Patents by Inventor Takeshi Tsukuba

Takeshi Tsukuba 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: 10075720
    Abstract: The processing amount and coding amount related to decoding/coding of profile information and level information are reduced. The profile/level information decoded by a PTL (profile/level) information decoder (1021) is specified by the semantics of an i-th reference PTL information specifying index at a relative position between i-th profile/level information and referenced profile/level information.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: September 11, 2018
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Takeshi Tsukuba, Tomohiro Ikai, Tomoyuki Yamamoto
  • Publication number: 20180205956
    Abstract: A prediction set determining section selects a prediction set from a prediction set group including a plurality of prediction sets having different combinations of prediction modes corresponding to different prediction directions. Further, a prediction mode determining section selects a prediction mode from the prediction set thus selected. An entropy encoding section encodes the prediction set thus selected, the prediction mode thus selected, and residual data between an input image and a predicted image formed on the basis of the prediction set and the prediction mode. This allows an image encoding device to carry out predictions from more various angles, thereby improving prediction efficiency.
    Type: Application
    Filed: March 13, 2018
    Publication date: July 19, 2018
    Inventors: Takeshi TSUKUBA, Yasuaki TOKUMO
  • Publication number: 20180199064
    Abstract: An image decoding device includes an illumination compensation flag derivation section that derives an illumination compensation flag indicating whether illumination compensation is executed and an illumination compensation section (3093) that generates a predicted image of a target prediction unit using illumination change parameters derived from an image in a neighbor of the target prediction unit on a target image and a reference region image of a reference image corresponding to the target prediction unit in a case where the illumination compensation flag is a value indicating validity. In a case where a prediction unit which is a generation target of the predicted image is in a merge mode, the illumination compensation flag derivation section decodes the illumination compensation flag from coded data.
    Type: Application
    Filed: March 7, 2018
    Publication date: July 12, 2018
    Inventors: Tomohiro IKAI, Yoshiya YAMAMOTO, Takeshi TSUKUBA
  • Publication number: 20180192076
    Abstract: A method of reducing information about the residual in a partial region and a method of switching prediction blocks and transform blocks with a high degree of freedom by quadtree partitioning are combined to realize an efficient coding/decoding process. In an image decoding device that decodes by partitioning a picture into coding tree block units, there are provided: a coding tree partitioning section that recursively partitions the coding tree block as a root coding tree; a CU partitioning flag decoding section that decodes a coding unit partitioning flag indicating whether or not to partition the coding tree; and a residual mode decoding section that decodes a residual mode indicating whether to decode a residual of the coding tree and below in a first mode, or in a second mode different from the first mode.
    Type: Application
    Filed: June 2, 2016
    Publication date: July 5, 2018
    Inventors: Tomohiro IKAI, Takeshi TSUKUBA
  • Publication number: 20180160144
    Abstract: The amount of processing is reduced with high coding efficiency maintained. There is provided an arithmetic decoding device including syntax decoding means for decoding each of at least a first syntax element and a second syntax element indicating a transform coefficient using arithmetic decoding with a context or arithmetic decoding without a context. The syntax decoding means performs decoding that at least includes not decoding the first syntax element and decoding the second syntax element using the arithmetic decoding without a context, and decoding the first syntax element using the arithmetic decoding with a context and decoding the second syntax element using the arithmetic decoding without a context.
    Type: Application
    Filed: February 1, 2018
    Publication date: June 7, 2018
    Inventors: Tomohiro IKAI, Yukinobu YASUGI, Tomoyuki YAMAMOTO, Takeshi TSUKUBA
  • Publication number: 20180160118
    Abstract: The decoding processing amount is reduced. An increase of the number of contexts relating to a CU split identifier is suppressed while coding efficiency is maintained. In addition, context index derivation processing regarding a CU split identifier is simplified. An arithmetic decoding device includes context index deriving means for deriving a context index for designating a context, arithmetic code decoding means for decoding a Bin sequence configured by one or a plurality of Bins, from coded data with reference to a bypass flag and the context designated by the context index, and CU split identifier decoding means for decoding a syntax value of a CU split identifier relating to a target CU, from the Bin sequence. The context index deriving means derives the context index relating to the CU split identifier, based on a split depth of the target CU and split depths of one or more decoded neighboring CUs.
