公开(公告)号：US10542293B2

公开(公告)日：2020-01-21

申请号：US16080709

申请日：2017-11-15

Applicant: NEC CORPORATION

Inventor： Keiichi Chono

IPC: H04N19/96 ,  H04N19/91 ,  H04N19/119 ,  H04N19/176 ,  H04N19/70

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.

公开(公告)号：US10511862B2

公开(公告)日：2019-12-17

申请号：US14409220

申请日：2013-05-31

Applicant: NEC Corporation

Inventor： Hirofumi Aoki ,  Keiichi Chono ,  Masato Tsukada

IPC: H04N19/50 ,  H04N19/70 ,  H04N19/68 ,  H04N19/44 ,  H04N19/105 ,  H04N19/159 ,  H04N19/196 ,  H04N19/107 ,  H04N19/174 ,  H04N19/167

Abstract: A video encoder 101 encodes image data of an input moving image based on prediction and generates a video bitstream of encoded pictures. A refresh controller 102 refreshes such that a partial area in the picture is assumed as a unit area to be refreshed and the unit area to be refreshed is moved on a picture-by-picture basis. A display-enabled area encoder 103 encodes a display-enabled area for each picture and generating a display-enabled area information bitstream in refreshing. A multiplexer 104 multiplexes the video bitstream and the display-enabled area information bitstream.

公开(公告)号：US10085025B2

公开(公告)日：2018-09-25

申请号：US15655500

申请日：2017-07-20

Applicant: NEC Corporation

Inventor： Keiichi Chono ,  Hirofumi Aoki

IPC: H04N19/126 ,  H04N19/13 ,  H04N19/463 ,  H04N19/91 ,  H04N19/154 ,  H04N19/169 ,  H04N19/44

Abstract: Disclosed are image quantization parameter decoding method and systems for decoding a quantization parameter for a video decoding process that is based on context-based adaptive binary arithmetic coding. In one embodiment, an image quantization parameter decoding method includes binary-arithmetic-decoding a first bin indicating whether or not a delta quantization parameter is significant, other bins, which are subsequent to the first bin, indicating an absolute value of the delta quantization parameter, and a sign bin, which is subsequent to the other bins, indicating whether the delta quantization parameter is positive or negative. The method further includes generating a delta quantization parameter by de-binarizing the first bin, the other bins and the sign bin. The method further includes generating a re-constructed quantization parameter by adding a predicted quantization parameter to the delta quantization parameter. The binary-arithmetic-decoding is performed using contexts for the first bin and the other bins, and using no context for the sign bin.

公开(公告)号：US10045033B2

公开(公告)日：2018-08-07

申请号：US14888976

申请日：2014-04-22

Applicant: NEC Corporation

Inventor： Kenta Tokumitsu ,  Keiichi Chono ,  Eita Kobayashi

IPC: H04N19/18 ,  H04N19/70 ,  H04N19/96 ,  H04N19/124 ,  H04N19/91 ,  H04N19/14 ,  H04N19/146 ,  H04N19/147 ,  H04N19/64

Abstract: A quantization unit for quantizing orthogonal transform coefficients to calculate a coefficient level: calculates the number of value information bits of a significant coefficient level of an orthogonal transform coefficient to be processed in an image block; monitors coefficient levels output from the quantization unit in the image block from beginning to the N-th prior to the target in transmission order, and updates a state variable indicating whether or not at least one of monitored coefficient levels is significant; calculates the number of position information bits of the significant coefficient level of the orthogonal transform coefficient to be processed, based on a position of the orthogonal transform coefficient to be processed and the state variable; and sets the significant coefficient level to 0 in the case where the number of value information bits and the number of position information bits satisfy a predetermined condition.

公开(公告)号：US09998752B2

公开(公告)日：2018-06-12

申请号：US14436303

申请日：2013-10-24

Applicant: NEC Corporation

Inventor： Keiichi Chono

IPC: H04N7/12 ,  H04N19/52 ,  H04N19/105 ,  H04N19/176 ,  H04N19/172 ,  H04N19/30 ,  H04N19/139 ,  H04N19/147

CPC classification number: H04N19/52 ,  H04N19/105 ,  H04N19/139 ,  H04N19/147 ,  H04N19/172 ,  H04N19/176 ,  H04N19/30

Abstract: A video encoding device: searches for motion information of a block to be encoded; generates a merge motion information candidate list based on motion information of encoded blocks adjacent to the block to be encoded; eliminates an improper merge index or indexes from the merge motion information candidate list, using the motion information determined as a result of the search for the motion information; and determines a merge mode, using a merge index of merge motion information in the merge motion information candidate list from which the improper merge index has been eliminated.

