Mitsuo OHTA


A Digital Filter for Stochastic Systems with Unknown Structure and Its Application to Psychological Evaluation of Sound Environment
Akira IKUTA Hisako MASUIKE Mitsuo OHTA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2005/07/01
Vol. E88-D  No. 7  pp. 1519-1525
Type of Manuscript:  Special Section PAPER (Special Section on Recent Advances in Circuits and Systems--Part 1)
Category: Adaptive Signal Processing
Keyword: 
unknown structural systemquantized observationdigital filterpsychological evaluationsound environment
 Summary | Full Text:PDF(312.3KB)

Two Methodology-Trials Using Higher Order Correlation for Reverberation Measurement of Noisy Acoustic Room
Kiminobu NISHIMURA Mitsuo OHTA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/03/01
Vol. E87-A  No. 3  pp. 598-604
Type of Manuscript:  Special Section PAPER (Special Section on Applications and Implementations of Digital Signal Processing)
Category: Audio/Speech Coding
Keyword: 
digital filterelimination of background noisemutual informationroom acousticsreverberation measurement
 Summary | Full Text:PDF(421.2KB)

A Cancellation Method of Background Noise for a Sound Environment System with Unknown Structure
Akira IKUTA Osman TOKHI Mitsuo OHTA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2001/02/01
Vol. E84-A  No. 2  pp. 457-466
Type of Manuscript:  Special Section PAPER (Special Section on Noise Cancellation and Reduction Techniques)
Category: Noise Cancellation for Acoustic System
Keyword: 
cancellation of background noiseunknown structuresound environment system
 Summary | Full Text:PDF(926KB)

Stochastic Evaluation of Acoustic Environment with Noise Cancellation under Introduction of Hierarchically Functional Type Probability Model
Yoshifumi FUJITA Mitsuo OHTA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2001/02/01
Vol. E84-A  No. 2  pp. 467-474
Type of Manuscript:  Special Section PAPER (Special Section on Noise Cancellation and Reduction Techniques)
Category: Noise Cancellation for Acoustic System
Keyword: 
extended regression functionstatistical independencynoise cancellationprediction of response probabilityindoor-outdoor acoustic system
 Summary | Full Text:PDF(138.3KB)

A Stochastic Estimation of Non-stationary Sound Signals Based on Elimination of Background Noise through Vibration Measurement
Mitsuo OHTA Kiminobu NISHIMURA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2000/01/25
Vol. E83-A  No. 1  pp. 158-161
Type of Manuscript:  LETTER
Category: Engineering Acoustics
Keyword: 
non-stationary noiseprobabilistic evaluationexclucive propertygeneralized regression model
 Summary | Full Text:PDF(149.3KB)

A Stochastic Evaluation Method on the Elimination of Background Sound Noises with Aid of Vibration Information and Its Experiment
Kiminobu NISHIMURA Mitsuo OHTA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1999/04/25
Vol. E82-A  No. 4  pp. 597-604
Type of Manuscript:  Special Section PAPER (Special Section on Advanced Signal Processing Techniques for Analysis of Acoustical and Vibrational Signals)
Category: 
Keyword: 
vibration measurementprobabilistic evaluationenvironmental noisegeneralized regression modelprediction of noise distribution
 Summary | Full Text:PDF(457.9KB)

A Probabilistic Evaluation Method of Output Response Based on the Extended Regression Analysis Method for Sound Insulation Systems with Roughly Observed Data
Noboru NAKASAKO Mitsuo OHTA Yasuo MITANI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1997/08/25
Vol. E80-A  No. 8  pp. 1410-1416
Type of Manuscript:  Special Section PAPER (Special Section on Digital Signal Processing)
Category: 
Keyword: 
quantized-level observationsBayes' theoremextended regression analysisjoint probability density functionoutput response probability distribution
 Summary | Full Text:PDF(546.8KB)

A State Estimation Method in Acoustic Environment Based on Fuzzy Observation Contaminated by Background Noise Utilization of Inverse Probability and Digital Filter
Akira IKUTA Mitsuo OHTA Noboru NAKASAKO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1997/05/25
Vol. E80-A  No. 5  pp. 825-832
Type of Manuscript:  Special Section PAPER (Special Section on Acoustical Inverse Problems)
Category: 
Keyword: 
state estimationfuzzy observationinverse probabilityacoustic environment
 Summary | Full Text:PDF(559KB)

A Probabilistic Evaluation Method of Discriminating System Characteristics from Background Noise by Use of Multi-Output Observations in a Complicated Sound Environment
Noboru NAKASAKO Mitsuo OHTA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1996/08/25
Vol. E79-A  No. 8  pp. 1252-1255
Type of Manuscript:  Special Section LETTER (Special Section on Digital Signal Processing)
Category: 
Keyword: 
sound insulation systemSEA methodbackground noiseequivalence of moment statisticssimultaneous multi-output observationsprediction of response probability
 Summary | Full Text:PDF(263.7KB)

