Patents by Inventor Masataka Yamaguchi

Masataka Yamaguchi 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: 20210327456
    Abstract: An anomaly detection technique which realizes high accuracy while reducing cost required for normal model learning is provided. An anomaly detection apparatus includes an anomaly degree estimating unit configured to estimate an anomaly degree indicating a degree of anomaly of anomaly detection target equipment from sound emitted from the anomaly detection target equipment (hereinafter, referred to as anomaly detection target sound) based on association between a first probability distribution indicating distribution of normal sound emitted from one or more pieces of equipment different from the anomaly detection target equipment and normal sound emitted from the anomaly detection target equipment (hereinafter, referred to as normal sound for adaptive learning).
    Type: Application
    Filed: July 4, 2019
    Publication date: October 21, 2021
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Masataka YAMAGUCHI, Yuma KOIZUMI, Noboru HARADA
  • Publication number: 20210303629
    Abstract: Clustering can be performed using a self-expression matrix in which noise is suppressed. A self-expression matrix is calculated that minimizes an objective function that is for obtaining, from among matrices included in a predetermined matrix set, a self-expression matrix whose elements are linear weights when data points in a data set are expressed by linear combinations of points, the objective function being represented by a term for obtaining the residual between data points in the data set and data points expressed by linear combinations of points using the self-expression matrix, a first regularization term that is multiplied by a predetermined weight and is for reducing linear weights of the data points that have a large Euclidean norm in the self-expression matrix, and a second regularization term for the self-expression matrix. A similarity matrix defined by the calculated self-expression matrix is then calculated.
    Type: Application
    Filed: July 26, 2019
    Publication date: September 30, 2021
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Masataka YAMAGUCHI, Go IRIE, Kaoru HIRAMATSU, Kunio KASHINO
  • Patent number: 7848215
    Abstract: An optical-recording medium is provided with at least a first recording layer for recording information optically; and a second recording layer for recording information optically by a light beam that passes through said first recording layer; wherein the track pitch of a recording track that is formed on said second recording layer is narrower than the track pitch of a recording track that is formed on said first recording layer.
    Type: Grant
    Filed: March 24, 2006
    Date of Patent: December 7, 2010
    Assignee: Pioneer Corporation
    Inventors: Seiro Oshima, Masataka Yamaguchi, Toshihiko Takishita, Takao Tagiri
  • Patent number: 7524612
    Abstract: An information recording medium has an excellent jitter characteristic with a considerable difference in reflectance between prior to and subsequent to recording. The information recording medium includes a recording layer which contains a material having a reflectance which varies by irradiation of a light beam, on which information is recorded as reflectance variations, and a substrate for supporting the recording layer, the recording layer including a metal nitride as a major component.
    Type: Grant
    Filed: May 23, 2003
    Date of Patent: April 28, 2009
    Assignee: Pioneer Corporation
    Inventors: Yasuo Hosoda, Ayumi Mitsumori, Megumi Sato, Masataka Yamaguchi, Tomoaki Izumi, Satoshi Jinno, Yoichi Okumura
  • Publication number: 20060256703
    Abstract: An optical-recording medium is provided with at least a first recording layer for recording information optically; and a second recording layer for recording information optically by a light beam that passes through said first recording layer; wherein the track pitch of a recording track that is formed on said second recording layer is narrower than the track pitch of a recording track that is formed on said first recording layer.
    Type: Application
    Filed: March 24, 2006
    Publication date: November 16, 2006
    Inventors: Seiro Oshima, Masataka Yamaguchi, Toshihiko Takishita, Takao Tagiri
  • Patent number: 7037565
    Abstract: An optical recording medium records information so that a recording density of a first recording layer 11 at the most distant part from a incidence plane of laser beam is higher than that of a second recording layer 13 at the incidence plane side.
    Type: Grant
    Filed: May 16, 2003
    Date of Patent: May 2, 2006
    Assignee: Pioneer Corporation
    Inventor: Masataka Yamaguchi
  • Patent number: 7018694
    Abstract: An optical recording medium includes a recording layer containing an alloy represented by a general formula: (TixM1x)yM2y, where element M1 is Si or Al, element M2 is an element selected from the group consisting of Si, Al and Fe and different from the element M1, x is equal to or larger than 0.3 and equal to or smaller than 0.8, and y is equal to or larger than 0.75 and equal to or smaller than 1. The thus constituted optical recording medium only places minimal load on the global environment.
    Type: Grant
    Filed: March 22, 2004
    Date of Patent: March 28, 2006
    Assignees: TDK Corporation, Pioneer Corporation
    Inventors: Yasuo Hosoda, Ayumi Mitsumori, Megumi Sato, Masataka Yamaguchi, Tetsuya Iida, Hiroyasu Inoue, Koji Mishima, Masaki Aoshima
  • Publication number: 20050233247
    Abstract: An information recording medium has an excellent jitter characteristic with a considerable difference in reflectance between prior to and subsequent to recording. The information recording medium includes a recording layer which contains a material having a reflectance which varies by irradiation of a light beam, on which information is recorded as reflectance variations, and a substrate for supporting the recording layer, the recording layer including a metal nitride as a major component.
