Patents by Inventor Yukinobu Yasugi

Yukinobu Yasugi 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: 11677943
    Abstract: Delay based on WPP processing is reduced. An image decoding apparatus (31) includes: a prediction image generation unit (308) by using decoded data from a first position to a second position, the first position being, in a CTU row immediately above a CTU row including a target CTU, identical to a position of the target CTU, the second position being a position one CTU forward relative to the first position; and an entropy decoding unit (301) that performs decoding of the target CTU by using the decoded data from the first position to the second position, the first position being, in the CTU row immediately above the CTU row including the target CTU, identical to the position of the target CTU, the second position being a position one CTU forward relative to the first position.
    Type: Grant
    Filed: December 14, 2021
    Date of Patent: June 13, 2023
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Tomohiro Ikai, Yukinobu Yasugi
  • Publication number: 20230179775
    Abstract: A coding device and a decoding device are configured to include an estimated prediction mode deciding section (122a) including: a reference block selecting section (1223a) for selecting a reference block for use in estimating an intra-prediction mode for a subject block; an estimating number deciding section (1222a) for deciding an estimating number of estimated values to be estimated for the intra-prediction mode; and an estimated prediction mode deriving section (1221a) for estimating, based on a reference block, the estimating number of estimated values of the prediction mode.
    Type: Application
    Filed: January 30, 2023
    Publication date: June 8, 2023
    Inventor: Yukinobu Yasugi
  • Patent number: 11671620
    Abstract: A load in processing of searching for a motion vector is reduced. In order to solve the problem described above, a motion vector derivation apparatus according to one aspect of the present invention that derives a motion vector to be referred to for generating a prediction image to be used for coding or decoding of a video includes a motion vector search unit configured to search for a motion vector on a prediction unit basis through matching processing. The motion vector search unit is configured to stop search of the motion vector, depending on whether or not a conditional expression according to a pixel bit-depth is satisfied.
    Type: Grant
    Filed: December 8, 2021
    Date of Patent: June 6, 2023
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Takeshi Chujoh, Tomoko Aono, Tomohiro Ikai, Eiichi Sasaki, Yukinobu Yasugi
  • Patent number: 11652991
    Abstract: A video decoding apparatus (31) for splitting an image into tiles, splits a tile of the tiles into coding tree units (CTUs), and decodes a video on a per-CTU basis, the video decoding apparatus including a header decoder (3020) configured to decode tile unit information indicating a unit for a size of a tile from header information of a coding stream, and a coding tree (CT) decoder (3021) configured to split the tile into CTUs, wherein the header decoder derives a tile upper left position and a tile size by using the tile unit information.
    Type: Grant
    Filed: June 24, 2019
    Date of Patent: May 16, 2023
    Assignees: SHARP KABUSHIKI KAISHA, FG Innovation Company Limited
    Inventors: Yukinobu Yasugi, Tomohiro Ikai, Tomoko Aono
  • Patent number: 11653010
    Abstract: In a moving image decoding device for decoding encoded data of a tile group splitting a picture into one or more rectangular regions and consisting of one or more segments, a WPP enabled flag for indicating whether a segment in an object tile group is a CTU row having a height of one CTU is decoded, and when the WPP enabled flag is 1, after a CTU at a right end of the CTU row is decoded, an end bit of a first segment having a fixed value is decoded.
    Type: Grant
    Filed: December 20, 2019
    Date of Patent: May 16, 2023
    Assignees: SHARP KABUSHIKI KAISHA, FG Innovation Company Limited
    Inventors: Sachin G. Deshpande, Eiichi Sasaki, Takeshi Chujoh, Yukinobu Yasugi, Tomohiro Ikai, Tomoko Aono
  • Publication number: 20230147701
    Abstract: In coding and decoding of motion vectors of a B slice, in a case that a mode that causes a value of difference between motion vectors of L1 prediction defined in a picture header to be equal to zero is configured, a symmetric motion vector difference mode no longer operates regardless of a reference picture list structure. In a case that multiple slices are present in one picture, coding efficiency significantly decreases depending on a selected reference picture. A mode that causes a difference between motion vectors of L1 prediction of bi-directional prediction switchable per picture to be equal to zero is provided, and in a case that all of referable short-term reference pictures in two reference picture lists are preceding pictures or subsequent pictures, the mode is applicable.
    Type: Application
    Filed: March 26, 2021
    Publication date: May 11, 2023
    Inventors: Takeshi CHUJOH, Tomohiro IKAI, Tomoko AONO, Eiichi SASAKI, Tomonori HASHIMOTO, Tianyang ZHOU, Yukinobu YASUGI
  • Publication number: 20230143900
    Abstract: A video decoding apparatus is a video decoding apparatus for deriving a prediction image by using a reference picture included in a reference picture list.
