1
Masahito Togami, Shinji Sakano, Toshiyuki Matsuda: Acoustic echo canceller system. Hitachi, Antonelli Terry Stout & Kraus, February 28, 2012: US08126161 (11 worldwide citation)

An acoustic echo canceller system having a filter with high suppression performance of acoustic echo, generated by using microphone array having a plurality of microphone elements, judging a band where only a speaker sound is present, based on phase difference among microphones, and carrying out ada ...


2
Kazuyuki Takizawa, Masahito Togami: Portable terminal device. Casio Hitachi Mobile Communications, Cohen Pontani Lieberman & Pavane, January 25, 2011: US07877125 (2 worldwide citation)

A portable terminal device can extrapolate the position of a sound source in the thicknesswise direction regardless of the use style. A slide type portable terminal has an upper casing, a lower casing, and a coupling part that couples the casings in such a way that their positional relation is chang ...


3
Atsushi Koike, Masahito Togami: Noise suppression system, sound acquisition apparatus, sound output apparatus, and computer-readable medium. Casio Hitachi Mobile Communications, Cozen O Connor, April 24, 2012: US08165641 (2 worldwide citation)

The sound acquisition apparatus broadcasts a sound “output notice request” through a communication network. In response to the request by the sound acquisition apparatus, the sound output apparatus gives notification of starting a sound output operation, the sound acquisition apparatus requests the ...


4
Toshihiro Kujirai, Masahito Togami, Yasunari Obuchi: Sound collection system. Hitachi, Stites & Harbison PLLC, Juan Carlos A Marquez Esq, September 8, 2009: US07587055 (2 worldwide citation)

Collecting the sound while rotating at least one or more microphone around a rotational axis, the filter processing is carried out in accordance with the positional information of the microphone at each point.


5
Yohei Kawaguchi, Yuichiro Hashimoto, Masuyuki Sugiyama, Shun Kumano, Akihito Kaneko, Masahito Togami, Kazushige Nishimura, Hiroyuki Inoue: Mass spectrometric system. Hitachi High Technologies Corporation, Crowell & Moring, March 15, 2016: US09287105 (1 worldwide citation)

There is a tendency of the intensity and the shape of a spectrum to be measured transitioning with the passage of measured time, depending on the volatility and the reactivity of a component. A mass spectrometric system includes: a mass spectrometric unit that measures a specimen and outputs a mass ...


6
Masahito Togami, Yohei Kawaguchi: Sound monitoring system for sound field selection based on stored microphone data. Hitachi, Antonelli Terry Stout & Kraus, March 25, 2014: US08682675 (1 worldwide citation)

Monitoring accuracy degrades due to a noise where many sound sources exist other than those to be monitored. A sound monitoring system includes a microphone array having multiple microphones and a location-based abnormal sound monitoring section. The location-based abnormal sound monitoring section ...


7
Masahito Togami, Yohei Kawaguchi: Dereverberation parameter estimation device and method, dereverberation/echo-cancellation parameter estimation device, dereverberation device, dereverberation/echo-cancellation device, and dereverberation device online conferencing system. Hitachi, Crowell & Moring, March 15, 2016: US09288576 (1 worldwide citation)

In a conventional dereverberation system, when there is a fluctuating reverberation component, it has been difficult to determine, with high accuracy, a linear dereverberation filter for removing a non-fluctuating reverberation component. An algorithm integrating a dereverberation system using a lin ...


8
Masahito Togami, Akio Amano: Voice communication device, voice communication method, and voice communication program. Hitachi, Antonelli Terry Stout & Kraus, June 11, 2013: US08462190 (1 worldwide citation)

Provided is a voice communication device for carrying out voice communication among a plurality of locations, including: a sound source direction identification block for identifying a direction of a sound source; a voice sender block for sending the collected voice to a different location; a voice ...


9
Masahito Togami, Tatehito Usui, Kosa Hirota, Satomi Inoue, Shigeru Nakamoto: Plasma processing apparatus and operational method thereof. Hitachi High Technologies Corporation, Miles & Stockbridge P C, September 19, 2017: US09767997

A plasma processing apparatus includes: a detector configured to detect a change in an intensity of light emission from plasma formed inside a processing chamber; and a unit configured to adjust conditions for forming the plasma or processing a wafer arranged inside the processing chamber using an o ...


10
Yohei Kawaguchi, Tatehito Usui, Masahito Togami, Satomi Inoue, Shigeru Nakamoto: Plasma processing apparatus and operating method of plasma processing apparatus. Hitachi High Technologies Corporation, Mattingly & Malur PC, April 3, 2018: US09934946

A plasma processing device performing etching processing to a sample disposed in a processing chamber disposed in a vacuum vessel by using plasma formed in the processing chamber includes a light detector, a component detector, and a determination unit. The light detector detects light intensity of ...