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: 10972732
    Abstract: An image decoding apparatus includes: an MPM candidate list deriving unit that derives an MPM candidate list by adding a plurality of different intra prediction modes to the MPM candidate list based on a shape of a target block, and an MPM parameter decoding unit decoding parameters for deriving the intra-prediction modes from the MPM candidate list.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: April 6, 2021
    Assignees: SHARP KABUSHIKI KAISHA, FG Innovation Company Limited
    Inventors: Yukinobu Yasugi, Tomohiro Ikai, Yoshiya Yamamoto
  • Publication number: 20210092423
    Abstract: A video encoding device (2) includes a side information determination section (21) and a side information encoding section (22). The side information determination section (21) sets a quantization parameter for each macroblock in such a manner that a difference between quantization parameters for each pair of macroblocks with successive encoding orders is equal to one of n difference values, and transforms the difference into one of n indices with respect to each pair. The side information encoding section (22) generates a binary sequence having a length corresponding to the size of the absolute value of the index. The total of absolute values of the n indices is smaller than the total of absolute values of the n difference values.
    Type: Application
    Filed: December 4, 2020
    Publication date: March 25, 2021
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Yukinobu YASUGI, Tomohiro IKAI, Tomoyuki YAMAMOTO
  • Publication number: 20210084335
    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: Application
    Filed: November 30, 2020
    Publication date: March 18, 2021
    Inventors: Tomohiro IKAI, Yukinobu YASUGI, Tomoyuki YAMAMOTO, Takeshi TSUKUBA
  • Publication number: 20210084308
    Abstract: A video decoding apparatus includes: a matrix reference pixel derivation unit configured to derive, as a reference image, an image obtained by down-sampling an image adjacently above a target block and an image adjacently leftward of the target block; a weight matrix derivation unit configured to derive a matrix of weighting factors in accordance with an intra prediction mode and a target block size; a matrix prediction image derivation unit configured to derive a prediction image by using a product of elements of the reference image and elements of the matrix of the weighting factors; and a matrix prediction image interpolation unit deriving, as a prediction image, the prediction image or an image obtained by interpolating the prediction image, wherein the weight matrix derivation unit derives a matrix with a size of a width equal to or smaller than a width of the target block size and a height equal to or smaller than a height of the target block size.
    Type: Application
    Filed: September 11, 2020
    Publication date: March 18, 2021
    Inventors: Yukinobu YASUGI, Eiichi SASAKI, Tomohiro IKAI, Tomoko AONO
  • Publication number: 20210067774
    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: Application
    Filed: August 20, 2020
    Publication date: March 4, 2021
    Inventors: YUKINOBU YASUGI, EIICHI SASAKI, TOMOHIRO IKAI
  • Publication number: 20210067798
    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 (3032, 3036 to 3038) 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 (30373) configured to search for a motion vector on a prediction unit basis through matching processing. The motion vector search unit (30373) 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: Application
    Filed: January 8, 2019
    Publication date: March 4, 2021
    Inventors: Takeshi CHUJOH, Tomoko AONO, Tomohiro IKAI, Eiichi SASAKI, Yukinobu YASUGI
  • Patent number: 10939137
    Abstract: An image decoding device (31) includes a transform coefficient decoding unit (311) configured to decode a transform coefficient for a transform tree included in a coding unit. In the transform tree, the transform coefficient decoding unit splits a transform unit corresponding to luminance and then decodes the transform coefficient related to the luminance, and does not split the transform unit corresponding to chrominance and decodes the transform coefficient related to the chrominance.
    Type: Grant
    Filed: April 23, 2018
    Date of Patent: March 2, 2021
    Assignees: SHARP KABUSHIKI KAISHA, FG INNOVATION COMPANY LIMITED
    Inventors: Tomohiro Ikai, Tomoko Aono, Yukinobu Yasugi, Tomonori Hashimoto
  • Patent number: 10904547
    Abstract: A video encoding device (2) includes a side information determination section (21) and a side information encoding section (22). The side information determination section (21) sets a quantization parameter for each macroblock in such a manner that a difference between quantization parameters for each pair of macroblocks with successive encoding orders is equal to one of n difference values, and transforms the difference into one of n indices with respect to each pair. The side information encoding section (22) generates a binary sequence having a length corresponding to the size of the absolute value of the index. The total of absolute values of the n indices is smaller than the total of absolute values of the n difference values.
    Type: Grant
    Filed: April 5, 2019
    Date of Patent: January 26, 2021
    Assignee: SHARP KABUSHIKIKAISHA
    Inventors: Yukinobu Yasugi, Tomohiro Ikai, Tomoyuki Yamamoto
  • 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
  • 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
  • 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
  • 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: 20200288147
    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: March 30, 2020
    Publication date: September 10, 2020
    Inventor: Yukinobu Yasugi
  • Patent number: 10764580
    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: Grant
    Filed: July 24, 2019
    Date of Patent: September 1, 2020
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Takanori Yamazaki, Tomohiro Ikai, Tomoyuki Yamamoto, Yukinobu Yasugi
  • Patent number: 10743024
    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: Grant
    Filed: December 4, 2018
    Date of Patent: August 11, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Tomoyuki Yamamoto, Tomohiro Ikai, Yukinobu Yasugi
  • Publication number: 20200236381
    Abstract: A value limiting filter includes a color space transform processing unit configured to transform an input image signal defined by a color space into an image signal of another color space, a clipping processing unit configured to perform processing of limiting a pixel value of the transformed image signal, and a color space inverse transform processing unit configured to transform the image signal having the limited pixel value into the image signal of the original color space.
    Type: Application
    Filed: September 21, 2018
    Publication date: July 23, 2020
    Inventors: Takeshi CHUJOH, Tomohiro IKAI, Tomoko AONO, Tomonori HASHIMOTO, Tianyang ZHOU, Yukinobu YASUGI