Takeshi IKENAGA


Robust Ghost-Free High-Dynamic-Range Imaging by Visual Salience Based Bilateral Motion Detection and Stack Extension Based Exposure Fusion
Zijie WANG Qin LIU Takeshi IKENAGA 
Publication:   
Publication Date: 2017/11/01
Vol. E100-A  No. 11  pp. 2266-2274
Type of Manuscript:  Special Section PAPER (Special Section on Smart Multimedia & Communication Systems)
Category: Image Processing
Keyword: 
high-dynamic-range imaging (HDRI)visual saliencemotion detectionghost removalexposure fusion
 Summary | Full Text:PDF(9.7MB)

Ball State Based Parallel Ball Tracking and Event Detection for Volleyball Game Analysis
Xina CHENG Norikazu IKOMA Masaaki HONDA Takeshi IKENAGA 
Publication:   
Publication Date: 2017/11/01
Vol. E100-A  No. 11  pp. 2285-2294
Type of Manuscript:  Special Section PAPER (Special Section on Smart Multimedia & Communication Systems)
Category: Vision
Keyword: 
volleyball game analysis3D ball trackingevent detectionparallel system
 Summary | Full Text:PDF(1.9MB)

AIGIF: Adaptively Integrated Gradient and Intensity Feature for Robust and Low-Dimensional Description of Local Keypoint
Songlin DU Takeshi IKENAGA 
Publication:   
Publication Date: 2017/11/01
Vol. E100-A  No. 11  pp. 2275-2284
Type of Manuscript:  Special Section PAPER (Special Section on Smart Multimedia & Communication Systems)
Category: Vision
Keyword: 
local keypoint descriptorgradient magnitudegradient orientationintensity comparisonimage matching
 Summary | Full Text:PDF(3.6MB)

Multi-View 3D Ball Tracking with Abrupt Motion Adaptive System Model, Anti-Occlusion Observation and Spatial Density Based Recovery in Sports Analysis
Xina CHENG Norikazu IKOMA Masaaki HONDA Takeshi IKENAGA 
Publication:   
Publication Date: 2017/05/01
Vol. E100-A  No. 5  pp. 1215-1225
Type of Manuscript:  PAPER
Category: Vision
Keyword: 
sports analysismulti-view 3D ball trackingabrupt motionocclusiontracking recovery
 Summary | Full Text:PDF(1.9MB)

Full-HD 60fps FPGA Implementation of Spatio-Temporal Keypoint Extraction Based on Gradient Histogram and Parallelization of Keypoint Connectivity
Takahiro SUZUKI Takeshi IKENAGA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2016/11/01
Vol. E99-A  No. 11  pp. 1937-1946
Type of Manuscript:  Special Section PAPER (Special Section on Smart Multimedia & Communication Systems)
Category: Vision
Keyword: 
hardware architecturekeypoint extractionSIFTcloudvideo recognition
 Summary | Full Text:PDF(3.3MB)

ROD-SAN: Energy-Efficient and High-Response Wireless Sensor and Actuator Networks Employing Wake-Up Receiver
Hiroyuki YOMO Takahiro KAWAMOTO Kenichi ABE Yuichiro EZURE Tetsuya ITO Akio HASEGAWA Takeshi IKENAGA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2016/09/01
Vol. E99-B  No. 9  pp. 1998-2008
Type of Manuscript:  Special Section PAPER (Special Section on Integration Technologies of Ambient Intelligence and Sensor Networks)
Category: 
Keyword: 
wireless sensor and actuator networkswake-up receiverduty-cyclingexperimental prototype and implementation
 Summary | Full Text:PDF(3.3MB)

Hardware Oriented Enhanced Category Determination Based on CTU Boundary Deblocking Strength Prediction for SAO in HEVC Encoder
Gaoxing CHEN Zhenyu PEI Zhenyu LIU Takeshi IKENAGA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2016/04/01
Vol. E99-A  No. 4  pp. 788-797
Type of Manuscript:  PAPER
Category: Digital Signal Processing
Keyword: 
HEVCsample adaptive offsetcategory determinationhardware oriented
 Summary | Full Text:PDF(8.7MB)

A New Approach to Identify User Authentication Methods toward SSH Dictionary Attack Detection
Akihiro SATOH Yutaka NAKAMURA Takeshi IKENAGA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2015/04/01
Vol. E98-D  No. 4  pp. 760-768
Type of Manuscript:  Special Section PAPER (Special Section on Information and Communication System Security―Against Cyberattacks―)
Category: Authentication
Keyword: 
SSH dictionary attackuser authentication methodflow analysisnetwork operation
 Summary | Full Text:PDF(537.9KB)

