Akio OGIHARA


Sound Quality Evaluation for Audio Watermarking Based on Phase Shift Keying Using BCH Code
Harumi MURATA Akio OGIHARA Masaki UESAKA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2015/01/01
Vol. E98-D  No. 1  pp. 89-94
Type of Manuscript:  Special Section LETTER (Special Section on Enriched Multimedia)
Category: 
Keyword: 
audio watermarkingBCH codephase shift keying
 Summary | Full Text:PDF(537.6KB)

Reversible Watermarking Method for JPEG Images
Akira SHIOZAKI Motoi IWATA Akio OGIHARA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2008/07/01
Vol. E91-D  No. 7  pp. 2068-2071
Type of Manuscript:  LETTER
Category: Application Information Security
Keyword: 
watermarkreversible watermarkingJPEG image
 Summary | Full Text:PDF(265.5KB)

Correlation-Based Video Watermarking Method Using Inter-Frame Similarity
Motoo YAMAMOTO Akira SHIOZAKI Motoi IWATA Akio OGIHARA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/01/01
Vol. E89-A  No. 1  pp. 186-193
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Information Hiding
Keyword: 
digital video watermarkcopyright protectioncorrelation-based watermarkingMPEGStirMark
 Summary | Full Text:PDF(502.9KB)

Discrimination Method of Synthetic Speech Using Pitch Frequency against Synthetic Speech Falsification
Akio OGIHARA Hitoshi UNNO Akira SHIOZAKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2005/01/01
Vol. E88-A  No. 1  pp. 280-286
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Biometrics
Keyword: 
speaker verificationbiometricssynthetic speechpitch frequency
 Summary | Full Text:PDF(516.1KB)

An Isolated Word Speech Recognition Based on Fusion of Visual and Auditory Information Usisng 30-frame/s and 24-bit Color Image
Akio OGIHARA Shinobu ASAO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1997/08/25
Vol. E80-A  No. 8  pp. 1417-1422
Type of Manuscript:  Special Section PAPER (Special Section on Digital Signal Processing)
Category: 
Keyword: 
speech recognitionfusion of visual and auditoryhidden Markov modelsensor fusionfull-frame (30-frame/s) and full-color (24-bit color) image
 Summary | Full Text:PDF(457.5KB)

Speech Recognition Based on Fusion of Visual and Auditory Information Using Full-Framse Color Image
Satoru IGAWA Akio OGIHARA Akira SHINTANI Shinobu TAKAMATSU 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1996/11/25
Vol. E79-A  No. 11  pp. 1836-1840
Type of Manuscript:  Special Section LETTER (Special Section of Letters Selected from the 1996 IEICE General Conference)
Category: 
Keyword: 
speech recognitionfusion of visual and auditorysensor fusionhidden Markov model
 Summary | Full Text:PDF(327.2KB)

An Analysis on Minimum Searching Principle of Chaotic Neural Network
Masaya OHTA Kazumichi MATSUMIYA Akio OGIHARA Shinobu TAKAMATSU Kunio FUKUNAGA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1996/03/25
Vol. E79-A  No. 3  pp. 363-369
Type of Manuscript:  Special Section PAPER (Special Section of Selected Papers from the 8th Karuizawa Workshop on Circuits and Systems)
Category: 
Keyword: 
chaosneural networkminimum searching problemattractor
 Summary | Full Text:PDF(624.2KB)

A Study on Mouth Shape Features Suitable for HMM Speech Recognition Using Fusion of Visual and Auditory Information
Naoshi DOI Akira SHINTANI Yasuhisa HAYASHI Akio OGIHARA Shinobu TAKAMATSU 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1995/11/25
Vol. E78-A  No. 11  pp. 1548-1552
Type of Manuscript:  Special Section LETTER (Special Section of Letters Selected from the 1995 IEICE General Conference)
Category: 
Keyword: 
speech recognitionfusion of visual and auditory informationfeature of mouth shapeimage processing
 Summary | Full Text:PDF(285.7KB)

