamicsanalog integrated circuits
 Summary | Full Text:PDF(2.4MB)

A Sub-Pixel Correspondence Search Technique for Computer Vision Applications
Kenji TAKITA Mohammad Abdul MUQUIT Takafumi AOKI Tatsuo HIGUCHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/08/01
Vol. E87-A  No. 8  pp. 1913-1923
Type of Manuscript:  Special Section PAPER (Special Section on Digital Signal Processing)
Category: Image/Visual Signal Processing
Keyword: 
phase-only correlationphase correlationimage matchingsub-pixel matchingblock matching
 Summary | Full Text:PDF(999.8KB)

A Fingerprint Matching Algorithm Using Phase-Only Correlation
Koichi ITO Hiroshi NAKAJIMA Koji KOBAYASHI Takafumi AOKI Tatsuo HIGUCHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/03/01
Vol. E87-A  No. 3  pp. 682-691
Type of Manuscript:  Special Section PAPER (Special Section on Applications and Implementations of Digital Signal Processing)
Category: Digital Signal Processing for Pattern Recognition
Keyword: 
phase-only correlationphase-only matched filteringphase correlationbiometricsfingerprint verificationfingerprint identification
 Summary | Full Text:PDF(3.1MB)

Counter Tree Diagrams: A Unified Framework for Analyzing Fast Addition Algorithms
Jun SAKIYAMA Naofumi HOMMA Takafumi AOKI Tatsuo HIGUCHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2003/12/01
Vol. E86-A  No. 12  pp. 3009-3019
Type of Manuscript:  Special Section PAPER (Special Section on VLSI Design and CAD Algorithms)
Category: IP Design
Keyword: 
computer arithmetic algorithmsparallel countersmultipliersdatapathVLSIcircuit synthesis
 Summary | Full Text:PDF(905.4KB)

High-Accuracy Subpixel Image Registration Based on Phase-Only Correlation
Kenji TAKITA Takafumi AOKI Yoshifumi SASAKI Tatsuo HIGUCHI Koji KOBAYASHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2003/08/01
Vol. E86-A  No. 8  pp. 1925-1934
Type of Manuscript:  Special Section PAPER (Special Section on Digital Signal Processing)
Category: 
Keyword: 
image registrationsubpixel registrationimage matchingphase-only correlationphase correlation
 Summary | Full Text:PDF(700.5KB)

Design of a Field-Programmable Digital Filter Chip Using Multiple-Valued Current-Mode Logic
Katsuhiko DEGAWA Takafumi AOKI Tatsuo HIGUCHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2003/08/01
Vol. E86-A  No. 8  pp. 2001-2010
Type of Manuscript:  Special Section PAPER (Special Section on Digital Signal Processing)
Category: 
Keyword: 
multiple-valued logicsignal processorFPGAsFIR filters
 Summary | Full Text:PDF(2.9MB)

Fingerprint Restoration Using Digital Reaction-Diffusion System and Its Evaluation
Koichi ITO Takafumi AOKI Tatsuo HIGUCHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2003/08/01
Vol. E86-A  No. 8  pp. 1916-1924
Type of Manuscript:  Special Section PAPER (Special Section on Digital Signal Processing)
Category: 
Keyword: 
reaction-diffusion systempattern formationdigital signal processingdigital filtersfingerprint restoration
 Summary | Full Text:PDF(7.5MB)

Parallel Evolutionary Graph Generation with Terminal-Color Constraint and Its Application to Current-Mode Logic Circuit Design
Masanori NATSUI Takafumi AOKI Tatsuo HIGUCHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2002/09/01
Vol. E85-A  No. 9  pp. 2061-2071
Type of Manuscript:  Special Section PAPER (Special Section on Nonlinear Theory and Its Applications)
Category: 
Keyword: 
multiple-valued logicarithmetic circuitevolutionary computationgenetic algorithm (GA)
 Summary | Full Text:PDF(1.2MB)

Parallel Evolutionary Design of Constant-Coefficient Multipliers
Dingjun CHEN Takafumi AOKI Naofumi HOMMA Tatsuo HIGUCHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2002/02/01
Vol. E85-A  No. 2  pp. 508-512
Type of Manuscript:  LETTER
Category: VLSI Design Technology and CAD
Keyword: 
evolutionary graph generationmultiplierPC clusterscanonical signed-digit (CSD) number representation
 Summary | Full Text:PDF(718.4KB)

Design of High-Radix VLSI Dividers without Quotient Selection Tables
Takafumi AOKI Kimihiko NAKAZAWA Tatsuo HIGUCHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2001/11/01
Vol. E84-A  No. 11  pp. 2623-2631
Type of Manuscript:  Special Section PAPER (Special Section on VLSI Design and CAD Algorithms)
Category: VLSI Design
Keyword: 
computer arithmeticSRT divisionhigh-radix divisionsigned-digit number systemsVLSI
 Summary | Full Text:PDF(1.2MB)

Evolutionary Graph Generation System with Terminal-Color Constraint--An Application to Multiple-Valued Logic Circuit Synthesis--
Masanori NATSUI Takafumi AOKI Tatsuo HIGUCHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2001/11/01
Vol. E84-A  No. 11  pp. 2808-2810
Type of Manuscript:  Special Section LETTER (Special Section on VLSI Design and CAD Algorithms)
Category: Analog Synthesis
Keyword: 
multiple-valued logicarithmetic circuitsevolutionary computationgenetic algorithm
 Summary | Full Text:PDF(343.3KB)