Fast Mode and Depth Decision for HEVC Intra Prediction Based on Edge Detection and Partition Reconfiguration
Gaoxing CHEN Lei SUN Zhenyu LIU Takeshi IKENAGA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2014/11/01
Vol. E97-A  No. 11  pp. 2130-2138
Type of Manuscript:  Special Section PAPER (Special Section on Smart Multimedia & Communication Systems)
Category: 
Keyword: 
HEVCintra predictionpartitioningmode decisiongradient
 Summary | Full Text:PDF(1.4MB)

A Mode Mapping and Optimized MV Conjunction Based H.264/SVC to H.264/AVC Transcoder with Medium-Grain Quality Scalability for Videoconferencing
Lei SUN Zhenyu LIU Takeshi IKENAGA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2014/02/01
Vol. E97-A  No. 2  pp. 501-509
Type of Manuscript:  Special Section PAPER (Special Section on Image Media Quality)
Category: 
Keyword: 
SVC-to-AVC transcodingMGS scalabilitymode mappingMV conjunctionvideoconferencing
 Summary | Full Text:PDF(1.7MB)

Low-Complexity Hybrid-Domain H.264/SVC to H.264/AVC Spatial Transcoding with Drift Compensation for Videoconferencing
Lei SUN Zhenyu LIU Takeshi IKENAGA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2013/11/01
Vol. E96-A  No. 11  pp. 2142-2153
Type of Manuscript:  Special Section PAPER (Special Section on Smart Multimedia & Communication Systems)
Category: Image Processing
Keyword: 
SVC-to-AVC transcodingspatial scalabilityhybrid-domaindrift compensationvideoconferencing
 Summary | Full Text:PDF(4.1MB)

A Drift-Constrained Frequency-Domain Ultra-Low-Delay H.264/SVC to H.264/AVC Transcoder with Medium-Grain Quality Scalability for Videoconferencing
Lei SUN Zhenyu LIU Takeshi IKENAGA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2013/06/01
Vol. E96-A  No. 6  pp. 1253-1263
Type of Manuscript:  Special Section PAPER (Special Section on Circuit, System, and Computer Technologies)
Category: 
Keyword: 
SVC-to-AVC transcodingMGS scalabilityfrequency domainlow delayvideoconferencing
 Summary | Full Text:PDF(2MB)

Low Complexity Keypoint Extraction Based on SIFT Descriptor and Its Hardware Implementation for Full-HD 60 fps Video
Takahiro SUZUKI Takeshi IKENAGA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2013/06/01
Vol. E96-A  No. 6  pp. 1376-1383
Type of Manuscript:  Special Section PAPER (Special Section on Circuit, System, and Computer Technologies)
Category: 
Keyword: 
keypoint extractionSIFThardware implementationFPGAparallelizing
 Summary | Full Text:PDF(3.1MB)

Content-Aware Write Reduction Mechanism of 3D Stacked Phase-Change RAM Based Frame Store in H.264 Video Codec System
Sanchuan GUO Zhenyu LIU Guohong LI Takeshi IKENAGA Dongsheng WANG 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2013/06/01
Vol. E96-A  No. 6  pp. 1273-1282
Type of Manuscript:  Special Section PAPER (Special Section on Circuit, System, and Computer Technologies)
Category: 
Keyword: 
phase-change RAM (PRAM)three-dimensional stackingH.264/AVCwrite endurance
 Summary | Full Text:PDF(1.7MB)

A Design and Prototyping of In-Network Processing Platform to Enable Adaptive Network Services
Masayoshi SHIMAMURA Takeshi IKENAGA Masato TSURU 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2013/02/01
Vol. E96-D  No. 2  pp. 238-248
Type of Manuscript:  Special Section PAPER (Special Section on The Internet Architectures, Protocols, and Applications for Diversified Futures)
Category: 
Keyword: 
adaptive network servicesadvanced relay node platformadvanced relay processingprovider-managed overlay networksadaptive packet compression scheme
 Summary | Full Text:PDF(1.5MB)

Low-Complexity Coarse-Level Mode-Mapping Based H.264/AVC to H.264/SVC Spatial Transcoding for Video Conferencing
Lei SUN Jie LENG Jia SU Yiqing HUANG Hiroomi MOTOHASHI Takeshi IKENAGA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2012/05/01
Vol. E95-D  No. 5  pp. 1313-1323
Type of Manuscript:  Special Section PAPER (Special Section on Recent Advances in Multimedia Signal Processing Techniques and Applications)
Category: Video Processing
Keyword: 
AVC-SVC transcodingspatial scalabilitymode-mappinglow-complexityvideo conferencing
 Summary | Full Text:PDF(2MB)

