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: 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
  • Publication number: 20170237989
    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: May 1, 2017
    Publication date: August 17, 2017
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Takeshi TSUKUBA, Yasuaki TOKUMO
  • Publication number: 20170208330
    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: March 24, 2017
    Publication date: July 20, 2017
    Inventors: Tomohiro IKAI, Takeshi TSUKUBA
  • Publication number: 20170195680
    Abstract: Even in a case in which a color format is a format other than 4:2:0, an image coding device and an image decoding device capable of accurately locating a reference pixel position in inter-layer image prediction are realized. A hierarchical moving image decoding device (1) includes a parameter set decoding section (12) that decodes a scaled reference layer offset syntax that is coded in a chroma pixel unit and a predicted image generation section (1442) that derives a scale based on a scaled reference layer offset which is a product of the scaled reference layer offset syntax and a luminance chroma size ratio of a target layer picture and generates a predicted image.
    Type: Application
    Filed: May 7, 2015
    Publication date: July 6, 2017
    Inventors: Tomoyuki YAMAMOTO, Tomohiro IKAI, Takeshi TSUKUBA
  • Patent number: 9699479
    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: November 2, 2016
    Date of Patent: July 4, 2017
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Tomohiro Ikai, Takeshi Tsukuba
  • Patent number: 9667984
    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: September 26, 2013
    Date of Patent: May 30, 2017
    Assignee: Dolby International AB
    Inventors: Tomoyuki Yamamoto, Tomohiro Ikai, Yukinobu Yasugi, Takeshi Tsukuba
  • Patent number: 9667976
    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: September 8, 2015
    Date of Patent: May 30, 2017
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Takeshi Tsukuba, Yasuaki Tokumo
  • Publication number: 20170150164
    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: Application
    Filed: February 7, 2017
    Publication date: May 25, 2017
    Inventors: Yukinobu YASUGI, Tomoyuki YAMAMOTO, Tomohiro IKAI, Takeshi TSUKUBA
  • Publication number: 20170142442
    Abstract: Since the size of a lookup table necessary to retain a partition pattern list is large in DMM 1 prediction, it is difficult to dispose the lookup table in a cache. For this reason, access to an external memory occurs at each time of access to the lookup table, and thus a problem may occur in that a processing speed is lowered. In the DMM 1 prediction, the lookup table for retaining a partition pattern of a first size is deleted, a partition pattern of a second size smaller than the first size is scaled to the first size, and the partition pattern of the first size is generated.
    Type: Application
    Filed: June 22, 2015
    Publication date: May 18, 2017
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Takeshi TSUKUBA, Tomohiro IKAI
  • Publication number: 20170134750
    Abstract: In DBBP, there is a problem because of a large processing amount of a synthesis process in which two complement images are synthesized according to segmentation and a filtering process is executed. A predicted image generation device includes a segmentation derivation section that derives segmentation information from an image; and an image synthesis section that generates a predicted image. The image synthesis section executes a filtering process based on a partition mode and the segmentation information.
    Type: Application
    Filed: June 19, 2015
    Publication date: May 11, 2017
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Tomohiro IKAI, Takeshi TSUKUBA
  • Publication number: 20170099488
    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: Application
    Filed: October 19, 2016
    Publication date: April 6, 2017
    Inventors: Takeshi TSUKUBA, Tomohiro IKAI, Tomoyuki YAMAMOTO
  • Patent number: 9615092
    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 10, 2016
    Date of Patent: April 4, 2017
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yukinobu Yasugi, Tomoyuki Yamamoto, Tomohiro Ikai, Takeshi Tsukuba
  • Publication number: 20170078702
    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: November 2, 2016
    Publication date: March 16, 2017
    Inventors: Tomohiro IKAI, Takeshi TSUKUBA
  • Publication number: 20170041635
    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: October 25, 2016
    Publication date: February 9, 2017
    Inventors: Tomohiro IKAI, Yukinobu YASUGI, Tomoyuki YAMAMOTO, Takeshi TSUKUBA
  • Publication number: 20170034532
    Abstract: A hierarchy video decoding device (1) includes a parameter set decoding unit (12) that decodes reference region information, and a predicted image generation portion (1442) that derives a scale or a corresponding reference position, and generates a predicted image, based on a target layer reference region position and a reference layer reference region position which are derived from the reference region information.
    Type: Application
    Filed: April 24, 2015
    Publication date: February 2, 2017
    Inventors: Tomoyuki YAMAMOTO, Tomohiro IKAI, Takeshi TSUKUBA
  • Publication number: 20170019673
    Abstract: According to an aspect of the present invention, in an output layer set, decoding processing of a non-output and non-reference layer is omitted, and thus a processing amount and a memory size required for decoding the non-output and non-reference layer can be reduced.
    Type: Application
    Filed: March 12, 2015
    Publication date: January 19, 2017
    Inventors: Takeshi TSUKUBA, Tomohiro IKAI, Tomoyuki YAMAMOTO
  • Publication number: 20170006300
    Abstract: In a conventional art, an output layer set having no output layer is sometimes defined. Consequently, even if the decoder decodes a bit stream to obtain each layer in the output layer set without the output layer, there is no picture to be outputted. There is a possibility that such coded data causes the decoder expecting an output to operate unexpectedly. Output layer sets having the same configuration may be defined. Consequently, the amount of code pertaining to the output layer sets defined in an overlapping manner is redundant. According to an aspect of the present invention, specification of a bit stream conformance pertaining to the output layer set prevents occurrence of an output layer set without an output layer and a redundant output layer set.
    Type: Application
    Filed: September 13, 2016
    Publication date: January 5, 2017
    Inventors: Takeshi TSUKUBA, Tomohiro IKAI, Tomoyuki YAMAMOTO
  • Patent number: 9538205
    Abstract: In order to simplify hardware and improve coding efficiency, an adjacent sub-block coefficient presence/absence context deriving unit 124c derives context indexes as three-stage values according to a position of a process target transform coefficient in a process target sub-block in a case where a sub-block coefficient presence/absence flag is 0 in a right adjacent sub-block or a lower adjacent sub-block.
    Type: Grant
    Filed: May 24, 2013
    Date of Patent: January 3, 2017
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tomohiro Ikai, Takeshi Tsukuba
  • Publication number: 20160381393
    Abstract: A layer incapable of being decoded on a bit stream which is generated through a bit stream extraction process from a bit stream including a prescribed layer set and which only includes a layer set made up of a subset of the prescribed layer set, occurs. An aspect of the present disclosure specifies a bit stream constraint pertaining to a parameter set, and a bit stream extraction process.
    Type: Application
    Filed: April 22, 2016
    Publication date: December 29, 2016
    Inventors: Takeshi TSUKUBA, Tomoyuki YAMAMOTO, Tomohiro IKAI
  • Patent number: 9525876
    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: Grant
    Filed: October 31, 2012
    Date of Patent: December 20, 2016
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tomohiro Ikai, Yukinobu Yasugi, Tomoyuki Yamamoto, Takeshi Tsukuba