Patents by Inventor Tomohiro Ikai

Tomohiro Ikai 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: 20230026492
    Abstract: A device may be configured to signal range extension profile information for coded video according to one or more of the techniques described herein.
    Type: Application
    Filed: June 24, 2022
    Publication date: January 26, 2023
    Inventors: TOMOHIRO IKAI, SACHIN G. DESHPANDE, CHRISTOPHER ANDREW SEGALL
  • Publication number: 20230021748
    Abstract: In a case that luminance information is used for a chrominance prediction in a separate coding tree structure, there is a problem that chrominance blocks cannot be decoded before all luminance blocks constituting a tree are decoded. An image decoding apparatus that splits an image into coding tree units (CTUs) that are rectangular for processing includes a CT information decoding unit configured to split a CTU of the CTUs into coding trees CTs and to process one or more color components as a single coding tree using one coding tree CT of the coding trees CTs or process two or more color components as a separate coding tree using two or more coding trees CTs of the coding trees CTs depending on a tree mode, a CU decoding unit configured to decode a split flag indicating whether to further split a CT of the CTs and to recursively perform block splitting, and an intra predictor configured to use a decoded image of one color component to generate a prediction image of another color component.
    Type: Application
    Filed: October 3, 2022
    Publication date: January 26, 2023
    Inventors: TOMOHIRO IKAI, TOMOKO AONO
  • Patent number: 11563934
    Abstract: An adaptive motion vector prediction unit configured to adaptively perform spatial prediction that performs prediction using a motion vector around a target block and temporal prediction that performs prediction using a motion vector of a collocated picture is included, and in the temporal prediction performed by the adaptive motion vector prediction unit, the collocated picture to be referred to is designated on a per picture basis, and a reference list is designated on a per slice basis.
    Type: Grant
    Filed: December 15, 2020
    Date of Patent: January 24, 2023
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Takeshi Chujoh, Tomohiro Ikai, Tomoko Aono, Eiichi Sasaki, Yukinobu Yasugi, Tomonori Hashimoto, Tianyang Zhou
  • Patent number: 11539968
    Abstract: A mechanism is provided that implements video coding and decoding such that only a specific partial image region on a screen can be independently decoded. A video decoding apparatus (31) according to an aspect of the present invention configures, in intra prediction, inter prediction, loop filter processing, or the like, a partial image region in a picture, handles a region outside the partial image region in a similar manner to a region outside the picture, and does not apply such restriction to a non-partial image region other than the partial image region in the picture.
    Type: Grant
    Filed: August 22, 2019
    Date of Patent: December 27, 2022
    Assignees: SHARP KABUSHIKI KAISHA, FG INNOVATION COMPANY LIMITED
    Inventors: Takeshi Chujoh, Yukinobu Yasugi, Eiichi Sasaki, Tomoko Aono, Tomohiro Ikai
  • Publication number: 20220408092
    Abstract: There is provided a terminal device capable of efficiently performing communication in a communication system in which a base station device and the terminal device communicate with each other. The terminal device that communicates with the base station device by using a plurality of aggregated cells recognizes that a serving cell is stopped in a first state, recognizes that the serving cell is started in a second state, and switches from the first state to the second state based on a received PDCCH.
    Type: Application
    Filed: August 29, 2022
    Publication date: December 22, 2022
    Inventors: Tomohiro IKAI, Takeshi TSUKUBA
  • Publication number: 20220377387
    Abstract: The present invention avoids waste caused by performing both a Secondary Transform and an Adaptive Multiple Core Transform. Provided is a device including: a core transform unit (1521) that can perform an Adaptive Multiple Core Transform on a Coding Tree Unit; and a Secondary Transform unit (1522) that can perform, before the Adaptive Multiple Core Transform, a Secondary Transform on at least any one of sub-blocks included in the Coding Tree Unit. The device omits any of the Adaptive Multiple Core Transform and the Secondary Transform in accordance with at least any of a flag associated with the Adaptive Multiple Core Transform and a flag associated with the Secondary Transform, or in accordance with a size of the Coding Tree Unit.
    Type: Application
    Filed: June 16, 2022
    Publication date: November 24, 2022
    Inventor: TOMOHIRO IKAI
  • Patent number: 11509898
    Abstract: There is provided a terminal device capable of efficiently performing communication in a communication system in which a base station device and the terminal device communicate with each other. The terminal device that communicates with the base station device by using a plurality of aggregated cells recognizes that a serving cell is stopped in a first state, recognizes that the serving cell is started in a second state, and switches from the first state to the second state based on a received PDCCH.
