Patents by Inventor Yuki Maruyama

Yuki Maruyama 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: 7826980
    Abstract: A sensitivity of a cumulative chemical/physical phenomenon detecting apparatus is improved. Prior to transferring charges at a sensing section to a floating diffusion section, the charges remaining at the sensing section are removed from the sensing section by a potential barrier formed between the sensing section and a charge injection adjusting section.
    Type: Grant
    Filed: March 13, 2006
    Date of Patent: November 2, 2010
    Assignee: National University Corporation Toyohashi University of Technology
    Inventors: Kazuaki Sawada, Takeshi Hizawa, Junichi Matsuo, Yuki Maruyama
  • Publication number: 20100202513
    Abstract: Video signal coding apparatus includes: a quantization unit which quantizes, using coefficient values in a first quantization matrix, a luminance signal of each of a first picture and a second picture coded after the first picture, and quantizes, using coefficient values in a second quantization matrix, a chrominance signal of each of the first picture and the second picture; a code amount obtainment unit which obtains a luminance code amount and a chrominance code amount of each of the first picture and the second picture; a rate calculation unit which calculates a rate of the chrominance code amount with respect to the luminance code amount for each of the first picture and the second picture, obtained by the code amount obtainment unit; and a rate control unit which changes a coefficient value of at least one of the first matrix and the second matrix used in quantizing the second picture, before the quantization unit quantizes the second picture, so that the rate for the second picture becomes smaller than
    Type: Application
    Filed: February 4, 2010
    Publication date: August 12, 2010
    Inventors: Hiroshi Arakawa, Yuki Maruyama, Hideyuki Ohgose, Kiyofumi Abe
  • Publication number: 20100033594
    Abstract: An image coding apparatus including: a reference index assignment unit configured to assign reference indices to plural reference pictures which can be referred to by a current picture to be coded, each of the reference indices having a different value and being assigned to a corresponding one of the plural reference pictures; and an image coding unit configured to perform field-coding on the current picture to be coded, by referring to the reference pictures indicated by the reference indices assigned by the reference index assignment unit, and to code the reference indices, wherein the reference index assignment unit is configured to assign, to one of two reference pictures included in the plural reference pictures, a reference index having a value smaller than a value of a reference index to be assigned to the other reference picture, the one of the two reference pictures being temporally closer to the current picture to be coded than the other reference picture.
    Type: Application
    Filed: August 4, 2009
    Publication date: February 11, 2010
    Inventor: Yuki MARUYAMA
  • Publication number: 20100026829
    Abstract: An image coding apparatus which compression-codes moving picture data including a current image to be coded, the image coding apparatus including an accumulating unit which accumulates a reference image, a predicted image generating unit which generates a predicted image of the current image to be coded, based on the reference image accumulated in the accumulating unit, by performing motion compensation with weighted prediction or motion compensation without the weighted prediction, the weighted prediction being a process of adding a predetermined offset value to a pixel value of the reference image, a coding unit which codes a difference between the predicted image generated by the predicted image generating unit and the current image to be coded, and a determining unit which determines whether or not the current image to be coded is included in, among the moving picture data, a picture group which is a group of successive pictures and indicates motion equal to or larger than a predetermined amount of motion
    Type: Application
    Filed: July 28, 2009
    Publication date: February 4, 2010
    Inventor: Yuki Maruyama
  • Publication number: 20090245350
    Abstract: To provide an image coding apparatus and an image coding method for reliably suppressing delays in image coding processing while suppressing increases in circuit size. An image coding apparatus (100) includes: an image coding unit (101) which generates a coded picture by sequentially coding a plurality of input pictures; a skipped picture generation unit (104) which generates a skipped picture; an entropy coding unit (102) which performs entropy coding on the coded picture and the skipped picture; and a coding control unit (103) which determines whether or not entropy coding has generated a coded picture including a macroblock having a code amount exceeding a threshold value, and which causes the skipped picture generation unit (104) to generate a skipped picture based on a specific picture that is one of the plurality of input pictures that corresponds to the coded picture, without causing the image coding unit (101) to perform coding.
