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: 20210021820
    Abstract: A filtered image with enhanced image quality is output. Provided is a loop filter including: a filtering processing unit configured to apply a filter to an unfiltered image; and an ALF unit configured to receive input of a DL image to which a filter is applied by a first filtering processing unit out of the filtering processing unit. The ALF unit further receives input of the unfiltered image.
    Type: Application
    Filed: March 25, 2019
    Publication date: January 21, 2021
    Inventors: TOMOHIRO IKAI, NORIO ITOH, TAKESHI CHUJOH, YASUAKI TOKUMO, HIROSHI WATANABE
  • Patent number: 10897632
    Abstract: The amount of processing is reduced with high coding efficiency maintained. There is provided an arithmetic decoding device including syntax decoding means for decoding each of at least a first syntax element and a second syntax element indicating a transform coefficient using arithmetic decoding with a context or arithmetic decoding without a context. The syntax decoding means performs decoding that at least includes not decoding the first syntax element and decoding the second syntax element using the arithmetic decoding without a context, and decoding the first syntax element using the arithmetic decoding with a context and decoding the second syntax element using the arithmetic decoding without a context.
    Type: Grant
    Filed: December 6, 2019
    Date of Patent: January 19, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Tomohiro Ikai, Yukinobu Yasugi, Tomoyuki Yamamoto, Takeshi Tsukuba
  • Patent number: 10887626
    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: Grant
    Filed: April 19, 2017
    Date of Patent: January 5, 2021
    Assignees: SHARP KABUSHIKI KAISHA, FG Innovation Company Limited
    Inventor: Tomohiro Ikai
  • Patent number: 10887619
    Abstract: A prediction image generation apparatus for generating a prediction image by performing motion compensation on multiple reference images, the prediction image generation apparatus includes a prediction image generation unit configured to generate the prediction image with reference to a first reference image, a second reference image and a gradient correction term. A motion compensation unit having a motion compensation function using a bi-prediction gradient change (Bi-directional optical flow, BIO) prediction derives the gradient correction term with reference to each pixel value of a horizontal gradient image and a vertical gradient image.
    Type: Grant
    Filed: December 22, 2016
    Date of Patent: January 5, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Tomohiro Ikai, Tomoyuki Yamamoto
  • Publication number: 20200413091
    Abstract: Memory required during decoding is reduced. A video image decoding device (1) is equipped with main direction deriving means (1453A) that references a prediction mode definition DEFPM(1), and from a prediction mode number, derives a main direction of a prediction direction corresponding to a prediction mode, and a gradient deriver (1453B) that references a gradient definition table DEFANG(1), and derives a gradient of the prediction direction.
    Type: Application
    Filed: September 14, 2020
    Publication date: December 31, 2020
    Inventors: Tomoyuki YAMAMOTO, Tomohiro IKAI, Yukinobu YASUGI, Takeshi TSUKUBA
  • Publication number: 20200404265
    Abstract: An adaptive offset filter (60) adds an offset to the pixel value of each pixel forming an input image. The adaptive offset filter (60) refers to offset-type specifying information, sets offset attributes for a subject unit area of the input image, decodes an offset having a bit width corresponding to an offset value range included in the set offset attributes, and adds the offset to the pixel value of each pixel forming the input image.
    Type: Application
    Filed: August 31, 2020
    Publication date: December 24, 2020
    Applicant: HUAWEI TECHNOLOGIES CO.,LTD.
    Inventors: Takanori Yamazaki, Tomohiro Ikai, Tomoyuki Yamamoto, Yukinobu Yasugi
  • Patent number: 10873746
    Abstract: An intra prediction image decoding apparatus is provided with a prediction parameter derivation circuitry that derives prediction parameters of multiple luminance blocks. A Cross-component Linear Model (CCLM) is used to specify the model and the prediction parameter is obtained, and thus an intra prediction image with reference to the prediction parameters is generated.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: December 22, 2020
    Assignees: SHARP KABUSHIKI KAISHA, FG Innovation Company Limited
    Inventors: Tomohiro Ikai, Yukinobu Yasugi, Yoshiya Yamamoto, Tomonori Hashimoto
  • Patent number: 10863186
    Abstract: An image decoding apparatus is provided with a CT information decoding unit that decodes division information indicating a division method for binary tree division with respect to a coding node of a coding tree unit, and performs the binary tree division with respect to the coding node by referring to the division information of another decoded coding node.
    Type: Grant
    Filed: August 1, 2017
    Date of Patent: December 8, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Yoshiya Yamamoto, Yukinobu Yasugi, Tomohiro Ikai, Tomoko Aono
  • Patent number: 10848764
    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 8, 2019
    Date of Patent: November 24, 2020
    Assignee: Velos Media, LLC
    Inventors: Tomohiro Ikai, Takeshi Tsukuba
  • Publication number: 20200366894
    Abstract: An image decoding apparatus (31) includes a CT information decoding unit (10) configured, in each coding tree, to decode a constraint flag indicating whether or not to constrain decoding a prediction unit, and a CU decoding unit (20) configured, in the coding tree, to decode a prediction unit in a coding node to be decoded first and to not decode a prediction unit in another coding node, in a case that the constraint flag indicates constraint of decoding the prediction unit. According to the present invention, it is possible to reduce a coding amount of PU and complexity of coding/decoding an image while maintaining a split with a high degree of freedom by CT split (QT split and BT split).