Digital Reaction-Diffusion System--A Foundation of Bio-Inspired Texture Image Processing--
Koichi ITO Takafumi AOKI Tatsuo HIGUCHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2001/08/01
Vol. E84-A  No. 8  pp. 1909-1918
Type of Manuscript:  Special Section PAPER (Special Section on Digital Signal Processing)
Category: Image/Visual Signal Processing
Keyword: 
reaction-diffusion systempattern formationdigital signal processingdigital filters
 Summary | Full Text:PDF(4.4MB)

Evolutionary Synthesis of Fast Constant-Coefficient Multipliers
Naofumi HOMMA Takafumi AOKI Tatsuo HIGUCHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2000/09/25
Vol. E83-A  No. 9  pp. 1767-1777
Type of Manuscript:  PAPER
Category: Nonlinear Problems
Keyword: 
circuit designcomputer arithmeticarithmetic circuitsevolvable hardwareevolutionary computation
 Summary | Full Text:PDF(982.5KB)

Radix-2-4-8 CORDIC for Fast Vector Rotation
Takafumi AOKI Ichiro KITAORI Tatsuo HIGUCHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2000/06/25
Vol. E83-A  No. 6  pp. 1106-1114
Type of Manuscript:  Special Section PAPER (Special Section of Papers Selected from 1999 International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC'99))
Category: 
Keyword: 
computer arithmeticarithmetic circuitsCORDICVLSIdigital signal processing
 Summary | Full Text:PDF(1.2MB)

A Code-Division Multiplexing Technique for Efficient Data Transmission in VLSI Systems
Yasushi YUMINAKA Kazuhiko ITOH Yoshisato SASAKI Takafumi AOKI Tatsuo HIGUCHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1999/09/25
Vol. E82-C  No. 9  pp. 1669-1677
Type of Manuscript:  Special Section PAPER (Special Issue on Integrated Electronics and New System Paradigms)
Category: Non-Binary Architectures
Keyword: 
VLSI systemscode division multiplexingm-sequencenew paradigm computingspread-spectrum image processing
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Signed-Weight Arithmetic and Its Application to a Field-Programmable Digital Filter Architecture
Takafumi AOKI Yoshiki SAWADA Tatsuo HIGUCHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1999/09/25
Vol. E82-C  No. 9  pp. 1687-1698
Type of Manuscript:  Special Section PAPER (Special Issue on Integrated Electronics and New System Paradigms)
Category: Configurable Computing and Fault Tolerance
Keyword: 
computer arithmeticredundant number systemsdigital signal processingFIR filterFPGAs
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Pattern Formation in Reaction-Diffusion Enzyme Transistor Circuits
Masahiko HIRATSUKA Takafumi AOKI Tatsuo HIGUCHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1999/09/25
Vol. E82-A  No. 9  pp. 1809-1817
Type of Manuscript:  Special Section PAPER (Special Section on Nonlinear Theory and Its Applications)
Category: 
Keyword: 
molecular computingmolecular devicesreaction-diffusion dynamicspattern formationnonlinear signal processingparallel processing
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Evolutionary Design of Arithmetic Circuits
Takafumi AOKI Naofumi HOMMA Tatsuo HIGUCHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1999/05/25
Vol. E82-A  No. 5  pp. 798-806
Type of Manuscript:  Special Section PAPER (Special Section on Discrete Mathematics and Its Applications)
Category: 
Keyword: 
circuit designcomputer arithmeticarithmetic circuitsevolvable hardwareevolutionary computation
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Design and Analysis of Multiwave Interconnection Networks for MCM-Based Parallel Processing
Takafumi AOKI Shinichi SHIONOYA Tatsuo HIGUCHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1997/07/25
Vol. E80-C  No. 7  pp. 935-940
Type of Manuscript:  Special Section PAPER (Special Issue on New Concept Device and Novel Architecture LSIs)
Category: Novel Concept Devices
Keyword: 
parallel processinginterconnection networksmessage-passing multiprocessor systemsmultichip module (MCM)optical interconnections
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Design of Wave-Parallel Computing Architectures and Its Application to Massively Parallel Image Processing
Yasushi YUMINAKA Takafumi AOKI Tatsuo HIGUCHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1993/07/25
Vol. E76-C  No. 7  pp. 1133-1143
Type of Manuscript:  Special Section PAPER (Special Issue on New Architecture LSIs)
Category: Multiple-Valued Architectures and Systems
Keyword: 
multiple-valued logicset-valued logicparallel processingfrequency multiplexing
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Optical Multiplex Computing Based on Set-Valued Logic and Its Application to Parallel Sorting Networks
Shuichi MAEDA Takafumi AOKI Tatsuo HIGUCHI 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 1993/05/25
Vol. E76-D  No. 5  pp. 605-615
Type of Manuscript:  Special Section PAPER (Special Issue on Multiple-Valued Logic)
Category: Optical Logic
Keyword: 
optical computingoptoelectronic integrated circuitsset-valued logicmultiple-valued logicparallel processing
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