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).

  • IMAGE DECODING APPARATUS AND IMAGE CODING APPARATUS
    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
  • Image encoding method and image decoding method
    Patent number: 10779001
    Abstract: According to one embodiment, an image encoding method includes selecting a motion reference block from an encoded pixel block to which an inter prediction is applied. The method includes selecting one or more available blocks from the motion reference block. The method includes selecting a selection block from the available blocks. The method includes generating a predicted image of the encoding target block using motion information of the selection block. The method includes encoding a prediction error between the predicted image and an original image. The method includes encoding selection information specifying the selection block by referring to a code table decided according to a number of the available blocks.
    Type: Grant
    Filed: January 17, 2019
    Date of Patent: September 15, 2020
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Taichiro Shiodera, Saori Asaka, Akiyuki Tanizawa, Takeshi Chujoh
  • IMAGE CODING METHOD, IMAGE DECODING METHOD, IMAGE CODING APPARATUS, AND IMAGE DECODING APPARATUS
    Publication number: 20200267400
    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: May 4, 2020
    Publication date: August 20, 2020
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Takeshi CHUJOH, Tomoo Yamakage
  • IMAGE CODING METHOD, IMAGE DECODING METHOD, IMAGE CODING APPARATUS, AND IMAGE DECODING APPARATUS
    Publication number: 20200267401
    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: May 4, 2020
    Publication date: August 20, 2020
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Takeshi CHUJOH, Tomoo YAMAKAGE
  • ENCODING DEVICE, DECODING DEVICE, ENCODING METHOD, AND DECODING METHOD
    Publication number: 20200252625
    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: April 24, 2020
    Publication date: August 6, 2020
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akiyuki TANIZAWA, Takeshi CHUJOH, Taichiro SHIODERA
  • ENCODING DEVICE, DECODING DEVICE, ENCODING METHOD, AND DECODING METHOD
    Publication number: 20200252626
    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: April 24, 2020
    Publication date: August 6, 2020
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akiyuki TANIZAWA, Takeshi Chujoh, Taichiro Shiodera
  • ENCODING DEVICE, DECODING DEVICE, ENCODING METHOD, AND DECODING METHOD
    Publication number: 20200252624
    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: April 24, 2020
    Publication date: August 6, 2020
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akiyuki TANIZAWA, Takeshi CHUJOH, Taichiro SHIODERA
  • ENCODING DEVICE, DECODING DEVICE, ENCODING METHOD, AND DECODING METHOD
    Publication number: 20200252628
    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: April 24, 2020
    Publication date: August 6, 2020
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akiyuki TANIZAWA, Takeshi Chujoh, Taichiro Shiodera
  • ENCODING DEVICE, DECODING DEVICE, ENCODING METHOD, AND DECODING METHOD
    Publication number: 20200252623
    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: April 24, 2020
    Publication date: August 6, 2020
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akiyuki Tanizawa, Takeshi Chujoh, Taichiro Shiodera
  • ENCODING DEVICE, DECODING DEVICE, ENCODING METHOD, AND DECODING METHOD FOR CODING EFFICIENCY
    Publication number: 20200244964
    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 10, 2020
    Publication date: July 30, 2020
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akiyuki TANIZAWA, Takeshi Chujoh
  • Decoding device and encoding device
    Patent number: 10728566
    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: Grant
    Filed: January 24, 2019
    Date of Patent: July 28, 2020
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takeshi Chujoh, Tomoya Kodama
  • VALUE LIMITING FILTER APPARATUS, VIDEO CODING APPARATUS, AND VIDEO DECODING APPARATUS
    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
  • Image encoding method and image decoding method
    Patent number: 10715828
    Abstract: According to one embodiment, an image encoding method includes selecting a motion reference block from an already-encoded pixel block. The method includes selecting an available block including different motion information from the motion reference block, and selecting a selection block from the available block. The method includes generating a predicted image of the encoding target block using motion information of the selection block. The method includes encoding a prediction error between the predicted image and an original image. The method includes encoding selection information identifying the selection block by referring to a code table decided according to a number of the available block.
