Yutaka FUKUI


Threshold Equalization for On-Line Signature Verification
Isao NAKANISHI Hiroyuki SAKAMOTO Yoshio ITOH Yutaka FUKUI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/08/01
Vol. E91-A  No. 8  pp. 2244-2247
Type of Manuscript:  LETTER
Category: Cryptography and Information Security
Keyword: 
on-line signature verificationscore level fusionthreshold equalizationmulti-matcherDWT
 Summary | Full Text:PDF(253.5KB)

Speech Noise Reduction System Based on Frequency Domain ALE Using Windowed Modified DFT Pair
Isao NAKANISHI Yuudai NAGATA Takenori ASAKURA Yoshio ITOH Yutaka FUKUI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/04/01
Vol. E89-A  No. 4  pp. 950-959
Type of Manuscript:  Special Section PAPER (Special Section on Selected Papers from the 18th Workshop on Circuits and Systems in Karuizawa)
Category: 
Keyword: 
speech processingnoise reductionadaptive line enhancerfrequency domaindecorrelation parametermodified DFT pairwindow function
 Summary | Full Text:PDF(1.2MB)

DWT Domain On-Line Signature Verification Using the Pen-Movement Vector
Isao NAKANISHI Hiroyuki SAKAMOTO Naoto NISHIGUCHI Yoshio ITOH Yutaka FUKUI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/04/01
Vol. E89-A  No. 4  pp. 1129-1131
Type of Manuscript:  LETTER
Category: Information Security
Keyword: 
on-line signature verificationDWTpen-movement vectorcomputational complexity
 Summary | Full Text:PDF(94.1KB)

Multi-Matcher On-Line Signature Verification System in DWT Domain
Isao NAKANISHI Hiroyuki SAKAMOTO Naoto NISHIGUCHI Yoshio ITOH Yutaka FUKUI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/01/01
Vol. E89-A  No. 1  pp. 178-185
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Information Hiding
Keyword: 
on-line signature verificationDWTmulti-matcherpen-positionpen-movement angle
 Summary | Full Text:PDF(643KB)

Parallel Composition Based Adaptive Notch Filter: Performance and Analysis
Arata KAWAMURA Yoshio ITOH James OKELLO Masaki KOBAYASHI Yutaka FUKUI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/07/01
Vol. E87-A  No. 7  pp. 1747-1755
Type of Manuscript:  PAPER
Category: Digital Signal Processing
Keyword: 
adaptive notch filterconvergence performancefrequency estimationbias
 Summary | Full Text:PDF(1.1MB)

A Realization of Multiple Circuit Transfer Functions Using OTA-C Integrator Loop Structure
Takao TSUKUTANI Masami HIGASHIMURA Yasutomo KINUGASA Yasuaki SUMI Yutaka FUKUI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2003/02/01
Vol. E86-A  No. 2  pp. 509-512
Type of Manuscript:  LETTER
Category: Analog Signal Processing
Keyword: 
operational transconductance amplifiersgrounded capacitorshigh-passband-stop and all-pass transfer functionscontinuous-time filter circuit
 Summary | Full Text:PDF(414.8KB)

A New Noise Reduction Method Using Estimated Noise Spectrum
Arata KAWAMURA Kensaku FUJII Yoshio ITOH Yutaka FUKUI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2002/04/01
Vol. E85-A  No. 4  pp. 784-789
Type of Manuscript:  Special Section PAPER (Special Section of Selected Papers from the 14th Workshop on Circuits and Systems in Karuizawa)
Category: 
Keyword: 
noise reductionlinear predictionadaptive digital filtersignal whiteningnoise reconstruction
 Summary | Full Text:PDF(533.2KB)

Electronically Tunable Current-Mode Biquad Using OTAs and Grounded Capacitors
Takao TSUKUTANI Masami HIGASHIMURA Yasuaki SUMI Yutaka FUKUI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2001/10/01
Vol. E84-A  No. 10  pp. 2595-2599
Type of Manuscript:  LETTER
Category: Analog Signal Processing
Keyword: 
current-mode circuitoperational transconductance amplifierbiquad characteristicscontinuous-time filter circuit
 Summary | Full Text:PDF(289.1KB)

