Patents by Inventor Katsuaki Satoh

Katsuaki Satoh has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20190157229
    Abstract: Provided is an electrode like a protruding electrode that is self-standing on a substrate. A conductive paste (202) contains a conductive powder, an alcoholic liquid component, and no adhesives. The conductive powder contains conductive particles having a thickness of 0.05 ?m or more and 0.1 ?m or less and a representative length of 5 ?m or more and 10 ?m or less, the representative length being a maximum diameter in a plane perpendicular to the direction of the thickness. The weight percentage of the alcoholic liquid component relative to the conductive paste is 8% or more and 20% or less.
    Type: Application
    Filed: April 28, 2017
    Publication date: May 23, 2019
    Applicants: Sharp Kabushiki Kaisha, Osaka University
    Inventors: Tomotoshi SATOH, Hiroya SATO, Katsuaki SUGANUMA, Aiji SUETAKE, Shijo NAGAO, Jinting JIU, Seiichiro KIHARA
  • Patent number: 10068585
    Abstract: An echo canceller device is provided with a first filter unit that generates a first output signal y1(k) by filtering a first input signal x1(k) with a filter coefficient h(k), an adaptation unit that modifies the filter coefficient h(k) on the basis of an adaptation algorithm so that a first error signal e1(k) becomes small, a first delaying unit that delays a first objective signal d1(k) by a certain time period ? and outputs the signal as a second objective signal d2(k), a second delaying unit that delays the first input signal x1(k) by the certain time period ? and outputs the signal as a second input signal x2(k), and a second filter unit that generates a second output signal y2(k) by filtering the second input signal x2(k) by the filter coefficient h(k) modified by the adaptation unit.
    Type: Grant
    Filed: July 24, 2015
    Date of Patent: September 4, 2018
    Assignee: AMENITY RESEARCH INSTITUTE CO., LTD.
    Inventors: Eiji Misawa, Toshio Yagi, Yasumasa Shibata, Hiroyuki Toyozumi, Kiyotsugu Arai, Katsuaki Satoh
  • Publication number: 20170178663
    Abstract: An echo canceller device is provided with a first filter unit that generates a first output signal y1(k) by filtering a first input signal x1(k) with a filter coefficient h(k), an adaptation unit that modifies the filter coefficient h(k) on the basis of an adaptation algorithm so that a first error signal e1(k) becomes small, a first delaying unit that delays a first objective signal d1(k) by a certain time period ? and outputs the signal as a second objective signal d2(k), a second delaying unit that delays the first input signal x1(k) by the certain time period ? and outputs the signal as a second input signal x2(k), and a second filter unit that generates a second output signal y2(k) by filtering the second input signal x2(k) by the filter coefficient h(k) modified by the adaptation unit.
    Type: Application
    Filed: July 24, 2015
    Publication date: June 22, 2017
    Applicant: AMENITY RESEARCH INSTITUTE CO., LTD.
    Inventors: Eiji MISAWA, Toshio YAGI, Yasumasa SHIBATA, Hiroyuki TOYOZUMI, Kiyotsugu ARAI, Katsuaki SATOH
  • Patent number: 5073946
    Abstract: A speaker which is thin but which is capable of providing high-fidelity reproduction and ensuring a suitable level of sound pressure even when it is brought close to a wall. A closed chamber is formed behind one part of a disphragm mounted in an enclosure, and an open chamber is formed behind another part of the diaphragm. At least one voice coil driver unit is connected to the diaphragm. The phase difference between sounds radiated from the front and rear surfaces of the diaphragm is increased as large as possible by using an acoustic duct for the sound radiated through the open chamber, thereby minimizing cancellation of sounds and improving the sound pressure level.
    Type: Grant
    Filed: November 28, 1989
    Date of Patent: December 17, 1991
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Katsuaki Satoh, Kazue Sato, Kousaku Murata, Tsuneo Tanaka, Shuji Saiki, Satoshi Takayama, Hiroyuki Takewa, Mitsuhiko Serikawa, Seiichi Ishikawa, Sawako Usuki, Yoichi Kimura, Shuichi Obata
  • Patent number: 5051942
    Abstract: A transfer function is determined in accordance with an amplitude characteristic and a phase characteristic. The transfer function is subjected to inverse Fourier transform. An imaginary part of a result of the inverse Fourier transform is set to zero and thereby the result of the inverse Fourier transform is converted into a converted result. The converted result is subjected to Fourier transform. The amplitude characteristic and the phase characteristic are updated in accordance with a result of the Fourier transform. Such processes are reiterated. A primary desired amplitude characteristic is corrected in accordance with the finally-obtained amplitude characteristic so that the primary desired amplitude characteristic is converted into a final desired amplitude characteristic. A final desired phase characteristic is determined in accordance with the finally-obtained phase characteristic.
