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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 20 of 26  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
EMCJ, IEE-EMC 2020-11-27
13:35
Online Online Lens Antenna System Design and Beam Focal Field Distribution Measurement in Millimeter-Wave Band Focusing/Parallel Beam Measurement System
Takuma Okamoto, Atsuhiro Nishikata (TokyoTech), Masataka Midori, Hiroshi Kurihara (TDK) EMCJ2020-51
 [more] EMCJ2020-51
pp.1-6
EMCJ 2020-04-17
14:00
Ishikawa Kanazawa Univ. Satellite 3F
(Cancelled but technical report was issued)
Construction of Focused/Parallel Beam Measurement System in Millimeter Wave Band and Improvement of Calculation Procedure of Transmission and Reflection Characteristics for Anisotropic Planer Materials
Takuma Okamoto, Atsuhiro Nishikata (Tokyo Tech), Hiroshi Kurihara (TDK) EMCJ2020-2
The focused beam method and the parallel beam method, which are used as electrical constant measurement methods mainly f... [more] EMCJ2020-2
pp.5-10
SP, EA, SIP 2020-03-02
09:20
Okinawa Okinawa Industry Support Center
(Cancelled but technical report was issued)
Investigation of neural speech rate conversion with multi-speaker WaveNet vocoder
Takuma Okamoto (NICT), Keisuke Matsubara (Kobe Univ./NICT), Tomoki Toda (Nagoya Univ./NICT), Yoshinori Shiga, Hisashi Kawai (NICT) EA2019-101 SIP2019-103 SP2019-50
Speech rate conversion technology, which can expand or compress speech waveforms without changing pitch of sound, is con... [more] EA2019-101 SIP2019-103 SP2019-50
pp.1-6
EMCJ 2019-07-18
10:05
Tokyo Kikai-Shinko-Kaikan Bldg. Formulation of focused beam method by plane wave spectrum representation for anisotropic planar material measurement system
Takuma Okamoto, Atsuhiro Nishikata (Tokyo Tech), Hiroshi Kurihara (TDK) EMCJ2019-18
 [more] EMCJ2019-18
pp.1-5
EA, US
(Joint)
2019-01-22
16:15
Kyoto Doshisha Univ. [Invited Talk] Spatial Fourier transform-based localized sound zone generation with loudspeaker arrays
Takuma Okamoto (NICT) EA2018-98
This paper provides spatial Fourier transform-based localized sound zone generation methods with multiple loudspeakers. ... [more] EA2018-98
pp.31-36
EA, ASJ-H 2017-08-09
15:45
Miyagi Tohoku Univ., R. I. E. C. [Invited Talk] Realization of 252ch real-time processing of SENZI binaural sound-space sensing and reproduction method
Shuichi Sakamoto (Tohoku Univ.), Satoshi Hongo (NIT, Sendai College), Takuma Okamoto (NICT), Yukio Iwaya (Tohoku Gakuin Univ.), Yo-iti Suzuki (Tohoku Univ.) EA2017-33
It is crucially important to reproduce accurate auditory spatial information around listeners for development of advance... [more] EA2017-33
pp.39-40
EA, ASJ-H 2015-08-03
15:50
Miyagi Tohoku Univ., Research Inst. of Electrical Communication Multiple sound spots generation by spatial filtering in wavenumber domain using a linear loudspeaker array
Takuma Okamoto (NICT), Atsushi Sakaguchi (Panasonic) EA2015-15
An analytical method for generating acoustically bright and dark zones at arbitrary horizontal positions using a linear ... [more] EA2015-15
pp.29-34
EA 2014-04-17
15:30
Kyoto NICT Universal Communication Research Lab. Spherical harmonic encoding of moving sound sources
Jorge Trevino (Tohoku Univ.), Takuma Okamoto (NICT), Yukio Iwaya (Tohoku Gakuin Univ.), Yo-iti Suzuki (Tohoku Univ.) EA2014-3
The spatial information of sound fields can be encoded using the spherical harmonic functions. This is often applied to ... [more] EA2014-3
pp.19-24
EA 2014-04-17
16:05
Kyoto NICT Universal Communication Research Lab. Local sound area generation using a circular loudspeaker array and an additional loudspeaker
Takuma Okamoto (NICT) EA2014-4
Reproduction errors are occurred except at the reference circle in sound field reproduction using a circular loudspeaker... [more] EA2014-4
pp.25-30
EA 2013-12-13
15:50
Ishikawa Satellite Plaza of Kanazawa University Multiple sound spots generation by spatial filtering in wavenumber domain using a linear loudspeaker array
Takuma Okamoto (NICT) EA2013-94
Novel signal processing is proposed for generating acoustically bright and dark zones at arbitrary horizontal positions ... [more] EA2013-94