Improvement of Active Net Model for Region Detection in an Image
Noboru YABUKI Yoshitaka MATSUDA Makoto OTA Yasuaki SUMI Yutaka FUKUI Shigehiko MIKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2001/03/01
Vol. E84-A  No. 3  pp. 720-726
Type of Manuscript:  Special Section PAPER (Special Section of Selected Papers from the 13th Workshop on Circuits and Systems in Karuizawa)
Category: 
Keyword: 
Active Netregion detectionenergy optimizationimage processing
 Summary | Full Text:PDF(1.4MB)

The Automatic Counting of Chlorella Using Image Processing and Neural Network
Yasuaki SUMI Makoto OTA Noboru YABUKI Shigeki OBOTE Yoshitaka MATSUDA Yutaka FUKUI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2001/03/01
Vol. E84-A  No. 3  pp. 794-796
Type of Manuscript:  Special Section LETTER (Special Section of Selected Papers from the 13th Workshop on Circuits and Systems in Karuizawa)
Category: 
Keyword: 
chlorellacountingpattern recognitionneural networkback propagation
 Summary | Full Text:PDF(187.8KB)

An Adaptive Algorithm for Cascaded Notch Filter with Reduced Bias
James OKELLO Shin'ichi ARITA Yoshio ITOH Yutaka FUKUI Masaki KOBAYASHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2001/02/01
Vol. E84-A  No. 2  pp. 589-596
Type of Manuscript:  PAPER
Category: Digital Signal Processing
Keyword: 
adaptive notch filterfrequency estimationbias
 Summary | Full Text:PDF(356.5KB)

Robust DSP Type Squaring Loop with Adaptive Notch Filter Type Frequency Estimator and Adaptive BPF
Shigeki OBOTE Yasuaki SUMI Yoshio ITOH Yutaka FUKUI Masaki KOBAYASHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2001/02/01
Vol. E84-A  No. 2  pp. 441-448
Type of Manuscript:  Special Section PAPER (Special Section on Noise Cancellation and Reduction Techniques)
Category: Narrow-Band Interference Cancellation
Keyword: 
squaring loopcoherent detectionBPSKadaptive notch filterfrequency estimator
 Summary | Full Text:PDF(1.1MB)

On the Necessity of Estimating the Transfer Level in an Allpass-FIR ADF by the Use of Lyapunov Criteria
James OKELLO Shin'ichi ARITA Yoshio ITOH Yutaka FUKUI Masaki KOBAYASHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2000/05/25
Vol. E83-A  No. 5  pp. 888-894
Type of Manuscript:  PAPER
Category: Digital Signal Processing
Keyword: 
allpass filtertransfer levelLyapunov criteria
 Summary | Full Text:PDF(612.7KB)

PLL Frequency Synthesizer with Binary Phase Comparison
Shigeki OBOTE Yasuaki SUMI Naoki KITAI Yutaka FUKUI Yoshio ITOH 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2000/03/25
Vol. E83-A  No. 3  pp. 427-434
Type of Manuscript:  Special Section PAPER (Special Section of Selected Papers from the 12th Workshop on Circuits and Systems in Karuizawa)
Category: 
Keyword: 
PLL frequency synthesizerbinary phase comparison
 Summary | Full Text:PDF(959.1KB)

Prescaler PLL Frequency Synthesizer with Multi-Programmable Divider
Yasuaki SUMI Shigeki OBOTE Naoki KITAI Hidekazu ISHII Ryousuke FURUHASHI Yutaka FUKUI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2000/03/25
Vol. E83-A  No. 3  pp. 421-426
Type of Manuscript:  Special Section PAPER (Special Section of Selected Papers from the 12th Workshop on Circuits and Systems in Karuizawa)
Category: 
Keyword: 
PLL frequency synthesizerprescalermulti-programmable divider(N+1/2) programmable divider
 Summary | Full Text:PDF(1.1MB)

Introduction of Orthonormal Transform into Neural Filter for Accelerating Convergence Speed
Isao NAKANISHI Yoshio ITOH Yutaka FUKUI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2000/02/25
Vol. E83-A  No. 2  pp. 367-370
Type of Manuscript:  Special Section LETTER (Special Section on Intelligent Signal and Image Processing)
Category: 
Keyword: 
transform domain neural filterneural filtermulti-layer neural networksback-propagation algorithmnormalized step size
 Summary | Full Text:PDF(183.8KB)

