IEICE Trans

Keyword : microphone array

Integration of Spatial Cue-Based Noise Reduction and Speech Model-Based Source Restoration for Real Time Speech Enhancement Tomoko KAWASE Kenta NIWA Masakiyo FUJIMOTO Kazunori KOBAYASHI Shoko ARAKI Tomohiro NAKATANI
Publication: Publication Date: 2017/05/01 Vol. E100-A No. 5 ; pp. 1127-1136 Type of Manuscript: PAPER Category: Digital Signal Processing Keyword: microphone array, beamforming (BF), power spectral density (PSD) estimation, Gaussian mixture model, Wiener filtering,
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An Extension of MUSIC Exploiting Higher-Order Moments via Nonlinear Mapping Yuya SUGIMOTO Shigeki MIYABE Takeshi YAMADA Shoji MAKINO Biing-Hwang JUANG
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2016/06/01 Vol. E99-A No. 6 ; pp. 1152-1162 Type of Manuscript: PAPER Category: Engineering Acoustics Keyword: underdetermined DOA estimation, microphone array, MUSIC, 2q-MUSIC, higher-order statistics,
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Integration of Multiple Microphone Arrays and Use of Sound Reflections for 3D Localization of Sound Sources Carlos T. ISHI Jani EVEN Norihiro HAGITA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2014/09/01 Vol. E97-A No. 9 ; pp. 1867-1874 Type of Manuscript: Special Section PAPER (Special Section on Spatial Acoustic Signal Processing and Applications) Category: Keyword: sound localization, sound reflection, microphone array, 3D localization,
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Sound Source Orientation Estimation Based on an Orientation-Extended Beamformer Hirofumi NAKAJIMA Keiko KIKUCHI Kazuhiro NAKADAI Yutaka KANEDA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2014/09/01 Vol. E97-A No. 9 ; pp. 1875-1883 Type of Manuscript: Special Section PAPER (Special Section on Spatial Acoustic Signal Processing and Applications) Category: Keyword: sound source, orientation estimation, beamforming, microphone array,
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Multichannel Two-Stage Beamforming with Unconstrained Beamformer and Distortion Reduction Masahito TOGAMI Yohei KAWAGUCHI Yasunari OBUCHI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2013/04/01 Vol. E96-A No. 4 ; pp. 749-761 Type of Manuscript: PAPER Category: Engineering Acoustics Keyword: beamforming, multichannel noise reduction, reverberant environment, microphone array,
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Two-Microphone Noise Reduction Using Spatial Information-Based Spectral Amplitude Estimation Kai LI Yanmeng GUO Qiang FU Junfeng LI Yonghong YAN
Publication: IEICE TRANSACTIONS on Information and Systems Publication Date: 2012/05/01 Vol. E95-D No. 5 ; pp. 1454-1464 Type of Manuscript: PAPER Category: Speech and Hearing Keyword: microphone array, phase difference, magnitude squared coherence, spectral amplitude estimator,
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Improving Power Spectra Estimation in 2-Dimensional Areas Using Number of Active Sound Sources Yusuke HIOKA Ken'ichi FURUYA Yoichi HANEDA Akitoshi KATAOKA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2011/01/01 Vol. E94-A No. 1 ; pp. 273-281 Type of Manuscript: PAPER Category: Engineering Acoustics Keyword: microphone array, power spectrum estimation, speech enhancement, 2-dimensional area, estimating source position,
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Probabilistic Adaptation Mode Control Algorithm for GSC-Based Noise Reduction Seungho HAN Jungpyo HONG Sangbae JEONG Minsoo HAHN
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2010/03/01 Vol. E93-A No. 3 ; pp. 627-630 Type of Manuscript: LETTER Category: Speech and Hearing Keyword: speech enhancement, microphone array, beamforming,
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A Single-Chip Speech Dialogue Module and Its Evaluation on a Personal Robot, PaPeRo-Mini Miki SATO Toru IWASAWA Akihiko SUGIYAMA Toshihiro NISHIZAWA Yosuke TAKANO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2010/01/01 Vol. E93-A No. 1 ; pp. 261-271 Type of Manuscript: PAPER Category: Digital Signal Processing Keyword: speech recognition, DOA estimation, noise cancellation, microphone array, echo cancellation, speech dialogue module,
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Multi-Input Feature Combination in the Cepstral Domain for Practical Speech Recognition Systems Yasunari OBUCHI Nobuo HATAOKA
