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).

  • Publication number: 20210099721
    Abstract: There is provided an image processing apparatus and an image processing method by which a reduction in encoding efficiency can be suppressed. A prediction residual of an image is orthogonally transformed, the number of significant figures of coefficient data obtained by performance of orthogonal transform on the prediction residual is controlled on the basis of a bit depth indicating a range of pixel values of a local level that is a data unit smaller than a sequence level of the image; the coefficient data is quantized, and the number of significant figures of a quantized coefficient obtained by quantization of the coefficient data is controlled on the basis of the bit depth of the local level; and the quantized coefficient is encoded, and a bit stream is generated. The present disclosure is applicable to, for example, an image processing apparatus, an image encoding apparatus, or an image decoding apparatus.
    Type: Application
    Filed: January 31, 2019
    Publication date: April 1, 2021
    Applicant: SONY CORPORATION
    Inventor: Takeshi TSUKUBA
  • Publication number: 20210092413
    Abstract: The present disclosure relates to an image processing device and method that allow reduction in coding efficiency to be suppressed. A pixel value of a chroma component is predicted by linear prediction from a pixel value of a reference image of a luma component whose pixel location is changed by using a filter, and a prediction image of the chroma component is generated. A chroma component of encoded data in which an image is encoded is decoded by using the generated prediction image. The filter is selected on a basis of information regarding a pixel location of the chroma component and information regarding a color format. The present disclosure is applicable, for example, to an image processing device, an image encoding device, an image decoding device, or the like.
    Type: Application
    Filed: August 31, 2018
    Publication date: March 25, 2021
    Applicant: Sony Corporation
    Inventor: Takeshi TSUKUBA
  • Publication number: 20210084334
    Abstract: There is provided an image processing apparatus and an image processing method capable of suppressing a reduction in encoding efficiency. The number of significant figures of a prediction residual of an image is expanded on the basis of a bit depth indicating a range of pixel values of a local level that is a data unit smaller than a sequence level of the image; the number of significant figures of a quantized coefficient obtained by performance of orthogonal transform and quantization on the prediction residual the number of significant figures of which is expanded is normalized on the basis of the bit depth of the local level; and the quantized coefficient the number of significant figures of which is normalized is encoded and a bit stream is generated. The present disclosure is applicable to, for example, an image processing apparatus, an image encoding apparatus, or an image decoding apparatus.
    Type: Application
    Filed: January 31, 2019
    Publication date: March 18, 2021
    Applicant: SONY CORPORATION
    Inventor: Takeshi TSUKUBA
  • Publication number: 20210084335
    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: November 30, 2020
    Publication date: March 18, 2021
    Inventors: Tomohiro IKAI, Yukinobu YASUGI, Tomoyuki YAMAMOTO, Takeshi TSUKUBA
  • Publication number: 20210044802
    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: October 22, 2020
    Publication date: February 11, 2021
    Inventors: Tomohiro IKAI, Takeshi TSUKUBA
  • Publication number: 20210021870
    Abstract: There is provided an image processing apparatus and a method capable of achieving reduction of a drop of coding efficiency (improvement of coding efficiency). Coded data is decoded to generate coefficient data. An inverse orthogonal transform is performed for the generated coefficient data according to an inverse orthogonal transform type controlled on the basis of a coding parameter. For example, the present disclosure is applicable to an image processing apparatus, an image coding apparatus, an image decoding apparatus, or the like.
    Type: Application
    Filed: March 18, 2019
    Publication date: January 21, 2021
    Applicant: SONY CORPORATION
    Inventor: Takeshi TSUKUBA
  • Patent number: 10897632
    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: December 6, 2019
    Date of Patent: January 19, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Tomohiro Ikai, Yukinobu Yasugi, Tomoyuki Yamamoto, Takeshi Tsukuba
  • Publication number: 20210014533
    Abstract: There is provided an image processing apparatus and a method that can suppress an increase in the memory capacity necessary for an orthogonal transform and an inverse orthogonal transform. A submatrix as part of a transform matrix in a first size is used to derive a transform matrix in a second size that is a size smaller than the first size. The derived transform matrix is used to apply an inverse orthogonal transform to coefficient data in which a predicted residual of an image is orthogonally transformed. In this way, an image is generated. The present disclosure can be applied to, for example, an image processing apparatus, an image decoding apparatus, an image encoding apparatus, or the like.
    Type: Application
    Filed: March 18, 2019
    Publication date: January 14, 2021
    Applicant: SONY CORPORATION
    Inventor: Takeshi TSUKUBA
  • Publication number: 20210006796
    Abstract: [Problem] An improved system for efficiently generating or signaling quantized matrices is provided. [Solution] An image processing device is provided. The image processing device includes a decoding unit that decodes scaling list data to generate a first quantizing matrix of a first size, a generating unit that generates a second quantizing matrix for a transform block of a second size to which zeroing of a high-frequency component is applied, by referring to only a partial matrix of the first quantizing matrix generated by the decoding unit, and an inverse quantizing unit that inversely quantizes a quantized transform coefficient of the transform block of the second size, using the second quantizing matrix generated by the generating unit.