Splitting TCP Connections Adaptively Inside Networks
Masayoshi SHIMAMURA Takeshi IKENAGA Masato TSURU 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2012/02/01
Vol. E95-D  No. 2  pp. 542-545
Type of Manuscript:  Special Section LETTER (Special Section on Architectures, Protocols, and Applications for the Future Internet)
Category: 
Keyword: 
new generation networks (NwGN)advanced relay nodesadaptive split connection schemeTCPQoS
 Summary | Full Text:PDF(355.2KB)

Content Based Coarse to Fine Adaptive Interpolation Filter for High Resolution Video Coding
Jia SU Yiqing HUANG Lei SUN Shinichi SAKAIDA Takeshi IKENAGA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/10/01
Vol. E94-A  No. 10  pp. 2013-2021
Type of Manuscript:  PAPER
Category: Image
Keyword: 
motion compensated prediction (MCP)coarse to fineadaptive interpolation filter (AIF)
 Summary | Full Text:PDF(3.6MB)

Fast H.264/AVC DIRECT Mode Decision Based on Mode Selection and Predicted Rate-Distortion Cost
Xiaocong JIN Jun SUN Yiqing HUANG Jia SU Takeshi IKENAGA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2011/08/01
Vol. E94-D  No. 8  pp. 1653-1662
Type of Manuscript:  PAPER
Category: Image Processing and Video Processing
Keyword: 
spatial DIRECTadaptivefast mode decisionH.264/AVC
 Summary | Full Text:PDF(1.4MB)

Highly Parallel and Fully Reused H.264/AVC High Profile Intra Predictor Generation Engine for Super Hi-Vision 4k4k@60 fps
Yiqing HUANG Xiaocong JIN Jin ZHOU Jia SU Takeshi IKENAGA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2011/04/01
Vol. E94-C  No. 4  pp. 428-438
Type of Manuscript:  Special Section PAPER (Special Section on Circuits and Design Techniques for Advanced Large Scale Integration)
Category: 
Keyword: 
H.264/AVCintra predictionhardware architecturesuper hi-vision
 Summary | Full Text:PDF(1.6MB)

A Novel Cache Replacement Policy via Dynamic Adaptive Insertion and Re-Reference Prediction
Xi ZHANG Chongmin LI Zhenyu LIU Haixia WANG Dongsheng WANG Takeshi IKENAGA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2011/04/01
Vol. E94-C  No. 4  pp. 468-476
Type of Manuscript:  Special Section PAPER (Special Section on Circuits and Design Techniques for Advanced Large Scale Integration)
Category: 
Keyword: 
cache replacementset duelingadaptive insertionshared cache
 Summary | Full Text:PDF(1.2MB)

Architecture and Circuit Optimization of Hardwired Integer Motion Estimation Engine for H.264/AVC
Zhenyu LIU Dongsheng WANG Takeshi IKENAGA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2010/11/01
Vol. E93-A  No. 11  pp. 2065-2073
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Image Processing
Keyword: 
H.264/AVCvariable block size motion estimationhardwired enginevery large scale integration (VLSI)
 Summary | Full Text:PDF(1.3MB)

Constant Bit-Rate Multi-Stage Rate Control for Rate-Distortion Optimized H.264/AVC Encoders
Shuijiong WU Peilin LIU Yiqing HUANG Qin LIU Takeshi IKENAGA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2010/07/01
Vol. E93-D  No. 7  pp. 1716-1726
Type of Manuscript:  Special Section PAPER (Special Section on Machine Vision and its Applications)
Category: 
Keyword: 
H.264/AVC video CBR transmissionmulti-stage rate controlrate-distortion optimizationLagrange multiplierbit allocation
 Summary | Full Text:PDF(1.8MB)

Highly Parallel Fractional Motion Estimation Engine for Super Hi-Vision 4k4k@60 fps
Yiqing HUANG Takeshi IKENAGA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2010/03/01
Vol. E93-C  No. 3  pp. 244-252
Type of Manuscript:  Special Section PAPER (Special Section on Circuits and Design Techniques for Advanced Large Scale Integration)
Category: 
Keyword: 
super hi-visionH.264/AVCFMEVLSI
 Summary | Full Text:PDF(1.1MB)

Compressing Packets Adaptively Inside Networks
Masayoshi SHIMAMURA Hiroyuki KOGA Takeshi IKENAGA Masato TSURU 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2010/03/01
Vol. E93-B  No. 3  pp. 501-515
Type of Manuscript:  Special Section PAPER (Special Section on New Generation Network towards Innovative Future Society)
Category: 
Keyword: 
advanced relay nodeadaptive online lossless packet compression schemenetwork resourcecomputational resource
 Summary | Full Text:PDF(1.4MB)

