Patents by Inventor Akira Nakagawa

Akira Nakagawa 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).

  • Patent number: 9237342
    Abstract: A method includes determining a group to which each of a plurality of blocks belongs, the plurality of blocks being obtained by dividing each picture included in video image data; adding, to an output stream, group information expressing the group to which each of the plurality of blocks belongs; calculating an output time for each of the groups; determining output delay for each of the groups; adding, to the output stream, an output delay time from a decode time of each of the groups; controlling an encode amount so that data used for outputting all of the blocks included in one of the groups arrives at a decoding buffer of a decoding device and decoding is completed by an output time expressed by the output delay time; and performing encoding based on the encode amount that has been controlled.
    Type: Grant
    Filed: April 10, 2013
    Date of Patent: January 12, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Junpei Koyama, Kimihiko Kazui, Satoshi Shimada, Akira Nakagawa
  • Publication number: 20150365677
    Abstract: When a prediction is made between fields with different parity, the predicative efficiency of a chrominance vector is improved by adaptively switching the generation of a chrominance motion vector depending on encoding/decoding field parity (top/bottom) and a reference field parity (top/bottom), and the coding efficiency is improved accordingly.
    Type: Application
    Filed: August 24, 2015
    Publication date: December 17, 2015
    Applicant: FUJITSU LIMITED
    Inventors: Akira NAKAGAWA, Hidenobu MIYOSHI
  • Patent number: 9204154
    Abstract: A encoding device includes a boundary pixel prediction value generation unit, boundary pixel prediction error estimation unit, and a quantized coefficient encoding unit. The boundary pixel prediction value generation unit generates a boundary pixel prediction value as a prediction value of a boundary pixel adjacent to an encoded block in the encoding block from a locally decoded image of a plurality of encoded blocks adjacent to the encoding block. The boundary pixel prediction error estimation unit generates boundary pixel prediction error estimation information from the boundary pixel prediction value and the encoding block prediction image with respect to the boundary pixel. The quantized coefficient encoding unit generates encoding block entropy encoded data from the quantized coefficients and the boundary pixel prediction error estimation information.
    Type: Grant
    Filed: August 9, 2012
    Date of Patent: December 1, 2015
    Assignee: FUJITSU LIMITED
    Inventors: Akira Nakagawa, Kimihiko Kazui, Hidenobu Miyoshi, Junpei Koyama
  • Patent number: 9191676
    Abstract: A video decoding apparatus according to one aspect of the disclosure performs a decoding process, on a process block basis, using a motion vector of the process block and prediction information candidates of the motion vector.
    Type: Grant
    Filed: September 12, 2012
    Date of Patent: November 17, 2015
    Assignee: FUJITSU LIMITED
    Inventors: Satoshi Shimada, Kimihiko Kazui, Junpei Koyama, Akira Nakagawa
  • Publication number: 20150255305
    Abstract: In a plasma etching method for forming a hole in an etching target film, a process of generating a plasma of a processing gas containing at least CxFy gas and a rare gas having a mass smaller than a mass of Ar gas into the processing chamber in the processing chamber by switching on a high frequency power application unit under a first condition and a process of extinguishing the plasma of the processing gas in the processing chamber by switching off the high frequency power application unit under a second condition are alternately repeated. A negative DC voltage from a DC power supply is applied such that an absolute value of the negative DC voltage of the second condition becomes greater than an absolute value of the negative DC voltage of the first condition.
    Type: Application
    Filed: March 4, 2015
    Publication date: September 10, 2015
    Applicant: TOKYO ELECTRON LIMITED
    Inventor: Akira NAKAGAWA
  • Patent number: 9124886
    Abstract: When a prediction is made between fields with different parity, the predicative efficiency of a chrominance vector is improved by adaptively switching the generation of a chrominance motion vector depending on a encoding/decoding field parity (top/bottom) and a reference field parity (top/bottom), and the coding efficiency is improved accordingly.