Publication: IEICE TRANSACTIONS on Information and Systems Publication Date: 2009/04/01 Vol. E92-D No. 4 ; pp. 662-670 Type of Manuscript: PAPER Category: Speech and Hearing Keyword: robust speech recognition, microphone array, MFCC, feature combination, HMM,
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A Robust Sound Source Localization Approach for Microphone Array with Model Errors Hua XIAO Huai-Zong SHAO Qi-Cong PENG
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2008/08/01 Vol. E91-A No. 8 ; pp. 2062-2067 Type of Manuscript: PAPER Category: Speech and Hearing Keyword: microphone array, robust sound source localization, model errors,
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Enhancement of Sound Sources Located within a Particular Area Using a Pair of Small Microphone Arrays Yusuke HIOKA Kazunori KOBAYASHI Ken'ichi FURUYA Akitoshi KATAOKA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2008/02/01 Vol. E91-A No. 2 ; pp. 561-574 Type of Manuscript: PAPER Category: Engineering Acoustics Keyword: microphone array, noise suppression, spectrum emphasis, power spectrum estimation, non-negative least squares method,
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An Approach to Solve Local Minimum Problem in Sound Source and Microphone Localization Kazunori KOBAYASHI Ken'ichi FURUYA Yoichi HANEDA Akitoshi KATAOKA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2007/12/01 Vol. E90-A No. 12 ; pp. 2826-2834 Type of Manuscript: PAPER Category: Engineering Acoustics Keyword: microphone array, localization, local minimum, teleconference,
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Robust Talker Direction Estimation Based on Weighted CSP Analysis and Maximum Likelihood Estimation Yuki DENDA Takanobu NISHIURA Yoichi YAMASHITA
Publication: IEICE TRANSACTIONS on Information and Systems Publication Date: 2006/03/01 Vol. E89-D No. 3 ; pp. 1050-1057 Type of Manuscript: Special Section PAPER (Special Section on Statistical Modeling for Speech Processing) Category: Speech Enhancement Keyword: robust talker direction estimation, CSP analysis, CSP coefficient subtraction, ML estimation, microphone array,
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Robust Beamforming of Microphone Array Using H_∞ Adaptive Filtering Technique Jwu-Sheng HU Wei-Han LIU Chieh-Cheng CHENG
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2006/03/01 Vol. E89-A No. 3 ; pp. 708-715 Type of Manuscript: Special Section PAPER (Special Section on Multidimensional Signal Processing and Its Application) Category: Speech/Audio Processing Keyword: beamformer, speech enhancement, H_∞ filtering, calibration, microphone array,
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Frequency Domain Microphone Array Calibration and Beamforming for Automatic Speech Recognition Jwu-Sheng HU Chieh-Cheng CHENG
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2005/09/01 Vol. E88-A No. 9 ; pp. 2401-2411 Type of Manuscript: PAPER Category: Noise and Vibration Keyword: beamformer, microphone array, calibration, speech recognition, speech enhancement,
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Near-Field Sound-Source Localization Based on a Signed Binary Code Miki SATO Akihiko SUGIYAMA Osamu HOSHUYAMA Nobuyuki YAMASHITA Yoshihiro FUJITA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2005/08/01 Vol. E88-A No. 8 ; pp. 2078-2086 Type of Manuscript: Special Section PAPER (Special Section on Papers Selected from the 19th Symposium on Signal Processing) Category: Digital Signal Processing Keyword: source localization, DOA estimation, near-field, signal processor, microphone array, robot,
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Multiple Signal Classification by Aggregated Microphones Mitsuharu MATSUMOTO Shuji HASHIMOTO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2005/07/01 Vol. E88-A No. 7 ; pp. 1701-1707 Type of Manuscript: Special Section PAPER (Special Section on Multi-channel Acoustic Signal Processing) Category: Microphone Array Keyword: microphone array, sound localization, condenser microphone, sound directivity, multiple signal classification,
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Blind Source Separation of Convolutive Mixtures of Speech in Frequency Domain Shoji MAKINO Hiroshi SAWADA Ryo MUKAI Shoko ARAKI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2005/07/01 Vol. E88-A No. 7 ; pp. 1640-1655 Type of Manuscript: INVITED PAPER (Special Section on Multi-channel Acoustic Signal Processing) Category: Keyword: blind source separation, convolutive mixtures, independent component analysis, frequency-domain BSS, microphone array, adaptive beamformer,