Macroblock and Motion Feature Analysis to H.264/AVC Fast Inter Mode Decision
Yiqing HUANG Qin LIU Shuijiong WU Zhewen ZHENG Takeshi IKENAGA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2009/12/01
Vol. E92-A  No. 12  pp. 3361-3368
Type of Manuscript:  Special Section PAPER (Special Section on Image Media Quality)
Category: Coding
Keyword: 
mode decisionH.264/AVCfeature analysis
 Summary | Full Text:PDF(923.6KB)

Adaptive Sub-Sampling Based Reconfigurable SAD Tree Architecture for HDTV Application
Yiqing HUANG Qin LIU Satoshi GOTO Takeshi IKENAGA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2009/11/01
Vol. E92-A  No. 11  pp. 2819-2829
Type of Manuscript:  Special Section PAPER (Special Section on Smart Multimedia & Communication Systems)
Category: Video Coding
Keyword: 
reconfigurable architectureH.264/AVCSAD treeVLSIHDTV
 Summary | Full Text:PDF(1.3MB)

VLSI Oriented Fast Motion Estimation Algorithm Based on Pixel Difference, Block Overlapping and Motion Feature Analysis
Yiqing HUANG Qin LIU Satoshi GOTO Takeshi IKENAGA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2009/08/01
Vol. E92-A  No. 8  pp. 1986-1999
Type of Manuscript:  Special Section PAPER (Special Section on Signal Processing)
Category: Realization
Keyword: 
H.264/AVCMEpixel differenceblock overlappingmotion feature
 Summary | Full Text:PDF(1.3MB)

Development of Single Sign-On System with Hardware Token and Key Management Server
Daiki NOBAYASHI Yutaka NAKAMURA Takeshi IKENAGA Yoshiaki HORI 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2009/05/01
Vol. E92-D  No. 5  pp. 826-835
Type of Manuscript:  Special Section PAPER (Special Section on Information and Communication System Security)
Category: Authentication and Authorization Techniques
Keyword: 
single sign-onhardware tokenkey management serverauthenticationsecurity
 Summary | Full Text:PDF(795.9KB)

Hardware-Oriented Early Detection Algorithms for 44 and 88 All-Zero Blocks in H.264
Qin LIU Yiqing HUANG Satoshi GOTO Takeshi IKENAGA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2009/04/01
Vol. E92-A  No. 4  pp. 1063-1071
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: 
all-zero blockearly detectionsum of absolute differencehardware-orientedH.264
 Summary | Full Text:PDF(576.7KB)

An Ultra-Low Bandwidth Design Method for MPEG-2 to H.264/AVC Transcoding
Xianghui WEI Takeshi IKENAGA Satoshi GOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2009/04/01
Vol. E92-A  No. 4  pp. 1072-1079
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: 
H.264MPEG-2transcodingmotion estimationsearch window reuse
 Summary | Full Text:PDF(727.8KB)

High Throughput VLSI Architecture of a Fast Mode Decision Algorithm for H.264/AVC Intra Encoding
Tianruo ZHANG Guifen TIAN Takeshi IKENAGA Satoshi GOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/12/01
Vol. E91-A  No. 12  pp. 3630-3637
Type of Manuscript:  Special Section PAPER (Special Section on VLSI Design and CAD Algorithms)
Category: Embedded, Real-Time and Reconfigurable Systems
Keyword: 
H.264/AVCintra predictionfast mode decision algorithmVLSI architecture
 Summary | Full Text:PDF(870.9KB)

A High Performance Partially-Parallel Irregular LDPC Decoder Based on Sum-Delta Message Passing Schedule
Wen JI Yuta ABE Takeshi IKENAGA Satoshi GOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/12/01
Vol. E91-A  No. 12  pp. 3622-3629
Type of Manuscript:  Special Section PAPER (Special Section on VLSI Design and CAD Algorithms)
Category: Embedded, Real-Time and Reconfigurable Systems
Keyword: 
LDPCmessage passing algorithm
 Summary | Full Text:PDF(565.6KB)

Variable Block Size Motion Vector Retrieval Schemes for H.264 Inter Frame Error Concealment
Lei WANG Jun WANG Satoshi GOTO Takeshi IKENAGA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/10/01
Vol. E91-A  No. 10  pp. 2945-2953
Type of Manuscript:  Special Section PAPER (Special Section on Smart Multimedia & Communication Systems)
Category: Video Coding
Keyword: 
H.264/AVCvariable block size error concealmentmotion vector refinementdirectional spatio-temporal boundary matching algorithm
 Summary | Full Text:PDF(587.6KB)

