公开(公告)号：US11706457B2

公开(公告)日：2023-07-18

申请号：US17554944

申请日：2021-12-17

Applicant: NEC Corporation

Inventor： Hirofumi Aoki ,  Keiichi Chono ,  Masato Tsukada

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

CPC classification number: H04N19/68 ,  H04N19/105 ,  H04N19/107 ,  H04N19/159 ,  H04N19/167 ,  H04N19/174 ,  H04N19/196 ,  H04N19/44 ,  H04N19/50 ,  H04N19/70

Abstract: A video decoding device includes a demultiplexing unit which demultiplexes a video bitstream including video data of an encoded slice, Supplemental-Enhancement-Information having first information indicating a refresh group of segments in gradual refresh, and Supplemental-Enhancement-Information having second information indicating segments where a refresh has completed in a current picture, an extracting unit which extracts the second information from a message which is part of the demultiplexed Supplemental-Enhancement-Information, and a video decoding unit which decodes image data from the demultiplexed video bitstream by using at least inter picture prediction.

公开(公告)号：US11659189B2

公开(公告)日：2023-05-23

申请号：US17686727

申请日：2022-03-04

Applicant: NEC Corporation

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

IPC: H04N19/156 ,  H04N19/503 ,  H04N19/176 ,  H04N19/46 ,  H04N19/61 ,  H04N19/593 ,  H04N19/12 ,  H04N19/172 ,  H04N19/184

CPC classification number: H04N19/156 ,  H04N19/12 ,  H04N19/172 ,  H04N19/176 ,  H04N19/184 ,  H04N19/46 ,  H04N19/503 ,  H04N19/593 ,  H04N19/61

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.

公开(公告)号：US11509909B2

公开(公告)日：2022-11-22

申请号：US16984856

申请日：2020-08-04

Applicant: NEC CORPORATION

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

IPC: H04N7/12 ,  H04N19/159 ,  H04N19/196 ,  H04N19/593 ,  H04N19/124 ,  H04N19/157

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.

公开(公告)号：US10728579B2

公开(公告)日：2020-07-28

申请号：US16457157

申请日：2019-06-28

Applicant: NEC Corporation

Inventor： Hirofumi Aoki ,  Keiichi Chono ,  Masato Tsukada

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

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.

公开(公告)号：US10021432B2

公开(公告)日：2018-07-10

申请号：US14888505

申请日：2014-04-11

Applicant: NEC Corporation

Inventor： Hirofumi Aoki

IPC: H04N21/234 ,  H04N19/46 ,  H04N19/152 ,  H04N19/172 ,  H04N19/127 ,  H04N19/423 ,  H04N21/236 ,  H04N21/2383 ,  H04N21/24

CPC classification number: H04N21/23406 ,  H04N19/127 ,  H04N19/152 ,  H04N19/172 ,  H04N19/423 ,  H04N19/46 ,  H04N21/23605 ,  H04N21/23608 ,  H04N21/2383 ,  H04N21/2405

Abstract: A time series data encoding apparatus includes a time series data encoding means 11 for compressing and encoding time series data thereby to generate encoded bit streams, a virtual buffer 12 for calculating a transition of the amount of data accumulated in a buffer in a virtual decoder defined according to an encoding system, a buffer usage analyzing means 13 for analyzing the transition of the amount of accumulated data thereby to reset parameters indicating a size of the buffer and the amount of accumulated data in the buffer at a predetermined time, and a multiplexing means 14 for multiplexing the encoded bit streams generated by the time series data encoding means 11 and the parameters reset by the buffer usage analyzing means 13.

公开(公告)号：US09749634B2

公开(公告)日：2017-08-29

申请号：US15238587

申请日：2016-08-16

Applicant: NEC Corporation

Inventor： Keiichi Chono ,  Hirofumi Aoki

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

CPC classification number: H04N19/126 ,  H04N19/13 ,  H04N19/154 ,  H04N19/1887 ,  H04N19/44 ,  H04N19/463 ,  H04N19/91

Abstract: An image quantization parameter encoder includes: a prediction unit for generating a predicted quantization parameter from a past reconstructed quantization parameter; a computing unit for generating a delta quantization parameter from a quantization parameter and the predicted quantization parameter; and a quantization parameter encoding unit for binary-arithmetic-encoding a first bin indicating whether the delta quantization parameter is significant; and when the delta quantization parameter is determined to be significant, other bins, which are encoded subsequent to the first bin, indicating an absolute value of the delta quantization parameter, and a sign bin, which is encoded subsequent to the other bins, indicating whether the delta quantization parameter is positive or negative, wherein the binary-arithmetic-encoding is performed using contexts for the first bin and the other bins, and using no context for the sign bin, and wherein the binary-arithmetic-encoding is performed using a first context for the first bin and using a second context for the other bins.