    Type: Grant
    Filed: October 22, 2020
    Date of Patent: November 22, 2022
    Assignee: Velos Media, LLC
    Inventors: Tomohiro Ikai, Takeshi Tsukuba
  • Publication number: 20220368944
    Abstract: The amount of memory required for CCLM prediction is reduced. The CCLM prediction parameter derivation unit (310442) derives a scale shift value corresponding to a luma difference value, and derives a CCLM prediction parameter, by shifting, by using the scale shift value, a value obtained by multiplying a value of a table referred to with a value obtained by performing right shift of the luma difference value by the scale shift value as an index and a chroma difference value. In addition, in a case of deriving a prediction image, a bit width is reduced by adaptively deriving a shift amount of a linear prediction parameter from the chroma difference value.
    Type: Application
    Filed: July 19, 2022
    Publication date: November 17, 2022
    Inventors: Yukinobu YASUGI, Eiichi SASAKI, Tomohiro IKAI, Tomoko AONO
  • Patent number: 11503319
    Abstract: In a case that luminance information is used for a chrominance prediction in a separate coding tree structure, there is a problem that chrominance blocks cannot be decoded before all luminance blocks constituting a tree are decoded. An image decoding apparatus that splits an image into coding tree units (CTUs) that are rectangular for processing includes a CT information decoding unit configured to split a CTU of the CTUs into coding trees CTs and to process one or more color components as a single coding tree using one coding tree CT of the coding trees CTs or process two or more color components as a separate coding tree using two or more coding trees CTs of the coding trees CTs depending on a tree mode, a CU decoding unit configured to decode a split flag indicating whether to further split a CT of the CTs and to recursively perform block splitting, and an intra predictor configured to use a decoded image of one color component to generate a prediction image of another color component.
    Type: Grant
    Filed: September 10, 2021
    Date of Patent: November 15, 2022
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Tomohiro Ikai, Tomoko Aono
  • Publication number: 20220345734
    Abstract: An image decoding apparatus is implemented that can suppress a decrease in coding efficiency in a case that a high compression rate is achieved. The image decoding apparatus includes a parameter decoder, and the parameter decoder decodes a skip flag indicating whether a skip mode is applied, and in a case that the skip flag does not indicate the skip mode, decodes a merge flag indicating whether a merge mode is applied, and in a case that the merge flag does not indicate the merge mode, decodes an MMVD flag indicating whether an MMVD mode is applied.
    Type: Application
    Filed: July 7, 2022
    Publication date: October 27, 2022
    Inventors: Takeshi CHUJOH, Eiichi SASAKI, Tomonori HASHIMOTO, Tomoko AONO, Tomohiro IKAI
  • Patent number: 11463701
    Abstract: A prediction image generation method is provided. The method derives a down-sampled luminance image and a down-sampled neighboring luminance image by down-sampling the luminance image of a target block and a neighboring luminance image based on information related to a down-sampling and indicating one of a plurality of position relationships between at least one luma pixel and a chroma pixel. The method derives a neighboring chrominance image, parameters derived from the down-sampled neighboring luminance image and the neighboring chrominance image, and the prediction image by using the down-sampled luminance image and the parameters. The position relationships include that a position of the chroma pixel is identical to a position of one of the at least one luma pixel and that the position of the chroma pixel is located in an intermediate of two of the at least one luma pixel on a left side of a 2×2 luma pixel block.
    Type: Grant
    Filed: May 20, 2021
    Date of Patent: October 4, 2022
    Assignees: SHARP KABUSHIKI KAISHA, FG Innovation Company Limited
    Inventors: Tomoko Aono, Tomohiro Ikai, Takeshi Chujoh
  • Publication number: 20220312032
    Abstract: Coding efficiency is improved. A motion compensation filter unit acts on a motion vector applied image obtained by acting a motion vector on a reference image. The motion compensation filter unit causes filter coefficients mcFilter[i][k] designated by a phase i and a filter coefficient position k to act on the motion vector applied image. The filter coefficients mcFilter[i][k] includes filter coefficients calculated by using filter coefficients mcFilter[p][k] (p?i) and filter coefficients mcFilter[q][k] (q?i).
    Type: Application
    Filed: April 22, 2022
    Publication date: September 29, 2022
    Inventor: Tomohiro IKAI
  • Patent number: 11451825
    Abstract: The amount of memory required for CCLM prediction is reduced. The CCLM prediction parameter derivation unit (310442) derives a scale shift value corresponding to a luma difference value, and derives a CCLM prediction parameter, by shifting, by using the scale shift value, a value obtained by multiplying a value of a table referred to with a value obtained by performing right shift of the luma difference value by the scale shift value as an index and a chroma difference value. In addition, in a case of deriving a prediction image, a bit width is reduced by adaptively deriving a shift amount of a linear prediction parameter from the chroma difference value.