Macroblock Feature Based Complexity Reduction for H.264/AVC Motion Estimation
Yiqing HUANG Qin LIU Takeshi IKENAGA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/10/01
Vol. E91-A  No. 10  pp. 2934-2944
Type of Manuscript:  Special Section PAPER (Special Section on Smart Multimedia & Communication Systems)
Category: Video Coding
Keyword: 
H.264/AVCMEsimilarity analysismotion analysis
 Summary | Full Text:PDF(1.8MB)

Standard Deviation and Intra Prediction Mode Based Adaptive Spatial Error Concealment (SEC) in H.264/AVC
Jun WANG Lei WANG Takeshi IKENAGA Satoshi GOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/10/01
Vol. E91-A  No. 10  pp. 2954-2962
Type of Manuscript:  Special Section PAPER (Special Section on Smart Multimedia & Communication Systems)
Category: Video Coding
Keyword: 
SECadaptivestandard deviationintra prediction mode
 Summary | Full Text:PDF(1.1MB)

Edge Block Detection and Motion Vector Information Based Fast VBSME Algorithm
Qin LIU Yiqing HUANG Satoshi GOTO Takeshi IKENAGA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/08/01
Vol. E91-A  No. 8  pp. 1935-1943
Type of Manuscript:  Special Section PAPER (Special Section on Signal Processing)
Category: 
Keyword: 
motion estimationaliasingsubsamplingmultiple reference framesearch range
 Summary | Full Text:PDF(876.4KB)

Content-Aware Fast Motion Estimation for H.264/AVC
Zhenyu LIU Satoshi GOTO Takeshi IKENAGA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/08/01
Vol. E91-A  No. 8  pp. 1944-1952
Type of Manuscript:  Special Section PAPER (Special Section on Signal Processing)
Category: 
Keyword: 
H.264/AVCmotion estimationearly terminationmultiple reference framevariable block size
 Summary | Full Text:PDF(1.3MB)

Reconfigurable Variable Block Size Motion Estimation Architecture for Search Range Reduction Algorithm
Yibo FAN Takeshi IKENAGA Satoshi GOTO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2008/04/01
Vol. E91-C  No. 4  pp. 440-448
Type of Manuscript:  Special Section PAPER (Special Section on Advanced Technologies in Digital LSIs and Memories)
Category: 
Keyword: 
reconfigurableVBSMEsearch range reductionH.264
 Summary | Full Text:PDF(1.9MB)

Low Power LDPC Code Decoder Architecture Based on Intermediate Message Compression Technique
Kazunori SHIMIZU Nozomu TOGAWA Takeshi IKENAGA Satoshi GOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/04/01
Vol. E91-A  No. 4  pp. 1054-1061
Type of Manuscript:  Special Section PAPER (Special Section on Selected Papers from the 20th Workshop on Circuits and Systems in Karuizawa)
Category: 
Keyword: 
low-density parity-check codemessage-passing algorithmintermediate message compression techniqueclock gated shift register for intermediate message
 Summary | Full Text:PDF(451.3KB)

Parallel Improved HDTV720p Targeted Propagate Partial SAD Architecture for Variable Block Size Motion Estimation in H.264/AVC
Yiqing HUANG Zhenyu LIU Yang SONG Satoshi GOTO Takeshi IKENAGA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/04/01
Vol. E91-A  No. 4  pp. 987-997
Type of Manuscript:  Special Section PAPER (Special Section on Selected Papers from the 20th Workshop on Circuits and Systems in Karuizawa)
Category: 
Keyword: 
H.264/AVCvariable block size motion estimationhardware architecture
 Summary | Full Text:PDF(846.7KB)

Adaptive Search Range Algorithms for Variable Block Size Motion Estimation in H.264/AVC
Zhenxing CHEN Yang SONG Takeshi IKENAGA Satoshi GOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/04/01
Vol. E91-A  No. 4  pp. 1015-1022
Type of Manuscript:  Special Section PAPER (Special Section on Selected Papers from the 20th Workshop on Circuits and Systems in Karuizawa)
Category: 
Keyword: 
H.264/AVCVBSMEASRMVD
 Summary | Full Text:PDF(1.3MB)

A High-Speed Design of Montgomery Multiplier
Yibo FAN Takeshi IKENAGA Satoshi GOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/04/01
Vol. E91-A  No. 4  pp. 971-977
Type of Manuscript:  Special Section PAPER (Special Section on Selected Papers from the 20th Workshop on Circuits and Systems in Karuizawa)
Category: 
Keyword: 
Montgomery multiplierhigh-speedhigh-radixscalable
 Summary | Full Text:PDF(1.3MB)

