Satoshi TAKAHASHI


N-gram Approximation of Latent Words Language Models for Domain Robust Automatic Speech Recognition
Ryo MASUMURA Taichi ASAMI Takanobu OBA Hirokazu MASATAKI Sumitaka SAKAUCHI Satoshi TAKAHASHI 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2016/10/01
Vol. E99-D  No. 10  pp. 2462-2470
Type of Manuscript:  Special Section PAPER (Special Section on Recent Advances in Machine Learning for Spoken Language Processing)
Category: Language modeling
Keyword: 
language modelsdomain robustnesslatent words language modelsn-gram approximationautomatic speech recognition
 Summary | Full Text:PDF(539.2KB)

Automatic Vocabulary Adaptation Based on Semantic and Acoustic Similarities
Shoko YAMAHATA Yoshikazu YAMAGUCHI Atsunori OGAWA Hirokazu MASATAKI Osamu YOSHIOKA Satoshi TAKAHASHI 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2014/06/01
Vol. E97-D  No. 6  pp. 1488-1496
Type of Manuscript:  Special Section PAPER (Special Section on Advances in Modeling for Real-world Speech Information Processing and its Application)
Category: Speech Recognition
Keyword: 
out-of-vocabularyvocabulary adaptationsemantic similarityacoustic similarity
 Summary | Full Text:PDF(1.1MB)

Efficient Combination of Likelihood Recycling and Batch Calculation for Fast Acoustic Likelihood Calculation
Atsunori OGAWA Satoshi TAKAHASHI Atsushi NAKAMURA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2011/03/01
Vol. E94-D  No. 3  pp. 648-658
Type of Manuscript:  PAPER
Category: Speech and Hearing
Keyword: 
fast acoustic likelihood calculationstate likelihood recyclingbatch state likelihood calculationcombined acceleration techniqueacoustic backing-off
 Summary | Full Text:PDF(823.2KB)

A Method of Cognizing Primary and Secondary Radio Signals
Satoshi TAKAHASHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2010/12/01
Vol. E93-A  No. 12  pp. 2682-2690
Type of Manuscript:  Special Section PAPER (Special Section on Wideband Systems)
Category: 
Keyword: 
mobile radio communicationscognitive radiosignal detectiondynamic spectrum accessenergy sensingbandwidth differentiation
 Summary | Full Text:PDF(790.4KB)

A CFAR Circuit with Multiple Detection Cells for Automotive UWB Radars
Satoshi TAKAHASHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2010/06/01
Vol. E93-B  No. 6  pp. 1574-1582
Type of Manuscript:  PAPER
Category: Sensing
Keyword: 
automotive radarradar clutterCFARautomatic target detectionspatial correlation
 Summary | Full Text:PDF(696.3KB)

Automatic Generation of User Manuals without Automation Surprises for Human-Machine Systems Modeled by Discrete Event Systems
Toshimitsu USHIO Satoshi TAKAHASHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/11/01
Vol. E91-A  No. 11  pp. 3237-3244
Type of Manuscript:  Special Section PAPER (Special Section on Concurrent/Real-time and Hybrid Systems: Theory and Applications)
Category: 
Keyword: 
discrete event systemshuman-machine systemsuser manualautomation surprises
 Summary | Full Text:PDF(261.7KB)

Robust Speech Recognition by Model Adaptation and Normalization Using Pre-Observed Noise
Satoshi KOBASHIKAWA Satoshi TAKAHASHI 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2008/03/01
Vol. E91-D  No. 3  pp. 422-429
Type of Manuscript:  Special Section PAPER (Special Section on Robust Speech Processing in Realistic Environments)
Category: Noisy Speech Recognition
Keyword: 
noise robustnessdistant-talkingspectral subtractionHMM-compositioncepstral mean normalization
 Summary | Full Text:PDF(461.8KB)

Stochastic Method of Determining Substream Modulation Levels for MIMO Eigenbeam Space Division Multiplexing
Satoshi TAKAHASHI Chang-Jun AHN Hiroshi HARADA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2006/01/01
Vol. E89-B  No. 1  pp. 142-149
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
mobile radio propagationadaptive modulationmultipath environmentsray tracingMIMOE-SDM
 Summary | Full Text:PDF(464.2KB)

