Patents by Inventor Keiichi Chono

Keiichi Chono 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: 20210029363
    Abstract: A video encoding device for encoding video using inter prediction includes encoding control means 11 for controlling an inter-PU partition type of a CU to be encoded, based on a minimum inter-PU size (PA) and a CU size (PB) of the CU to be encoded. A video decoding device includes decoding control means for controlling an inter-PU partition of a CU to be decoded, based on the minimum inter-PU size (PA) and the size (PB) of the CU to be decoded.
    Type: Application
    Filed: October 8, 2020
    Publication date: January 28, 2021
    Applicant: NEC CORPORATION
    Inventors: Kenta SENZAKI, Yuzo SENDA, Keiichi CHONO, Hirofumi AOKI
  • Publication number: 20210021835
    Abstract: A video encoding device includes encoding control means 11 for controlling an inter-PU partition type of a CU to be encoded, based on the maximum number (PA) of motion vectors allowed for an image block having a predetermined area and the number (PB) of motion vectors of an encoded image block contained in the image block having the predetermined area. A video decoding device includes decoding control means for controlling an inter-PU partition type of a CU to be decoded, based on the maximum number (PA) of motion vectors allowed for an image block having a predetermined area and the number (PB) of motion vectors of a decoded image block contained in the image block having the predetermined area.
    Type: Application
    Filed: October 1, 2020
    Publication date: January 21, 2021
    Applicant: NEC CORPORATION
    Inventors: Kenta SENZAKI, Yuzo SENDA, Keiichi CHONO, Hirofumi AOKI
  • Publication number: 20200366903
    Abstract: In a video decoding device, a quantization step size decoding unit calculates a quantization step size that controls a granularity of the inverse quantization by, based on an image prediction, selectively using a mean value of at least a quantization step size assigned to a leftwardly adjacent neighboring image block already decoded and a quantization step size assigned to a upwardly adjacent neighboring image block already decoded or a quantization step size assigned to an image block decoded immediately before.
    Type: Application
    Filed: August 4, 2020
    Publication date: November 19, 2020
    Applicant: NEC CORPORATION
    Inventors: Hirofumi Aoki, Keiichi Chono, Yuzo Senda, Kenta Senzaki
  • Publication number: 20200366904
    Abstract: In a video decoding device, a quantization step size decoding unit calculates a quantization step size that controls a granularity of the inverse quantization by, based on an image prediction, selectively using a mean value of at least a quantization step size assigned to a leftwardly adjacent neighboring image block already decoded and a quantization step size assigned to a upwardly adjacent neighboring image block already decoded or a quantization step size assigned to an image block decoded immediately before.
    Type: Application
    Filed: August 4, 2020
    Publication date: November 19, 2020
    Applicant: NEC Corporation
    Inventors: Hirofumi Aoki, Keiichi Chono, Yuzo Senda, Kenta Senzaki
  • Publication number: 20200366905
    Abstract: In a video decoding device, a quantization step size decoding unit calculates a quantization step size that controls a granularity of the inverse quantization by, based on an image prediction, selectively using a mean value of at least a quantization step size assigned to a leftwardly adjacent neighboring image block already decoded and a quantization step size assigned to a upwardly adjacent neighboring image block already decoded or a quantization step size assigned to an image block decoded immediately before.
    Type: Application
    Filed: August 4, 2020
    Publication date: November 19, 2020
    Applicant: NEC CORPORATION
    Inventors: Hirofumi AOKI, Keiichi CHONO, Yuzo SENDA, Kenta SENZAKI
  • Patent number: 10841588
    Abstract: A video encoding device includes encoding control means 11 for controlling an inter-PU partition type of a CU to be encoded, based on the maximum number (PA) of motion vectors allowed for an image block having a predetermined area and the number (PB) of motion vectors of an encoded image block contained in the image block having the predetermined area. A video decoding device includes decoding control means for controlling an inter-PU partition type of a CU to be decoded, based on the maximum number (PA) of motion vectors allowed for an image block having a predetermined area and the number (PB) of motion vectors of a decoded image block contained in the image block having the predetermined area.
    Type: Grant
    Filed: January 5, 2012
    Date of Patent: November 17, 2020
    Assignee: NEC CORPORATION
    Inventors: Kenta Senzaki, Yuzo Senda, Keiichi Chono, Hirofumi Aoki
  • Patent number: 10841590
    Abstract: A video encoding device for encoding video using inter prediction includes encoding control means 11 for controlling an inter-PU partition type of a CU to be encoded, based on a minimum inter-PU size (PA) and a CU size (PB) of the CU to be encoded. A video decoding device includes decoding control means for controlling an inter-PU partition of a CU to be decoded, based on the minimum inter-PU size (PA) and the size (PB) of the CU to be decoded.