A 41 mW VGA@30 fps Quadtree Video Encoder for Video Surveillance Systems
Qin LIU Seiichiro HIRATSUKA Kazunori SHIMIZU Shinsuke USHIKI Satoshi GOTO Takeshi IKENAGA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2008/04/01
Vol. E91-C  No. 4  pp. 449-456
Type of Manuscript:  Special Section PAPER (Special Section on Advanced Technologies in Digital LSIs and Memories)
Category: 
Keyword: 
video surveillance systemmotion estimationME-MC processorquadtreelow power consumption
 Summary | Full Text:PDF(1MB)

An Unequal Secure Encryption Scheme for H.264/AVC Video Compression Standard
Yibo FAN Jidong WANG Takeshi IKENAGA Yukiyasu TSUNOO Satoshi GOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/01/01
Vol. E91-A  No. 1  pp. 12-21
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Symmetric Cryptography
Keyword: 
Unequal Secure Encryptionvideo encryptionselective encryptionH.264/AVCAESLEX
 Summary | Full Text:PDF(2.2MB)

Efficient Fully-Parallel LDPC Decoder Design with Improved Simplified Min-Sum Algorithms
Qi WANG Kazunori SHIMIZU Takeshi IKENAGA Satoshi GOTO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2007/10/01
Vol. E90-C  No. 10  pp. 1964-1971
Type of Manuscript:  Special Section PAPER (Special Section on VLSI Technology toward Frontiers of New Market)
Category: VLSI Architecture for Communication/Server Systems
Keyword: 
area and power efficient fully-parallel LDPC decoderimproved simplified min-sum algorithmspower-saved strategy
 Summary | Full Text:PDF(514.3KB)

Lossy Strict Multilevel Successive Elimination Algorithm for Fast Motion Estimation
Yang SONG Zhenyu LIU Takeshi IKENAGA Satoshi GOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2007/04/01
Vol. E90-A  No. 4  pp. 764-770
Type of Manuscript:  Special Section PAPER (Special Section on Selected Papers from the 19th Workshop on Circuits and Systems in Karuizawa)
Category: 
Keyword: 
motion estimation (ME)successive elimination algorithm (SEA)multilevel successive elimination algorithm (MSEA)strict multilevel successive elimination algorithm (SMSEA)
 Summary | Full Text:PDF(500.5KB)

Lossless VLSI Oriented Full Computation Reusing Algorithm for H.264/AVC Fractional Motion Estimation
Ming SHAO Zhenyu LIU Satoshi GOTO Takeshi IKENAGA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2007/04/01
Vol. E90-A  No. 4  pp. 756-763
Type of Manuscript:  Special Section PAPER (Special Section on Selected Papers from the 19th Workshop on Circuits and Systems in Karuizawa)
Category: 
Keyword: 
H.264/AVCFMEcomputation reusinglosslessVLSI
 Summary | Full Text:PDF(780.5KB)

Low-Power Partial Distortion Sorting Fast Motion Estimation Algorithms and VLSI Implementations
Yang SONG Zhenyu LIU Takeshi IKENAGA Satoshi GOTO 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2007/01/01
Vol. E90-D  No. 1  pp. 108-117
Type of Manuscript:  Special Section PAPER (Special Section on Advanced Image Technology)
Category: 
Keyword: 
motion estimation (ME)partial distortion sorting (PDS)systolic array architecture
 Summary | Full Text:PDF(804.6KB)

Geometrical, Physical and Text/Symbol Analysis Based Approach of Traffic Sign Detection System
Yangxing LIU Takeshi IKENAGA Satoshi GOTO 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2007/01/01
Vol. E90-D  No. 1  pp. 208-216
Type of Manuscript:  Special Section PAPER (Special Section on Advanced Image Technology)
Category: 
Keyword: 
traffic sign detectiongeometrical analysisphysical analysistext detection
 Summary | Full Text:PDF(1.1MB)

Content-Based Complexity Reduction Methods for MPEG-2 to H.264 Transcoding
Shen LI Lingfeng LI Takeshi IKENAGA Shunichi ISHIWATA Masataka MATSUI Satoshi GOTO 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2007/01/01
Vol. E90-D  No. 1  pp. 90-98
Type of Manuscript:  Special Section PAPER (Special Section on Advanced Image Technology)
Category: 
Keyword: 
MPEG-2/H.264 video transcodingcontent-basedmode decisionintra prediction
 Summary | Full Text:PDF(669.7KB)

Power-Efficient LDPC Decoder Architecture Based on Accelerated Message-Passing Schedule
Kazunori SHIMIZU Tatsuyuki ISHIKAWA Nozomu TOGAWA Takeshi IKENAGA Satoshi GOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/12/01
Vol. E89-A  No. 12  pp. 3602-3612
Type of Manuscript:  Special Section PAPER (Special Section on VLSI Design and CAD Algorithms)
Category: VLSI Architecture
Keyword: 
low-density parity-check codesparallel LDPC decoder architecturemessage-passing algorithmFIFO-based buffering
 Summary | Full Text:PDF(1017.1KB)

