Nobuhiko KITAWAKI


Non-reference Objective Quality Evaluation for Noise-Reduced Speech Using Overall Quality Estimation Model
Takeshi YAMADA Yuki KASUYA Yuki SHINOHARA Nobuhiko KITAWAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2010/06/01
Vol. E93-B  No. 6  pp. 1367-1372
Type of Manuscript:  Special Section PAPER (Special Section on Quality of Communication Networks and Services)
Category: 
Keyword: 
non-reference objective quality evaluationnoise-reduced speechoverall quality estimation modelITU-T Rec. P.835ITU-T Rec. P.563
 Summary | Full Text:PDF

Objective Estimation of Word Intelligibility for Noise-Reduced Speech
Takeshi YAMADA Masakazu KUMAKURA Nobuhiko KITAWAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2008/12/01
Vol. E91-B  No. 12  pp. 4075-4077
Type of Manuscript:  LETTER
Category: Multimedia Systems for Communications
Keyword: 
objective estimationword intelligibilitynoise reductionPESQ
 Summary | Full Text:PDF

Detection of Overlapping Speech in Meetings Using Support Vector Machines and Support Vector Regression
Kiyoshi YAMAMOTO Futoshi ASANO Takeshi YAMADA Nobuhiko KITAWAKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/08/01
Vol. E89-A  No. 8  pp. 2158-2165
Type of Manuscript:  PAPER
Category: Engineering Acoustics
Keyword: 
Support Vector MachinesSupport Vector Regressiondetection of overlapping speech
 Summary | Full Text:PDF

Multimedia Quality Prediction Methodologies for Advanced Mobile and IP-Based Telephony
Nobuhiko KITAWAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2006/02/01
Vol. E89-B  No. 2  pp. 262-272
Type of Manuscript:  INVITED PAPER (Special Section on Multimedia QoS Evaluation and Management Technologies)
Category: 
Keyword: 
perceptual QoSquality predictionopinion modelwideband speechmultimediahands-freespeech recognition and synthesis
 Summary | Full Text:PDF

Objective Quality Assessment of Wideband Speech Coding
Nobuhiko KITAWAKI Kou NAGAI Takeshi YAMADA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/03/01
Vol. E88-B  No. 3  pp. 1111-1118
Type of Manuscript:  PAPER
Category: Network
Keyword: 
objective quality assessmentwideband speechW-PESQartificial voice
 Summary | Full Text:PDF

Comparative Assessment of Test Signals Used for Measuring Residual Echo Characteristics
Nobuhiko KITAWAKI Takeshi YAMADA Futoshi ASANO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2003/03/01
Vol. E86-B  No. 3  pp. 1102-1108
Type of Manuscript:  PAPER
Category: Network
Keyword: 
quality assessmentperceptual QoSartificial voiceecho characteristics
 Summary | Full Text:PDF

Comparison of Two Speech and Audio Coders at 8 kb/s from the Viewpoints of Coding Scheme and Quality
Nobuhiko KITAWAKI Takehiro MORIYA Takao KANEKO Naoki IWAKAMI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1998/11/25
Vol. E81-B  No. 11  pp. 2007-2012
Type of Manuscript:  Special Section PAPER (Special Issue on Performance and Quality of Service (QoS) of Multimedia Networks)
Category: Media Management
Keyword: 
TwinVQCS-ACELPG. 729coding qualityInternet
 Summary | Full Text:PDF

Multilingual Speech Data Base for Speech Quality Evaluation and Statistical Features
Hiroshi IRII Kenzo ITOH Nobuhiko KITAWAKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1991/01/25
Vol. E74-A  No. 1  pp. 33-41
Type of Manuscript:  PAPER
Category: Speech
Keyword: 
 Summary | Full Text:PDF