KONDO Kazuhiro

J-GLOBAL         Last updated: Oct 5, 2019 at 02:41
 
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Name
KONDO Kazuhiro
E-mail
kkondoyz.yamagata-u.ac.jp
Affiliation
Yamagata University
Section
Graduate School of Science and Engineering Graduate School of Science and Engineering, Yamagata University
Job title
Professor
Degree
Doctor (Engineering)(Waseda University)

Research Areas

 
 

Academic & Professional Experience

 
Apr 1984
 - 
Aug 1992
Researcher, Central Research Laboratory, Hitachi Ltd.
 
Sep 1992
 - 
Jan 1995
Researcher, Texas Instruments Tsukuba Research and Development Center Ltd.
 
Apr 1999
 - 
Mar 2007
Associate Professor (as old post name), Faculty of Engineering Department of Electrical Engineering, Yamagata University
 
Apr 2007
 - 
Mar 2015
Associate Professor, Graduate School of Science and Engineering Graduate School of Science and Engineering, Yamagata University, Yamagata University
 
Apr 2015
 - 
Today
Professor, Graduate School of Science and Engineering Graduate School of Science and Engineering, Yamagata University, Yamagata University
 

Education

 
 
 - 
Mar 1982
Department of Electronics and Communication Engineering, Faculty of Science and Engineering, Waseda University
 
 
 - 
Mar 1984
Department of Electrical Engineering, Graduate School, Division of Science and Engineering, Waseda University
 

Committee Memberships

 
Apr 2007
 - 
Mar 2009
The Acoustical Society of Japan  Secretary of Finances
 
Feb 2008
 - 
Today
program committee member, International Conference on Intelligent Information Hiding and Multimedia Signal Processing
 
Apr 2009
 - 
Apr 2011
The Acoustical Society of Japan  Secretary of General Affairs
 
Nov 2010
 - 
Oct 2014
Invited session organizer, International Conference on Intelligent Information Hiding and Multimedia Signal Processing
 
Apr 2011
 - 
Today
The Institute of Electronics, Information and Communication Engineers  Information Hiding and its Criteria for Evaluation Technical Research Group Member
 

Awards & Honors

 
Dec 2016
Senior Member, The Institute of Electronics, Information and Communication Engineers
Winner: Kazuhiro Kondo
 