    Type: Application
    Filed: May 23, 2003
    Publication date: October 20, 2005
    Inventors: Yasuo Hosoda, Ayumi Mitsumori, Megumi Sato, Masataka Yamaguchi, Tomoaki Izumi, Satoshi Jinno, Yoichi Okumura
  • Publication number: 20050213480
    Abstract: An optical disk with multi-layered structure provided with at least two recording layers is provided. In respective recording layers, tracks are formed, and the track is formed such that the amount of eccentricity is different in respective recording layers. In the method for identifying the recording layer which identifies the recording layer of the optical disk, the recording layer is identified by detecting the amount of the eccentricity set to the track of the respective recording layers.
    Type: Application
    Filed: March 22, 2005
    Publication date: September 29, 2005
    Inventors: Nobuki Yamaoka, Toshihiko Takishita, Seiro Oshima, Atsushi Kondo, Masataka Yamaguchi, Takao Tagiri
  • Patent number: 6929840
    Abstract: An optical recording medium includes a recording layer containing as a primary component an alloy containing at least two elements selected from the group consisting of Fe, Al and Si and the alloy contained in the recording layer as a primary component has a composition [x1, y1, z1] in terms of the ternary composition diagram that falls within a region of a pentagon defined by straight lines connecting points [57, 43, 0], [0, 55, 45], [15, 0, 85], [89, 11, 0] and [0, 16, 84] in the ternary composition diagram. According to the thus configured optical recording medium, only minimal load is placed on the global environment.
    Type: Grant
    Filed: March 22, 2004
    Date of Patent: August 16, 2005
    Assignees: TDK Corporation, Pioneer Corporation
    Inventors: Yasuo Hosoda, Ayumi Mitsumori, Megumi Sato, Masataka Yamaguchi, Tetsuya Iida, Hiroyasu Inoue, Koji Mishima, Masaki Aoshima
  • Patent number: 6906995
    Abstract: A stack “0” having a recording layer serving to transmit a light beam includes a heat dissipating layer, a reflective layer, an enhanced layer, and the recording layer, which are formed in that order on an intermediate layer. The reflective layer is translucent to a light beam, while the heat dissipating layer has a thermal conductivity higher than that of the intermediate layer as well as a refractive index higher than or equal to that of the intermediate layer and less than or equal to a refractive index 3. The thickness of the heat dissipating layer is set to a value within the range of a predetermined condition defined in accordance with a refractive index, the wavelength of the light beam, and a given integer. Thus, an information read/write medium configured to enable information to be recorded/reproduced thereon/therefrom as well as to effectively cool a recording layer serving to transmit a light beam is provided.
    Type: Grant
    Filed: June 23, 2003
    Date of Patent: June 14, 2005
    Assignee: Pioneer Corporation
    Inventors: Takahiro Togashi, Masataka Yamaguchi, Yoichi Okumura
  • Publication number: 20040190435
    Abstract: An optical recording medium includes a recording layer containing an alloy represented by a general formula: (TixM11-x)yM21-y, where element M1 is Si or Al, element M2 is an element selected from the group consisting of Si, Al and Fe and different from the element M1, x is equal to or larger than 0.3 and equal to or smaller than 0.8, and y is equal to or larger than 0.75 and equal to or smaller than 1.
    Type: Application
    Filed: March 22, 2004
    Publication date: September 30, 2004
    Applicants: TDK Corporation, Pioneer Corporation
    Inventors: Yasuo Hosoda, Ayumi Mitsumori, Megumi Sato, Masataka Yamaguchi, Tetsuya Iida, Hiroyasu Inoue, Koji Mishima, Masaki Aoshima
  • Publication number: 20040191462
    Abstract: An optical recording medium includes a recording layer containing as a primary component an alloy containing at least two elements selected from the group consisting of Fe, Al and Si and the alloy contained in the recording layer as a primary component has a composition [x1, y1, z1] in terms of the ternary composition diagram that falls within a region of a pentagon defined by straight lines connecting points [57, 43, 0], [0, 55, 45], [15, 0, 85], [89, 11, 0] and [0, 16, 84] in the ternary composition diagram.
    Type: Application
    Filed: March 22, 2004
    Publication date: September 30, 2004
    Applicants: TDK Corporation, Pioneer Corporation
    Inventors: Yasuo Hosoda, Ayumi Mitsumori, Megumi Sato, Masataka Yamaguchi, Tetsuya Iida, Hiroyasu Inoue, Koji Mishima, Masaki Aoshima
  • Patent number: 6724716
    Abstract: An information recording medium has a light transmissive layer, a first information recording layer, a transparent layer, and a second information recording layer sequentially stacked to reproduce information signals upon exposure of the light transmissive layer to laser light, wherein the first information recording layer comprises a first protective layer, a phase change recording film, and a second protective layer sequentially from the light transmissive layer, and the rate of power fluctuation between a reproducing light passing through a recorded region of the first information recording layer and that passing through an unrecorded region of the first information recording layer during reproduction of the information signals from the second information recording layer, are within 10%, whereby the information signals can be recorded/reproduced on/from the second information recording layer through the first information recording layer satisfactorily.