    Type: Application
    Filed: March 26, 2021
    Publication date: May 11, 2023
    Inventors: Takeshi CHUJOH, Tomohiro IKAI, Tomoko AONO, Eiichi SASAKI, Tomonori HASHIMOTO, Tianyang ZHOU, Yukinobu YASUGI
  • Patent number: 11641479
    Abstract: In conventional cases that different trees are used between luma and chroma and that luma chroma prediction including multiplication in chroma intra prediction is used, there is a problem in that a processing delay caused by the chroma intra prediction is increased in small blocks. In a case that two different trees are used between luma and chroma, in a case of an 8×8 block in a luma size, 0 is derived without decoding qt_split_cu_flag, and in a case of an 8×4/4×8 block in a luma size, 0 is derived without decoding mtt_split_cu_flag. In a case that the size of a target block is smaller than a prescribed size, a chroma intra mode is derived from any one of DC, leftward prediction, and upward prediction.
    Type: Grant
    Filed: December 2, 2019
    Date of Patent: May 2, 2023
    Assignees: SHARP KABUSHIKI KAISHA, Sharp Corporation
    Inventors: Tianyang Zhou, Tomohiro Ikai, Eiichi Sasaki, Yukinobu Yasugi
  • Patent number: 11627337
    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: Grant
    Filed: September 14, 2020
    Date of Patent: April 11, 2023
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Tomoyuki Yamamoto, Tomohiro Ikai, Yukinobu Yasugi, Takeshi Tsukuba
  • Patent number: 11616952
    Abstract: An image decoding apparatus includes: a first filter unit configured to apply a first filter to an image (a luminance image and a chrominance image); a second filter unit configured to apply a second filter to an output image of the first filter; a filter set derivation unit configured to decode a filter coefficient from coded data; and a third filter unit configured to apply a third filter to an output image of the second filter by using the filter coefficient. In a case that the third filter unit performs filter processing for the luminance image by using a luminance output image of the second filter, the third filter unit performs processing of clipping an amount of change of a pixel value through the filter processing within a prescribed range of value.
    Type: Grant
    Filed: October 20, 2021
    Date of Patent: March 28, 2023
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Yukinobu Yasugi, Eiichi Sasaki, Tomohiro Ikai
  • Publication number: 20230085680
    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: Application
    Filed: November 30, 2022
    Publication date: March 23, 2023
    Inventors: TAKESHI CHUJOH, TOMOHIRO IKAI, TOMOKO AONO, EIICHI SASAKI, YUKINOBU YASUGI, TOMONORI HASHIMOTO, TIANYANG ZHOU
  • Patent number: 11589056
    Abstract: A video decoding apparatus includes matrix reference pixel derivation circuitry that derives reference samples by using top neighboring samples and left neighboring samples of a current block, weight matrix derivation circuitry that derives a weight matrix, matrix prediction image derivation circuitry that derives a prediction image, and matrix prediction image interpolation circuitry that derives a predicted image by using the prediction image. A size index is derived according to a value of a target block width and a value of a target block height. A prediction size is derived using the size index. In a case that a first condition, that both the value of the transform block width and the value of the transform block height are equal to 4, is true, the size index is set equal to 0 and the prediction size is set equal to 4.
    Type: Grant
    Filed: September 27, 2021
    Date of Patent: February 21, 2023
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Yukinobu Yasugi, Eiichi Sasaki, Tomohiro Ikai, Tomoko Aono
  • Publication number: 20230041444
    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: Application
    Filed: October 26, 2022
    Publication date: February 9, 2023
    Inventors: Takeshi Chujoh, Yukinobu Yasugi, Eiichi Sasaki, Tomoko Aono, Tomohiro Ikai
  • Patent number: 11570448
    Abstract: A coding device and a decoding device are configured to include an estimated prediction mode deciding section including: a reference block selecting section for selecting a reference block for use in estimating an intra-prediction mode for a subject block; an estimating number deciding section for deciding an estimating number of estimated values to be estimated for the intra-prediction mode; and an estimated prediction mode deriving section for estimating, based on a reference block, the estimating number of estimated values of the prediction mode.
    Type: Grant
    Filed: August 27, 2021
    Date of Patent: January 31, 2023
    Assignee: Velos Media, LLC
    Inventor: Yukinobu Yasugi
  • 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: 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: 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: 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