    Type: Grant
    Filed: December 15, 1988
    Date of Patent: September 24, 1991
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Masaharu Matsumoto, Seiichi Ishikawa, Katsuaki Satoh
  • Patent number: 5025474
    Abstract: A speaker system has an acoustic diaphragm and an image projection screen provided on a surface of the diaphragm integrally therewith so as to enable the user to enjoy both realistic image on the screen and powerful sound reproduced through the diaphragm. The rear surface of the diaphragm is closed at a peripheral portion thereof while the central portion of the rear surface of the diaphragm is opened to the exterior, so that the speaker system can provide a high level of reproduced sound pressure in low-pitched region, while the thickness of the speaker is reduced remarkably. The diaphgram can be driven by a plurality of driving units so that the speaker system can operate only with an ordinary stereophonic amplifier.
    Type: Grant
    Filed: September 27, 1988
    Date of Patent: June 18, 1991
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Tsuneo Tanaka, Kazue Sato, Hiroyuki Takewa, Akira Kurozuka, Tadashi Tamura, Katsuji Hattori, Satoshi Takayama, Kosaku Murata, Katsuaki Satoh, Mituhiko Serikawa, Youichi Kimura, Shuichi Obata
  • Patent number: 5023913
    Abstract: An apparatus for changing a sound field, comprising at least two signal processing means, which can smoothly and continuously switch a sound field into an arbitrary sound field without a break of signals by alternately switching one of the signal processing means into the other.
    Type: Grant
    Filed: May 26, 1989
    Date of Patent: June 11, 1991
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Masaharu Matsumoto, Katsuaki Satoh, Seiichi Ishikawa, Mitsuhiko Serikawa, Akihisa Kawamura, Hikari Hashimoto
  • Patent number: 4924962
    Abstract: A sound reproducing apparatus for use in a vehicle having a speaker system constituted by at least one acoustic duct and a speaker unit disposed at a throat of the acoustic duct, an opening formed at the other end of the acoustic duct facing the passenger compartment of a vehicle. The apparatus is arranged such that, F0 and Fs are substantially equal to each other. Where Fs is the lowest frequency in a frequency range within which the imaginary part of the acoustic impedance at the sound radiating surface of the speaker system in the direction of the space within the passsenger compartment is zero and F0 is the low-range resonance frequency of the speaker system itself in the free space.
    Type: Grant
    Filed: July 10, 1987
    Date of Patent: May 15, 1990
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kenichi Terai, Shuji Saiki, Kousaku Murata, Katsuaki Satoh, Yoichi Kumura, Yasutoshi Nakama, Michiko Ogawa, Shuichi Obata
  • Patent number: 4896285
    Abstract: An apparatus for calculating a filter factor for a digital filter which can be simply constructed and in which the time period for calculation can be shortened as compared with conventional techniques. The apparatus has an input circuit for inputting a desirable frequency property, a division circuit for dividing the inputted frequency property into a plurality of frequency bands, and a calculating circuit for obtaining filter factors for realizing a frequency property of each of the divided frequency bands. The input circuit inputs the frequency property with a frequency resolution corresponding to the number of the filter factors. The division circuit performs a correction for a division so that the frequency property becomes zero from a frequency over the high cut-off frequency of a band-pass filter toward the Nyquist frequency of the frequency band corresponding to the transversal filter, the Nyquist frequency being 1/2 of the sampling frequency.
    Type: Grant
    Filed: January 15, 1988
    Date of Patent: January 23, 1990
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Seiichi Ishikawa, Masaharu Matsumoto, Katsuaki Satoh, Akihisa Kawamura
  • Patent number: 4888808
    Abstract: A digital equalizer for audio system applications is based on a FIR (finite impulse response) digital filter whose amplitude and phase/frequency characteristics can be respectively independently established in accordance with input data representing an arbitrary amplitude/frequency characteristic and input phase data from which an arbitrary phase/frequency characteristic for the filter can be derived. In addition to audio frequency response equalization, the apparatus can be provided with a microphone howl suppression function.
    Type: Grant
    Filed: March 22, 1988
    Date of Patent: December 19, 1989
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Seiichi Ishikawa, Masaharu Matsumoto, Katsuaki Satoh, Akihisa Kawamura
  • Patent number: 4484383
    Abstract: A multi-layer block to be developed into a disk having a honeycomb construction is initially developed into a columnar block, and then the bottom of the columnar block is radially developed for obtaining a core of a speaker diaphragm. A suitable circular thin layer is attached to the top and bottom of the core to complete a diaphragm. The columnar block may be developed by means of a cone-shaped tool into a truncated cone, and this truncated cone may be further developed into a flat disk by applying a force to the top thereof. Since the forces on development are applied to the block uniformly, the density of hexagonal sections of the honeycomb construction is uniform throughout the entire circumference of the core providing superior speaker characteristics.
    Type: Grant
    Filed: June 21, 1982
    Date of Patent: November 27, 1984
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiroyuki Takewa, Katsuaki Satoh, Seiichi Ishikawa