    Type: Grant
    Filed: March 3, 2005
    Date of Patent: September 1, 2015
    Assignee: FUJITSU LIMITED
    Inventors: Akira Nakagawa, Hidenobu Miyoshi
  • Publication number: 20150243521
    Abstract: A main etching process of forming a recess portion in a multilayer film having a laminated film where a first film and a second film having different relative permitivities are alternately formed on a base silicon film to a preset depth and an over etching process of forming the recess portion until the base silicon film is exposed are performed by introducing a processing gas including a CF-based gas and an oxygen gas and by performing a plasma etching process. In the over etching process, a first over etching process where a flow rate ratio of the oxygen gas to the CF-based gas is increased as compared to the main etching process and a second over etching process where the flow rate ratio of the oxygen gas to the CF-based gas is reduced as compared to the first over etching process are repeatedly performed two or more times.
    Type: Application
    Filed: October 31, 2013
    Publication date: August 27, 2015
    Inventors: Kazuto Ogawa, Akira Nakagawa, Hideki Konishi
  • Patent number: 9094687
    Abstract: A video encoder includes: a motion compensation signal generator to generate a plurality of motion compensation signals in accordance with an encoding target signal and a plurality of reference pictures; a prediction signal generator to generate a prediction signal of the encoding target signal by utilizing the plurality of motion compensation signals; a prediction error signal generator to generate a prediction error signal; a selector to select, from among a plurality of generation rules for generating encoded information of the prediction error signal, a generation rule that is expected to reduce an information amount of an encoded state of the prediction error signal, in accordance with the plurality of motion compensation signals; and an encoded information generator to generate encoded information of the prediction error signal in accordance with the generation rule selected by the selector.
    Type: Grant
    Filed: June 22, 2012
    Date of Patent: July 28, 2015
    Assignee: FUJITSU LIMITED
    Inventors: Junpei Koyama, Akira Nakagawa
  • Patent number: 9094683
    Abstract: A method includes extracting a first vector used to code a specific block belonging to a coded field picture arranged chronologically adjacent to a field picture to be coded and to a block to be coded, generating a second vector by scaling the first vector based on a temporal distance between the field picture and a second picture specified by a reference index and referenced for the block and included in the field picture and a temporal distance between a first picture pointed by the first vector and the coded field picture arranged chronologically adjacent to the field picture, and correcting the second vector based on a parity of the field picture, a parity of the first picture, a parity of the second picture and a parity of the coded field picture and forming the corrected second vector.
    Type: Grant
    Filed: September 4, 2012
    Date of Patent: July 28, 2015
    Assignee: FUJITSU LIMITED
    Inventors: Junpei Koyama, Akihiro Yamori, Kimihiko Kazui, Satoshi Shimada, Akira Nakagawa
  • Publication number: 20150208085
    Abstract: A video decoding apparatus includes a reference picture list storing unit configured to store picture information of pictures; a motion vector information storing unit configured to store motion vector information including motion vectors of blocks that are spatially and temporally adjacent to a target block to be decoded and reference picture identifiers indicating pictures that the motion vectors refer to; and a vector predictor generating unit configured to scale a vector predictor candidate for a motion vector of the target block based on the picture information and the motion vector information and to correct the scaled vector predictor candidate toward 0 by a predetermined amount.
    Type: Application
    Filed: March 13, 2015
    Publication date: July 23, 2015
    Applicant: FUJITSU LIMITED
    Inventors: Satoshi Shimada, Akira Nakagawa, Kimihiko Kazui, Junpei Koyama
  • Patent number: 9083944
    Abstract: An encoding apparatus encodes image data using a picture order count (POC) that indicates a display order of a picture. The encoding apparatus includes a remainder calculating unit that calculates a remainder by dividing an absolute frame number counted from an instantaneous decoding refresh (IDR) picture by a divisor which is a number of reference frames in one POC cycle, and a remainder code converting unit that coverts the remainder calculated by the remainder calculating unit into a code. A decoding apparatus decodes image data using the POC. The decoding apparatus includes a remainder extracting unit that, when random access decoding is performed, extracts a remainder by decoding a remainder code added to a picture at a random decoding start position, and an initializing unit that initializes an input value of a decoding process for the POC, by using the remainder extracted by the remainder extracting unit.