    Type: Application
    Filed: March 7, 2019
    Publication date: January 7, 2021
    Applicant: Sony Corporation
    Inventor: Takeshi TSUKUBA
  • Publication number: 20200413091
    Abstract: Memory required during decoding is reduced. A video image decoding device (1) is equipped with main direction deriving means (1453A) that references a prediction mode definition DEFPM(1), and from a prediction mode number, derives a main direction of a prediction direction corresponding to a prediction mode, and a gradient deriver (1453B) that references a gradient definition table DEFANG(1), and derives a gradient of the prediction direction.
    Type: Application
    Filed: September 14, 2020
    Publication date: December 31, 2020
    Inventors: Tomoyuki YAMAMOTO, Tomohiro IKAI, Yukinobu YASUGI, Takeshi TSUKUBA
  • Patent number: 10869061
    Abstract: There is provided an image processing apparatus and method that make it possible to suppress degradation of the encoding efficiency. In the case where primary transform that is a transform process for a prediction residual that is a difference between an image and a prediction image of the image is to be skipped, also secondary transform, which is a transform process for a primary transform coefficient obtained by the primary transform of the prediction residual, is skipped. The present disclosure can be applied, for example, to an image processing apparatus, an image encoding apparatus, an image decoding apparatus and so forth.
    Type: Grant
    Filed: December 5, 2019
    Date of Patent: December 15, 2020
    Assignee: SONY CORPORATION
    Inventor: Takeshi Tsukuba
  • Patent number: 10848764
    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: October 8, 2019
    Date of Patent: November 24, 2020
    Assignee: Velos Media, LLC
    Inventors: Tomohiro Ikai, Takeshi Tsukuba
  • Publication number: 20200366916
    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: June 25, 2020
    Publication date: November 19, 2020
    Inventors: Tomoyuki Yamamoto, Tomohiro Ikai, Yukinobu Yasugi, Takeshi Tsukuba
  • Patent number: 10841600
    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: Grant
    Filed: October 30, 2018
    Date of Patent: November 17, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Tomoyuki Yamamoto, Tomohiro Ikai, Takeshi Tsukuba
  • Publication number: 20200322633
    Abstract: The present disclosure relates to image processing apparatus and method that can suppress an increase in a load of encoding and decoding. One or both a predetermined upper limit and a predetermined lower limit are used to clip transformation coefficients obtained by applying a transformation process to a predicted residual that is a difference between an image and a predicted image of the image. In addition, one or both a predetermined upper limit and a predetermined lower limit are used to clip transformation coefficients that are subjected to an inverse transformation process to obtain a predicted residual that is a difference between an image and a predicted image of the image. The present disclosure can be applied to, for example, an image processing apparatus, an image encoding apparatus, an image decoding apparatus, and the like.
    Type: Application
    Filed: April 28, 2017
    Publication date: October 8, 2020
    Applicant: Sony Corporation
    Inventor: Takeshi TSUKUBA
  • Publication number: 20200322634
    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, 2020
    Publication date: October 8, 2020
    Inventors: Takeshi TSUKUBA, Tomoyuki YAMAMOTO, Tomohiro IKAI
  • Publication number: 20200304790
    Abstract: There is provided an image processing apparatus and method that make it possible to suppress reduction of the encoding efficiency. Encoded data is decoded, and based on a value of a transform skip identifier obtained by the decoding, execution of an inverse primary vertical transform and execution of an inverse primary horizontal transform are controlled. Further, based on a value of a transform skip identifier, execution of a primary horizontal transform and execution of a primary vertical transform are controlled, and the transform skip identifier is encoded. The present disclosure can be applied, for example, to an image processing apparatus, an image encoding apparatus, an image decoding apparatus or the like.
    Type: Application
    Filed: June 9, 2020
    Publication date: September 24, 2020
    Applicant: SONY CORPORATION
    Inventor: Takeshi TSUKUBA
  • Publication number: 20200280740
    Abstract: The present disclosure relates to an image processing apparatus and an image processing method for enabling suppression of an increase in a memory capacity required for orthogonal transform and inverse orthogonal transform. A transformation matrix is derived using a submatrix configuring a part of the transformation matrix, a prediction residual of an image is orthogonally transformed using the derived transformation matrix, and coefficient data obtained by orthogonally transforming the prediction residual is encoded to generate a bit stream. The present disclosure can be applied to, for example, an image processing apparatus, an image encoding device, an image decoding device, or the like.
    Type: Application
    Filed: November 12, 2018
    Publication date: September 3, 2020
    Applicant: Sony Corporation
    Inventor: Takeshi TSUKUBA
  • Patent number: 10728552
    Abstract: There is provided an image processing apparatus and method that make it possible to suppress reduction of the encoding efficiency. Encoded data is decoded, and based on a value of a transform skip identifier obtained by the decoding, execution of an inverse primary vertical transform and execution of an inverse primary horizontal transform are controlled. Further, based on a value of a transform skip identifier, execution of a primary horizontal transform and execution of a primary vertical transform are controlled, and the transform skip identifier is encoded. The present disclosure can be applied, for example, to an image processing apparatus, an image encoding apparatus, an image decoding apparatus or the like.
    Type: Grant
    Filed: September 15, 2017
    Date of Patent: July 28, 2020
    Assignee: SONY CORPORATION
    Inventor: Takeshi Tsukuba
  • Patent number: 10708609
    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: December 17, 2018
    Date of Patent: July 7, 2020
    Assignee: Dolby International AB
    Inventors: Tomoyuki Yamamoto, Tomohiro Ikai, Yukinobu Yasugi, Takeshi Tsukuba