Published Papers

 
Single DSP 8 kbps Speech Codec
T. Miyamoto, K. Kondo, T. Suzuki, Y. Asakawa and A. Ichikawa
Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing      Apr 1986   [Refereed]
Variable Rate Embedded ADPCM Coding Scheme for Packet Speech on ATM Networks
Kazuhiro Kondo, Masashi Ohno
Proceedings of the IEEE Global Telecommunication Conference   523-527   Dec 1990   [Refereed]
A Video Coding Scheme for HDTV Digital VCRs(jointly worked)
近藤 和弘
Proceedings of the International Workshop on HDTV   59-66   Apr 1992
Packet Speech Transmission on ATM Networks Using a Variable Rate Embedded ADPCM Coding Scheme
Kazuhiro Kondo, Masashi Ohno
IEICE Transactions on Communication   E76-B(4) 420-430   Apr 1993   [Refereed]
Cross-Language Acoustic Model Adaptation: From English Phones to Japanese Digit Recognition
Barbara Wheatley, Kazuhiro Kondo、Wallace Anderson
Proceedings of the Workshop on Automatic Speech Recognition   72-73   Dec 1993   [Refereed]
Packet Speech Transmission on ATM Networks Using a Variable Rate Embedded ADPCM Coding Scheme
Kazuhiro Kondo, Masashi Ohno
IEEE Transactions on Communication   42(2/3/4) 243-247   Feb 1994   [Refereed]
A Comparative Analysis of Japanese and English Digit Recognition
Kazuhiro Kondo, Joseph Picone, Barbara Wheatley
Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing   101-104   Apr 1994   [Refereed]
An Evaluation of Cross-Language Adaptation for Rapid HMM Development in a New Language
Barbara Wheatley, Kazuhiro Kondo、Wallace Anderson, Yeshwant Muthusamy
Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing   237-240   Apr 1994   [Refereed]
On Inter-phrase Context Dependencies in Continuously Read Japanese Speech
Kazuhiro Kondo, Yu-Hung Kao, Barbara Wheatley
Proceedings of the Internatinal Conference on Spoken Language Processing      Sep 1994   [Refereed]
Clustered Inter-phrase or Word Context-Dependent Models for Continuously Read Japanese
近藤 和弘,近藤 和弘、Yu-Hung Kao, Barbara Wheatley
Journal of Acoustic Society of Japan (E), 16 (5)      Sep 1995
Connected Digit Recognition with Pitch Accent Dependent Models
近藤 和弘
Proc. ESCA Eurospeech      Sep 1995
Surfin’ the World Wide Web with Japanese
近藤 和弘,Kazuhiro Kondo, Charles Hemphill
Proc. IEEE ICASSP      Apr 1997
音声認識を用いたWWWブラウザとその評価
近藤 和弘,近藤 和弘、Charles Hemphill
電子情報通信学会論文誌 J-81-D-Ⅱ(2)      Feb 1998
A WWW Browser Using Speech Recognition and its Evaluation
Kazuhiro Kondo, Charles Hemphill
Systems and Computers in Japan   29(10) 57-67   Sep 1998   [Refereed]
Kanji to Hiragana Conversion Based on a Length-Constrained N-Gram Analysis
近藤 和弘,J. Picone, T. Staples, 近藤 和弘、新井 希
IEEE Transactions on Speech and Audio Processing 7(6)      Nov 1999
Characteristics of Fiber-Optic SSB Modulation using Optical Hilbert Transformer
Kikuji Tanaka, Katsumi Takano, Kazuhiro Kondo, Kiyoshi Nakagawa
Proceedings of the Optoelectronics and Communications Conference   600-601   Jul 2001   [Refereed]
Eye-opening Characteristics of Optical SSB Modulation using Hilbert Transformer
Kikuji Tanaka, Katsumi Takano, Kazuhiro Kondo, Kiyoshi Nakagawa
Proceedings of the Pacific Rim Conference on Laser and Electro-Optics   II554-II555   Jul 2001   [Refereed]
Towards a Robust Speech Intelligibility Test in Japanese
近藤 和弘,Kazuhiro Kondo, Ryo Izumi, Kiyoshi Nakagawa
Proc. International Congress on Acoustics      Sep 2001
All-Optical Hilbert Transformer Implementation for Fiber-Optic Single Sideband Modulator
Kikuji Tanaka, Katsumi Takano, Kazuhiro Kondo, Kiyoshi Nakagawa
Proceedings of the Internatinal Symposium on Contemporary Photonics Technology      Jan 2002   [Refereed]
Improved sideband suppression of optical SSB modulation using all-optical Hilbert transformer
近藤 和弘,田中 喜久治、高野勝美、近藤 和弘、中川 清司
Electronics Letters      Jan 2002
電気段低域減衰等化器を適用した有限次数ヒルベルト変換型光SSB変調波長多重系のアイ開口解析
近藤 和弘,田中 喜久治、高野勝美、近藤 和弘、中川 清司
電子情報通信学会論文誌 J-85-B      Feb 2002
光信号処理型ヒルベルト変換器を適用した光SSB変調波長多重系のアイ開口解析
近藤 和弘,田中 喜久治、高野勝美、近藤 和弘、中川 清司
電子情報通信学会論文誌J-85-B      Aug 2002
Active Speech Cancellation for Cellular Speech
近藤 和弘,Kazuhiro Kondo, Kiyoshi Nakagawa
Proc. International Conference on Spoken Language Processing      Sep 2002
On Long Term Prediction for Active Cellular Speech Control
近藤 和弘,Kazuhiro Kondo, Kiyoshi Nakagawa
Proc. Internoise 2003      Aug 2003
Self-restoration properties of VWP networks by spare wavelength optimization