    Type: Grant
    Filed: November 24, 2008
    Date of Patent: July 14, 2015
    Assignee: FUJITSU LIMITED
    Inventors: Shunsuke Kobayashi, Akira Nakagawa, Lalitha Bhavani Susarla
  • Patent number: 9078006
    Abstract: A video encoder includes: a motion compensation picture signal generator that generates a plurality of motion compensation picture signals in accordance with an encoding target signal and a plurality of reference pictures; a prediction signal generator that generates a prediction signal of the encoding target signal using the motion compensation picture signals; a prediction error signal generator that generates a prediction error signal representing a difference between the encoding target signal and the prediction signal; a selector that selects an entropy code assignment rule that is expected to minimize an information amount of an encoded state of the prediction error signal from a plurality of entropy code assignment rules for encoding the prediction error signal in accordance with the motion compensation picture signals; and an entropy encoder that generates encoded information from the prediction error signal in accordance with the selected entropy code assignment rule.
    Type: Grant
    Filed: July 3, 2012
    Date of Patent: July 7, 2015
    Assignee: FUJITSU LIMITED
    Inventors: Hidenobu Miyoshi, Akira Nakagawa
  • Publication number: 20150189313
    Abstract: A video decoding apparatus includes a reference picture list storing unit configured to store picture information of pictures; a motion vector information storing unit configured to store motion vector information including motion vectors of blocks that are spatially and temporally adjacent to a target block to be decoded and reference picture identifiers indicating pictures that the motion vectors refer to; and a vector predictor generating unit configured to scale a vector predictor candidate for a motion vector of the target block based on the picture information and the motion vector information and to correct the scaled vector predictor candidate toward 0 by a predetermined amount.
    Type: Application
    Filed: March 13, 2015
    Publication date: July 2, 2015
    Applicant: FUJITSU LIMITED
    Inventors: Satoshi SHIMADA, Akira Nakagawa, Kimihiko Kazui, Junpei Koyama
  • Publication number: 20150189312
    Abstract: A video decoding apparatus includes a reference picture list storing unit configured to store picture information of pictures; a motion vector information storing unit configured to store motion vector information including motion vectors of blocks that are spatially and temporally adjacent to a target block to be decoded and reference picture identifiers indicating pictures that the motion vectors refer to; and a vector predictor generating unit configured to scale a vector predictor candidate for a motion vector of the target block based on the picture information and the motion vector information and to correct the scaled vector predictor candidate toward 0 by a predetermined amount.
    Type: Application
    Filed: March 13, 2015
    Publication date: July 2, 2015
    Applicant: FUJITSU LIMITED
    Inventors: Satoshi SHIMADA, Akira Nakagawa, Kimihiko Kazui, Junpei Koyama
  • Patent number: 9071836
    Abstract: An image processing apparatus includes a predictive picture generator configured to generate a predictive picture for an encoding target block based on pixel values of pixels included in already-encoded blocks around the encoding target block, a predictive error generator configured to generate predictive error based on a picture expressed by the encoding target block and a weighting unit configured to apply weights to pixel values by conducting a multiplication that multiplies by a constant greater than 1 the pixel values of pixels used to generate a predictive picture for another encoding target block, the pixels being pixels from among a plurality of pixels included in predictive error generated by the predictive error generator.