公开(公告)号：US20150281726A1

公开(公告)日：2015-10-01

申请号：US14436303

申请日：2013-10-24

Applicant: NEC CORPORATION

Inventor： Keiichi Chono

IPC: H04N19/52 ,  H04N19/30 ,  H04N19/172 ,  H04N19/105 ,  H04N19/176

CPC classification number: H04N19/52 ,  H04N19/105 ,  H04N19/139 ,  H04N19/147 ,  H04N19/172 ,  H04N19/176 ,  H04N19/30

Abstract: A video encoding device: searches for motion information of a block to be encoded; generates a merge motion information candidate list based on motion information of encoded blocks adjacent to the block to be encoded; eliminates an improper merge index or indexes from the merge motion information candidate list, using the motion information determined as a result of the search for the motion information; and determines a merge mode, using a merge index of merge motion information in the merge motion information candidate list from which the improper merge index has been eliminated.

Abstract translation: 视频编码装置：搜索要编码的块的运动信息; 基于与要编码的块相邻的编码块的运动信息生成合并运动信息候选列表; 使用作为搜索运动信息的结果确定的运动信息，从合并运动信息候选列表中消除不合适的合并索引或索引; 并且使用合并运动信息的合并运动信息的合并索引来确定合并模式，合并运动信息候选列表中的合并运动信息候选列表中不合适的合并索引已被

公开(公告)号：US12283077B2

公开(公告)日：2025-04-22

申请号：US17801441

申请日：2020-02-27

Applicant: NEC Corporation

Inventor： Keiichi Chono ,  Ryuichi Akashi ,  Yuka Ogino

IPC: G06V10/141 ,  G06V40/18 ,  G06V40/19

Abstract: An imaging system (10) includes: iris imaging means (1) for photographing an iris of a subject; first irradiation means (2a) for applying light to the subject; and second irradiation means (2b) for applying light to the subject in such a manner that an angle between an optical axis of the light emitted from the second irradiation means (2b) and an optical axis of the iris imaging means (1) is larger than an angle between an optical axis of the light emitted from the first irradiation means (2a) and the optical axis of the iris imaging means (1).

公开(公告)号：US12278954B2

公开(公告)日：2025-04-15

申请号：US18273150

申请日：2021-12-06

Applicant: NEC Corporation

Inventor： Kenta Iida ,  Keiichi Chono

IPC: H04N19/11 ,  H04N19/124 ,  H04N19/18 ,  H04N19/593 ,  H04N19/597

Abstract: The video coding device calculates a first value representing energy of the prediction error signals of the block to be processed, eliminates specified transform coefficients when at least one of a width and a height of the block to be processed exceeds a predetermined value and calculates a second value representing energy of the transform coefficients other than the eliminated transform coefficients, and decides not to make the candidate of prediction mode the optimal prediction mode, without executing quantizing, arithmetic-coding and local decoding, in a case where the second value is smaller than a predetermined degree as compared to the first value.

公开(公告)号：US12271454B2

公开(公告)日：2025-04-08

申请号：US17620551

申请日：2019-06-26

Applicant: NEC Corporation

Inventor： Yuka Ogino ,  Keiichi Chono

IPC: G06K9/00 ,  G06F21/32 ,  G06V40/16 ,  G06V40/18

Abstract: An authentication system (1) is provided with: a first imaging apparatus (3) that obtains a first image (300) used for an authentication by capturing an image of a first imaging range; a second imaging apparatus (3) that obtains a second image (200) by capturing an image of a second imaging range that is wider than the first imaging range; and a control apparatus (6) that selects a target person (Ta) for the authentication on the basis of a target area (TA) in the second image that includes a predetermined portion (TP) of a person (T) and a reference area (RA) in the second image that corresponds to the first imaging range.

公开(公告)号：US12219151B2

公开(公告)日：2025-02-04

申请号：US18420902

申请日：2024-01-24

Applicant: NEC Corporation

Inventor： Kenta Senzaki ,  Yuzo Senda ,  Keiichi Chono ,  Hirofumi Aoki

IPC: H04N19/103 ,  H04N19/109 ,  H04N19/119 ,  H04N19/147 ,  H04N19/157 ,  H04N19/176 ,  H04N19/44 ,  H04N19/46 ,  H04N19/503 ,  H04N19/61 ,  H04N19/70 ,  H04N19/65 ,  H04N19/91

Abstract: The video encoding device for encoding video using inter prediction includes a unit which determines to perform an entropy-encoding process of encoding a PU (Prediction Unit) partition type syntax of a CU (Coding Unit) to be encoded, based on a prediction mode of the CU to be encoded being an inter prediction mode and a size of the CU to be encoded being equal to a predetermined minimum inter-PU size.