Patents by Inventor Takeshi Chujoh

Takeshi Chujoh 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: 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
  • Publication number: 20230007275
    Abstract: According to an embodiment, an encoding device includes an index setting unit and an encoding unit. The index setting unit generates a common index in which reference indices of one or more reference images included in a first index and a second index are sorted in a combination so as not to include a same reference image in accordance with a predetermined scanning order. The first index representing a combination of the one or more reference images referred to by a first reference image. The second index representing a combination of the one or more reference images referred to by a second reference image. The encoding unit encodes the common index.
    Type: Application
    Filed: September 9, 2022
    Publication date: January 5, 2023
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akiyuki TANIZAWA, Takeshi CHUJOH, Taichiro SHIODERA
  • 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: 20220385932
    Abstract: According to an embodiment, an image coding method is for coding an image including a luminance component and color difference components. The method includes acquiring a reference image; and generating a predicted image by interpolating the luminance component and the color difference components in the reference image according to a motion vector. If a size of a block, which is designated as a unit of the interpolation, is equal to or smaller than a predetermined first threshold value, the generating includes inhibiting a bi-directional prediction, and performing only a uni-directional prediction to generate the predicted image according to the motion vector.
    Type: Application
    Filed: August 10, 2022
    Publication date: December 1, 2022
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Takeshi CHUJOH, Tomoo YAMAKAGE
  • 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: 11483570
    Abstract: According to an embodiment, an encoding device includes an index setting unit and an encoding unit. The index setting unit generates a common index in which reference indices of one or more reference images included in a first index and a second index are sorted in a combination so as not to include a same reference image in accordance with a predetermined scanning order. The first index representing a combination of the one or more reference images referred to by a first reference image. The second index representing a combination of the one or more reference images referred to by a second reference image. The encoding unit encodes the common index.
    Type: Grant
    Filed: April 24, 2020
    Date of Patent: October 25, 2022
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akiyuki Tanizawa, Takeshi Chujoh, Taichiro Shiodera
  • 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
  • Patent number: 11451808
    Abstract: According to an embodiment, an image coding method is for coding an image including a luminance component and color difference components. The method includes acquiring a reference image; and generating a predicted image by interpolating the luminance component and the color difference components in the reference image according to a motion vector. If a size of a block, which is designated as a unit of the interpolation, is equal to or smaller than a predetermined first threshold value, the generating includes inhibiting a bi-directional prediction, and performing only a uni-directional prediction to generate the predicted image according to the motion vector.
    Type: Grant
    Filed: May 4, 2020
    Date of Patent: September 20, 2022
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Takeshi Chujoh, Tomoo Yamakage
  • 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
  • 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
  • Patent number: 11425396
    Abstract: According to an embodiment, an encoding device includes an index setting unit and an encoding unit. The index setting unit generates a common index in which reference indices of one or more reference images included in a first index and a second index are sorted in a combination so as not to include a same reference image in accordance with a predetermined scanning order. The first index representing a combination of the one or more reference images referred to by a first reference image. The second index representing a combination of the one or more reference images referred to by a second reference image. The encoding unit encodes the common index.
    Type: Grant
    Filed: April 24, 2020
    Date of Patent: August 23, 2022
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akiyuki Tanizawa, Takeshi Chujoh, Taichiro Shiodera
  • Publication number: 20220256158
    Abstract: According to an embodiment, an encoding device includes a deriving unit and an encoding unit. The deriving unit is configured to derive a first reference value based on fixed point precision representing roughness of a weighting factor that is used for multiplying a reference image. The encoding unit is configured to encode a first difference value that is a difference value between the weighting factor and the first reference value and the fixed point precision. The weighting factor is included in a first range of predetermined bit precision having the first reference value at approximate center. The first difference value is in the predetermined range.
    Type: Application
    Filed: April 28, 2022
    Publication date: August 11, 2022
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akiyuki TANIZAWA, Takeshi CHUJOH
  • Patent number: 11412243
    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: Grant
    Filed: December 3, 2019
    Date of Patent: August 9, 2022
    Assignees: SHARP KABUSHIKI KAISHA, FG INNOVATION COMPANY LIMITED
    Inventors: Takeshi Chujoh, Eiichi Sasaki, Tomonori Hashimoto, Tomoko Aono, Tomohiro Ikai
  • Publication number: 20220248043
    Abstract: According to an embodiment, a decoding device includes an acquiring unit configured to acquire first format information, encoded data, and first filter information, the first format information indicating a resolution of a color-difference component of the encoded data; a decoding unit configured to decode the encoded data to obtain a decoded image; and a converting unit configured to convert a color-difference format of the decoded image represented by a first color-difference format by using a filter identified by the filter information.
