Patents by Inventor Kimihiko Kazui

Kimihiko Kazui 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: 20200359031
    Abstract: An information processing device includes: a memory; and a processor coupled to the memory and configured to: determine an angle of intra prediction for a block to be encoded in an image included in a video, and encode the block to be encoded using the angle of intra prediction; generate a bit value indicating an estimation result of the angle using a locally decoded pixel value of an encoded pixel adjacent to the block to be encoded; generate a bit string indicating the angle of intra prediction and generate flag information indicating whether a partial bit value of the bit string matches the bit value indicating an estimation result of the angle; and encode the flag information by a first encoding method and encode a remaining bit value of the bit string by a second encoding method.
    Type: Application
    Filed: July 24, 2020
    Publication date: November 12, 2020
    Applicant: FUJITSU LIMITED
    Inventors: Guillaume Denis Christian Barroux, KOHJI YAMADA, Akira NAKAGAWA, Kimihiko KAZUI
  • Patent number: 10827199
    Abstract: An apparatus includes: a processor configured to: execute temporal-scalable coding on input-video-image data at a first frame rate; convert the input-video-image data to video-image data of a second frame rate lower than the first frame rate; execute temporal-scalable coding on the video-image data of the second frame-rate and output a second encoding-complexity measure of a picture subjected to the temporal-scalable coding at the second frame-rate; correct, when the temporal-scalable coding is executed on the input-video-image data at the first frame-rate, a first encoding-complexity measure, estimated based on the second encoding-complexity of the picture and to be referenced for a picture to be encoded, of the picture to be encoded, based on a distance between the picture to be encoded and the picture to be referenced in a time direction; and execute the temporal-scalable coding on the input-video-image data at the first frame-rate based on the corrected first encoding-complexity measure.
    Type: Grant
    Filed: April 10, 2019
    Date of Patent: November 3, 2020
    Assignee: FUJITSU LIMITED
    Inventors: Xuying Lei, Hidenobu Miyoshi, Kimihiko Kazui
  • Publication number: 20200236393
    Abstract: A moving image encoding device includes a memory, and a processor coupled to the memory and configured to partition a picture edge block into sub-blocks so that none of the sub-blocks include an edge of a picture by partitioning the picture edge block into four or two, the picture edge block being a block including a horizontal or vertical edge of the picture among blocks of the picture, generate a prediction block by referring to another encoded picture or an encoded area of the picture for each of the sub-blocks, calculate a prediction error between a pixel of a given sub-block and a corresponding pixel of the prediction block corresponding to the given sub-block for each of the sub-blocks and encode the prediction error, and add partitioning information indicating whether the picture edge block has been partitioned into four or two, to encoded moving image data.
    Type: Application
    Filed: April 7, 2020
    Publication date: July 23, 2020
    Applicant: FUJITSU LIMITED
    Inventors: Kenshiro Takeuchi, Guillaume Denis Christian Barroux, Kimihiko KAZUI
  • Publication number: 20200177907
    Abstract: A video encoding apparatus appends decoding delay and display delay correction information to encoded video data in order to ensure that even when one or more pictures that are later in encoding order than a starting encoded picture in a video data stream to be spliced to a trailing end of another encoded video data stream have been discarded from among pictures contained in the video data stream, the starting encoded picture and its subsequent pictures can be continuously decoded and displayed by a video decoding apparatus. The correction information is calculated based on a decoding interval between each discarded picture and a picture that immediately precedes the discarded picture. The video decoding apparatus corrects the decoding delay and display delay of the starting encoded picture and its subsequent pictures by using the calculated correction information.
    Type: Application
    Filed: February 10, 2020
    Publication date: June 4, 2020
    Applicant: FUJITSU LIMITED
    Inventors: Kimihiko KAZUI, Junpei KOYAMA, Satoshi SHIMADA
  • Patent number: 10638155
    Abstract: An apparatus for a video encoding process executes a difference process for calculating a difference value between corresponding pixels of a first reference block on a first encoded reference picture in a first direction and a second reference block on a second encoded reference picture in a second direction; executes a predictive process for generating a predictive block by calculating a pixel value of the predictive block in accordance with the bi-predictive mode for each pixel in which an absolute value of the difference value is less than a threshold value, and by calculating the pixel value of the predictive block based on a value of the corresponding pixel of one of the first reference block and the second reference block for each pixel in which the absolute value of the difference value is the threshold value or more.