A Fine-Grain Scalable and Low Memory Cost Variable Block Size Motion Estimation Architecture for H.264/AVC
Zhenyu LIU Yang SONG Takeshi IKENAGA Satoshi GOTO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2006/12/01
Vol. E89-C  No. 12  pp. 1928-1936
Type of Manuscript:  PAPER
Category: Integrated Electronics
Keyword: 
H.264AVCvariable block size motion estimationVLSI architecture
 Summary | Full Text:PDF(666.9KB)

A VLSI Architecture for Variable Block Size Motion Estimation in H.264/AVC with Low Cost Memory Organization
Yang SONG Zhenyu LIU Takeshi IKENAGA Satoshi GOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/12/01
Vol. E89-A  No. 12  pp. 3594-3601
Type of Manuscript:  Special Section PAPER (Special Section on VLSI Design and CAD Algorithms)
Category: VLSI Architecture
Keyword: 
variable block size motion estimation (VBSME)memory organizationH.264/AVC
 Summary | Full Text:PDF(502.7KB)

Partially-Parallel LDPC Decoder Achieving High-Efficiency Message-Passing Schedule
Kazunori SHIMIZU Tatsuyuki ISHIKAWA Nozomu TOGAWA Takeshi IKENAGA Satoshi GOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/04/01
Vol. E89-A  No. 4  pp. 969-978
Type of Manuscript:  Special Section PAPER (Special Section on Selected Papers from the 18th Workshop on Circuits and Systems in Karuizawa)
Category: 
Keyword: 
low-density parity-check codespartially-parallel LDPC decodermessage-passing algorithmFPGA
 Summary | Full Text:PDF(748.2KB)

Scalable VLSI Architecture for Variable Block Size Integer Motion Estimation in H.264/AVC
Yang SONG Zhenyu LIU Satoshi GOTO Takeshi IKENAGA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/04/01
Vol. E89-A  No. 4  pp. 979-988
Type of Manuscript:  Special Section PAPER (Special Section on Selected Papers from the 18th Workshop on Circuits and Systems in Karuizawa)
Category: 
Keyword: 
variable block size motion estimation (VBSME)H.264/AVCvery large scale integration (VLSI) architecture
 Summary | Full Text:PDF(1.4MB)

A Hardware Implementation of a Content-Based Motion Estimation Algorithm for Real-Time MPEG-4 Video Coding
Shen LI Takeshi IKENAGA Hideki TAKEDA Masataka MATSUI Satoshi GOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/04/01
Vol. E89-A  No. 4  pp. 932-940
Type of Manuscript:  Special Section PAPER (Special Section on Selected Papers from the 18th Workshop on Circuits and Systems in Karuizawa)
Category: 
Keyword: 
content-basedmotion estimationpower-efficientreal-timeMPEG-4
 Summary | Full Text:PDF(1.2MB)

A Contour-Based Robust Algorithm for Text Detection in Color Images
Yangxing LIU Satoshi GOTO Takeshi IKENAGA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2006/03/01
Vol. E89-D  No. 3  pp. 1221-1230
Type of Manuscript:  PAPER
Category: Image Recognition, Computer Vision
Keyword: 
text detectiontexture analysisconnected component analysisregion contouredge detection
 Summary | Full Text:PDF(1.2MB)

A Selective Video Encryption Scheme for MPEG Compression Standard
Gang LIU Takeshi IKENAGA Satoshi GOTO Takaaki BABA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/01/01
Vol. E89-A  No. 1  pp. 194-202
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Application
Keyword: 
commercial multimedia applicationsselective encryptionMPEG codecMPEG bitstreamdata shuffleprocessing overheadbit overhead
 Summary | Full Text:PDF(524KB)

A VLSI Array Processing Oriented Fast Fourier Transform Algorithm and Hardware Implementation
Zhenyu LIU Yang SONG Takeshi IKENAGA Satoshi GOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2005/12/01
Vol. E88-A  No. 12  pp. 3523-3530
Type of Manuscript:  Special Section PAPER (Special Section on VLSI Design and CAD Algorithms)
Category: VLSI Architecture
Keyword: 
fast Fourier transform (FFT)array processingsingleton algorithm
 Summary | Full Text:PDF(1.5MB)

A Highly Parallel Architecture for Deblocking Filter in H.264/AVC
Lingfeng LI Satoshi GOTO Takeshi IKENAGA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2005/07/01
Vol. E88-D  No. 7  pp. 1623-1629
Type of Manuscript:  Special Section PAPER (Special Section on Recent Advances in Circuits and Systems--Part 1)
Category: Parallel and/or Distributed Processing Systems
Keyword: 
deblocking filterH.264/AVCparallel memoryadaptive filter
 Summary | Full Text:PDF(935.7KB)