Adaptive Subcarrier Block Modulation with Differentially Modulated Pilot Symbol Assistance for Downlink OFDM Using Uplink Delay Spread
Chang-Jun AHN Satoshi TAKAHASHI Hiroshi HARADA Yukiyoshi KAMIO Iwao SASASE 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2005/07/01
Vol. E88-A  No. 7  pp. 1889-1896
Type of Manuscript:  Special Section PAPER (Special Section on Multi-dimensional Mobile Information Networks)
Category: Wireless Communication Technology
Keyword: 
DMPSA-ASMS/OFDMMLIcoherence bandwidthRMS delay spread
 Summary | Full Text:PDF(592.2KB)

Effect of Delay Spread Enhancement in MIMO Eigenbeam Space Division Multiplexing Transmission
Satoshi TAKAHASHI Chang-Jun AHN Hiroshi HARADA Yukiyoshi KAMIO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2005/07/01
Vol. E88-A  No. 7  pp. 1931-1935
Type of Manuscript:  Special Section LETTER (Special Section on Multi-dimensional Mobile Information Networks)
Category: 
Keyword: 
radio propagationdelay spreadMIMOE-SDM
 Summary | Full Text:PDF(392.6KB)

Differential Modulated Pilot Symbol Assisted Adaptive OFDM for Reducing the MLI with Predicted FBI
Chang-Jun AHN Satoshi TAKAHASHI Hiroshi HARADA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/02/01
Vol. E88-B  No. 2  pp. 436-442
Type of Manuscript:  Special Section PAPER (Special Section on Multi-carrier Signal Processing Techniques for Next Generation Mobile Communications--Part2)
Category: 
Keyword: 
AMS/OFDMMLIFBI
 Summary | Full Text:PDF(520.1KB)

Reverse Link Performance Improvement for Wideband OFDM Using Alamouti Coded Heterogeneous Polarization Antennas
Chang-Jun AHN Yukiyoshi KAMIO Satoshi TAKAHASHI Hiroshi HARADA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2004/11/01
Vol. E87-B  No. 11  pp. 3281-3288
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
OFDMSTBCpolarizationXPD
 Summary | Full Text:PDF(602.8KB)

Study and Analysis of System LSI Design Methodologies Using C-Based Behavioral Synthesis
Hidefumi KUROKAWA Hiroyuki IKEGAMI Motohide OTSUBO Kiyoshi ASAO Kazuhisa KIRIGAYA Katsuya MISU Satoshi TAKAHASHI Tetsuji KAWATSU Kouji NITTA Hiroshi RYU Kazutoshi WAKABAYASHI Minoru TOMOBE Wataru TAKAHASHI Akira MUKOUYAMA Takashi TAKENAKA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2003/04/01
Vol. E86-A  No. 4  pp. 787-798
Type of Manuscript:  Special Section PAPER (Special Section of Selected Papers from the 15th Workshop on Circuits and Systems in Karuizawa)
Category: 
Keyword: 
C-based designbehavioral synthesisverificationdesign productivitymodel abstraction
 Summary | Full Text:PDF(2.1MB)

Microwave Propagation Characteristics in an Urban Quasi Line-of-Sight Environment under Different Traffic Conditions
Hironari MASUI Masanori ISHII Satoshi TAKAHASHI Hiroyuki SHIMIZU Takehiko KOBAYASHI Masami AKAIKE 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2001/05/01
Vol. E84-B  No. 5  pp. 1431-1439
Type of Manuscript:  PAPER
Category: Antenna and Propagation
Keyword: 
mobile communicationradio propagationbreak pointdelay spreadmicrowave
 Summary | Full Text:PDF(644.2KB)

Stochastic Prediction of Transmission Performance in Mobile Communication Systems Employing Anti-Multipath Techniques in Urban Propagation Environments
Satoshi TAKAHASHI Takehiko KOBAYASHI Kouzou KAGE Koichi TAKAHASHI Hironari MASUI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1999/12/25
Vol. E82-B  No. 12  pp. 1987-1996
Type of Manuscript:  Special Section PAPER (Special Issue on Multimedia Mobile Communication Systems)
Category: 
Keyword: 
broadband mobile communicationtransmission performancemultipath propagationcharacteristic function methodRAKE receptionparallel transmission
 Summary | Full Text:PDF(1.1MB)