Asymmetric Neural Network and Its Application to Knapsack Problem
Akira YAMAMOTO Masaya OHTA Hiroshi UEDA Akio OGIHARA Kunio FUKUNAGA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1995/03/25
Vol. E78-A  No. 3  pp. 300-305
Type of Manuscript:  Special Section PAPER (Special Section of Selected Papers from the 7th Karuizawa Workshop on Circuits and Systems)
Category: Neural Networks
Keyword: 
neural networkasymmetric connection matrixknapsack problem
 Summary | Full Text:PDF(485.5KB)

Speech Recognition Using HMM Based on Fusion of Visual and Auditory Information
Akira SHINTANI Akio OGIHARA Yoshikazu YAMAGUCHI Yasuhisa HAYASHI Kunio FUKUNAGA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1994/11/25
Vol. E77-A  No. 11  pp. 1875-1878
Type of Manuscript:  Special Section LETTER (Special Section of Letters Selected from the 1994 IEICE Spring Conference)
Category: 
Keyword: 
speech recognitionfusion of visual and auditorysensor fusionHidden Markov Model
 Summary | Full Text:PDF(239.5KB)

An Improvement of the Pseudoinverse Rule with Diagonal Elements
Hiroshi UEDA Masaya OHTA Akio OGIHARA Kunio FUKUNAGA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1994/06/25
Vol. E77-A  No. 6  pp. 1007-1014
Type of Manuscript:  Special Section PAPER (Special Section of Papers Selected from 1993 Joint Technical Conference on Circuits/Systems, Computers and Communications (JTC-CSCC'93))
Category: Neural Networks
Keyword: 
neural networkpseudoinverse ruleself-feedbackspurious states
 Summary | Full Text:PDF(643.1KB)

A Correcting Method for Pitch Extraction Using Neural Networks
Akio OGIHARA Kunio FUKUNAGA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1994/06/25
Vol. E77-A  No. 6  pp. 1015-1022
Type of Manuscript:  Special Section PAPER (Special Section of Papers Selected from 1993 Joint Technical Conference on Circuits/Systems, Computers and Communications (JTC-CSCC'93))
Category: Neural Networks
Keyword: 
pitch extractionneural networkstime continuationpitch correctionspeech analysisautocorrelation analysis
 Summary | Full Text:PDF(628.3KB)

Binary Neural Network with Negative Self-Feedback and Its Application to N-Queens Problem
Masaya OHTA Akio OGIHARA Kunio FUKUNAGA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 1994/04/25
Vol. E77-D  No. 4  pp. 459-465
Type of Manuscript:  Special Section PAPER (Special Issue on Neurocomputing)
Category: Network Synthesis
Keyword: 
binary neural networknegative self-feedback connectionselection ruleN-Queens problem
 Summary | Full Text:PDF(537.9KB)

An Autocorrelation Associative Neural Network with Self-Feedbacks
Hiroshi UEDA Masaya OHTA Akio OGIHARA Kunio FUKUNAGA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1993/12/25
Vol. E76-A  No. 12  pp. 2072-2075
Type of Manuscript:  Special Section LETTER (Special Section of Letters Selected from the 1993 IEICE Fall Conference)
Category: 
Keyword: 
neural networkautocorrelation associative memoryself-feedbackspurious states
 Summary | Full Text:PDF(259KB)

A Neural Network with a Function of lnhibiting Subtours on TSP
Akira YAMAMOTO Masaya OHTA Hiroshi UEDA Akio OGIHARA Kunio FUKUNAGA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1993/12/25
Vol. E76-A  No. 12  pp. 2068-2071
Type of Manuscript:  Special Section LETTER (Special Section of Letters Selected from the 1993 IEICE Fall Conference)
Category: 
Keyword: 
neural networktraveling salesman problemelimination of subtours
 Summary | Full Text:PDF(229.8KB)

