Akira TAKAHASHI


Collaborative Quality Framework: QoE-Centric Service Operation in Collaboration with Users, Service Providers, and Network Operators
Akira TAKAHASHI Takanori HAYASHI 
Publication:   
Publication Date: 2017/09/01
Vol. E100-B  No. 9  pp. 1554-1563
Type of Manuscript:  INVITED PAPER (Special Issue the Past, Present, and Future of Communications Technologies in the IEICE)
Category: Network
Keyword: 
QoEoperationqualityQoS
 Summary | Full Text:PDF(1.7MB)

FOREWORD
Akira TAKAHASHI 
Publication:   
Publication Date: 2017/01/01
Vol. E100-B  No. 1  pp. 1-1
Type of Manuscript:  FOREWORD
Category: 
Keyword: 
 Summary | Full Text:PDF(208.2KB)

Performance Comparisons of Subjective Quality Assessment Methods for Video
Toshiko TOMINAGA Masataka MASUDA Jun OKAMOTO Akira TAKAHASHI Takanori HAYASHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2014/01/01
Vol. E97-B  No. 1  pp. 66-75
Type of Manuscript:  PAPER
Category: Network
Keyword: 
video qualitysubjective assessment methodperformance comparisonHDQVGAH.264
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No Reference Video-Quality-Assessment Model for Monitoring Video Quality of IPTV Services
Kazuhisa YAMAGISHI Jun OKAMOTO Takanori HAYASHI Akira TAKAHASHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/02/01
Vol. E95-B  No. 2  pp. 435-448
Type of Manuscript:  PAPER
Category: Network
Keyword: 
QoEIPTVmonitoringcompressionpacket loss
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Parametric Packet-Layer Model for Evaluation Audio Quality in Multimedia Streaming Services
Noritsugu EGI Takanori HAYASHI Akira TAKAHASHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2010/06/01
Vol. E93-B  No. 6  pp. 1359-1366
Type of Manuscript:  Special Section PAPER (Special Section on Quality of Communication Networks and Services)
Category: 
Keyword: 
audioquality evaluationparametric packet-layer modelmultimedia streamingIPTVAAC
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Dynamic Bandwidth Allocation Algorithm with Fairness in 1G/10G Coexistence EPON System
Masaki TANAKA Michiya TAKEMOTO Akira TAKAHASHI Kiyoshi SHIMOKASA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/03/01
Vol. E92-B  No. 3  pp. 819-827
Type of Manuscript:  PAPER
Category: Fiber-Optic Transmission for Communications
Keyword: 
DBA10GEPONGEPONcoexistence systemSLA
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Objective Quality Evaluation Method for Noise-Reduced Speech
Noritsugu EGI Hitoshi AOKI Akira TAKAHASHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2008/05/01
Vol. E91-B  No. 5  pp. 1279-1286
Type of Manuscript:  Special Section PAPER (Special Section on Communication Quality)
Category: Subjective and Objective Assessments of Audio and Video Media Quality
Keyword: 
objective qualitysubjective qualitynoise reductionlistening testspeech
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QoE Estimation Method for Interconnected VoIP Networks Employing Different Codecs
Akira TAKAHASHI Noritsugu EGI Atsuko KURASHIMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/12/01
Vol. E90-B  No. 12  pp. 3572-3578
Type of Manuscript:  PAPER
Category: Network
Keyword: 
VoIPobjective quality assessmentspeech qualitysubjective qualityQoEE-model
 Summary | Full Text:PDF(787.9KB)

Subjective Quality Estimation Model for Video Streaming Services with Dynamic Bit-Rate Control
Takanori HAYASHI Ginga KAWAGUTI Jun OKAMOTO Akira TAKAHASHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2006/02/01
Vol. E89-B  No. 2  pp. 297-303
Type of Manuscript:  Special Section PAPER (Special Section on Multimedia QoS Evaluation and Management Technologies)
Category: 
Keyword: 
video streamingdynamic bit-rate controlQoSquality estimationsubjective assessment
 Summary | Full Text:PDF(312.5KB)

A Shape Resolution Control of Textured Object Applying Tolerance Caused by Movement
Daisuke WAKATSUKI Ikuo ISHII Akira TAKAHASHI 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2006/01/01
Vol. E89-D  No. 1  pp. 28-36
Type of Manuscript:  Special Section PAPER (Special Section on Artificial Reality and Telexistence)
Category: 
Keyword: 
virtual realitylevel of detailmovementtextureoctree
 Summary | Full Text:PDF(1.2MB)

Methods of Improving the Accuracy and Reproducibility of Objective Quality Assessment of VoIP Speech
Akira TAKAHASHI Masataka MASUDA Atsuko KURASHIMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2004/06/01
Vol. E87-B  No. 6  pp. 1660-1669
Type of Manuscript:  PAPER
Category: Multimedia Systems
Keyword: 
VoIPobjective quality assessmentspeech qualitysubjective qualityQoS
 Summary | Full Text:PDF(412.4KB)

Transition of Magnetization Direction in AS-MO Disks
Junji HIROKANE Yoshiteru MURAKAMI Akira TAKAHASHI Shigeo TERASHIMA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1999/12/25
Vol. E82-C  No. 12  pp. 2117-2124
Type of Manuscript:  INVITED PAPER (Special Issue on Information Storage Technologies for the 21st Century)
Category: 
Keyword: 
magneto-optical diskMSRAS-MOin-plane magnetizationmean field theory
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A Study on Key Technologies to Realize Magneto-Optical Storage of Over 7 GBytes in CD Sized Disk
Kenji TORAZAWA Satoshi SUMI Seiji YONEZAWA Naomi SUZUKI Yasuhito TANAKA Akira TAKAHASHI Yoshiteru MURAKAMI Norio OHTA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1997/09/25
Vol. E80-C  No. 9  pp. 1142-1148
Type of Manuscript:  INVITED PAPER (Special Issue on High Density Information Recording Technologies)
Category: 
Keyword: 
magneto-optical diskCAD-MSRoptical super resolutionlaser pumped read-outPRML
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A Camera Calibration Method Using Parallelogramatic Grid Points
Akira TAKAHASHI Ikuo ISHII Hideo MAKINO Makoto NAKASHIZUKA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 1996/11/25
Vol. E79-D  No. 11  pp. 1579-1587
Type of Manuscript:  PAPER
Category: Image Processing,Computer Graphics and Pattern Recognition
Keyword: 
camera calibrationcomputer visionlens distortion3-D measurementperspective projection
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