Yu Sasaki, Kiyoshi Nakagawa, Katsumi Takano, Kazuhiro Kondo
Proceedings of the Optoelectronics and Communications Conference   550-551   Oct 2003   [Refereed]
A Data Hiding Method Using Linear Prediction
Shingo Takehana, Kazuhiro Kondo and Kiyoshi Nakagawa
Proc. International Congress on Acoustics      Apr 2004
A Packet Loss Concealment Method Using Recursive Linear Prediction
Kazuhiro Kondo and Kiyoshi Nakagawa
Proc. Interspeech-ICSLP      Oct 2004   [Refereed]
Experimental Evaluation of an Active Speech Control Method
近藤 和弘,Kazuhiro Kondo and Kiyoshi Nakagawa
Proc. IEEE ICASSP      Mar 2005
Power Distribution of Optical Comb Generated by Fiber Ring with AO Frequency Shifters
近藤 和弘
Proceedings of the 10th Optoelectronics and Communications Conference   6D4-3 254-255   Apr 2005
A Speech Packet Loss Concealment Method Using Linear Prediction
Kazuhiro Kondo, Kiyoshi Nakagawa
IEICE Transactions of the Information and Systems   E89-D(2) 806-813   Feb 2006   [Refereed]
On quality improvement of degraded MPEG audio due to packet loss using highly compressed overhead data
T. Niizeki, K. Kondo, K. Takano, K. Nakagawa
Proceedings of the International Symposium on Frontiers in Speech and Hearing Research      Mar 2006   [Refereed]
On a revised word-pair list for the Japanese intelligibility test
M. Fujimori, K. Kondo, K. Takano, K. Nakagawa
Proceedings of the International Symposium on Frontiers in Speech and Hearing Research      Mar 2006   [Refereed]
Towards a Remote Conference System Using 3-D Audio for Intelligible Speech Collaboration
Yuichiro Kitashima, Hirotoshi Terada, Kazuhiro Kondo, Kiyoshi Nakagawa
Proc. IPSJ Multimedia, Distributed, Cooperative and Mobile Symposium (DICOMO)   2006(6) 41-44   Jul 2006   [Refereed]
On Equalization of Bone Conducted Speech for Improved Speech Quality
K. Kondo, T. Fujita, and Kiyoshi Nakagawa
IEEE International Symposium on Signal Processing and Information Technology (ISSPIT)      Aug 2006   [Refereed]
On the accuracy of speech source direction identification on the horizontal plane using 3-D audio displays
H. Terada, K. Kondo, and K. Nakagawa
Proc. 4th Joint Meeting of the Acoustical Society of America and the Acoustical Society of Japan      Nov 2006   [Refereed]
Towards estimation of Japanese intelligibility scores using objective voice quality assessment measures
Rui Kaga, Kazuhiro Kondo, Kiyoshi Nakagawa, and Masaya Fujimori
Proc. 4th Joint Meeting of the Acoustical Society of America and the Acoustical Society of Japan      Dec 2006   [Refereed]
A speech communication environment using open source software library for active sound image control
Yuichiro Kitashima, Kazuhiro Kondo and Kiyoshi Nakagawa
Proc. 4th Joint Meeting of the Acoustical Society of America and the Acoustical Society of Japan      Dec 2006   [Refereed]
On an active vibration control system of impulsive bang noise for floor units
Masato Anzai, Kazuhiro Kondo, Kiyoshi Nakagawa, Hideharu Isaka, and Katsuyoshi Suzuki
Proc. 35th International Congress and Exposition on Noise Control Engineering (Internoise 2006)      Dec 2006   [Refereed]
Two-to-one selection-based Japanese speech intelligibility test
Kazuhiro Kondo, Ryo Izumi, Masaya Fujimori, Rui Kaga, Kiyoshi Nakagawa
Journal of the Acoustical Society of Japan   63(4) 196-205   Apr 2007   [Refereed]
Speech Emission Control Using Active Cancellation
Kazuhiro Kondo, Kiyoshi Nakagawa
Speech Communication   49(9) 687-696   Sep 2007   [Refereed]
Intelligibility of read Japanese words with competing noise in virtual acoustic space (jointly worked)
Yuichiro Kitashima, Kazuhiro Kondo, Hirotoshi Terada, Takahito Chiba, Kiyoshi Nakagawa
Acoustical Science and Technology   29(1) 74-81   Jan 2008   [Refereed]
A Digital Watermark for Stereo Audio Signals Using Variable Inter-channel Delay in High-Frequency Bands (Jointly worked)
Kazuhiro Kondo, Kiyoshi Nakagawa
Proc. IEEE International Conference on Intelligent Information Hiding and Multimedia Signal Processing   624-627   Aug 2008   [Refereed][Invited]
On the Accuracy of Estimated Synchronization Position for Audio Digital Watermarks Using the Modified Patchwork Algorithm on Analog Channels (jointly worked)
Kodai Hiratsuka, Kazuhiro Kondo, Kiyoshi Nakagawa