    Type: Application
    Filed: August 4, 2020
    Publication date: November 19, 2020
    Inventors: TOMOHIRO IKAI, TOMOKO AONO
  • Publication number: 20200366916
    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: June 25, 2020
    Publication date: November 19, 2020
    Inventors: Tomoyuki Yamamoto, Tomohiro Ikai, Yukinobu Yasugi, Takeshi Tsukuba
  • Patent number: 10841600
    Abstract: Even in a case in which a color format is a format other than 4:2:0, an image coding device and an image decoding device capable of accurately locating a reference pixel position in inter-layer image prediction are realized. A hierarchical moving image decoding device (1) includes a parameter set decoding section (12) that decodes a scaled reference layer offset syntax that is coded in a chroma pixel unit and a predicted image generation section (1442) that derives a scale based on a scaled reference layer offset which is a product of the scaled reference layer offset syntax and a luminance chroma size ratio of a target layer picture and generates a predicted image.
    Type: Grant
    Filed: October 30, 2018
    Date of Patent: November 17, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Tomoyuki Yamamoto, Tomohiro Ikai, Takeshi Tsukuba
  • Publication number: 20200359042
    Abstract: At least one of a vector candidate derivation unit and a merge candidate derivation unit derives a motion vector of each of multiple sub-blocks contained in a decoding target block by referring to motion vectors at multiple control points including two points at an interval which is longer than one side of the target block, and a prediction image generation unit refers to the motion vector of each sub-block to generate a prediction image.
    Type: Application
    Filed: July 27, 2020
    Publication date: November 12, 2020
    Inventors: TOMOHIRO IKAI, TOMOYUKI YAMAMOTO
  • Publication number: 20200322634
    Abstract: A layer incapable of being decoded on a bit stream which is generated through a bit stream extraction process from a bit stream including a prescribed layer set and which only includes a layer set made up of a subset of the prescribed layer set, occurs. An aspect of the present disclosure specifies a bit stream constraint pertaining to a parameter set, and a bit stream extraction process.
    Type: Application
    Filed: April 22, 2020
    Publication date: October 8, 2020
    Inventors: Takeshi TSUKUBA, Tomoyuki YAMAMOTO, Tomohiro IKAI
  • Patent number: 10798403
    Abstract: At least one of a vector candidate derivation unit and a merge candidate derivation unit derives a motion vector of each of multiple sub-blocks contained in a decoding target block by referring to motion vectors at multiple control points including two points at an interval which is longer than one side of the target block, and a prediction image generation unit refers to the motion vector of each sub-block to generate a prediction image.
    Type: Grant
    Filed: January 11, 2017
    Date of Patent: October 6, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Tomohiro Ikai, Tomoyuki Yamamoto
  • Publication number: 20200304830
    Abstract: To achieve a reduction in the amount of coding taken in the use of an asymmetric partition and to implement efficient encoding/decoding processes exploiting the characteristics of the asymmetric partition. An image decoding device includes a motion compensation parameter derivation unit configured to derive a motion compensation parameter indicating either a uni-prediction scheme or a bi-prediction scheme. In a case that a prediction unit has a size less than or equal to a predetermined value, the motion compensation parameter derivation unit is configured to derive the motion compensation parameter by switching between the prediction schemes.
    Type: Application
    Filed: June 9, 2020
    Publication date: September 24, 2020
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Tomoyuki YAMAMOTO, Tomohiro IKAI, Yukinobu YASUGI
  • Publication number: 20200296404
    Abstract: To suppress an overhead of a flag indicating a motion compensation filter. A motion compensation filter apparatus includes a motion compensation filter unit configured to switch a filter to apply on a full sample image in a certain unit, and an MC filter parameter derivation unit configured to select a switching unit for filter switching by the motion compensation filter unit.
    Type: Application
    Filed: September 21, 2018
    Publication date: September 17, 2020
    Inventors: YUKINOBU YASUGI, TOMOHIRO IKAI, TAKESHI CHUJOH
  • Publication number: 20200294272
    Abstract: An image decoding apparatus includes a decoding unit configured to decode coded data into a decoded image and segmentation metadata, a segmentation metadata decoding unit configured to generate segmentation information, and an image processing unit configured to perform prescribed image processing on the decoded image with reference to the segmentation information.
    Type: Application
    Filed: March 9, 2020
    Publication date: September 17, 2020
    Inventors: NORIO ITOH, TOMOHIRO IKAI, TAKESHI CHUJOH, TOMONORI HASHIMOTO, EIICHI SASAKI
  • Publication number: 20200296380
    Abstract: The coding efficiency and the amount of processing can be further improved in methods that use the correlation between spatial and temporal directions to estimate parameters that are required for predictions. In LM prediction that predicts pixel values of chrominance, based on pixel values of luminance, an index for a filter that downsamples a luminance image is adaptively signalled.
    Type: Application
    Filed: September 7, 2018
    Publication date: September 17, 2020
    Inventors: Tomoko AONO, Tomohiro IKAI, Takeshi CHUJOH
  • Patent number: 10778976
    Abstract: An image decoding apparatus (31) includes a CT information decoding unit (10) configured, in each coding tree, to decode a constraint flag indicating whether or not to constrain decoding a prediction unit, and a CU decoding unit (20) configured, in the coding tree, to decode a prediction unit in a coding node to be decoded first and to not decode a prediction unit in another coding node, in a case that the constraint flag indicates constraint of decoding the prediction unit. According to the present invention, it is possible to reduce a coding amount of PU and complexity of coding/decoding an image while maintaining a split with a high degree of freedom by CT split (QT split and BT split).
    Type: Grant
    Filed: August 24, 2017
    Date of Patent: September 15, 2020
    Assignees: SHARP KABUSHIKI KAISHA, FG Innovation Company Limited
    Inventors: Tomohiro Ikai, Tomoko Aono