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: 10341676
    Abstract: A video encoding apparatus is a video encoding apparatus for subjecting a video image to motion compensated prediction coding, comprising an acquisition module to acquire available blocks of blocks having motion vectors from encoded blocks adjacent to a to-be-encoded block and number of the available blocks, an acquisition/selection module to select one selection block from the encoded available blocks, a selection information encoder to encode selection information specifying the selection block using a code table corresponding to the number of available blocks, and an image encoder to subject the to-be-encoded block to motion compensated prediction coding using a motion vector of the selection block.
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: July 2, 2019
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Saori Asaka, Takeshi Chujoh, Akiyuki Tanizawa, Goki Yasuda, Naofumi Wada, Takashi Watanabe
  • Patent number: 10341660
    Abstract: According to an embodiment, a video compression apparatus includes a first compressor, a second compressor, a partitioner and a communicator. The first compressor compresses a first video to generate a first bitstream. The second compressor sets regions in a second video and compresses the regions so as to enable each region to be independently decoded, to generate a second bitstream. The partitioner partitions the second bitstream according to the set regions to obtain a partitioned second bitstream. The communicator receives region information indicating a specific region that corresponds to one or more regions and selects and transmits a bitstream corresponding to the specific region from the partitioned second bitstream.
    Type: Grant
    Filed: August 26, 2015
    Date of Patent: July 2, 2019
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Akiyuki Tanizawa, Tomoya Kodama, Takeshi Chujoh, Shunichi Gondo, Wataru Asano, Takayuki Itoh
  • Publication number: 20190200019
    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: March 6, 2019
    Publication date: June 27, 2019
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akiyuki TANIZAWA, Takeshi CHUJOH
  • Publication number: 20190191175
    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 22, 2019
    Publication date: June 20, 2019
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Akiyuki TANIZAWA, Takeshi Chujoh
  • Publication number: 20190158868
    Abstract: A video encoding apparatus is a video encoding apparatus for subjecting a video image to motion compensated prediction coding, comprising an acquisition module to acquire available blocks of blocks having motion vectors from encoded blocks adjacent to a to-be-encoded block and number of the available blocks, an acquisition/selection module to select one selection block from the encoded available blocks, a selection information encoder to encode selection information specifying the selection block using a code table corresponding to the number of available blocks, and an image encoder to subject the to-be-encoded block to motion compensated prediction coding using a motion vector of the selection block.
    Type: Application
    Filed: January 23, 2019
    Publication date: May 23, 2019
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Saori ASAKA, Takeshi CHUJOH, Akiyuki TANIZAWA, Goki YASUDA, Naofumi WADA, Takashi WATANABE
  • Publication number: 20190158862
    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: January 24, 2019
    Publication date: May 23, 2019
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Takeshi CHUJOH, Tomoya KODAMA
  • Patent number: 10298651
    Abstract: According to an embodiment, an encoding device includes a storage controller, a difference generator, and a communication controller. The storage controller is configured to store a base stream in a storage. The base stream serves as basis for encoding and decoding and is shared with a decoding device. The difference generator is configured to generate a difference bit stream that represents difference between an input bit stream that has been input and the base stream. The communication controller is configured to control a communicating unit to transmit the difference bit stream.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: May 21, 2019
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Shunichi Gondo, Takeshi Chujoh
  • Publication number: 20190149840
    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: Application
    Filed: January 17, 2019
    Publication date: May 16, 2019
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Taichiro Shiodera, Saori Asaka, Akiyuki Tanizawa, Takeshi Chujoh
  • Patent number: 10277900
    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: Grant
    Filed: February 21, 2017
    Date of Patent: April 30, 2019
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Akiyuki Tanizawa, Takeshi Chujoh
  • Patent number: 10271061
    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: Grant
    Filed: February 15, 2017
    Date of Patent: April 23, 2019
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Akiyuki Tanizawa, Takeshi Chujoh
  • Patent number: 10257516
    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: Grant
    Filed: February 21, 2017
    Date of Patent: April 9, 2019
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Akiyuki Tanizawa, Takeshi Chujoh
  • Patent number: 10250898
    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: April 20, 2018
    Date of Patent: April 2, 2019
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takeshi Chujoh, Tomoya Kodama
  • Publication number: 20190098334
    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: Application
    Filed: August 30, 2018
    Publication date: March 28, 2019
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Taichiro SHIODERA, Saori ASAKA, Akiyuki TANIZAWA, Takeshi CHUJOH
  • Patent number: 10212436
    Abstract: According to an embodiment, an image encoding apparatus includes a background control information generator, a background image generator, and an image encoder. The background control information generator generates background control information based on an input image. The background control information is used for generating a first background image from at least one first image. The background image generator generates the first background image, based on the background control information and at least one first image. The image encoder encodes the input image using the first background image to generate encoded data.
    Type: Grant
    Filed: October 7, 2015
    Date of Patent: February 19, 2019
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akiyuki Tanizawa, Takeshi Chujoh, Tomoya Kodama, Shunichi Gondo, Hiroyuki Kobayashi
  • Patent number: 10187642
    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: August 17, 2017
    Date of Patent: January 22, 2019
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Akiyuki Tanizawa, Takeshi Chujoh, Taichiro Shiodera
  • Publication number: 20180367803
    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: August 27, 2018
    Publication date: December 20, 2018
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akiyuki TANIZAWA, Takeshi Chujoh, Taichiro Shiodera
  • Patent number: 10110904
    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: August 17, 2017
    Date of Patent: October 23, 2018
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akiyuki Tanizawa, Takeshi Chujoh, Taichiro Shiodera
  • Patent number: 10091525
    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: September 8, 2017
    Date of Patent: October 2, 2018
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Taichiro Shiodera, Saori Asaka, Akiyuki Tanizawa, Takeshi Chujoh
  • Publication number: 20180242010
    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 20, 2018
    Publication date: August 23, 2018
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Takeshi CHUJOH, Tomoya KODAMA
  • Patent number: 10057584
    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: August 17, 2017
    Date of Patent: August 21, 2018
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Akiyuki Tanizawa, Takeshi Chujoh, Taichiro Shiodera