A Stochastic Evaluation Theory of Arbitrary Acoustic System Response and Its Application to Various Type Sound Insulation Systems--Equivalence Transformation Toward the Standard Hermite Expansion Type Probability Expression--
Mitsuo OHTA Hitoshi OGAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1995/04/25
Vol. E78-A  No. 4  pp. 536-540
Type of Manuscript:  LETTER
Category: Acoustic
Keyword: 
equivalence transformationsystem response probability evaluationexpansion probability expressionstochastic approximation method
 Summary | Full Text:PDF(313.1KB)

Some New Type Regression Analysis Methods for Acoustic Environmental System Based on the Introduction of Multiplicative Noise
Mitsuo OHTA Akira IKUTA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1995/01/25
Vol. E78-A  No. 1  pp. 123-126
Type of Manuscript:  LETTER
Category: Acoustics
Keyword: 
regression analysismultiplicative noiseprediction of response probabilityacoustic environment
 Summary | Full Text:PDF(272.5KB)

Establishment of Nonlinear ARMA Model for Non-Gaussian Stochastic Process and Its Application to Time Series Data of Road Traffic Noise
Akira IKUTA Mitsuo OHTA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1994/08/25
Vol. E77-A  No. 8  pp. 1345-1352
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: 
Keyword: 
nonlinear ARMA modelnon-Gaussian processtime series modelacoustic environment
 Summary | Full Text:PDF(556.4KB)

Stochastic Signal Processing for Incomplete Observations under the Amplitude Limitations in Indoor and Outdoor Sound Environments Based on Regression Analysis
Noboru NAKASAKO Mitsuo OHTA Hitoshi OGAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1994/08/25
Vol. E77-A  No. 8  pp. 1353-1362
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: 
Keyword: 
dynamic rangeBayes' theoremextended regression analysisjoint probability density functionoutput response probability distribution
 Summary | Full Text:PDF(805.9KB)

A Signal Information Processing for the Stochastic Response Prediction of Double-Wall Type Sound
Mitsuo OHTA Shigeharu MIYATA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1994/07/25
Vol. E77-A  No. 7  pp. 1194-1198
Type of Manuscript:  LETTER
Category: Acoustics
Keyword: 
acousticsdigital signal processingLinear and nonlinear filterstatistical energy analysis
 Summary | Full Text:PDF(329.7KB)

A Practical Trial of Dynamical State Estimation for Non-Gaussian Random Variable with Amplitude Limitation and Its Application to the Reverberation Time Measurement
Noboru NAKASAKO Mitsuo OHTA Yasuo MITANI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1993/09/25
Vol. E76-A  No. 9  pp. 1392-1402
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: 
Keyword: 
nonlinear saturation functionBayes' theoremdigital filternon-Gaussian distributionreverberation time measurement
 Summary | Full Text:PDF(830.5KB)

A Signal Processing for Generalized Regression Analysis with Less Information Loss Based on the Observed Data with an Amplitude Limitation
Mitsuo OHTA Akira IKUTA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1993/09/25
Vol. E76-A  No. 9  pp. 1485-1487
Type of Manuscript:  Special Section LETTER (Special Section on Information Theory and Its Applications)
Category: 
Keyword: 
Improved Regression AnalysisObservation with Amplitude LimitationPrediction of Response ProbabilitySound EnvironmentNonlinear Correlation
 Summary | Full Text:PDF(197.3KB)

A Signal Processing Method of Nonstationary Stochastic Response on a Power Scale for the Actual Sound Insulation Systems
Mitsuo OHTA Kiminobu NISHIMURA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1993/08/25
Vol. E76-A  No. 8  pp. 1293-1299
Type of Manuscript:  Special Section PAPER (Special Section of Papers Selected from the 7th Digital Signal Processing Symposium)
Category: Speech and Acoustic Signal Processing
Keyword: 
stochastic signal processingnonstationarynon-Gamma randon processsound insulation system
 Summary | Full Text:PDF(653.5KB)

Discrete Time Modeling and Digital Signal Processing for a Parameter Estimation of Room Acoustic Systems with Noisy Stochastic Input
Mitsuo OHTA Noboru NAKASAKO Kazutatsu HATAKEYAMA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1992/11/25
Vol. E75-A  No. 11  pp. 1460-1467
Type of Manuscript:  Special Section PAPER (Special Section on Acoustic System Modeling and Signal Processing)
Category: 
Keyword: 
input background noise polluting sound inputBayes' theoremdigital filterparameter estimationnon-Gaussian distributionnon-linear observation
 Summary | Full Text:PDF(610.5KB)

An Estimation Method of Probability Distribution for a Specific Stochastic Signal Contaminated by an Additional Noise Based on the Arbitrarily Quantized Level Observation
Mitsuo OHTA Akira IKUTA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1992/09/25
Vol. E75-A  No. 9  pp. 1046-1051
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: 
Keyword: 
estimation of probability functionquantized level observationstochastic signal processingnoise removalacoustic environment
 Summary | Full Text:PDF(445.6KB)