    Type: Application
    Filed: June 14, 2007
    Publication date: October 1, 2009
    Applicant: PANASONIC CORPORATION
    Inventors: Yuki Maruyama, Hiroshi Arakawa, Hideyuki Ohgose, Takahiro Nishi
  • Publication number: 20090103618
    Abstract: The picture coding apparatus includes: a picture feature amount extracting unit which extracts respective feature amounts of the current picture and a picture having a specific relationship with the current picture; a correlation degree calculating unit which calculates, based on the feature amount extracted by the feature amount extracting unit, a correlation degree indicating a degree of image similarity between the current picture and the picture having a specific relationship with the current picture; a picture type determining unit which determines, depending on the calculated correlation degree, a picture type for the current picture, from two picture types on which different inter-picture prediction is performed; and a coding unit which codes the current picture according to the determined picture type.
    Type: Application
    Filed: October 16, 2008
    Publication date: April 23, 2009
    Inventors: Koji Arimura, Yuki Maruyama, Hideyuki Ohgose
  • Publication number: 20090010322
    Abstract: The picture coding apparatus, which optimizes data amount of coded picture data without entailing an increase in circuit size and/or power consumption, includes: a picture input unit which obtains a moving picture signal Vin; a buffer; a lead detecting unit which detects a lead portion from the moving picture represented by the moving picture signal Vin; a coding unit which codes the moving picture signal Vin in the lead portion detected by the lead detecting unit, according to a coding condition for temporary coding; and a coding condition generating unit which generates a coding condition for actual coding, based on the result of the coding by the coding unit and the coding condition for temporary coding. Then, coding unit codes the moving picture signal Vin representing the moving picture including the aforementioned lead portion, according to the coding condition for actual coding.
    Type: Application
    Filed: November 29, 2007
    Publication date: January 8, 2009
    Inventors: Tatsuro Juri, Hiroshi Arakawa, Katsuo Saigo, Hideyuki Ohgose, Koji Arimura, Kei Tasaka, Yuki Maruyama
  • Publication number: 20080317377
    Abstract: The image coding apparatus according to the present invention is an image coding apparatus, including an imaging unit, a chroma quantization width adjustment unit configured to determine a chroma quantization width using a first method when the amount of the incident light on the imaging unit is larger than the predetermined amount, and to adjust the chroma quantization width such that the chroma quantization width is larger than a quantization width determined using the first method when the light amount judging unit judges that the amount of the incident light is smaller than the predetermined amount, and a luma quantization width adjustment unit configured to determine a luma quantization width using a second method without being dependent on the amount of the incident light.
    Type: Application
    Filed: June 19, 2008
    Publication date: December 25, 2008
    Inventors: Katsuo SAIGO, Tatsuro Juri, Hideyuki Ohgose, Koji Arimura, Hiroshi Arakawa, Kei Tasaka, Yuki Maruyama
  • Patent number: 7465915
    Abstract: A method for measuring incident light employing a simple semiconductor structure provided with a single electron-capturing section corresponding to incident light, and a sensor having a spectroscopic mechanism employing the same are provided. A spectroscopic sensor includes a semiconductor substrate (1), a first diffusion layer (2) provided on the semiconductor substrate (1), a second diffusion layer (3)provided at a part of the first diffusion layer (2), and an electrode (7)film provided on the first diffusion layer (2) with an insulating film (4) provided therebetween, the electrode film (7) transmitting the incident light and being applied with a gate voltage. In the spectroscopic sensor, the gate voltage is varied, the depth (position) for capturing electrons generated in the first diffusion layer (2) by the incident light is varied so as to correspond to the gate voltage, and a current indicating the quantity of the electrons is measured.
    Type: Grant
    Filed: March 25, 2004
    Date of Patent: December 16, 2008
    Assignee: Japan Science and Technology Agency
    Inventors: Kazuaki Sawada, Makoto Ishida, Yuki Maruyama, Hideki Muto
  • Publication number: 20080231253
    Abstract: A sensitivity of a cumulative chemical/physical phenomenon detecting apparatus is improved. Prior to transferring charges at a sensing section to a floating diffusion section, the charges remaining at the sensing section are removed from the sensing section by a potential barrier formed between the sensing section and a charge injection adjusting section.