    Type: Application
    Filed: May 13, 2016
    Publication date: June 7, 2018
    Inventors: Takeshi TSUKUBA, Tomohiro IKAI
  • Publication number: 20180139465
    Abstract: An image decoding device is equipped with a header information decoding means for decoding profile/level information included in a video parameter set after decoding byte-aligned 16-bit extension information (next_essential_info_byte_offset) in the video parameter set.
    Type: Application
    Filed: December 28, 2017
    Publication date: May 17, 2018
    Inventors: Takeshi TSUKUBA, Tomoyuki YAMAMOTO, Tomohiro IKAI, Yukinobu YASUGI, Sachin G. DESHPANDE
  • Publication number: 20180115780
    Abstract: A hierarchical moving image decoding device (1) includes an inter-layer reference image list setting section (155) that derives an inter-layer reference image list and an inter-layer reference image set used in pictures on a specific target layer based on a parameter set of a target layer.
    Type: Application
    Filed: November 30, 2017
    Publication date: April 26, 2018
    Inventors: Tomoyuki YAMAMOTO, Tomohiro IKAI, Takeshi TSUKUBA, Yukinobu YASUGI
  • Patent number: 9955171
    Abstract: A prediction set determining section selects a prediction set from a prediction set group including a plurality of prediction sets having different combinations of prediction modes corresponding to different prediction directions. Further, a prediction mode determining section selects a prediction mode from the prediction set thus selected. An entropy encoding section encodes the prediction set thus selected, the prediction mode thus selected, and residual data between an input image and a predicted image formed on the basis of the prediction set and the prediction mode. This allows an image encoding device to carry out predictions from more various angles, thereby improving prediction efficiency.
    Type: Grant
    Filed: May 1, 2017
    Date of Patent: April 24, 2018
    Assignee: VELOS MEDIA, LLC.
    Inventors: Takeshi Tsukuba, Yasuaki Tokumo
  • Patent number: 9948951
    Abstract: An image decoding device includes an illumination compensation flag derivation section that derives an illumination compensation flag indicating whether illumination compensation is executed and an illumination compensation section (3093) that generates a predicted image of a target prediction unit using illumination change parameters derived from an image in a neighbor of the target prediction unit on a target image and a reference region image of a reference image corresponding to the target prediction unit in a case where the illumination compensation flag is a value indicating validity. In a case where a prediction unit which is a generation target of the predicted image is in a merge mode, the illumination compensation flag derivation section decodes the illumination compensation flag from coded data.
    Type: Grant
    Filed: November 28, 2013
    Date of Patent: April 17, 2018
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Tomohiro Ikai, Yoshiya Yamamoto, Takeshi Tsukuba
  • Patent number: 9912959
    Abstract: A hierarchical moving image decoding device (1) includes an inter-layer reference image list setting section (155) that derives an inter-layer reference image list and an inter-layer reference image set used in pictures on a specific target layer based on a parameter set of a target layer.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: March 6, 2018
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tomoyuki Yamamoto, Tomohiro Ikai, Takeshi Tsukuba, Yukinobu Yasugi
  • Publication number: 20180063541
    Abstract: A reference picture information decoding unit (13) omits decoding of a reference list sorting presence or absence flag and/or a reference list sorting order based on the number of current picture referable pictures.
    Type: Application
    Filed: October 20, 2017
    Publication date: March 1, 2018
    Inventors: Tomoyuki Yamamoto, Tomohiro Ikai, Yukinobu Yasugi, Takeshi Tsukuba
  • Patent number: 9894373
    Abstract: An image decoding device is equipped with a header information decoding means for decoding profile/level information included in a video parameter set after decoding byte-aligned 16-bit extension information (next_essential_info_byte_offset) in the video parameter set.