    Type: Grant
    Filed: March 15, 2011
    Date of Patent: June 30, 2015
    Assignee: FUJITSU LIMITED
    Inventor: Akira Nakagawa
  • Patent number: 9055302
    Abstract: A video encoder includes: a motion compensation picture signal generator to generate a plurality of motion compensation picture signals in accordance with an encoding target signal and a plurality of reference pictures; a prediction signal generator to generate a prediction signal of the encoding target signal by utilizing the plurality of motion compensation picture signals; a prediction error signal generator to generate a prediction error signal; a selector to select, from among a plurality of scan patterns prepared for generating encoded information from the prediction error signal, a scan pattern that is expected to minimize an information amount of an encoded state of the prediction error signal, in accordance with the plurality of motion compensation picture signals; and a zigzag scanner to generate encoded information from the prediction error signal by using the scan pattern selected by the selector.
    Type: Grant
    Filed: June 22, 2012
    Date of Patent: June 9, 2015
    Assignee: FUJITSU LIMITED
    Inventors: Hidenobu Miyoshi, Akira Nakagawa
  • Patent number: 9039909
    Abstract: There is provided a plasma etching method for forming a hole in a silicon oxide film formed on an etching stopper layer. The plasma etching method includes a main etching process for etching the silicon oxide film; and an etching process that is performed when at least a part of the etching stopper layer is exposed after the main etching process. The etching process includes a first etching process using a gaseous mixture of a C4F6 gas, an Ar gas and an O2 gas as the processing gas; and a second etching process using a gaseous mixture of a C4F8 gas, an Ar gas and an O2 gas or a gaseous mixture of a C3F8 gas, an Ar gas and an O2 gas as the processing gas. The first etching process and the second etching process are alternately performed plural times.
    Type: Grant
    Filed: February 27, 2012
    Date of Patent: May 26, 2015
    Assignee: TOKYO ELECTRON LIMITED
    Inventors: Akira Nakagawa, Yuji Otsuka
  • Patent number: 9034198
    Abstract: A plasma etching method using a plasma etching apparatus including a lower electrode and an upper electrode is provided. The plasma etching method includes a first etching step of performing plasma etching using a first process gas and a second etching step of performing the plasma etching using a second process gas. The adhesion of a radical of the second process gas to an object of processing is less than the adhesion of a radical of the first process gas to the object of processing. While alternately repeating a first condition of turning on high-frequency electric power for plasma generation and a second condition of turning off the high-frequency electric power, the second etching step applies a negative direct-current voltage to the upper electrode so that the absolute value of the applied voltage is greater in a period of the second condition than in a period of the first condition.
    Type: Grant
    Filed: July 30, 2012
    Date of Patent: May 19, 2015
    Assignee: TOKYO ELECTRON LIMITED
    Inventors: Akira Nakagawa, Fumio Yamazaki, Hiromi Mochizuki
  • Patent number: 9023771
    Abstract: [Object] To provide a nanoparticle-containing lubricating oil composition which demonstrates a low friction coefficient and realizes a further fuel economy. [Solving Means] A nanoparticle-containing lubricating oil composition comprising a base oil, an additive having hydroxyl group, and nanoparticle. A nanoparticle-containing lubricating oil composition comprising a base oil, an ashless friction modifier having hydroxyl group, and nanoparticle. A nanoparticle-containing lubricating oil composition comprising a base oil, an additive having hydroxyl group, and nanoparticle having a particle diameter of 1 to 100 nm. A nanoparticle-containing lubricating oil composition comprising a base oil, an ashless friction modifier having hydroxyl group, and nanoparticle having a particle diameter of 1 to 100 nm.
    Type: Grant
    Filed: July 27, 2006
    Date of Patent: May 5, 2015
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Yutaka Mabuchi, Akira Nakagawa
  • Patent number: 9001894
    Abstract: When a prediction is made between fields with different parity, the predicative efficiency of a chrominance vector is improved by adaptively switching the generation of a chrominance motion vector depending on a encoding/decoding field parity (top/bottom) and a reference field parity (top/bottom), and the coding efficiency is improved accordingly.
    Type: Grant
    Filed: March 30, 2007
    Date of Patent: April 7, 2015
    Assignee: Fujitsu Limited
    Inventors: Akira Nakagawa, Hidenobu Miyoshi