公开(公告)号：US20160119630A1

公开(公告)日：2016-04-28

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 ,  H04N19/91 ,  H04N19/96 ,  H04N19/124 ,  H04N19/14

CPC classification number: H04N19/18 ,  H04N19/124 ,  H04N19/14 ,  H04N19/146 ,  H04N19/147 ,  H04N19/647 ,  H04N19/70 ,  H04N19/91 ,  H04N19/96

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.

Abstract translation: 用于量化正交变换系数以计算系数级的量化单元：计算要在图像块中处理的正交变换系数的有效系数级的值信息位的数量; 监视从发送顺序中的目标之前的开始到第N次的图像块中的量化单元输出的系数水平，并且更新指示监视的系数水平中的至少一个是否是有效的状态变量; 基于要处理的正交变换系数的位置和状态变量来计算要处理的正交变换系数的有效系数级的位置信息位的数量; 并且在值信息位的数量和位置信息位的数量满足预定条件的情况下，将有效系数电平设置为0。

公开(公告)号：US20240129482A1

公开(公告)日：2024-04-18

申请号：US18483984

申请日：2023-10-10

Applicant: NEC Corporation

Inventor： Kenta IIDA ,  Kenta TOKUMITSU ,  Tatsuji MORIYOSHI ,  Keiichi CHONO

IPC: H04N19/139 ,  H04N19/132 ,  H04N19/176

CPC classification number: H04N19/139 ,  H04N19/132 ,  H04N19/176

Abstract: The video coding device is a video coding device capable of executing a predictive coding process including a specific process in which a coded frame of a different resolution from a resolution of a frame to be processed is used as a reference frame, and includes a coding unit which executes the predictive coding process, and a controller which prohibits, in the predictive coding process, execution of a first process which uses information, which is determined based on a spatial position of the block to be coded, on blocks in frames at different times, a second process which performs correction using information computed when decoding is performed, or both the first process and the second process.

公开(公告)号：US20150319440A1

公开(公告)日：2015-11-05

申请号：US14651466

申请日：2013-12-03

Applicant: NEC CORPORATION

Inventor： Kenta TOKUMITSU ,  Keiichi CHONO

IPC: H04N19/126 ,  H04N19/18 ,  H04N19/91 ,  H04N19/149 ,  H04N19/13 ,  H04N19/65

CPC classification number: H04N19/126 ,  H04N19/124 ,  H04N19/13 ,  H04N19/132 ,  H04N19/147 ,  H04N19/149 ,  H04N19/15 ,  H04N19/18 ,  H04N19/65 ,  H04N19/91

Abstract: A video coding device includes: an orthogonal transform unit 11 which orthogonally transforms an image block to calculate an orthogonal transform coefficient; a quantization unit 12 which quantizes the orthogonal transform coefficient to calculate a coefficient level; and an entropy coding unit 13 which entropy-encodes location information on all significant coefficient levels among the coefficient levels, and then entropy-encodes value information on each of the significant coefficient levels to output a bitstream, wherein the quantization unit 11 includes a number of location information bits calculating unit which calculates the number of bits of location information determined based on the location of a coefficient level to be significant first in order of transmission and included in the image block; a number of value information bits calculating unit which calculates the number of value information bits of a coefficient level to be significant, and a high-cost coefficient level detection/removal unit which sets a coefficient level to be significant in which the number of location information bits and the number of value information bits meet a predetermined condition to 0.

Abstract translation: 视频编码装置包括：正交变换单元11，其对图像块进行正交变换，以计算正交变换系数; 量化单元12，其量化正交变换系数以计算系数水平; 以及熵编码单元13，其对系数级别中的所有有效系数级别的位置信息进行熵编码，然后对每个有效系数级别的值信息进行熵编码，以输出比特流，其中量化单元11包括 位置信息比特计算单元，其计算基于首先按照发送顺序显着地显示的系数级别的位置确定的位置信息的比特数，并包括在图像块中; 多个值信息比特计算单元，其计算要显着的系数级别的值信息比特数;以及高成本系数级检测/去除单元，其将系数级别设置为有效，其中位置信息的数量 位和值信息位的数量满足预定条件为0。

公开(公告)号：US20170201773A1

公开(公告)日：2017-07-13

申请号：US15314551

申请日：2015-06-05

Applicant: NEC Corporation

Inventor： Kenta TOKUMITSU ,  Keiichi CHONO

IPC: H04N19/96 ,  H04N19/119 ,  H04N19/33 ,  H04N19/513

CPC classification number: H04N19/96 ,  H04N19/115 ,  H04N19/119 ,  H04N19/162 ,  H04N19/167 ,  H04N19/30 ,  H04N19/33 ,  H04N19/513 ,  H04N19/52

Abstract: A video coding apparatus for outputting a scalable bit stream obtained by multiplexing a base layer bit stream and an enhancement layer bit stream, includes: a rectangular area generation unit configured to generate a rectangular area that is of a multiple of a CTU (Coding Tree Unit) size and includes a particular rectangular area; a determination unit configured to determine whether a CTU of a coding target is included in the rectangular area of the multiple of the CTU size; and a prediction unit configured to, when the CTU of the coding target is not included in the rectangular area of the multiple of the CTU size, divide the CTU of the coding target by a minimum number of CU blocks, and predict each of obtained CUs with a prediction signal of a zero motion vector from the base layer.

公开(公告)号：US20240163452A1

公开(公告)日：2024-05-16

申请号：US18284373

申请日：2021-12-10

Applicant: NEC Corporation

Inventor： Kenta TOKUMITSU ,  Keiichi Chono

IPC: H04N19/159 ,  H04N19/172 ,  H04N19/31

CPC classification number: H04N19/159 ,  H04N19/172 ,  H04N19/31

Abstract: The video encoding device includes a predictor which performs a prediction process using intra-prediction or inter-prediction, and a coding controller which controls the predictor so that under a predetermined condition that pictures in the later display order are not coded before pictures in the earlier display order and that pictures in lower layers do not refer to pictures in upper layers, the predictor uses a picture closest in the display order to a picture to be coded as a reference picture when coding the picture referring to a picture in the lower layer.

公开(公告)号：US20180027256A1

公开(公告)日：2018-01-25

申请号：US15541068

申请日：2015-12-16

Applicant: NEC CORPORATION

Inventor： Seiya SHIBATA ,  Takayuki ISHIDA ,  Keiichi CHONO ,  Noriaki SUZUKI ,  Eita KOBAYASHI ,  Kenta TOKUMITSU

IPC: H04N19/52 ,  H04N19/176 ,  H04N19/96 ,  H04N19/142 ,  H04N19/14 ,  H04N19/159 ,  H04N19/124

CPC classification number: H04N19/52 ,  H04N19/119 ,  H04N19/124 ,  H04N19/14 ,  H04N19/142 ,  H04N19/149 ,  H04N19/15 ,  H04N19/159 ,  H04N19/176 ,  H04N19/177 ,  H04N19/96

Abstract: A video encoding device includes: an encoding parameter search unit for receiving input video and outputting an encoding parameter; an encoder for receiving the input video and the encoding parameter and performing encoding; a code amount control unit for deciding a block size enlargement parameter indicating at least a degree of enlargement, based on a target code amount and encoding status information; and a block size enlargement unit for enlarging a block size of the input video based on the block size enlargement parameter.