    Type: Grant
    Filed: January 5, 2012
    Date of Patent: November 17, 2020
    Assignee: NEC CORPORATION
    Inventors: Kenta Senzaki, Yuzo Senda, Keiichi Chono, Hirofumi Aoki
  • Patent number: 10827201
    Abstract: In a video encoding device, a transmission section sets a value corresponding to characteristics specified by ITU-R BT.709 to 1 in the transfer characteristics syntax when the dynamic range of the video signal is a SDR (Standard Dynamic Range), and sets a value corresponding to one of characteristics specified by HLG (Hybrid Log Gamma) to 18 or a value corresponding to one of characteristics specified by PQ (Perceptual Quantizer) to 16 when the dynamic range of the video signal is a HDR (High Dynamic Range).
    Type: Grant
    Filed: March 20, 2020
    Date of Patent: November 3, 2020
    Assignee: NEC CORPORATION
    Inventors: Takayuki Ishida, Keiichi Chono
  • Publication number: 20200322615
    Abstract: A video decoding device and method, including extracting PCM block size information including a threshold, from a bitstream, determining the threshold based on the extracted PCM block size information; parsing a PCM header from the bitstream with respect to an encoded block, only when said encoded block is prediction mode of intra prediction and a block size of said encoded block is equal to or greater than the determined threshold, controlling an entropy decoding process and a PCM decoding process based on the parsed PCM header; parsing transformed data of a prediction error data of an image in the bitstream; and PCM-decoding PCM data of the image in the bitstream, wherein the decoding performs the decoding operation based on the prediction mode being intra prediction and based on the block size of the encoded block being equal to or greater than the determined threshold.
    Type: Application
    Filed: June 24, 2020
    Publication date: October 8, 2020
    Applicant: NEC CORPORATION
    Inventors: Keiichi CHONO, Yuzo SENDA, Junji TAJIME, Hirofumi AOKI, Kenta SENZAKI
  • Publication number: 20200322638
    Abstract: A video decoding device includes a demultiplexer which demultiplexes a video bitstream including video data of an encoded slice, Supplemental-Enhancement-Information having first information indicating a leading picture in gradual refresh, and Supplemental-Enhancement-Information having second information indicating segments where a refresh has completed in a current picture; an extractor which extracts the second information from a message which is part of the demultiplexed Supplemental-Enhancement-Information; and a video decoder which decodes image data from the demultiplexed video bitstream by using at least inter prediction, wherein the video decoder starts decoding based on the leading picture in gradual refresh.
    Type: Application
    Filed: June 18, 2020
    Publication date: October 8, 2020
    Inventors: Hirofumi AOKI, Keiichi CHONO, Masato TSUKADA
  • Publication number: 20200296366
    Abstract: A video encoding device 10 includes: an quadtree split flag encoding unit 11 for entropy-encoding a flag indicating whether or not a block is partitioned based on a quadtree structure; a skip flag encoding unit 12 for entropy-encoding a skip flag of an end node in a quadtree structure; a binary tree information encoding unit 13 for entropy-encoding a flag indicating whether or not a block of the end node in the quadtree structure is partitioned based on a binary tree structure and a horizontal/vertical splitting direction flag indicating a splitting direction; and a size multiplexing unit 14 for multiplexing information indicating a minimum size of partitioning based on the binary tree structure, in a bitstream, wherein in the case where a node of a size equal to the minimum size is further partitioned based on the binary tree structure, the binary tree information encoding unit 13 does not entropy-encode the horizontal/vertical splitting direction flag at the node.
    Type: Application
    Filed: November 15, 2017
    Publication date: September 17, 2020
    Applicant: NEC CORPORATION
    Inventor: Keiichi CHONO
  • Publication number: 20200288141
    Abstract: A video coding device performs video coding using a block based affine transform motion compensated prediction technique that includes a process of calculating a motion vector of each subblock using motion vectors of control points in a block. The video coding device includes block based affine transform motion compensated prediction control means for controlling at least one of a block size, a prediction direction, and a motion vector precision of the subblock in the block subjected to the block based affine transform motion compensated prediction, using a coding parameter supplied from outside.
    Type: Application
    Filed: August 31, 2018
    Publication date: September 10, 2020
    Applicant: NEC Corporation
    Inventor: Keiichi CHONO
  • Patent number: 10771790
    Abstract: In a video decoding device, a quantization step size decoding unit calculates a quantization step size that controls a granularity of the inverse quantization by, based on an image prediction, selectively using a mean value of at least a quantization step size assigned to a leftwardly adjacent neighboring image block already decoded and a quantization step size assigned to a upwardly adjacent neighboring image block already decoded or a quantization step size assigned to an image block decoded immediately before.