Proc. IEEE International Conference on Intelligent Information Hiding and Multimedia Signal Processing   628-631   Aug 2008   [Refereed][Invited]
On the Influence of Localized Position of Interference Noise on the Intelligibility of Read Japanese Words in Remote Conference Systems (jointly worked)
Takahito Chiba, Yuichiro Kitashima, Noriyasu Yano, Kazuhiro Kondo, Kiyoshi Nakagawa
Proc. 37th International Congress and Exhibition on Noise Control Engineering      Oct 2008   [Refereed]
Comparison of Audio Packet Loss Concealment Methods using LPC Interpolation on the Time-Frequency MDCT Frame (jointly worked)
Yuuki Akiba, Kazuhiro Kondo, Katsumi Takano, Kiyoshi Nakagawa
Proc. 37th International Congress and Exhibition on Noise Control Engineering      Oct 2008   [Refereed]
On Articulation of Automobile Navigation Speech using Piezoelectric Speakers (jointly worked)
Masanori Miura, Kazuhiro Kondo, Hideharu Isaka
Proc. 37th International Congress and Exhibition on Noise Control Engineering      Oct 2008   [Refereed]
Simple Watermark for Stereo Audio Signals with Modulated High-Frequency Band Delay (jointly worked)
Kazuhiro Kondo, Kiyoshi Nakagawa
Acoustical Science and Technology   29(6) 384-387   Nov 2008   [Refereed]
Intelligibility of Low Bit Rate MPEG-coded Japanese Speech in Virtual 3-D Audio Space (jointly worked)
Yousuke Kobayashi, Kazuhiro Kondo, Kiyoshi Nakagawa
Proc. of the 15th International Conference on Auditory Display      May 2009   [Refereed]
On Estimation of Two-to-one Selection-based Intelligibility Score Using Speech Recognition (jointly worked)
Yusuke Takano, Kazuhiro Kondo
Proc. of the IEEE 13th International Symposium on Consumer Electronics      May 2009   [Refereed]
Towards reliable articulation evaluation inside automobiles using binaural mannequins (jointly worked)
Masanori Miura, Yuki Fukazawa, Kazuhiro Kondo, Hideharu Isaka
Proc. 38th International Congress and Exhibition on Noise Control Engineering      Aug 2009   [Refereed]
A Data Hiding Method for Stereo Audio Signals Using the Polarity of the Inter-Channel Decorrelator
Kazuhiro Kondo
Proc. IEEE International Conference on Intelligent Information Hiding and Multimedia Signal Processing      Sep 2009   [Refereed][Invited]
Comparison of localized speech intelligibility with competing noise using regular and bone-conduction stereo headphones
Takayuki Kanda, Hiroyuki Yagyu, Yousuke Kobayashi, Kazuhiro Kondo and Kiyoshi Nakagawa
Proc. of the International Workshop on the Principles and Applications of Spatial Hearing      Nov 2009   [Refereed]
Influence of Various Stereo Coding Modes on Encoded Japanese Speech Intellitgibility with Competing Noise
Yousuke Kobayashi, Kazuhiro Kondo, Kiyoshi Nakagawa
Proc. of the International Workshop on the Principles and Applications of Spatial Hearing      Nov 2009   [Refereed]
A Digital Watermark for Stereo Audio Signals Using Variable Inter-Channel Delay in High-Frequency Bands and its Evaluation (jointly worked)
Kazuhiro Kondo, Kiyashi Nakagawa
International Journal of Innovative Computing, Information and Control   6(3(B)) 1209-1220   Mar 2010   [Refereed][Invited]
Evaluation of a Stereo Audio Data Hiding Method Using Inter-Channel Decorrelator Polarity
Kazuhiro Kondo
Proc. IEEE International Conference on Acoustics, Speech and Signal Processing   277-280   Mar 2010   [Refereed]
Intelligibility comparison of Japanese speech with competing noise spatialized in real and virtual acoustic environments (jointly worked)
Kazuhiro Kondo, Takahito Chiba, Yuichiro Kitashima and Noriyasu Yano
Acoustical Science and Technology   31(3) 231-238   May 2010   [Refereed]
Estimation of Two-to-One Forced Selection Intelligibility Scores by Speech Recognizers Using Noise-Adapted Models
Kazuhiro Kondo, Yusuke Takano
Proceedings of the 11th Annual Conference of the International Speech Communication Association (Interspeech 2010)   302-305   Sep 2010   [Refereed]
Speech Intelligibility of Diagonally Localized Speech with Competing Noise Using Bone-Conduction Headphones
Kazuhiro Kondo, Takayuki Kanda, Yosuke Kobayashi, Hiroyuki Yagyu
Proceedings of the 11th Annual Conference of the International Speech Communication Association (Interspeech 2010)   1213-1216   Sep 2010   [Refereed]
On the Influence of Coding Method on Japanese Speech Intelligibility in Virtual 3D Audio Space
Yosuke Kobayashi, Kazuhiro Kondo, Kiyoshi Nakagawa, Yukio Iwaya