A Newton Based Adaptive Algorithm for IIR ADF Using Allpass and FIR Filter
James OKELLO Yoshio ITOH Yutaka FUKUI Masaki KOBAYASHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1999/07/25
Vol. E82-A  No. 7  pp. 1305-1313
Type of Manuscript:  PAPER
Category: Digital Signal Processing
Keyword: 
adaptive IIR filtersystem identificationNewton algorithmLMS algorithm
 Summary | Full Text:PDF(754.7KB)

Region Extraction Using Color Feature and Active Net Model in Color Image
Noboru YABUKI Yoshitaka MATSUDA Hiroyuki KIMURA Yutaka FUKUI Shigehiko MIKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1999/03/25
Vol. E82-A  No. 3  pp. 466-472
Type of Manuscript:  Special Section PAPER (Special Section on Selected Papers from the 11th Workshop on Circuits and Systems in Karuizawa)
Category: 
Keyword: 
color imageactive netregion detectionimage processingroad sign
 Summary | Full Text:PDF(551KB)

Speedup of Frequency Switching Time in PLL Frequency Synthesizers Using a Target Frequency Detector
Shigeki OBOTE Yasuaki SUMI Naoki KITAI Kouichi SYOUBU Yutaka FUKUI Yoshio ITOH 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1999/03/25
Vol. E82-A  No. 3  pp. 436-441
Type of Manuscript:  Special Section PAPER (Special Section on Selected Papers from the 11th Workshop on Circuits and Systems in Karuizawa)
Category: 
Keyword: 
PLL frequency synthesizertarget frequency detectorfast frequency switching
 Summary | Full Text:PDF(450.8KB)

PLL Frequency Synthesizer with Multi-Phase Detector
Yasuaki SUMI Kouichi SYOUBU Shigeki OBOTE Yutaka FUKUI Yoshio ITOH 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1999/03/25
Vol. E82-A  No. 3  pp. 431-435
Type of Manuscript:  Special Section PAPER (Special Section on Selected Papers from the 11th Workshop on Circuits and Systems in Karuizawa)
Category: 
Keyword: 
PLL frequency synthesizermulti-phase detectorspeedup of lock up time
 Summary | Full Text:PDF(323.7KB)

A Simple Algorithm for Adaptive Allpass-FIR Digital Filter Using Lattice Allpass Filter with Minimum Multipliers
James OKELLO Yoshio ITOH Yutaka FUKUI Masaki KOBAYASHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1999/01/25
Vol. E82-A  No. 1  pp. 138-144
Type of Manuscript:  PAPER
Category: Digital Signal Processing
Keyword: 
adaptive filterlattice IIR filterallpass filterorthogonalityresidue theorem
 Summary | Full Text:PDF(393.7KB)

A New Structure of Frequency Domain Adaptive Filter with Composite Algorithm
Isao NAKANISHI Yoshihisa HAMAHASHI Yoshio ITOH Yutaka FUKUI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1998/04/25
Vol. E81-A  No. 4  pp. 649-655
Type of Manuscript:  PAPER
Category: Digital Signal Processing
Keyword: 
frequency domain adaptive filtervariable step size algorithmcomposite adaptive algorithmadaptive line enhancerDFTFFT
 Summary | Full Text:PDF(675.5KB)

A New Linear Prediction Filter Based Adaptive Algorithm For IIR ADF Using Allpass and Minimum Phase System
James OKELLO Yoshio ITOH Yutaka FUKUI Masaki KOBAYASHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1998/01/25
Vol. E81-A  No. 1  pp. 123-130
Type of Manuscript:  PAPER
Category: Digital Signal Processing
Keyword: 
adaptive IIR filtersystem identificationadaptive algorithmlinear predictor filtersignal decorrelation
 Summary | Full Text:PDF(618.7KB)

FOREWORD
Yutaka FUKUI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1997/08/25
Vol. E80-A  No. 8  pp. 1351-1351
Type of Manuscript:  FOREWORD
Category: 
Keyword: 
 Summary | Full Text:PDF(79.2KB)