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Interface for Barge-in Free Spoken Dialogue System Combining Adaptive Sound Field Control and Microphone Array Tatsunori ASAI Hiroshi SARUWATARI Kiyohiro SHIKANO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2005/06/01 Vol. E88-A No. 6 ; pp. 1613-1618 Type of Manuscript: LETTER Category: Speech and Hearing Keyword: spoken dialogue system, barge-in, adaptive sound field control, microphone array, speech recognition,
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Adaptive Microphone Array System with Two-Stage Adaptation Mode Controller Yang-Won JUNG Hong-Goo KANG Chungyong LEE Dae-Hee YOUN Changkyu CHOI Jaywoo KIM
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2005/04/01 Vol. E88-A No. 4 ; pp. 972-977 Type of Manuscript: PAPER Category: Digital Signal Processing Keyword: speech enhancement, microphone array, generalized sidelobe canceller, adaptation mode controller,
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Multistage SIMO-Model-Based Blind Source Separation Combining Frequency-Domain ICA and Time-Domain ICA Satoshi UKAI Tomoya TAKATANI Hiroshi SARUWATARI Kiyohiro SHIKANO Ryo MUKAI Hiroshi SAWADA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2005/03/01 Vol. E88-A No. 3 ; pp. 642-650 Type of Manuscript: Special Section PAPER (Special Section on Adaptive Signal Processing and Its Applications) Category: Keyword: blind source separation, microphone array, independent component analysis, SIMO model,
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Tracking of Speaker Direction by Integrated Use of Microphone Pairs in Equilateral-Triangle Yusuke HIOKA Nozomu HAMADA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2005/03/01 Vol. E88-A No. 3 ; pp. 633-641 Type of Manuscript: Special Section PAPER (Special Section on Adaptive Signal Processing and Its Applications) Category: Keyword: microphone array, speaker direction tracking, harmonic structure, steepest descent method, equilateral-triangular arrangement,
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Iterative Estimation and Compensation of Signal Direction for Moving Sound Source by Mobile Microphone Array Toshiharu HORIUCHI Mitsunori MIZUMACHI Satoshi NAKAMURA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2004/11/01 Vol. E87-A No. 11 ; pp. 2950-2956 Type of Manuscript: PAPER Category: Engineering Acoustics Keyword: direction-of-arrival estimation, adaptive algorithm, microphone array, moving source, source tracking,
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High-Fidelity Blind Separation of Acoustic Signals Using SIMO-Model-Based Independent Component Analysis Tomoya TAKATANI Tsuyoki NISHIKAWA Hiroshi SARUWATARI Kiyohiro SHIKANO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2004/08/01 Vol. E87-A No. 8 ; pp. 2063-2072 Type of Manuscript: PAPER Category: Engineering Acoustics Keyword: blind source separation, microphone array, independent component analysis, SIMO model,
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Overdetermined Blind Separation for Real Convolutive Mixtures of Speech Based on Multistage ICA Using Subarray Processing Tsuyoki NISHIKAWA Hiroshi ABE Hiroshi SARUWATARI Kiyohiro SHIKANO Atsunobu KAMINUMA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2004/08/01 Vol. E87-A No. 8 ; pp. 1924-1932 Type of Manuscript: Special Section PAPER (Special Section on Digital Signal Processing) Category: Speech/Acoustic Signal Processing Keyword: microphone array, blind source separation, independent component analysis, subarray processing, convolutive mixture,
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Microphone Array with Minimum Mean-Square Error Short-Time Spectral Amplitude Estimator for Speech Enhancement Hongseok KWON Jongmok SON Keunsung BAE
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2004/06/01 Vol. E87-A No. 6 ; pp. 1491-1494 Type of Manuscript: Special Section LETTER (Special Section on Papers Selected from 2003 International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC 2003)) Category: Keyword: microphone array, speech enhancement, minimum mean-square error short-time spectral amplitude,
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Sound Source Localization Using a Profile Fitting Method with Sound Reflectors Osamu ICHIKAWA Tetsuya TAKIGUCHI Masafumi NISHIMURA