Proc. AES 40th International Conf. on Spatial Audio      Oct 2010   [Refereed]
Estimation of Speech Intelligibility Using Speech Recognition Systems
Yusuke Takano, Kazuhiro Kondo
IEICE Transactions of the Information and Systems   E93-D(12) 3368-3376   Dec 2010   [Refereed]
A Data Hiding Method for Stereo Audio Signals Using Inter-Channel Decorrelator Polarity
Kazuhiro Kondo
Journal of the Audio Engineering Society   59(6) 379-395   Jun 2011   [Refereed]
Differences in the effect of speech rate on intelligibility in artificially speed-altered speech by phonetic feature
Toru Shibuya, Yosuke Kobayashi, Kazuhiro Kondo
Proc. 40th International Congress and Exhibition on Noise Control Engineering      Sep 2011   [Refereed]
On distortion measures effective for the estimation of Japanese speech intelligibility of localized speech with competing noise in virtual acoustic space
Yosuke Kobayashi, Kazuhiro Kondo
Proc. 40th International Congress and Exhibition on Noise Control Engineering      Sep 2011   [Refereed]
Improving accuracy of estimated speech intelligibility scores by speech recognizers using multi-condition noise-adpated models
Kazuhiro Kondo
Proc. 40th International Congress and Exhibition on Noise Control Engineering      Sep 2011   [Refereed]
Optimum orientation of parallel parametric speakers for simultaneous guide audio with minium cross-talk
Kazuhiro Kondo
Proc. 40th International Congress and Exhibition on Noise Control Engineering      Sep 2011   [Refereed]
Estimation of speech intelligibility using objective measures
Kazuhiro Kondo
Proc. 40th International Congress and Exhibition on Noise Control Engineering      Sep 2011   [Refereed]
Evaluation of localized speech intelligibility from bone-conduction headphones with competing noise for augmented audio reality
Naoya Anazawa, Yosuke Kobayshi, Hiroyuki Yagyu, Takayuki Kanda and Kazuhiro Kondo
Proc. 40th International Congress and Exhibition on Noise Control Engineering      Sep 2011   [Refereed]
An efficient speech privacy system using speaker-dependent babble noise as maskers
Tomohiro Komiyama, Kazuhiro Kondo
Proc. 40th International Congress and Exhibition on Noise Control Engineering      Sep 2011   [Refereed]
Sound presentation of audio reality systems in environment with wind noise
Masanori Miura, Kazuhiro Kondo, Hideharu Isaka
Proc. 40th International Congress and Exhibition on Noise Control Engineering      Sep 2011   [Refereed]
The Effect of Speaker and Noise Type on the Accuracy of Estimated Speech Intelligibility Using Objective Measures
Kazuhiro Kondo
Proc. the Seventh IEEE International Conference on Intelligent Information Hiding and Multimedia Signal Processing      Oct 2011   [Refereed]
DIFFERENCES IN THE EFFECT OF TIME-EXPANDED AND TIME-CONTRACTED SPEECH ON INTELLIGIBILITY BY PHONETIC FEATURE
Toru Shibuya, Yosuke Kobayashi, Hitomi Watanabe, Kazuhiro Kondo
Proc. IEEE International Conference on Acoustics, Speech and Signal Processing      Mar 2012   [Refereed]
Kazuhiro Kondo
Applied Acoustics   74(1) 63-70   Jul 2012   [Refereed]
In this paper, a method to estimate the subjective speech intelligibility scores of the Japanese DRT speech intelligibility test using some objective measures is proposed and evaluated. The objective measures tested were MOS calculated using the P...
On the Use of Objective Quality Measures to Estimate Watermarked Audio Quality
Kazuhiro Kondo
Proc. IEEE International Conference on Intelligent Information Hiding and Multimedia Signal Processing      Jul 2012   [Refereed]
A Watermarking Method for Embedding Short Information Split into Audio and Video Signals
Yoshimi Yamaguchi, Toshio Koga, Kazuhiro Kondo
Proc. IEEE International Conference on Intelligent Information Hiding and Multimedia Signal Processing      Jul 2012   [Refereed]
Speech intelligibility of guide audio with parametric loud speakers
Kazuhiro Kondo, Tomohiro Terada, Futari Kano
Noise Control Engineering Journal   60(5) 548-558   Sep 2012   [Refereed]
Difference in the Effect of Time-Expanded and Time-Contracted Speech on Intelligibility by Phonetic Feature and Adaptive Rate Control Strategy
Toru Shibuya, Hitomi Watanabe, Yosuke Kobayashi, Kazuhiro Kondo
The Institute of Image Information and Television Engineers Journal   66(10)    Oct 2012   [Refereed]