PLL Frequency Synthesizer for Low Power Consumption
Yasuaki SUMI Kouichi SYOUBU Kazutoshi TSUDA Shigeki OBOTE Yutaka FUKUI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1997/03/25
Vol. E80-A  No. 3  pp. 461-465
Type of Manuscript:  Special Section PAPER (Special Section of Selected Papers from the 9th Karuizawa Workshop on Circuits and Systems)
Category: 
Keyword: 
low power consumptionPLL frequency synthesizerfrequency extenderprogrammable divideroperating frequencyprescaler
 Summary | Full Text:PDF(387.7KB)

Reduction of Computational Complexity in the IA Algorithm
Isao NAKANISHI Yoshio ITOH Yutaka FUKUI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1996/11/25
Vol. E79-A  No. 11  pp. 1918-1921
Type of Manuscript:  LETTER
Category: Digital Signal Processing
Keyword: 
adaptive filterIA algorithmreduction of computational complexityswitching algorithm
 Summary | Full Text:PDF(287.9KB)

Performance Analysis and Improvement of the NACF Algorithm
Isao NAKANISHI Yoshio ITOH Yutaka FUKUI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1996/08/25
Vol. E79-A  No. 8  pp. 1246-1251
Type of Manuscript:  Special Section LETTER (Special Section on Digital Signal Processing)
Category: 
Keyword: 
adaptive filterperformance analysisbias termvariable step size
 Summary | Full Text:PDF(414.6KB)

A New Adaptive Convergence Factor Algorithm with the Constant Damping Parameter
Isao NAKANISHI Yutaka FUKUI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1995/06/25
Vol. E78-A  No. 6  pp. 649-655
Type of Manuscript:  Special Section PAPER (Special Section of Papers Selected from 1994 Joint Technical Conference on Circuits/Systems, Computers and Communications (JTC-CSCC '94))
Category: 
Keyword: 
adaptive filteradaptive convergence factor algorithmdamping parameternormalization
 Summary | Full Text:PDF(518.4KB)

Cancellation Technique of Parasitics in Active Filter Design
Takao TSUKUTAKI Masaru ISHIDA Yutaka FUKUI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1993/06/25
Vol. E76-A  No. 6  pp. 957-960
Type of Manuscript:  Special Section LETTER (Special Section on Papers Selected from 1992 Joint Technical Conference on Circuits/Systems,Computers and Communications (JTC-CSCC'92))
Category: Methods and Circuits for Signal Processing
Keyword: 
active filtersoperational amplifiersparasiticshighpass characteristics
 Summary | Full Text:PDF(182.2KB)

A Dual Transformation Approach to Current-Mode Filter Synthesis
WANG Guo-Hua Kenzo WATANABE Yutaka FUKUI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1992/06/25
Vol. E75-C  No. 6  pp. 729-735
Type of Manuscript:  PAPER
Category: Electronic Circuits
Keyword: 
dual transformationcurrent-modefilteractive RC and SC circuits
 Summary | Full Text:PDF(486KB)

Realization of Immittance Floatator Using Nullors
Masami HIGASHIMURA Yutaka FUKUI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1992/06/25
Vol. E75-A  No. 6  pp. 644-649
Type of Manuscript:  Special Section PAPER (Special Section of Papers Selected from 1991 Joint Technical Conference on Circuits/Systems, Computers and Communications (JTC-CSCC '91))
Category: Analog-IC Circuit Analysis and Synthesis
Keyword: 
active networksfloating immittancescurrent conveyors
 Summary | Full Text:PDF(311.7KB)

Cancellation Technique of Parasitic Poles for Active-R Highpass Filter
Takao TSUKUTANI Masaru ISHIDA Yutaka FUKUI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1991/10/25
Vol. E74-A  No. 10  pp. 3083-3085
Type of Manuscript:  Special Section LETTER (Special Issue on JTC-CSCC '90)
Category: Analog Filters
Keyword: 
 Summary | Full Text:PDF(113.6KB)

Immittance Function Simulator Using a Single Current Conveyor
Akinori HIMURA Yutaka FUKUI Masaru ISHIDA Masami HIGASHIMURA 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1989/12/25
Vol. E72-E  No. 12  pp. 1279-1284
Type of Manuscript:  Special Section PAPER (Special Issue on the 2nd Karuizawa Workshop on Circuits and Systems)
Category: Analog Signal Processing
Keyword: 
 Summary | Full Text:PDF(398.4KB)