公开(公告)号：US20220124350A1

公开(公告)日：2022-04-21

申请号：US17422425

申请日：2020-01-06

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Yuya OMORI ,  Takayuki ONISHI ,  Hiroe IWASAKI ,  Atsushi SHIMIZU

IPC: H04N19/167 ,  H04N19/105 ,  H04N19/137 ,  H04N19/176

Abstract: A reference region determination device is for determining a reference region to be stored in a reference image buffer, and includes: a motion vector acquisition portion configured to acquire a motion vector for each one of already encoded blocks; a position change amount derivation portion configured to derive a position change amount for the reference region based on the acquired motion vectors; and a reference region determination portion configured to determine a position of the reference region to be used in encoding of a next block for encoding after the already encoded blocks based on the position change amount.

公开(公告)号：US20210258591A1

公开(公告)日：2021-08-19

申请号：US16973741

申请日：2019-06-04

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Yuya OMORI ,  Takayuki ONISHI ,  Hiroe IWASAKI ,  Atsushi SHIMIZU

IPC: H04N19/423 ,  G11B20/00 ,  G11B20/10 ,  H04N19/433

Abstract: A buffer device stores, in relation to a first area and a second area, which are partial areas respectively located on an identical line of an encoding target frame, and a third area, which is a partial area on the line below the identical line, reference image data for each search range of a reference frame that is referred to during motion search processing executed in order of the first area, the second area, and the third area, the buffer device including a memory for storing the reference image data, and a buffer control unit which, when the motion search processing is executed on the second area, executes control so that among the reference image data included in a first search range that is referred to during the motion search processing of the first area, the reference image data included in a third search range that is referred to during the motion search processing of the third area are left in the memory without being deleted.

公开(公告)号：US20230053579A1

公开(公告)日：2023-02-23

申请号：US17796528

申请日：2020-02-25

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Yuya OMORI ,  Ken NAKAMURA ,  Daisuke KOBAYASHI ,  Hiroe IWASAKI

IPC: H04N19/137 ,  H04N19/96 ,  H04N19/176

Abstract: A coding method is a coding method executed by a coding apparatus. The coding method includes partitioning a first block having a predetermined size in an original image into a group of second blocks each being a block serving as a unit for coding, by quad tree, ternary tree, or binary tree, and predicting movement for each of the second blocks. The partitioning includes first sub-partitioning and second sub-partitioning, the first sub-partitioning includes partitioning the first block into blocks each having a size selected from sizes determined according to the quad tree, the ternary tree, or the binary tree, and the second sub-partitioning includes further partitioning the blocks each having the selected size to generate the second blocks.

公开(公告)号：US20230022215A1

公开(公告)日：2023-01-26

申请号：US17783056

申请日：2019-12-09

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Yuya OMORI ,  Ken NAKAMURA ,  Daisuke KOBAYASHI ,  Hiroe IWASAKI

IPC: H04N19/119 ,  H04N19/176 ,  H04N19/182 ,  H04N19/14

Abstract: A coding method encodes an image by dividing the image into blocks, and comprises: dividing a coding target image into a plurality of coding unit blocks; determining whether or not to encode by dividing the coding unit block into a plurality of sub-coding unit blocks, on a basis of an edge direction and an edge strength of an edge obtained for each pixel in the coding unit block; and encoding, in a case of determining to divide the coding unit block into a plurality of sub-coding unit blocks in the determining step, a first sub-coding unit block by referencing a second sub-coding unit block inside the same coding unit block as the first sub-coding unit block.

公开(公告)号：US20220078437A1

公开(公告)日：2022-03-10

申请号：US17414889

申请日：2019-12-05

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Yuya OMORI ,  Takayuki ONISHI ,  Hiroe IWASAKI ,  Atsushi SHIMIZU

IPC: H04N19/137 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176

Abstract: A coding device executes coding having divided an image into blocks, and includes: a candidate obtainment unit that obtains a plurality of provisional motion vector candidates in a coding target block; an evaluation information obtainment unit that obtains a correspondence vector that is a vector having a same direction and a same magnitude as a direction and a magnitude of the obtained provisional motion vector candidates, and evaluation information of a search center indicated by the correspondence vector in a coded block; and a selection unit that, on the basis of the evaluation information, selects, from the plurality of provisional motion vector candidates, a number of motion vector candidates that is lower than the number of the plurality of provisional motion vector candidates.