    Type: Grant
    Filed: April 1, 2019
    Date of Patent: September 8, 2020
    Assignee: NEC CORPORATION
    Inventors: Hirofumi Aoki, Keiichi Chono, Yuzo Senda, Kenta Senzaki
  • Patent number: 10742991
    Abstract: A video encoding device includes: transform means 11 for transforming an image block; entropy encoding means 12 for entropy-encoding transformed data of the image block transformed by the transform means 11; PCM encoding means 13 for PCM-encoding the image block; multiplex data selection means 14 for selecting output data of the entropy encoding means 12 or the PCM encoding means 13, in a block of a block size set from the outside; and multiplexing means 15 for embedding a PCM header in a bitstream, in the block of the set from the outside block size.
    Type: Grant
    Filed: May 4, 2016
    Date of Patent: August 11, 2020
    Assignee: NEC CORPORATION
    Inventors: Keiichi Chono, Yuzo Senda, Junji Tajime, Hirofumi Aoki, Kenta Senzaki
  • Patent number: 10728579
    Abstract: A video decoding device includes a demultiplexer which demultiplexes Supplemental-Enhancement-Information having information indicating segments where a refresh has completed in a current picture, the segments including an intra-encoded-segment in the current picture, and a video bitstream including video data of an encoded slice; an extractor which extracts the information from a message which is part of the demultiplexed Supplemental-Enhancement-Information; and a video decoder which decodes image data from the demultiplexed video bitstream.
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: July 28, 2020
    Assignee: NEC Corporation
    Inventors: Hirofumi Aoki, Keiichi Chono, Masato Tsukada
  • Publication number: 20200236385
    Abstract: A video coding device performs video coding using a block based affine transform motion compensated prediction technique that includes a process of calculating a motion vector of each subblock using motion vectors of control points in a block. The video coding device includes block based affine transform motion compensated prediction control means for controlling at least one of a block size, a prediction direction, and a motion vector precision of the subblock in the block subjected to the block based affine transform motion compensated prediction, using at least one of an image size, a prediction direction of the block, and a difference between the motion vectors of the control points in the block.
    Type: Application
    Filed: August 31, 2018
    Publication date: July 23, 2020
    Applicant: NEC Corporation
    Inventor: Keiichi CHONO
  • Publication number: 20200221132
    Abstract: In a video encoding device, a transmission section sets a value corresponding to characteristics specified by ITU-R BT.709 to 1 in the transfer characteristics syntax when the dynamic range of the video signal is a SDR (Standard Dynamic Range), and sets a value corresponding to one of characteristics specified by HLG (Hybrid Log Gamma) to 18 or a value corresponding to one of characteristics specified by PQ (Perceptual Quantizer) to 16 when the dynamic range of the video signal is a HDR (High Dynamic Range).
    Type: Application
    Filed: March 20, 2020
    Publication date: July 9, 2020
    Applicant: NEC CORPORATION
    Inventors: Takayuki ISHIDA, Keiichi CHONO
  • Patent number: 10645421
    Abstract: A video encoding device is a video encoding device for appropriately selecting a scalable encoding structure from a plurality of scalable encoding structures to generate a bitstream, using dynamic range-related video signal information, and includes an encoding section for selecting the scalable encoding structure capable of transmitting the dynamic range-related video signal information for switching a dynamic range, when a video signal to be encoded is switched from an SDR (a standard dynamic range) signal to an HDR (a high dynamic range) signal or switched from the HDR signal to the SDR signal in a temporal direction.
    Type: Grant
    Filed: November 14, 2016
    Date of Patent: May 5, 2020
    Assignee: NEC CORPORATION
    Inventors: Takayuki Ishida, Keiichi Chono
  • Publication number: 20200068225
    Abstract: A video encoding device 10 includes: an entropy encoding unit 11 for entropy-encoding data relating to a quadtree structure and data relating to a binary tree structure; and an encoding prohibition unit 12 for, in the case where a block obtained by partitioning based on the quadtree structure is not partitioned based on the binary tree structure, prohibiting entropy-encoding the data relating to the binary tree structure of the block.
    Type: Application
    Filed: November 15, 2017
    Publication date: February 27, 2020
    Applicant: NEC Corporation
    Inventor: Keiichi CHONO
  • Patent number: 10542293
    Abstract: A video encoding device 10 includes: an entropy encoding unit 11 for entropy-encoding at least a quadtree split flag, a skip flag, a binary tree split flag, and a binary tree split direction flag; and an entropy encoding control unit 12 for controlling the entropy encoding unit 11, wherein the entropy encoding control unit 12, in the case where the skip flag of a block of an end node in a quadtree structure indicates that the binary tree split flag succeeds, causes the entropy encoding unit 11 to entropy-encode the binary tree split flag and the binary tree split direction flag, and in the case where the skip flag of the block oft the end node in the quadtree structure indicates that the binary tree split flag does not succeed, causes the entropy encoding unit 11 not to entropy-encode the binary tree split flag and the binary tree split direction flag.
    Type: Grant
    Filed: November 15, 2017
    Date of Patent: January 21, 2020
    Assignee: NEC CORPORATION
    Inventor: Keiichi Chono