Distance Dependence of Microwave Delay Spreads Measured in Urban Quasi Line-of-Sight Environments
Hironari MASUI Koichi TAKAHASHI Satoshi TAKAHASHI Kouzou KAGE Takehiko KOBAYASHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1999/12/25
Vol. E82-B  No. 12  pp. 1997-2003
Type of Manuscript:  Special Section PAPER (Special Issue on Multimedia Mobile Communication Systems)
Category: 
Keyword: 
mobile communicationradio propagationdelay spreadbreak pointmicrowave
 Summary | Full Text:PDF(1.1MB)

Path Loss Modeling of Line-of-Sight Microwave Urban Propagation with Low-Height Antenna Mobile Stations
Koichi TAKAHASHI Hironari MASUI Satoshi TAKAHASHI Kouzou KAGE Takehiko KOBAYASHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1999/07/25
Vol. E82-C  No. 7  pp. 1330-1333
Type of Manuscript:  Special Section LETTER (Special Issue on Microwave and Millimeter Wave Technology)
Category: 
Keyword: 
mobile communicationradio propagationpath lossexcess losslow antenna height
 Summary | Full Text:PDF(428.4KB)

Delay Profile Measurement System for Microwave Broadband Transmission and Analysis of Delay Characteristics in an Urban Environment
Hironari MASUI Koichi TAKAHASHI Satoshi TAKAHASHI Kouzou KAGE Takehiko KOBAYASHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1999/07/25
Vol. E82-C  No. 7  pp. 1287-1292
Type of Manuscript:  Special Section PAPER (Special Issue on Microwave and Millimeter Wave Technology)
Category: Systems
Keyword: 
microwave propagationurban areasdelay profiledelay spreadmobile antenna height
 Summary | Full Text:PDF(948.1KB)

Difference of Path-Loss Characteristics due to Mobile Antenna Heights in Microwave Urban Propagation
Hironari MASUI Koichi TAKAHASHI Satoshi TAKAHASHI Kouzou KAGE Takehiko KOBAYASHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1999/07/25
Vol. E82-A  No. 7  pp. 1144-1150
Type of Manuscript:  Special Section PAPER (Special Section on Multi-dimensional Mobile Information Networks)
Category: 
Keyword: 
microwave propagationurban areaspath lossbreak pointmobile antenna height
 Summary | Full Text:PDF(927.9KB)

Propagation-Loss Prediction Using Ray Tracing with a Random-Phase Technique
Satoshi TAKAHASHI Yoshihide YAMADA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1998/07/25
Vol. E81-A  No. 7  pp. 1445-1451
Type of Manuscript:  Special Section PAPER (Special Section on Fundamentals of Multi-dimensional Mobile Information Network)
Category: 
Keyword: 
radio propagationpropagation-loss predictionray tracingrandom-phase techniqueprobability-based cell design
 Summary | Full Text:PDF(652.5KB)

An HMM State Duration Control Algorithm Applied to Large-Vocabulary Spontaneous Speech Recognition
Satoshi TAKAHASHI Yasuhiro MINAMI Kiyohiro SHIKANO 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 1995/06/25
Vol. E78-D  No. 6  pp. 648-653
Type of Manuscript:  Special Section PAPER (Special Issue on Spoken Language Processing)
Category: 
Keyword: 
HMMduration controltrellis likelihood calculationlarge-vocabulary speech recognition
 Summary | Full Text:PDF(588.2KB)

Isolated Word Recognition Using Pitch Pattern Information
Satoshi TAKAHASHI Sho-ichi MATSUNAGA Shigeki SAGAYAMA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1993/02/25
Vol. E76-A  No. 2  pp. 231-236
Type of Manuscript:  PAPER
Category: Speech
Keyword: 
word recognitionpitch patternaccent typeHMM
 Summary | Full Text:PDF(520KB)