Patents by Inventor Akiyuki Tanizawa

Akiyuki Tanizawa 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).

  • Publication number: 20200296413
    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: Application
    Filed: June 2, 2020
    Publication date: September 17, 2020
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Taichiro Shiodera, Saori Asaka, Akiyuki Tanizawa, Takeshi Chujoh
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • Patent number: 10674161
    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: July 24, 2019
    Date of Patent: June 2, 2020
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akiyuki Tanizawa, Takeshi Chujoh, Taichiro Shiodera
  • Patent number: 10609376
    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: March 6, 2019
    Date of Patent: March 31, 2020
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akiyuki Tanizawa, Takeshi Chujoh
  • Patent number: 10602173
    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 22, 2019
    Date of Patent: March 24, 2020
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Akiyuki Tanizawa, Takeshi Chujoh
  • Publication number: 20200059656
    Abstract: A method of dividing an input image signal into pixel blocks, and performing inter-prediction on the divided pixel blocks. This method includes selecting predicted motion information from a motion information buffer storing motion information in an encoded region, and predicting motion information of an encoding target block by using the predicted motion information. The method further includes acquiring representative motion information from a plurality of items of motion information in an encoded region in accordance with first information indicating a method of selecting the predicted motion information, thereby obtaining only the representative motion information.
    Type: Application
    Filed: October 28, 2019
    Publication date: February 20, 2020
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Taichiro SHIODERA, Akiyuki TANIZAWA, Tomoo YAMAKAGE, Takeshi CHUJOH
  • Patent number: 10560717
    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: February 26, 2014
    Date of Patent: February 11, 2020
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Taichiro Shiodera, Saori Asaka, Akiyuki Tanizawa, Takeshi Chujoh
  • Patent number: 10542281
    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: August 30, 2018
    Date of Patent: January 21, 2020
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Taichiro Shiodera, Saori Asaka, Akiyuki Tanizawa, Takeshi Chujoh
  • Publication number: 20200012945
    Abstract: According to an embodiment, a learning method of optimizing a neural network, includes updating and specifying. In the updating, each of a plurality of weight coefficients included in the neural network is updated so that an objective function obtained by adding a basic loss function and an L2 regularization term multiplied by a regularization strength is minimized. In the specifying, an inactive node and an inactive channel are specified among a plurality of nodes and a plurality of channels included in the neural network.
    Type: Application
    Filed: February 27, 2019
    Publication date: January 9, 2020
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Atsushi YAGUCHI, Wataru ASANO, Shuhei NITTA, Yukinobu SAKATA, Akiyuki TANIZAWA