    Type: Grant
    Filed: September 7, 2017
    Date of Patent: July 14, 2020
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Taichiro Shiodera, Saori Asaka, Akiyuki Tanizawa, Takeshi Chujoh
  • Image coding method, image decoding method, image coding apparatus, and image decoding apparatus
    Patent number: 10687072
    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: October 21, 2019
    Date of Patent: June 16, 2020
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Takeshi Chujoh, Tomoo Yamakage
  • ENCODING DEVICE, DECODING DEVICE, ENCODING METHOD, AND DECODING METHOD FOR CODING EFFICIENCY
    Publication number: 20200186804
    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: February 14, 2020
    Publication date: June 11, 2020
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akiyuki TANIZAWA, Takeshi CHUJOH
  • ENCODING DEVICE, DECODING DEVICE, ENCODING METHOD, AND DECODING METHOD FOR EFFICIENT CODING
    Publication number: 20200177905
    Abstract: According to an embodiment, an encoding device includes: an index setting unit sets an index that represents information of a reference image and a weighting factor; an index reconfiguring unit predicts a reference value of the weighting factor, wherein the reference value indicates a factor to be set if a difference of pixel value between a reference image and a target image to be encoded is less than or equal to a specific value; and an entropy encoding unit encodes a difference value between the weighting factor and the reference value.
    Type: Application
    Filed: February 7, 2020
    Publication date: June 4, 2020
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Akiyuki TANIZAWA, Takeshi CHUJOH
  • VIDEO ENCODING DEVICE AND VIDEO DECODING DEVICE
    Publication number: 20200177911
    Abstract: In a case of referring to information between pictures by means of inter prediction, the entire picture needs to be decoded even in a case of decoding a small region. In a case of referring to information within a picture by means of intra prediction, referring to information across a tile boundary is not possible. In a case that a pixel pointed by a sub-block level motion vector of a target block that is calculated by scaling based on an available motion vector acquired from a spatial neighboring block or a temporal neighboring block is not present within a tile sequence, a process of replacing the pixel value with a pixel value within the tile sequence is performed. In a case of referring to a pixel outside of a tile by means of intra prediction, a process of replacing the pixel value with that of a pixel within the tile is performed.
    Type: Application
    Filed: June 27, 2018
    Publication date: June 4, 2020
    Inventors: Tomoko AONO, Tomohiro IKAI, Takeshi CHUJOH, Tomonori HASHIMOTO, Yukinobu YASUGI
  • ENCODING DEVICE, DECODING DEVICE, ENCODING METHOD, AND DECODING METHOD FOR EFFICIENT CODING
    Publication number: 20200177903
    Abstract: According to an embodiment, an encoding device includes: an index setting unit sets an index that represents information of a reference image and a weighting factor; an index reconfiguring unit predicts a reference value of the weighting factor, wherein the reference value indicates a factor to be set if a difference of pixel value between a reference image and a target image to be encoded is less than or equal to a specific value; and an entropy encoding unit encodes a difference value between the weighting factor and the reference value.
    Type: Application
    Filed: February 7, 2020
    Publication date: June 4, 2020
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Akiyuki TANIZAWA, Takeshi CHUJOH
  • VIDEO DECODING DEVICE AND VIDEO ENCODING DEVICE
    Publication number: 20200177922
    Abstract: A video decoding device includes a subpicture decoder(s) configured to decode respective subpictures, and a picture combining unit configured to compose the subpictures decoded into a picture such that the subpictures are allowed to overlap with each other.
    Type: Application
    Filed: May 24, 2018
    Publication date: June 4, 2020
    Inventors: Takeshi CHUJOH, Tomohiro IKAI
  • ENCODING DEVICE, DECODING DEVICE, ENCODING METHOD, AND DECODING METHOD FOR EFFICIENT CODING
    Publication number: 20200177904
    Abstract: According to an embodiment, an encoding device includes: an index setting unit sets an index that represents information of a reference image and a weighting factor; an index reconfiguring unit predicts a reference value of the weighting factor, wherein the reference value indicates a factor to be set if a difference of pixel value between a reference image and a target image to be encoded is less than or equal to a specific value; and an entropy encoding unit encodes a difference value between the weighting factor and the reference value.
    Type: Application
    Filed: February 7, 2020
    Publication date: June 4, 2020
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Akiyuki TANIZAWA, Takeshi CHUJOH