Publication: IEICE TRANSACTIONS on Information and Systems Publication Date: 2004/05/01 Vol. E87-D No. 5 ; pp. 1138-1145 Type of Manuscript: Special Section PAPER (Special Section on Speech Dynamics by Ear, Eye, Mouth and Machine) Category: Keyword: sound source localization, microphone array, sound reflector, ICTD, ICLD,
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DOA Estimation of Speech Signal Using Microphones Located at Vertices of Equilateral Triangle Yusuke HIOKA Nozomu HAMADA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2004/03/01 Vol. E87-A No. 3 ; pp. 559-566 Type of Manuscript: Special Section PAPER (Special Section on Applications and Implementations of Digital Signal Processing) Category: Audio/Speech Coding Keyword: microphone array, DOA estimation, microphone pair, eigenspace analysis, harmonic structure, spatial resolution,
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Voice Activity Detection with Array Signal Processing in the Wavelet Domain Yusuke HIOKA Nozomu HAMADA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2003/11/01 Vol. E86-A No. 11 ; pp. 2802-2811 Type of Manuscript: PAPER Category: Engineering Acoustics Keyword: voice activity detection, microphone array, wavelet packet analysis, eigenspace analysis, speech features,
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Stable Learning Algorithm for Blind Separation of Temporally Correlated Acoustic Signals Combining Multistage ICA and Linear Prediction Tsuyoki NISHIKAWA Hiroshi SARUWATARI Kiyohiro SHIKANO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2003/08/01 Vol. E86-A No. 8 ; pp. 2028-2036 Type of Manuscript: Special Section PAPER (Special Section on Digital Signal Processing) Category: Keyword: microphone array, blind source separation, independent component analysis, linear prediction, whitening,
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Speaker Tracking for Hands-Free Continuous Speech Recognition in Noise Based on a Spectrum-Entropy Beamforming Method George NOKAS Evangelos DERMATAS
Publication: IEICE TRANSACTIONS on Information and Systems Publication Date: 2003/04/01 Vol. E86-D No. 4 ; pp. 755-758 Type of Manuscript: LETTER Category: Speech and Hearing Keyword: speaker tracking, microphone array, spectrum entropy, speech recognition, speaker beam-former,
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Blind Source Separation of Acoustic Signals Based on Multistage ICA Combining Frequency-Domain ICA and Time-Domain ICA Tsuyoki NISHIKAWA Hiroshi SARUWATARI Kiyohiro SHIKANO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2003/04/01 Vol. E86-A No. 4 ; pp. 846-858 Type of Manuscript: PAPER Category: Digital Signal Processing Keyword: blind source separation, time-domain independent component analysis, frequency-domain independent component analysis, reverberation, microphone array,
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Fast-Convergence Algorithm for Blind Source Separation Based on Array Signal Processing Hiroshi SARUWATARI Toshiya KAWAMURA Tsuyoki NISHIKAWA Kiyohiro SHIKANO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2003/03/01 Vol. E86-A No. 3 ; pp. 634-639 Type of Manuscript: Special Section LETTER (Special Section on Blind Signal Processing: Independent Component Analysis and Signal Separation) Category: Convolutive Systems Keyword: blind source separation, microphone array, independent component analysis, beamforming,
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Speech Enhancement by Profile Fitting Method Osamu ICHIKAWA Tetsuya TAKIGUCHI Masafumi NISHIMURA
Publication: IEICE TRANSACTIONS on Information and Systems Publication Date: 2003/03/01 Vol. E86-D No. 3 ; pp. 514-521 Type of Manuscript: Special Section PAPER (Special Issue on Speech Information Processing) Category: Robust Speech Recognition and Enhancement Keyword: speech enhancement, microphone array, beamformer, noise reduction, spectral subtraction, speech recognition,
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A Microphone Array-Based 3-D N-Best Search Method for Recognizing Multiple Sound Sources Panikos HERACLEOUS Satoshi NAKAMURA Takeshi YAMADA Kiyohiro SHIKANO
Publication: IEICE TRANSACTIONS on Information and Systems Publication Date: 2002/06/01 Vol. E85-D No. 6 ; pp. 994-1002 Type of Manuscript: PAPER Category: Speech and Hearing Keyword: 3-D N-best search, multiple sound sources, microphone array,