公开(公告)号：US09532073B2

公开(公告)日：2016-12-27

申请号：US14931181

申请日：2015-11-03

Applicant: NEC CORPORATION

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

IPC: H04N7/12 ,  H04N19/60 ,  H04N19/182 ,  H04N19/17 ,  H04N19/91

CPC classification number: H04N19/44 ,  H04N19/00781 ,  H04N19/12 ,  H04N19/156 ,  H04N19/17 ,  H04N19/172 ,  H04N19/176 ,  H04N19/182 ,  H04N19/186 ,  H04N19/46 ,  H04N19/60 ,  H04N19/61 ,  H04N19/91

Abstract: A video encoding device includes: pixel bit length increasing means for increasing a pixel bit length of an input image based on pixel bit length increase information; transform means for transforming output data of the pixel bit length increasing means; entropy encoding means for entropy-encoding output data of the transform means; non-compression encoding means for non-compression-encoding input data; multiplexed data selection means for selecting output data of the entropy encoding means or output data of the non-compression encoding means; and multiplexing means for multiplexing the pixel bit length increase information in a bitstream, wherein a pixel bit length of an image corresponding to the output data of the entropy encoding means and a pixel bit length of an image corresponding to the output data of the non-compression encoding means are different from each other.

Abstract translation: 视频编码装置包括：像素比特长度增加装置，用于基于像素比特长度增加信息增加输入图像的像素比特长度; 变换装置，用于变换像素位长度增加装置的输出数据; 熵编码装置，用于对变换装置的输出数据进行熵编码; 用于非压缩编码输入数据的非压缩编码装置; 多路复用数据选择装置，用于选择熵编码装置的输出数据或输出非压缩编码装置的数据; 以及复用装置，用于将比特流中的像素比特长度增加信息进行多路复用，其中与熵编码装置的输出数据相对应的图像的像素比特长度和与非熵编码装置的输出数据相对应的图像的像素比特长度， 压缩编码装置彼此不同。

公开(公告)号：US09510011B2

公开(公告)日：2016-11-29

申请号：US14931271

申请日：2015-11-03

Applicant: NEC CORPORATION

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

IPC: H04N7/12 ,  H04N19/44 ,  H04N19/182 ,  H04N19/172 ,  H04N19/91

CPC classification number: H04N19/44 ,  H04N19/00781 ,  H04N19/12 ,  H04N19/156 ,  H04N19/17 ,  H04N19/172 ,  H04N19/176 ,  H04N19/182 ,  H04N19/186 ,  H04N19/46 ,  H04N19/60 ,  H04N19/61 ,  H04N19/91

Abstract: A video encoding device includes: pixel bit length increasing means for increasing a pixel bit length of an input image based on pixel bit length increase information; transform means for transforming output data of the pixel bit length increasing means; entropy encoding means for entropy-encoding output data of the transform means; non-compression encoding means for non-compression-encoding input data; multiplexed data selection means for selecting output data of the entropy encoding means or output data of the non-compression encoding means; and multiplexing means for multiplexing the pixel bit length increase information in a bitstream, wherein a pixel bit length of an image corresponding to the output data of the entropy encoding means and a pixel bit length of an image corresponding to the output data of the non-compression encoding means are different from each other.

公开(公告)号：US20150181240A1

公开(公告)日：2015-06-25

申请号：US14409220

申请日：2013-05-31

Applicant: NEC Corporation

Inventor： Hirofumi Aoki ,  Keiichi Chono ,  Masato Tsukada

IPC: H04N19/68 ,  H04N19/44 ,  H04N19/50

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.

Abstract translation: 视频编码器101基于预测对输入运动图像的图像数据进行编码，并生成编码图像的视频比特流。 刷新控制器102刷新，使得图片中的部分区域被假设为要刷新的单位区域，并且要刷新的单位区域逐个逐个移动。 支持显示的区域编码器103对每个图像的可启用显示区域进行编码，并在刷新时生成支持显示的区域信息比特流。 复用器104多路复用视频比特流和支持显示的区域信息比特流。

公开(公告)号：US20240163449A1

公开(公告)日：2024-05-16

申请号：US18420902

申请日：2024-01-24

Applicant: NEC Corporation

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

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

CPC classification number: H04N19/147 ,  H04N19/103 ,  H04N19/109 ,  H04N19/119 ,  H04N19/157 ,  H04N19/176 ,  H04N19/44 ,  H04N19/46 ,  H04N19/503 ,  H04N19/61 ,  H04N19/70 ,  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.