Performance evaluation of an ambient noise clustering method for objective speech intelligibility estimate
133(2)    Feb 2013   [Refereed]
Objective evaluation of sound quality for attacks on robust audio watermarking
Akira Nishimura, Masashi Unoki, Kazuhiro Kondo, Akio Ogihara
Proceedings of the 21st International Congress on Acoustics      Jun 2013   [Refereed]
Speech intelligibility estimation using support vector regression and critical band segmental SNR in noisy condition
133(8) 1556-1564   Aug 2013   [Refereed]
A Comparison of the Noise Control Earphone and the Bone Conduction Headphone in Outdoor Audio Augmented Reality for Pedestrian and Cyclists
Masanori MIURA, Hideto WATANABE, Kou KAWAI, Kazuhiro KONDO
Transactions of the JSME Ser. C      Oct 2013   [Refereed]
Towards Estimation of Quality of Watermarked Audio Signal using Objective Measures
Kazuhiro Kondo
Proc. IEEE International Conference on Intelligent Information Hiding and Multimedia Signal Processing      Oct 2013   [Refereed]
Towards Gender-Dependent Babble Maskers for Speech Privacy Protection
Kazuhiro Kondo, Tomohiro Komiyama, Shintaro Kashiwada
Proc. IEEE International Conference on Intelligent Information Hiding and Multimedia Signal Processing      Oct 2013   [Refereed]
Characteristics Comparison of Two Audio Output Devices for Augmented Audio Reality
Kazuhiro Kondo, Naoya Anazawa, Yosuke Kobayashi
Proc. Asia Pacific Signal and Information Processing Association Annual Summit and Conference      Oct 2013   [Refereed]
Intelligibility Comparison of Speech Annotation under Wind Noise in AAR Systems for Pedestrians and Bicyclists using Two Output Devices
Masanori Miura, Hideto Watanabe, Koh Kawai, Kazuhiro Kondo
Proc. Asia Pacific Signal and Information Processing Association Annual Summit and Conference      Oct 2013   [Refereed]
Yosuke Kobayashi, Kazuhiro Kondo
Electronics and Communications in Japan   97(5) 43-52   May 2014
We investigated the clustering of nonstationary noise used in the subjective and objective assessment of speech intelligibility. The feature vector used in the clustering comprises 15-dimensional features used typically in MIR, and clustering was ...
Kazuhiro Kondo, Naoya Anazawa, Yosuke Kobayashi
IEICE Transactions of the Information and Systems   E97-D(8) 2114-2123   Aug 2014   [Refereed]
We compared two audio output devices for augmented audio reality applications. In these applications, we plan to use speech annotations on top of the actual ambient environment. Thus, it becomes essential that these audio output devices are able t...
Kazuhiro Kondo, Hiroki Sakurai
Proc. IEEE International Conference on Intelligent Information Hiding and Multimedia Signal Processing   251-254   Aug 2014   [Refereed]
We investigated on an efficient masker for speech privacy protection. Previously, we proposed a speaker-dependent (SD) masker created from speech of the masked speaker. This masker decreased the speech intelligibility to a much lower level than co...
Single-Ended Estimation of Speech Intelligibility using the ITU P.563 Feature Set
Toshihiro Sakano, Yosuke Kobayashi, Kazuhiro Kondo
Proc. ISCA Interspeech      Sep 2014   [Refereed]
We investigated a single-ended speech intelligibility estimation method that does not require clean speech reference signal, using the features defined in the ITU-T standard P.563. We selected two sets of features from the P.563 features; the basi...
Kazuhiro Kondo, Yoshimi Yamaguchi, Toshio Koga
Multimedia Technology   3 23-28   Sep 2014
We investigated the feasibility of a parallel watermarking method for audio and video signals for multimedia streams with editing and/or switching capability. Since editing and switching are commonly done in short intervals, these watermarks need ...
Application of ANC for Singing Voice Attenuation
Daiki Suzuki, Kazuhiro Kondo
Proc. IEEE Global Conference on Consumer Electronics   63-64   Oct 2014   [Refereed]
In this paper, we propose an "ANC mute microphone" to attenuate noise caused by singing voice. To verify that an ordinary Filtered-X LMS Algorithm is valid to singing voice, we conducted simulations and experimented using the DSP kit DSK6713. The ...
Towards a Parametric Speaker System with Human Head Tracking Beam Control
Shun Kashiwase, Kazuhiro Kondo