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Direction of Arrival Estimation Using Nonlinear Microphone Array Hidekazu KAMIYANAGIDA Hiroshi SARUWATARI Kazuya TAKEDA Fumitada ITAKURA Kiyohiro SHIKANO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2001/04/01 Vol. E84-A No. 4 ; pp. 999-1010 Type of Manuscript: Special Section PAPER (Special Section on Acoustic Signal Processing) Category: Keyword: nonlinear array signal processing, microphone array, DOA estimation, complementary beamforming,
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Sharp Directivity Function Based on Fourier Series Expansion and Its Directional System Realization with Small Number of Microphones Masataka NAKAMURA Toshitaka YAMATO Katsuhito KOUNO Atsuyuki TAKASHIMA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2001/04/01 Vol. E84-A No. 4 ; pp. 975-983 Type of Manuscript: Special Section PAPER (Special Section on Acoustic Signal Processing) Category: Keyword: beamformer, sharp directional pattern, microphone array, directional microphone, acoustic signal processing,
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A New Adaptation-Mode Control Based on Cross Correlation for a Robust Adaptive Microphone Array Osamu HOSHUYAMA Brigitte BEGASSE Akihiko SUGIYAMA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2001/02/01 Vol. E84-A No. 2 ; pp. 406-413 Type of Manuscript: Special Section PAPER (Special Section on Noise Cancellation and Reduction Techniques) Category: Microphone Array Keyword: microphone array, beamforming, adaptive signal processing, noise reduction,
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Sound Source Localization and Separation in Near Field Futoshi ASANO Hideki ASOH Toshihiro MATSUI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2000/11/25 Vol. E83-A No. 11 ; pp. 2286-2294 Type of Manuscript: PAPER Category: Engineering Acoustics Keyword: microphone array, near field, subspace method, minimum variance beamformer, spatial inverse filter,
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Speech Enhancement Using Nonlinear Microphone Array Based on Noise Adaptive Complementary Beamforming Hiroshi SARUWATARI Shoji KAJITA Kazuya TAKEDA Fumitada ITAKURA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2000/05/25 Vol. E83-A No. 5 ; pp. 866-876 Type of Manuscript: PAPER Category: Engineering Acoustics Keyword: speech enhancement, microphone array, complementary beamforming, noise adaptation, spectral subtraction,
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Speech Enhancement Using Nonlinear Microphone Array Based on Complementary Beamforming Hiroshi SARUWATARI Shoji KAJITA Kazuya TAKEDA Fumitada ITAKURA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1999/08/25 Vol. E82-A No. 8 ; pp. 1501-1510 Type of Manuscript: Special Section PAPER (Special Section on Digital Signal Processing) Category: Keyword: speech enhancement, microphone array, complementary beamforming, spectral subtraction, speech recognition,
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New Design Method of a Binaural Microphone Array Using Multiple Constraints Yoiti SUZUKI Shinji TSUKUI Futoshi ASANO Ryouichi NISHIMURA Toshio SONE
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1999/04/25 Vol. E82-A No. 4 ; pp. 588-596 Type of Manuscript: Special Section PAPER (Special Section on Advanced Signal Processing Techniques for Analysis of Acoustical and Vibrational Signals) Category: Keyword: adaptive beamforming, binaural, constraint, microphone array, multiple constraints, adaptive signal processing,
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A Robust Adaptive Beamformer with a Blocking Matrix Using Coefficient-Constrained Adaptive Filters Osamu HOSHUYAMA Akihiko SUGIYAMA Akihiro HIRANO
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1999/04/25 Vol. E82-A No. 4 ; pp. 640-647 Type of Manuscript: PAPER Category: Digital Signal Processing Keyword: beamforming, microphone array, adaptive signal processing, noise reduction,
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Realization of Wide-Band Directivity with Three Microphones Masataka NAKAMURA Katsuhito KOUNO Toshitaka YAMATO Kazuhiro SAKIYAMA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 1999/04/25 Vol. E82-A No. 4 ; pp. 619-625 Type of Manuscript: Special Section PAPER (Special Section on Advanced Signal Processing Techniques for Analysis of Acoustical and Vibrational Signals) Category: Keyword: speech recognition, beamformer, microphone array, high SN ratio, analog signal processing,
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