    Type: Grant
    Filed: December 11, 2017
    Date of Patent: April 28, 2020
    Assignee: FUJITSU LIMITED
    Inventors: Kenshiro Takeuchi, Kimihiko Kazui, Satoshi Shimada, Hidenobu Miyoshi, Guillaume Denis Christian Barroux
  • Patent number: 10582208
    Abstract: A video encoding apparatus appends decoding delay and display delay correction information to encoded video data in order to ensure that even when one or more pictures that are later in encoding order than a starting encoded picture in a video data stream to be spliced to a trailing end of another encoded video data stream have been discarded from among pictures contained in the video data stream, the starting encoded picture and its subsequent pictures can be continuously decoded and displayed by a video decoding apparatus. The correction information is calculated based on a decoding interval between each discarded picture and a picture that immediately precedes the discarded picture. The video decoding apparatus corrects the decoding delay and display delay of the starting encoded picture and its subsequent pictures by using the calculated correction information.
    Type: Grant
    Filed: February 4, 2016
    Date of Patent: March 3, 2020
    Assignee: FUJITSU LIMITED
    Inventors: Kimihiko Kazui, Junpei Koyama, Satoshi Shimada
  • Publication number: 20190335204
    Abstract: An apparatus includes: a processor configured to: execute temporal-scalable coding on input-video-image data at a first frame rate; convert the input-video-image data to video-image data of a second frame rate lower than the first frame rate; execute temporal-scalable coding on the video-image data of the second frame-rate and output a second encoding-complexity measure of a picture subjected to the temporal-scalable coding at the second frame-rate; correct, when the temporal-scalable coding is executed on the input-video-image data at the first frame-rate, a first encoding-complexity measure, estimated based on the second encoding-complexity of the picture and to be referenced for a picture to be encoded, of the picture to be encoded, based on a distance between the picture to be encoded and the picture to be referenced in a time direction; and execute the temporal-scalable coding on the input-video-image data at the first frame-rate based on the corrected first encoding-complexity measure.
    Type: Application
    Filed: April 10, 2019
    Publication date: October 31, 2019
    Applicant: FUJITSU LIMITED
    Inventors: XUYING LEI, Hidenobu MIYOSHI, Kimihiko KAZUI
  • Patent number: 10448034
    Abstract: A video image decoding device executes a separation process for extracting, from encoded video image data including multiple images, first encoded data obtained by encoding reduced images of first images included in the multiple images, and second encoded data obtained by encoding second images included in the multiple images, executes a first decoding process for decoding the reduced images of the first images from the first encoded data, executes a second decoding process for decoding the second images from the second encoded data, executes a recording process that includes recording first region included in the reduced images, the first region including motions with respect to the second images immediately preceding the first images, and executes a synthesis process for reproducing the multiple images by modifying second region in the second images immediately preceding the first images in accordance with the first region.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: October 15, 2019
    Assignee: FUJITSU LIMITED
    Inventor: Kimihiko Kazui
  • Patent number: 10440370
    Abstract: An apparatus for image coding includes a processor to: execute a determining process that includes, when a specific entry included in a first palette for use in coding a first block in a coding-target image is not an entry candidate for a second palette for use in coding a second block to be coded after the first block, determining an entry to be included in the second palette based on a first index indicating a code amount to be generated when the specific entry is to be included in the second palette and a second index indicating a code amount to be generated when the specific entry is not to be included in the second palette; execute a generating process that includes generating the second palette including the entry determined in the determining process; and execute a palette coding process that includes coding the second block by the second palette.