Proc. IEEE Global Conference on Consumer Electronics   22-23   Oct 2014   [Refereed]
In this paper, we describe a prototype human head tracking parametric speaker system that can present speech in a highly directional beam. This system is composed of the Kobuki robot platform, the Kinect sensor, a USB-controlled camera pod and a p...
Comparison of Two Classification Methods for Musical Instrument Identification
Yuta Takahashi, Kazuhiro Kondo
Proc. IEEE Global Conference on Consumer Electronics   67-68   Oct 2014   [Refereed]
In this paper, we compared the Linear Discriminant Analysis (LDA) with Random Forest (RF) for musical instrument identification from clips with a mixture of instruments. As the first step, monotone samples from the Musical Instrument Samples (Univ...
A Voice Picking System Using Localized Navigation Speech and Head Tracking
Kazuhiro Kondo, Yasuhiro Abe
Proc. IEEE Global Conference on Consumer Electronics   525-528   Oct 2014   [Refereed]
We propose a voice picking system that uses localized guide speech oriented towards the target object, and Head Tracking (HT), which maintains the localized speech position according to the user's head movement. We verified the usability improveme...
Kazuhiro Kondo, Hiroki Sakurai, Shintaro Kashiwada, Tomohiro Komiyama
Noise Control Engineering Journal   62(6) 411-421   Nov 2014   [Refereed]
We investigated on an efficient masker for speech privacy protection. We first proposed a speaker-dependent (SD) masker created from speech spoken by the speaker to be masked (maskee). This masker decreased the speech intelligibility to a much low...
Bootstrap masker generation method for speech masking systems
Yosuke Kobayashi, Kazuhiro Kondo
Proc. 43rd International Congress and Exhibition on Noise Control Engineering      Nov 2014   [Refereed]
Recent masking systems make use of pre-recorded speech signals to generate a masker, which we will call offline generated maskers (OffLGM). The OffLGM does not take into account the speaker characteristics, and shows only modest efficiency. Previo...
Estimation of Japanese DRT Intelligibility Using Articulation Index Band Correlations
Kazuhiro Kondo
Proc. Asia Pacific Signal and Information Processing Association Annual Summit and Conference      Dec 2014   [Refereed]
We proposed and evaluated an estimation method for the forced selection Japanese Diagnostic Rhyme Test (DRT). The proposed measure takes into account the forced selection manner of the DRT from a pair of rhyming words. The objective distance measu...
On Audio Quality Evaluation Methods Applicable to Watermarked Audio Signals
Kazuhiro Kondo
Journal of the Acoustical Society of Japan   71(1) 42-48   Jan 2015   [Refereed][Invited]
In this paper, we first describe both subjective and objective audio quality evaluation methods. Then, we describe the subjective and objective quality evaluation results for several popular watermark embedded audio signals. Finally, initial resu...
A speech intelligibility estimation method using a non-reference feature set
Toshihiro Sakano, Yosuke Kobayashi, Kazuhiro Kondo
IEICE Transactions of the Information and Systems   E98-D(1) 21-28   Jan 2015   [Refereed]
We proposed and evaluated a speech intelligibility estimation
method that does not require a clean speech reference signal. The propose
method uses the features defined in the ITU-T standard P.563, which
estimates the overall quality of speech wit...
An Ambient Noise Clustering Method for Japanese Speech Intelligibility Estimation
Yosuke Kobayashi, Kazuhiro Kondo
Proc. 44th International Congress and Exhibition on Noise Control Engineering      Aug 2015   [Refereed]
We investigated the clustering of non-stationary noise to be used in the objective assessment of speech intelligibility. Previously, we used one regression function to map objective measures to subjective quality for all noise types under test. In...
Comparison of Synchronization Methods for Robust Audio Watermarks
Joji Yamada, Kazuhiro Kondo
Proc. IEEE Global Conference on Consumer Electronics      Oct 2015   [Refereed]
In this paper, we compared a number of frame synchronization methods for audio watermarks. M-sequence was embedded into the phase of the host signal for synchronization. We compared the detection accuracy of the Cross-power Spectrum Phase Analysis...