    Type: Grant
    Filed: January 31, 2002
    Date of Patent: April 20, 2004
    Assignee: Pioneer Corporation
    Inventors: Masataka Yamaguchi, Takahiro Togashi, Yoichi Okumura
  • Publication number: 20040033328
    Abstract: An optical recording medium records information so that a recording density of a first recording layer 11 at the most distant part from a incidence plane of laser beam is higher than that of a second recording layer 13 at the incidence plane side.
    Type: Application
    Filed: May 16, 2003
    Publication date: February 19, 2004
    Applicant: PIONEER CORPORATION
    Inventor: Masataka Yamaguchi
  • Publication number: 20040004300
    Abstract: A stamper having a good cost performance, which can be easily separated (released) from a layer of photo-curing resin, is provided. A process for producing an optical multi-layer recording medium having a good productivity is also provided by using such a stamper. The process for producing an optical multi-layer recording medium includes the steps of: laminating a layer of non-cured photo-curing resin and a transparent stamper made of amorphous polyolefin resin in this sequence on a substrate; curing the non-cured photo-curing resin with light permeated through the transparent stamper; and removing the transparent stamper.
    Type: Application
    Filed: May 29, 2003
    Publication date: January 8, 2004
    Applicant: PIONEER CORPORATION
    Inventors: Masataka Yamaguchi, Shinichi Hanzawa, Toshihiko Takishita
  • Publication number: 20040001424
    Abstract: A stack “0” having a recording layer serving to transmit a light beam includes a heat dissipating layer, a reflective layer, an enhanced layer, and the recording layer, which are formed in that order on an intermediate layer. The reflective layer is translucent to a light beam, while the heat dissipating layer has a thermal conductivity higher than that of the intermediate layer as well as a refractive index higher than or equal to that of the intermediate layer and less than or equal to a refractive index 3. The thickness of the heat dissipating layer is set to a value within the range of a predetermined condition defined in accordance with a refractive index, the wavelength of the light beam, and a given integer. Thus, an information read/write medium configured to enable information to be recorded/reproduced thereon/therefrom as well as to effectively cool a recording layer serving to transmit a light beam is provided.
    Type: Application
    Filed: June 23, 2003
    Publication date: January 1, 2004
    Inventors: Takahiro Togashi, Masataka Yamaguchi, Yoichi Okumura
  • Publication number: 20030235655
    Abstract: A multi-layer optical recording medium includes a light transmissive intermediate layer. This intermediate layer is formed by at least two times of laminating steps. The recording medium has smaller bending, and the intermediate layer has uniform thickness.
    Type: Application
    Filed: August 26, 2002
    Publication date: December 25, 2003
    Applicant: Pioneer Corporation
    Inventors: Takanori Mitsuhata, Yoichi Okumura, Takahiro Togashi, Masataka Yamaguchi, Hideo Kudo, Shinichi Hanzawa, Toshihiki Takishita
  • Publication number: 20020146875
    Abstract: An information recording medium has a light transmissive layer, a first information recording layer, a transparent layer, and a second information recording layer sequentially stacked to reproduce information signals upon exposure of the light transmissive layer to laser light, wherein the first information recording layer comprises a first protective layer, a phase change recording film, and a second protective layer sequentially from the light transmissive layer, and the rate of power fluctuation between a reproducing light passing through a recorded region of the first information recording layer and that passing through an unrecorded region of the first information recording layer during reproduction of the information signals from the second information recording layer, are within 10%, whereby the information signals can be recorded/reproduced on/from the second information recording layer through the first information recording layer satisfactorily.
    Type: Application
    Filed: January 31, 2002
    Publication date: October 10, 2002
    Applicant: PIONEER CORPORATION
    Inventors: Masataka Yamaguchi, Takahiro Togashi, Yoichi Okumura
  • Patent number: 5990605
    Abstract: An electron emission device includes: a semiconductor layer; a porous semiconductor; and a thin-film metal electrode which are layered in turn. The electrode faces a vacuum space. The porous semiconductor layer has at least two or more of porosity-changed layers which have porosities which are different from each other in the thickness direction. The electron emission device emits electrons when an electric field is applied between the semiconductor layer and the thin-film metal electrode. An insulator layer made of a material selected from silicon oxide or silicon nitride may be formed between the porous semiconductor layer and the thin-film metal electrode. Si skeletons of the porous semiconductor layer are oxidized or nitrided.
    Type: Grant
    Filed: March 20, 1998
    Date of Patent: November 23, 1999
    Assignee: Pioneer Electronic Corporation
    Inventors: Takamasa Yoshikawa, Kiyohide Ogasawara, Hiroshi Ito, Masataka Yamaguchi, Shingo Iwasaki, Nobuyasu Negishi, Takashi Chuman