    Type: Application
    Filed: April 21, 2022
    Publication date: August 4, 2022
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Takeshi CHUJOH, Tomoya KODAMA
  • Patent number: 11381831
    Abstract: According to an embodiment, a decoding device includes an acquiring unit configured to acquire first format information, encoded data, and first filter information, the first format information indicating a resolution of a color-difference component of the encoded data; a decoding unit configured to decode the encoded data to obtain a decoded image; and a converting unit configured to convert a color-difference formal of the decoded image represented by a first color-difference format by using a filter identified by the filter information.
    Type: Grant
    Filed: February 23, 2021
    Date of Patent: July 5, 2022
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takeshi Chujoh, Tomoya Kodama
  • Patent number: 11381826
    Abstract: According to an embodiment, an encoding device includes an index setting unit and an encoding unit. The index setting unit generates a common index in which reference indices of one or more reference images included in a first index and a second index are sorted in a combination so as not to include a same reference image in accordance with a predetermined scanning order. The first index representing a combination of the one or more reference images referred to by a first reference image. The second index representing a combination of the one or more reference images referred to by a second reference image. The encoding unit encodes the common index.
    Type: Grant
    Filed: April 24, 2020
    Date of Patent: July 5, 2022
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akiyuki Tanizawa, Takeshi Chujoh, Taichiro Shiodera
  • Patent number: 11375218
    Abstract: According to an embodiment, an image coding method is for coding an image including a luminance component and color difference components. The method includes acquiring a reference image; and generating a predicted image by interpolating the luminance component and the color difference components in the reference image according to a motion vector. If a size of a block, which is designated as a unit of the interpolation, is equal to or smaller than a predetermined first threshold value, the generating includes inhibiting a bi-directional prediction, and performing only a uni-directional prediction to generate the predicted image according to the motion vector.
    Type: Grant
    Filed: May 4, 2020
    Date of Patent: June 28, 2022
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Takeshi Chujoh, Tomoo Yamakage
  • Patent number: 11363270
    Abstract: An encoding device includes a deriving unit and an encoding unit. The deriving unit is configured to derive a first reference value based on fixed point precision representing roughness of a weighting factor that is used for multiplying a reference image. The encoding unit is configured to encode a first difference value that is a difference value between the weighting factor and the first reference value and the fixed point precision. The weighting factor is included in a first range of predetermined bit precision having the first reference value at approximate center. The first difference value is in the predetermined range.
    Type: Grant
    Filed: April 10, 2020
    Date of Patent: June 14, 2022
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akiyuki Tanizawa, Takeshi Chujoh
  • Publication number: 20220182660
    Abstract: An apparatus includes an inter prediction unit configured to decode multiple reference picture list structures and to select one reference picture list structure from the multiple reference picture list structures on a per picture basis or on a per slice basis, wherein in the multiple reference picture list structures, the number of all reference pictures is one or more.
    Type: Application
    Filed: February 25, 2022
    Publication date: June 9, 2022
    Inventors: TAKESHI CHUJOH, TOMOHIRO IKAI, TOMOKO AONO, EIICHI SASAKI, TOMONORI HASHIMOTO, TIANYANG ZHOU, YUKINOBU YASUGI
  • Publication number: 20220182631
    Abstract: Provided is a video decoding apparatus for decoding coded data of a tile group in which a picture is split into rectangular regions, the tile group being composed of segments, the video decoding apparatus including: a header decoder configured to decode the number of tiles, a WPP enabled flag, and a slice enabled flag indicating whether segments in a target tile group are rectangular tiles, CTU rows, or slices from a tile group header, wherein the header decoder is configured to decode only one of the number of tiles being two or more, the WPP enabled flag being 1, and the slice enabled flag being 1 in one tile group.
    Type: Application
    Filed: February 7, 2020
    Publication date: June 9, 2022
    Inventors: Tomohiro IKAI, Tomoko AONO, Takeshi CHUJOH, Yukinobu YASUGI, Eiichi SASAKI