Content-Based Motion Estimation with Extended Temporal-Spatial Analysis
Shen LI Yong JIANG Takeshi IKENAGA Satoshi GOTO 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2005/07/01
Vol. E88-D  No. 7  pp. 1561-1568
Type of Manuscript:  Special Section PAPER (Special Section on Recent Advances in Circuits and Systems--Part 1)
Category: Image Processing and Multimedia Systems
Keyword: 
motion estimationadaptivecontent-basedspatial and temporal correlation
 Summary | Full Text:PDF(990.5KB)

Reconfigurable Adaptive FEC System Based on Reed-Solomon Code with Interleaving
Kazunori SHIMIZU Nozomu TOGAWA Takeshi IKENAGA Satoshi GOTO 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2005/07/01
Vol. E88-D  No. 7  pp. 1526-1537
Type of Manuscript:  Special Section PAPER (Special Section on Recent Advances in Circuits and Systems--Part 1)
Category: Adaptive Signal Processing
Keyword: 
dynamic reconfigurable systemadaptive FECReed-Solomon code with interleaving
 Summary | Full Text:PDF(705.6KB)

Performance Evaluation of Channel Switching Scheme for Packet Data Transmission in Radio Network Controller
Yoshiaki OHTA Kenji KAWAHARA Takeshi IKENAGA Yuji OIE 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2004/05/01
Vol. E87-B  No. 5  pp. 1141-1150
Type of Manuscript:  Special Section PAPER (Special Section on Mobile Multimedia Communications)
Category: Mobile Radio
Keyword: 
IMT-2000W-CDMARNCdedicated channelcommon channel
 Summary | Full Text:PDF(776.3KB)

Performance Analysis of Queue Length Distribution of Tandem Routers for QoS Measurement
Nobuo RYOKI Kenji KAWAHARA Takeshi IKENAGA Yuji OIE 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2003/02/01
Vol. E86-B  No. 2  pp. 614-621
Type of Manuscript:  Special Section PAPER (Special Issue on Internet Technology III)
Category: Traffic Monitoring and Evaluation
Keyword: 
QoS measurementdelay performancecorrelation
 Summary | Full Text:PDF(828.6KB)

QoS Routing Algorithm Based on Multiclasses Traffic Load
Hedia KOCHKAR Takeshi IKENAGA Yuji OIE 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2002/08/01
Vol. E85-D  No. 8  pp. 1219-1225
Type of Manuscript:  Special Section PAPER (Special Issue on New Technologies in the Internet and their Applications)
Category: 
Keyword: 
QoSroutingmulti-classlink cost
 Summary | Full Text:PDF(519.1KB)

Quality of Assured Service through Multiple DiffServ Domains
Kazumi KUMAZOE Yoshiaki HORI Takeshi IKENAGA Yuji OIE 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2002/08/01
Vol. E85-D  No. 8  pp. 1226-1232
Type of Manuscript:  Special Section PAPER (Special Issue on New Technologies in the Internet and their Applications)
Category: 
Keyword: 
diffservend-to-end QoSAFassured forwarding servicemulti-domain
 Summary | Full Text:PDF(436.3KB)

Queue Management of RIO to Achieve High Throughput and Low Delay
Yoshiaki HORI Takeshi IKENAGA Yuji OIE 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2002/01/01
Vol. E85-B  No. 1  pp. 63-69
Type of Manuscript:  Special Section PAPER (Special Issue on Internet Technology II -- Traffic Control and Performance Evaluation in the Internet)
Category: 
Keyword: 
differentiated servicesAF-PHBRIOEWMA
 Summary | Full Text:PDF(682.3KB)

Effectiveness and Issues of Rerouting Algorithms for QoS Networks
Takeshi IKENAGA Kenji KAWAHARA Yuji OIE 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2001/06/01
Vol. E84-B  No. 6  pp. 1553-1560
Type of Manuscript:  Special Section PAPER (Special Issue on New Developments on QoS Technologies for Information Networks)
Category: 
Keyword: 
routingQoS guaranteereroutingperformance evaluation
 Summary | Full Text:PDF(488.3KB)

A Distributed BIST Technique and Its Test Design Platrorm for VLSIs
Takeshi IKENAGA Takeshi OGURA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1995/11/25
Vol. E78-C  No. 11  pp. 1618-1623
Type of Manuscript:  PAPER
Category: Integrated Electronics
Keyword: 
distributed built-in self-testimage processing LSIpseudo random pattern generatorregular patternspace compressor
 Summary | Full Text:PDF(531.5KB)