    Type: Grant
    Filed: September 12, 2013
    Date of Patent: February 13, 2018
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Takeshi Tsukuba, Tomoyuki Yamamoto, Tomohiro Ikai, Yukinobu Yasugi, Sachin G. Deshpande
  • Publication number: 20180041762
    Abstract: Motion-vector deriving processing using inter-view shift prediction according to the related art makes processing for determining a reference position complicated. In a sequence parameter set, it is not possible to independently set an ON/OFF flag of a texture extension tool and an ON/OFF flag of a depth extension tool. Additionally, even in a case in which only one of an intra SDC wedge segmentation flag IntraSdcWedgeFlag and an intra contour segmentation flag IntraContourFlag is 1, depth_intra_mode_flag for selecting one of the wedge segmentation mode and the contour segmentation mode is unnecessarily decoded. A prediction-vector deriving device derives the coordinates of a reference block of an inter-view merge candidate IV from the sum of the top-left coordinates of a target block, half the size of the target block, and a disparity vector of the target block which is converted into the integer precision. In this case, the value of the sum is normalized to a multiple of 8 or a multiple of 16.
    Type: Application
    Filed: January 28, 2016
    Publication date: February 8, 2018
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Tomohiro IKAI, Takeshi TSUKUBA
  • Patent number: 9866856
    Abstract: A reference picture information decoding unit (13) omits decoding of a reference list sorting presence or absence flag and/or a reference list sorting order based on the number of current picture referable pictures.
    Type: Grant
    Filed: February 1, 2016
    Date of Patent: January 9, 2018
    Assignee: Dolby International AB
    Inventors: Tomoyuki Yamamoto, Tomohiro Ikai, Yukinobu Yasugi, Takeshi Tsukuba
  • Patent number: 9813713
    Abstract: A coefficient presence/absence flag decoding unit, included in a quantized residual information decoding unit which reduces a processing amount related to coding and decoding of a transform coefficient, splits a target frequency domain or a target pixel domain into sub-blocks, and derives different context indexes with respect to each transform coefficient in a pixel domain, obtained through a transform skip or a transform/quantization bypass, and each transform coefficient which is obtained for each frequency component through frequency transform.
    Type: Grant
    Filed: October 19, 2016
    Date of Patent: November 7, 2017
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Takeshi Tsukuba, Tomohiro Ikai, Tomoyuki Yamamoto
  • Publication number: 20170302934
    Abstract: There is provided a terminal device capable of efficiently performing communication in a communication system in which a base station device and the terminal device communicate with each other. The terminal device that communicates with the base station device by using a plurality of aggregated cells recognizes that a serving cell is stopped in a first state, recognizes that the serving cell is started in a second state, and switches from the first state to the second state based on a received PDCCH.
    Type: Application
    Filed: June 28, 2017
    Publication date: October 19, 2017
    Inventors: Tomohiro IKAI, Takeshi TSUKUBA
  • Publication number: 20170302961
    Abstract: In generation of a wedgelet pattern, all the patterns are generated through a line segment drawing process and a region filling process. Therefore, there is a problem that a processing amount is large. A moving image decoding device (1) includes: a wedgelet pattern generation section (145T4) that generates a wedge pattern; a rotation pattern generation section (1465) that derives a rotation pattern by rotating the wedge pattern; a pattern storage section (1464) that adds the rotation pattern to a wedge pattern table; and a DC prediction value derivation section (145T3) that derives a prediction value of each region partitioned in the wedge pattern included in the wedge pattern table (145T5).
    Type: Application
    Filed: October 6, 2015
    Publication date: October 19, 2017
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Tomohiro IKAI, Takeshi TSUKUBA
  • Patent number: 9794572
    Abstract: There is provided a terminal device capable of efficiently performing communication in a communication system in which a base station device and the terminal device communicate with each other. The terminal device that communicates with the base station device by using a plurality of aggregated cells recognizes that a serving cell is stopped in a first state, recognizes that the serving cell is started in a second state, and switches from the first state to the second state based on a received PDCCH.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: October 17, 2017
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tomohiro Ikai, Takeshi Tsukuba
  • Patent number: 9794584
    Abstract: In a case that a pixel shape in a luma domain is not similar to a pixel shape in a chroma domain in an input image, a prediction image that is generated in the reuse of a luma prediction mode is made more accurate. A moving image decoding apparatus 1 includes a gradient deriving unit 1453B that references a chroma gradient definition DEFANG1C, and derives a chroma prediction direction from a prediction mode based on a luma prediction direction.
    Type: Grant
    Filed: February 7, 2017
    Date of Patent: October 17, 2017
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Yukinobu Yasugi, Tomoyuki Yamamoto, Tomohiro Ikai, Takeshi Tsukuba