    Type: Grant
    Filed: February 13, 2017
    Date of Patent: October 8, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Junpei Koyama, Kimihiko Kazui
  • Patent number: 10397582
    Abstract: An association circuit determines whether a first pixel in an image will be associated with an entry in a palette, based on a threshold for a difference between a pixel value and a palette value. An addition circuit adds an entry to the palette when the first pixel is not associated with an entry. A fusion circuit fuses two entries so as to generate a fused entry when a condition of a target amount of information is not satisfied by adding an entry. A control circuit changes the threshold when the first pixel is associated with an entry, when an entry is added, or when the fused entry is generated and an entry is added. The association circuit determines whether a second pixel in the image will be associated with an entry, based on the changed threshold. A palette encoding circuit encodes the image by using the palette.
    Type: Grant
    Filed: October 12, 2016
    Date of Patent: August 27, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Guillaume Denis Christian Barroux, Kimihiko Kazui
  • Patent number: 10375392
    Abstract: A video encoding apparatus corrects filter coefficients of an in-loop filter applied to an encoded reference block adjacent to a block to be encoded, based on a quantization value applied to the reference block and a quantization value applied to the block to be encoded when a mode of an in-loop filter applied to the block to be encoded is same as a mode of the in-loop filter applied to the reference block, uses the corrected filter coefficients to apply the in-loop filter to a locally-decoded block that is obtained by encoding the block to be encoded once and decoding the encoded block to be encoded, and adds, to encoded data of the block to be encoded, information indicating that the block to be encoded refers to the reference block for the in-loop filter.
    Type: Grant
    Filed: December 11, 2017
    Date of Patent: August 6, 2019
    Assignee: FUJITSU LIMITED
    Inventor: Kimihiko Kazui
  • Publication number: 20190200033
    Abstract: Embodiments of this disclosure provide an image encoding/decoding methods and apparatuses and an image processing equipment. The image encoding method includes: determining a search sub-region of a current encoding unit from a plurality of sub-regions of a search region according to one or more motion vectors of one or more encoded units; obtaining one or more motion vectors of the current encoding unit based on the search sub-region; calculating residual information on the current encoding unit according to the motion vectors; and encoding the residual information on the current encoding unit into a bit stream. Hence, the search region may be reduced, and the number of search points may be lowered, thereby shortening PMMVD encoding/decoding time.
    Type: Application
    Filed: February 27, 2019
    Publication date: June 27, 2019
    Applicant: FUJITSU LIMITED
    Inventors: Xuan FU, Guillaume BARROUX, Kimihiko KAZUI
  • Publication number: 20190166373
    Abstract: An image encoding/decoding method and apparatus and image processing equipment, in which encoding/decoding is/are performed on a plurality of sub-predicting units of a predicting unit in an intra prediction manner. The image encoding method includes: determining a prediction mode of the predicting unit; respectively calculating residual information on the plurality of sub-predicting units of the predicting unit; and encoding information on the prediction mode of the predicting unit and the residual information on the plurality of sub-predicting units into a bit steam. Hence, an intra prediction result may be provided more accurately without increasing overmuch encoding cost.
    Type: Application
    Filed: January 30, 2019
    Publication date: May 30, 2019
    Applicant: FUJITSU LIMITED
    Inventors: Jianqing ZHU, Zheng WANG, Kimihiko KAZUI
  • Patent number: 10250891
    Abstract: A storage circuit stores a decoded image of a coded image that is coded before a coding target image included in a video to which the still-image coding and the video coding are applied. A video coding circuit codes the coding target image by inter prediction coding that uses the decoded image as a reference image when the still-image coding is applied to the mage that is one image previous to the coding target image and the video coding is applied to the coding target image.
    Type: Grant
    Filed: March 14, 2016
    Date of Patent: April 2, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Kimihiko Kazui, Kohji Yamada
  • Publication number: 20190052882
    Abstract: A first encoder divides an encoding target image included in a video into a plurality of blocks, and encodes each of the plurality of blocks by performing a prediction coding by use of filtering processing. A second encoder encodes a parameter that represents a direction of a line of pixels in the filtering processing. Here, when an encoding target block that is one of the plurality of blocks has a rectangular shape, the second encoder changes, according to a direction of a long side of the rectangular shape, a process of encoding the parameter.