    Type: Application
    Filed: March 13, 2006
    Publication date: September 25, 2008
    Inventors: Kazuaki Sawada, Takeshi Hizawa, Junichi Matsuo, Yuki Maruyama
  • Publication number: 20080199090
    Abstract: A coding method conversion apparatus converts the first coded data coded by the first coding method into the second coded data. The coding method conversion apparatus includes: an H.264 decoder which decodes the first coded data; a deblocking filter strength calculation unit which calculates a filter strength of deblocking filtering of a second coding method, using at least one piece of decoding information except a coding type of the first coded data, the decoding information being obtained by decoding the first coded data; and a deblocking filter which performs the deblocking filtering to reduce noise in a boundary of blocks according to the filter strength calculated by the deblocking filter strength calculation unit.
    Type: Application
    Filed: February 14, 2008
    Publication date: August 21, 2008
    Inventors: Kei TASAKA, Tatsuro JURI, Katsuo SAIGO, Hideyuki OHGOSE, Koji ARIMURA, Hiroshi ARAKAWA, Yuki MARUYAMA
  • Publication number: 20080151996
    Abstract: The moving picture coding apparatus according to the present invention includes: a decoding unit 10 which decodes an MPEG2 stream; a coding parameter extracting unit 11 which extracts a coding parameter of MPEG2 from the MPEG stream; a re-coding parameter determining unit 12 which judges, based on the coding parameter of MPEG2 extracted by the coding parameter extracting unit 11, the degree of correlation between image data coded in MPEG2 and its reference picture and determines a coding parameter of H.264 based on the result of the judgment; and a coding unit 13 which codes, in H.264, the image data decoded by the decoding unit 10, using the coding parameter of H.264 determined by the re-coding parameter determining unit 12.
    Type: Application
    Filed: December 12, 2007
    Publication date: June 26, 2008
    Inventors: Koji ARIMURA, Tatsuro Juri, Hideyuki Ohgose, Katsuo Saigo, Hiroshi Arakawa, Kei Tasaka, Yuki Maruyama
  • Publication number: 20080152012
    Abstract: Provided is a moving picture coding device and a moving picture coding method used by the device, which can prevent a search range of reference pictures from being unnecessarily extended when the first coding method is converted into the second coding method.
    Type: Application
    Filed: December 19, 2007
    Publication date: June 26, 2008
    Inventors: Hideyuki OHGOSE, Tatsuro Juri, Hiroshi Arakawa, Katsuo Saigo, Koji Arimura, Yuki Maruyama, Kei Tasaka
  • Publication number: 20080128592
    Abstract: In a photosensor for composing pixels of an image sensor, a wide dynamic range having self-suppression action in the sensor unit in every pixel is realized. The photosensor includes a semiconductor substrate, a first electrode film formed on the semiconductor substrate, an insulator film being between the semiconductor substrate and the first electrode film, passing an incident light and receiving a gate voltage, and a first diffusion layer adjacent to the first electrode film, in which the first electrode film and the first diffusion layer are connected by wiring.
    Type: Application
    Filed: December 20, 2005
    Publication date: June 5, 2008
    Inventors: Kazuaki Sawada, Yuki Maruyama
  • Publication number: 20080018959
    Abstract: charge generated by the incident light is accumulated in a charge accumulation well in the semiconductor substrate immediately beneath the first electrode film when the gate voltage applied to the first electrode film is a first gate voltage, and the accumulated charge is amplified when the gate voltage is a second gate voltage.
    Type: Application
    Filed: December 20, 2005
    Publication date: January 24, 2008
    Inventors: Kazuaki Sawada, Yuki Maruyama
  • Publication number: 20060244089
    Abstract: A method for measuring incident light employing a simple semiconductor structure provided with a single electron-capturing section corresponding to incident light, and a sensor having a spectroscopic mechanism employing the same are provided. A spectroscopic sensor includes a semiconductor substrate (1), a first diffusion layer (2) provided on the semiconductor substrate (1), a second diffusion layer (3) provided at a part of the first diffusion layer (2), and an electrode film (7) provided on the first diffusion layer (2) with an insulating film (4) provided therebetween, the electrode film (7) transmitting the incident light and being applied with a gate voltage. In the spectroscopic sensor, the gate voltage is varied, the depth (position) for capturing electrons generated in the first diffusion layer (2) by the incident light is varied so as to correspond to the gate voltage, and a current indicating the quantity of the electrons is measured.
    Type: Application
    Filed: March 25, 2004
    Publication date: November 2, 2006
    Applicant: JAPAN SCIENCE AND TECHNOLOGY AGENCY
    Inventors: Kazuaki Sawada, Makoto Ishida, Yuki Maruyama, Hideki Muto