Books etc

 
Signal Processing of HDTV IV
K. Kondo, H. Gunji, Y. Eto, A. Gonda, K. Naka and H. Owashi (Part:Joint Work, A Video Coding Scheme for HDTV Digital VCRs)
Elsevier Science Ltd.   Nov 1993   ISBN:0444815511
"Auditory Display," Lecture Notes in Computer Science 5954
Yosuke Kobayashi, Kazuhiro Kondo, Kiyoshi Nakagawa (Part:Joint Work, Intelligibility of HE-AAC Coded Japanese Words with Various Stereo Coding Modes in Virtual 3D Audio Space)
Springer-Verlag   May 2010   
Keiichi Satoh, Jubee Tada, Yasutaka Tamura, Gensuke Goto, Toshio Koga, Kazuhiro Kondo (Part:Joint Work)
Sciyo   Aug 2010   ISBN:9789533070988
Kazuhiro Kondo (Part:Joint Work, 第8章)
InTech   Jun 2011   ISBN:9789533073224
Kazuhiro Kondo
Springer-Verlag   Mar 2012   ISBN:978-3-642-275
It is becoming crucial to accurately estimate and monitor speech quality in various ambient environments to guarantee high quality speech communication. This practical hands-on book shows speech intelligibility measurement methods so that the read...

Conference Activities & Talks

 
Recent advances in the estimation of speech intelligibility using objective measures [Invited]
Kazuhiro Kondo
RIEC International Symposium on Ultra-Realistic Interactive Acoustic Communications   20 May 2016   A3 Foresight Program "Ultra-Realistic Acoustic Interactive Communication on Next-Generation Internet"
Since mobile phones have become predominant for speech communication, conversation is conducted with a wide variety of ambient noise and distortions. Thus, constant quality monitoring to guarantee satisfactory quality is necessary. For speech comm...

Research Grants & Projects

 
Towards a real-time speech intelligibility meter
Japan Society for the Promotion of Science: Grants-in-Aid for Scientific Research
Project Year: Apr 2017 - Mar 2020    Investigator(s): Kazuhiro Kondo

Patents

 
特公平7-58959 : Frame Synchronization Detection Apparatus
Yuu Mitomo, Sumie Nakabayashi, Ryujiro Muramatsu, Takanori Miyamoto, Kazuhiro Kondo, Toshiro Suzuki
特公平7-118749 : Voice and Data Multiplexer System
Kazuhiro Kondo, Toshiro Suzuki, Takanori Miyamoto
特公平7-123235 : Echo Suppressor
Takanori Miyamoto, Sumie Nakabayashi, Toshiro Suzuki, Kazuhiro Kondo, Shinichi Niina
2914974 : Method and System for Transmitting Variable Rate Speech Signal
Kazuhiro Kondo, Toshiro Suzuki
特公平7-48695 : Speech Coding System Using Variable Threshold Values for Noise Reduction
Ryujiro Muramatsu, Takanori Miyamoto, Kazuhiro Kondo, Toshiro Suzuki