Speech Recognition of lsolated Digits Using Simultaneous Generative Histogram
Yasuhisa HAYASHI Akio OGIHARA Kunio FUKUNAGA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1993/12/25
Vol. E76-A  No. 12  pp. 2052-2054
Type of Manuscript:  Special Section LETTER (Special Section of Letters Selected from the 1993 IEICE Fall Conference)
Category: 
Keyword: 
speech recognitionhidden Markov modelseparate vector quantizationsimultaneous generative histogram
 Summary | Full Text:PDF(214KB)

A Continuous Speech Recognition Algorithm Utilizing Island-Driven A* Search
Yoshikazu YAMAGUCHI Akio OGIHARA Yasuhisa HAYASHI Nobuyuki TAKASU Kunio FUKUNAGA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1993/07/25
Vol. E76-A  No. 7  pp. 1184-1186
Type of Manuscript:  Special Section LETTER (Special Section of Letters Selected from the 1993 IEICE Spring Conference)
Category: 
Keyword: 
A* searchisland-drivenheuristicscontinuous speech recognition
 Summary | Full Text:PDF(218.7KB)

A Theoretical Analysis of Neural Networks with Nonzero Diagonal Elements
Masaya OHTA Yoichiro ANZAI Shojiro YONEDA Akio OGIHARA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1993/03/25
Vol. E76-A  No. 3  pp. 284-291
Type of Manuscript:  Special Section PAPER (Special Section on the 5th Karuizawa Workshop on Circuits and Systems)
Category: 
Keyword: 
neural networkscombinatorial optimization problemsnonzero diagonal elementseigen valueeigen vector
 Summary | Full Text:PDF(691KB)

Associative Neural Network Models Based on a Measure of Manhattan Length
Hiroshi UEDA Yoichiro ANZAI Masaya OHTA Shojiro YONEDA Akio OGIHARA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1993/03/25
Vol. E76-A  No. 3  pp. 277-283
Type of Manuscript:  Special Section PAPER (Special Section on the 5th Karuizawa Workshop on Circuits and Systems)
Category: 
Keyword: 
neural networkassociative memoryPDNlateral inhibitionmultiple-valued pattern
 Summary | Full Text:PDF(610KB)

An SVQ-HMM Training Method Using Simultaneous Generative Histogram
Yasuhisa HAYASHI Satoshi KONDO Nobuyuki TAKASU Akio OGIHARA Shojiro YONEDA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1992/07/25
Vol. E75-A  No. 7  pp. 905-907
Type of Manuscript:  Special Section LETTER (Special Section on the 1992 IEICE Spring Conference)
Category: 
Keyword: 
speech recognitionseparate vector quantizationhidden Markov modelsimultaneous generative histogram
 Summary | Full Text:PDF(212KB)

Recognition of Isolated Digits Using Fuzzy Matrix Quantization
Satoshi KONDO Akio OGIHARA Shojiro YONEDA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1991/10/25
Vol. E74-A  No. 10  pp. 3034-3040
Type of Manuscript:  Special Section PAPER (Special Issue on JTC-CSCC '90)
Category: Speech and Image Processing
Keyword: 
 Summary | Full Text:PDF(446.4KB)

A Continuous Speech Recognition Model Utilizing Subject Transition in Sentences
Nobuyuki TAKASU Akio OGIHARA Satoshi KONDO Shojiro YONEDA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1991/05/25
Vol. E74-A  No. 5  pp. 1031-1033
Type of Manuscript:  Special Section LETTER (Special Issue on 1991 Spring Natl. Conv. IEICE)
Category: Speech Recognition
Keyword: 
 Summary | Full Text:PDF(182.4KB)

Switched-Capacitor Neural Networks and Their Application to Character Recognition
Yoichiro ANZAI Koichi MATSUMOTO Shojiro YONEDA Akio OGIHARA 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1990/12/25
Vol. E73-E  No. 12  pp. 1932-1939
Type of Manuscript:  Special Section PAPER (Special Issue on the 3rd Karuizawa Workshop on Circuits and Systems)
Category: Neural Networks
Keyword: 
 Summary | Full Text:PDF(588.3KB)