    Type: Grant
    Filed: December 17, 2019
    Date of Patent: September 20, 2022
    Assignees: SHARP KABUSHIKI KAISHA, FG INNOVATION COMPANY LIMITED
    Inventors: Yukinobu Yasugi, Eiichi Sasaki, Tomohiro Ikai, Tomoko Aono
  • Publication number: 20220295091
    Abstract: In the related art, in some cases the weighted prediction processing is performed even in a case that normal prediction processing is to be performed. A video decoding apparatus includes a weighted prediction processing unit configured to decode a weight coefficient and an offset value from coded data and to generate a prediction image by multiplying an interpolation image by the weight coefficient and adding the offset value to the interpolation image, and a normal prediction processing unit configured to generate a prediction image from the interpolation image. In a case that in the weighted prediction processing unit, a bi-prediction is performed and information of the weight coefficient and the offset value is absent for both a reference list 0 and a reference list 1, the normal prediction processing unit generates a bi-prediction image.
    Type: Application
    Filed: November 26, 2020
    Publication date: September 15, 2022
    Inventors: Takeshi CHUJOH, Tomohiro IKAI, Tomoko AONO, Eiichi SASAKI, Tomonori HASHIMOTO
  • Publication number: 20220293966
    Abstract: A fuel cell electrode catalyst includes: catalyst metal particles containing at least one of platinum or a platinum alloy; and support particles supporting the catalyst metal particles. The crystallite size 2r obtained from an X-ray diffraction image of the catalyst metal particles is 3.8 nm or less, where r represents a crystallite radius of the catalyst metal particles obtained from the X-ray diffraction image. The amount of CO adsorption Y (mL/g?Pt) on the fuel cell electrode catalyst satisfies Y?40.386/r+1.7586.
    Type: Application
    Filed: March 9, 2022
    Publication date: September 15, 2022
    Inventors: Toshihiro IKAI, Tomohiro ISHIDA, Godai KITAYAMA, Yousuke HORIUCHI
  • Publication number: 20220293967
    Abstract: A fuel cell electrode catalyst includes catalyst metal particles and electrically conductive support particles supporting the catalyst metal particles. In the fuel cell electrode catalyst, a proportion of a surface area occupied by the catalyst metal particles with particle sizes of 4.5 nm or less to a surface area of the catalyst metal particles calculated from a transmission electron microscope image is 5% or less.
    Type: Application
    Filed: March 8, 2022
    Publication date: September 15, 2022
    Inventors: Toshihiro IKAI, Tomohiro ISHIDA, Godai KITAYAMA, Yousuke HORIUCHI
  • Publication number: 20220286693
    Abstract: In a conventional art, an output layer set having no output layer is sometimes defined. Consequently, even if the decoder decodes a bit stream to obtain each layer in the output layer set without the output layer, there is no picture to be outputted. There is a possibility that such coded data causes the decoder expecting an output to operate unexpectedly. Output layer sets having the same configuration may be defined. Consequently, the amount of code pertaining to the output layer sets defined in an overlapping manner is redundant. According to an aspect of the present disclosure, a specification of a bit stream conformance pertaining to the output layer set prevents occurrence of an output layer set without an output layer and a redundant output layer set.
    Type: Application
    Filed: May 24, 2022
    Publication date: September 8, 2022
    Inventors: Takeshi TSUKUBA, Tomohiro IKAI, Tomoyuki YAMAMOTO
  • Publication number: 20220286699
    Abstract: A reference picture information decoding unit (13) omits decoding of a reference list sorting presence or absence flag and/or a reference list sorting order based on the number of current picture referable pictures.
    Type: Application
    Filed: March 21, 2022
    Publication date: September 8, 2022
    Inventors: Tomoyuki Yamamoto, Tomohiro Ikai, Yukinobu Yasugi, Takeshi Tsukuba
  • Patent number: 11431972
    Abstract: An image coding apparatus includes a coded data generating unit configured to generate coded data including image data for a subpicture acquired by dividing a picture, where the coded data generating unit generates, on a per subpicture basis, a subpicture header including subpicture identification information used for identifying the subpicture, and causes the generated subpicture header to be included in the coded data.
    Type: Grant
    Filed: May 13, 2019
    Date of Patent: August 30, 2022
    Assignees: SHARP KABUSHIKI KAISHA, FG Innovation Company Limited
    Inventors: Tomoko Aono, Takeshi Chujoh, Tomohiro Ikai, Yukinobu Yasugi
  • Publication number: 20220264142
    Abstract: An image decoding apparatus is provided that selectively uses a merge mode in a case that an MMVD mode is not available, thus achieving high coding efficiency. The image decoding apparatus includes a parameter decoder, and in a case that a regular merge flag indicates a regular merge mode, checks a flag indicating whether an MMVD prediction signalled in a sequence parameter set or the like is available, and in a case that the MMVD prediction is not available, decodes motion vector information obtained from a merge candidate.
    Type: Application
    Filed: July 21, 2020
    Publication date: August 18, 2022
    Inventors: Tomonori HASHIMOTO, Eiichi SASAKI, Tomohiro IKAI, Tomoko AONO