A Stochastic Signal Processing in the Traffic Noise Prediction Problem with the Nonstationarity of Headway Distribution
Mitsuo OHTA Kiminobu NISHIMURA Kazutatsu HATAKEYAMA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1992/08/25
Vol. E75-A  No. 8  pp. 996-1003
Type of Manuscript:  Special Section PAPER (Special Section on the 6th Digital Signal Processing Symposium)
Category: 
Keyword: 
nonstationary traffic flowprediction problemstatistical analysisenvironmental noise
 Summary | Full Text:PDF(635.7KB)

A State Estimation Method of Impulsive Signal Using Digital Filter under the Existence of External Noise and Its Application to Room Acoustics
Akira IKUTA Mitsuo OHTA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1992/08/25
Vol. E75-A  No. 8  pp. 988-995
Type of Manuscript:  Special Section PAPER (Special Section on the 6th Digital Signal Processing Symposium)
Category: 
Keyword: 
state estimationimpulsive signaldigital filterroom acoustic
 Summary | Full Text:PDF(514.2KB)

State Estimation Method Based on Digital Filter for Energy Stochastic System with Decibel Observation Mechanism
Eiji UCHINO Mitsuo OHTA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1991/11/25
Vol. E74-A  No. 11  pp. 3546-3553
Type of Manuscript:  Special Section PAPER (Special Issue on HAKONE Digital Signal Processing Symposium)
Category: 
Keyword: 
 Summary | Full Text:PDF(489.7KB)

An Evaluation Method for Energy Stochastic System with Nonstationary Random Input and a Prediction of Response Probability Distribution for the Acoustic Insulation Wall Excited by a Road Traffic Noise
Mitsuo OHTA Kiminobu NISHIMURA Kazutatsu HATAKEYAMA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1991/09/25
Vol. E74-A  No. 9  pp. 2547-2554
Type of Manuscript:  Special Section PAPER (Special Issue on Information Theory and Its Applications)
Category: 
Keyword: 
 Summary | Full Text:PDF(580.4KB)

A New Restoration Method for Medical X-Ray Images with Optical Blurs and Quantum Mottles
Mitsuo OHTA Akira IKUTA Yasuo MITANI Yoshie KODERA Masaaki OGAWA Minoru FUJITA Takuro WADA 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1990/05/25
Vol. E73-E  No. 5  pp. 670-678
Type of Manuscript:  Special Section PAPER (Special Issue on Information Theory and Its Applications)
Category: 
Keyword: 
 Summary | Full Text:PDF(1.2MB)

A Multivariate Probabilistic Evaluation on the Output Response of Linear System with Nonstationary Noise and Its Application to the Acoustic Insulation System
Kiminobu NISHIMURA Mitsuo OHTA Teruyuki FUKUDA 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1990/03/25
Vol. E73-E  No. 3  pp. 365-372
Type of Manuscript:  PAPER
Category: Environmental Acoustics, Noise and Vibration
Keyword: 
 Summary | Full Text:PDF(533.7KB)

Regression Analysis with Less Information Loss under the Existence of Background Noise
Mitsuo OHTA Bing CHANG Yegui XIAO 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1989/05/25
Vol. E72-E  No. 5  pp. 531-538
Type of Manuscript:  Special Section PAPER (Special Issue on Information Theory and Its Applications)
Category: 
Keyword: 
 Summary | Full Text:PDF(565.5KB)

A Stochastic Signal Processing of Analog and Digital Types for Acoustic Random Power State Variable and an Establishment of Digital Filter
Mitsuo OHTA Akira IKUTA Yasuo MITANI 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1989/05/25
Vol. E72-E  No. 5  pp. 521-530
Type of Manuscript:  Special Section PAPER (Special Issue on Information Theory and Its Applications)
Category: 
Keyword: 
 Summary | Full Text:PDF(639.3KB)

A Computer-Aided Identification Method of Arbitrary Stochastic System Contaminated by Modelling Errors and Background Noises
Mitsuo OHTA Kazutatsu HATAKEYAMA Kiminobu NISHIMURA 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1988/11/25
Vol. E71-E  No. 11  pp. 1098-1106
Type of Manuscript:  PAPER
Category: General and Electrical Acoustics
Keyword: 
 Summary | Full Text:PDF(758.8KB)

A Stochastic Signal Processing of Incomplete Observation Data with Amplitude Limitation and State Estimation under the Existence of Additional Noise
Mitsuo OHTA Akira IKUTA Naomitsu TAKAKI 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1988/01/25
Vol. E71-E  No. 1  pp. 8-15
Type of Manuscript:  PAPER
Category: Digital Signal Processing
Keyword: 
 Summary | Full Text:PDF(635.8KB)