    Type: Application
    Filed: August 6, 2018
    Publication date: February 14, 2019
    Applicant: FUJITSU LIMITED
    Inventors: Guillaume Denis Christian Barroux, Kimihiko KAZUI, Kenshiro Takeuchi
  • Patent number: 10116962
    Abstract: A generation circuit generates first palette information from a decoded image of a first block used for predicting second palette information of a second block in a coding target image when the first block has not received palette coding. A storage circuit stores the first palette information. A coding circuit performs prediction coding on the second palette information by using the first palette information so as to generate coded palette information.
    Type: Grant
    Filed: September 7, 2016
    Date of Patent: October 30, 2018
    Assignee: FUJITSU LIMITED
    Inventors: Kimihiko Kazui, Jianqing Zhu
  • Patent number: 10070144
    Abstract: A video encoding apparatus appends decoding delay correction information and display delay correction information to encoded video data in order to ensure that even when one or more pictures that are later in encoding order in the video data than a first picture that may potentially be spliced to a trailing end of other encoded video data have been discarded, the first picture and subsequent pictures in the encoded video data can be continuously decoded and displayed by a video decoding apparatus. The video decoding apparatus corrects the decoding delay and display delay of the first picture and its subsequent pictures by using the decoding delay correction information and display delay correction information.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: September 4, 2018
    Assignee: FUJITSU LIMITED
    Inventors: Kimihiko Kazui, Satoshi Shimada, Junpei Koyama
  • Patent number: 10051273
    Abstract: A video decoder decoding an encoded stream includes a parallel entropy decoding part to entropy decode the stream of blocks in block lines in parallel, a parallel QP prediction part to compute prediction values of the blocks in the block lines in parallel, and a parallel decoding processing part to generate decoded pixels of the blocks in the block lines in parallel, the decoded pixel being obtained utilizing data decoded by the parallel entropy decoding part and the prediction value. When performing computing processing in parallel per unit of N block lines, the processing is performed on a processing block in a (K?1)th block line preceding a processing block in a Kth block line by at least one block in a horizontal position to compute the prediction value of the processing block by referring to a block already processed corresponding to the processing block.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: August 14, 2018
    Assignee: FUJITSU LIMITED
    Inventors: Satoshi Shimada, Kimihiko Kazui, Junpei Koyama, Akira Nakagawa
  • Publication number: 20180184116
    Abstract: An apparatus for a video encoding process executes a difference process for calculating a difference value between corresponding pixels of a first reference block on a first encoded reference picture in a first direction and a second reference block on a second encoded reference picture in a second direction; executes a predictive process for generating a predictive block by calculating a pixel value of the predictive block in accordance with the bi-predictive mode for each pixel in which an absolute value of the difference value is less than a threshold value, and by calculating the pixel value of the predictive block based on a value of the corresponding pixel of one of the first reference block and the second reference block for each pixel in which the absolute value of the difference value is the threshold value or more.
    Type: Application
    Filed: December 11, 2017
    Publication date: June 28, 2018
    Applicant: FUJITSU LIMITED
    Inventors: Kenshiro Takeuchi, Kimihiko KAZUI, Satoshi SHIMADA, Hidenobu MIYOSHI, Guillaume Denis Christian Barroux
  • Publication number: 20180184087
    Abstract: A video encoding apparatus corrects filter coefficients of an in-loop filter applied to an encoded reference block adjacent to a block to be encoded, based on a quantization value applied to the reference block and a quantization value applied to the block to be encoded when a mode of an in-loop filter applied to the block to be encoded is same as a mode of the in-loop filter applied to the reference block, uses the corrected filter coefficients to apply the in-loop filter to a locally-decoded block that is obtained by encoding the block to be encoded once and decoding the encoded block to be encoded, and adds, to encoded data of the block to be encoded, information indicating that the block to be encoded refers to the reference block for the in-loop filter.
    Type: Application
    Filed: December 11, 2017
    Publication date: June 28, 2018
    Applicant: FUJITSU LIMITED
    Inventor: Kimihiko KAZUI