pp.37-42
EA 2013-10-11
12:30
Kyoto NTT CS Lab. Sound field recording and reproduction by multiple parallel linear arrays using crosstalk cancellers in spatio-temporal frequency domain
Takuma Okamoto, Seigo Enomoto, Ryouichi Nishimura (NICT) EA2013-64
A novel signal processing for sound field recording and reproduction using parallel multiple linear microphone / loudspe... [more] EA2013-64
pp.1-8
COMP 2013-06-24
10:00
Nara Nara Women's University Morpion Solitaire: a new upper bound 121 of the maximum score
Akitoshi Kawamura (Univ. of Tokyo), Takuma Okamoto, Yuichi Tatsu, Yushi Uno, Masahide Yamato (Osaka Prefecture Univ.) COMP2013-19
Morpion Solitaire is a pencil-and-paper game for a single player, popular in several countries including
France. A move... [more]
COMP2013-19
pp.1-6
EA, EMM 2012-11-17
14:10
Oita OITA Univ. Estimation of sound field based on inversion of Kirchhoff-Helmholtz integral equation and forward wave propagation
Takuma Okamoto, Seigo Enomoto, Ryouichi Nishimura (NICT) EA2012-105 EMM2012-87
We propose a novel sound field estimation method based on inversion of Kirchhoff-Helmholtz integral equation and forward... [more] EA2012-105 EMM2012-87
pp.141-146
EA 2012-08-01
14:40
Miyagi Tohoku Gakuin University Improvement of the accuracy of 3D sound space synthesized by 252ch real-time processing of SENZI sound space information acquisition system
Shuichi Sakamoto, Jumpei Matsunaga (Tohoku Univ.), Satoshi Hongo (SNCT), Takuma Okamoto (NICT), Yukio Iwaya (Tohoku Gakuin Univ.), Yo-iti Suzuki (Tohoku Univ.) EA2012-55
 [more] EA2012-55
pp.7-12
EA 2012-08-02
10:40
Miyagi Tohoku Gakuin University Loudspeaker configurations for acoustic crosstalk cancellers robust to small head rotation
Cheolsu Han (Tohoku Univ.), Takuma Okamoto (NICT), Yukio Iwaya (Tohoku Gakuin Univ.), Yo-iti Suzuki (Tohoku Univ.) EA2012-60
The implementation of virtual auditory displays using loudspeakers typically requires filters that effectively cancel cr... [more] EA2012-60
pp.37-42
EMM 2011-11-14
15:45
Miyagi   Acoustic privacy area generation based on simple summation of numerous signals from a multichannel loudspeaker array
Takuma Okamoto, Yukio Iwaya, Yo-iti Suzuki (Tohoku Univ.) EMM2011-44
We validate the usability of a simple sound spot generation technique based on simple summation of numerous signals usin... [more] EMM2011-44
pp.25-30
EA 2011-10-29
09:00
Nagano Faculty of Engineering, Shinshu Univ. Three-dimensional distributions of loudspeakers suitable for crosstalk cancellers robust to the head rotation
Cheolsu Han, Takuma Okamoto, Yukio Iwaya, Yo-iti Suzuki (Tohoku Univ.) EA2011-76
A virtual auditory display is often implemented by using two loudspeakers with a crosstalk canceller. This crosstalk can... [more] EA2011-76
pp.49-53
EA 2010-08-09
13:00
Miyagi Tohoku Univ. Implementation of a shperical 121-microphone array for recording sound field based on higher order Ambisonics
Takuma Okamoto, Yukio Iwaya, Shuichi Sakamoto, Yo-iti Suzuki (Tohoku Univ.) EA2010-43
For realizing communications systems with very high sense-of-presence, technologies to record and re- produce three dime... [more] EA2010-43
pp.1-6
EA 2010-08-09
13:30
Miyagi Tohoku Univ. Comparative performance evaluation of near 3D sound field reproduction system using directional loudspeakers and wave field synthesis
Toshiyuki Kimura (NICT), Yoko Yamakata (Kyoto Univ.), Michiaki Katsumoto (NICT), Takuma Okamoto (Tohoku Univ.), Satoshi Yairi (Sendai National Coll. of Tech.), Yukio Iwaya, Yo-iti Suzuki (Tohoku Univ.) EA2010-44
It is very important to develop near 3D sound field reproduction techniques in order to realize the ultra-realistic comm... [more] EA2010-44
pp.7-12
EA 2010-08-09
14:45
Miyagi Tohoku Univ. 3D sound space information recording system using 252ch isopycnic and spherical microphone array
Shuichi Sakamoto, Jun'ichi Kodama (Tohoku Univ.), Satoshi Hongo (SNCT), Takuma Okamoto, Yukio Iwaya, Yo-iti Suzuki (Tohoku Univ.) EA2010-46
We are developing a system to acquire 3D sound-space information that can transmit accurate sound-space information to a... [more] EA2010-46
pp.19-23
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