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1. 发明授权

US11483571B2 Video decoding device and method using inverse quantization 有权
公开(公告)号：US11483571B2
公开(公告)日：2022-10-25
申请号：US16984913
申请日：2020-08-04
申请人： NEC CORPORATION
发明人： Hirofumi Aoki , Keiichi Chono , Yuzo Senda , Kenta Senzaki
IPC分类号： H04N7/12 , H04N19/159 , H04N19/196 , H04N19/593 , H04N19/124 , H04N19/157
摘要： 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.

2. 发明申请

US20220232223A1 VIDEO ENCODING DEVICE, VIDEO DECODING DEVICE, VIDEO ENCODING METHOD, VIDEO DECODING METHOD, AND PROGRAM 有权
公开(公告)号：US20220232223A1
公开(公告)日：2022-07-21
申请号：US17686727
申请日：2022-03-04
申请人： NEC Corporation
发明人： Keiichi Chono , Yuzo Senda , Junji Tajime , Hirofumi Aoki , Kenta Senzaki
IPC分类号： H04N19/156 , H04N19/503 , H04N19/176 , H04N19/46 , H04N19/61 , H04N19/593 , H04N19/12 , H04N19/172 , H04N19/184
摘要： 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.

3. 发明授权

US11227367B2 Image processing device, image processing method and storage medium 有权
公开(公告)号：US11227367B2
公开(公告)日：2022-01-18
申请号：US16644560
申请日：2017-09-08
申请人： NEC Corporation
发明人： Madhuri Mahendra Nagare , Hirofumi Aoki , Kazutoshi Sagi
IPC分类号： G06T5/00 , G06T7/12
摘要： An image processing device which is capable of accurately detect pixels covered by cloud shadows and remove effects of the cloud shadows in an images are provided. The device includes: a cloud transmittance calculation unit that calculates transmittance of the one or more clouds in an input image, for each pixel; a cloud height estimation unit that determines estimation of a height from the ground to each cloud in the input image to detect position of corresponding one or more shadows; an attenuation factor estimation unit that calculates attenuation factors for the direct sun irradiance by applying an averaging filter to the cloud transmittance calculated; and a shadow removal unit that corrects pixels affected by the one or more shadows, based on a physical model of a cloud shadow formation by employing the attenuation factors calculated and the position, and outputs an image which includes the pixels corrected.

4. 发明授权

US10097847B2 Video encoding device, video decoding device, video encoding method, video decoding method, and program 有权
公开(公告)号：US10097847B2
公开(公告)日：2018-10-09
申请号：US15344635
申请日：2016-11-07
申请人： NEC CORPORATION
发明人： Keiichi Chono , Yuzo Senda , Junji Tajime , Hirofumi Aoki , Kenta Senzaki
IPC分类号： H04N7/12 , H04N19/44 , H04N19/61 , H04N19/91 , H04N19/182
摘要： 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.

5. 发明授权

US09712826B2 Video encoding device, video decoding device, video encoding method, video decoding method, and program 有权
公开(公告)号：US09712826B2
公开(公告)日：2017-07-18
申请号：US14877453
申请日：2015-10-07
申请人： NEC CORPORATION
发明人： Kenta Senzaki , Yuzo Senda , Keiichi Chono , Hirofumi Aoki
IPC分类号： H04N19/119 , H04N19/109 , H04N19/147 , H04N19/157 , H04N19/176 , H04N19/44 , H04N19/46 , H04N19/503 , H04N19/61 , H04N19/65 , H04N19/70 , H04N19/91
CPC分类号： H04N19/147 , H04N19/109 , H04N19/119 , H04N19/157 , H04N19/176 , H04N19/44 , H04N19/46 , H04N19/503 , H04N19/61 , H04N19/65 , H04N19/70 , H04N19/91
摘要： A video decoding device for decoding video using inter prediction comprises decoding control unit setting partition type of CU to be decoded to a type other than N×N which indicates a size of PU obtained by dividing a CU to be decoded is a minimum size, when a prediction mode of the CU to be decoded is an inter prediction and a size of the CU to be decoded is equal to a minimum CU size.

6. 发明申请

US20150181213A1 VIDEO ENCODING DEVICE, VIDEO DECODING DEVICE, VIDEO ENCODING METHOD, VIDEO DECODING METHOD, AND PROGRAM 审中-公开
标题翻译：视频编码设备，视频解码设备，视频编码方法，视频解码方法和程序
公开(公告)号：US20150181213A1
公开(公告)日：2015-06-25
申请号：US14409581
申请日：2013-05-31
申请人： NEC Corporation
发明人： Keiichi Chono , Hirofumi Aoki
IPC分类号： H04N19/13 , H04N19/60 , H04N19/176 , H04N19/70 , H04N19/159
CPC分类号： H04N19/13 , H04N19/12 , H04N19/159 , H04N19/176 , H04N19/60 , H04N19/70
摘要： A video encoding device includes a transformer for transforming an image block, an entropy encoder (103) for entropy encoding transformed data of the image block transformed by the transformer, a PCM encoder (1070) for PCM encoding the image block, and a multiplexed data selector (109) for selecting output data of any one of the entropy encoder (103) and the PCM encoder (1070) for each image block. The PCM encoder (1070) embeds, at the beginning of PCM data, a subsequent_pcm_flag syntax indicating whether an image block of PCM data follows or not.
摘要翻译：视频编码装置包括用于变换图像块的变换器，用于对由变压器变换的图像块的变换数据进行熵编码的熵编码器（103），用于对该图像块进行PCM编码的PCM编码器（1070）和多路复用数据选择器（109），用于为每个图像块选择熵编码器（103）和PCM编码器（1070）中的任何一个的输出数据。 PCM编码器（1070）在PCM数据的开始处嵌入指示PCM数据的图像块是否跟随的随后的pcm_flag语法。

7. 发明申请

US20140307790A1 VIDEO ENCODING DEVICE, VIDEO DECODING DEVICE, VIDEO ENCODING METHOD, VIDEO DECODING METHOD, AND PROGRAM 审中-公开
标题翻译：视频编码设备，视频解码设备，视频编码方法，视频解码方法和程序
公开(公告)号：US20140307790A1
公开(公告)日：2014-10-16
申请号：US14355697
申请日：2012-10-25
申请人： NEC Corporation
发明人： Keiichi Chono , Hirofumi Aoki
IPC分类号： H04N19/50
CPC分类号： H04N19/132 , H04N19/105 , H04N19/16 , H04N19/182 , H04N19/186 , H04N19/59 , H04N19/61 , H04N19/70
摘要： A video encoding device includes a down-sampler with sampling position shifter 107 configured to down-sample a luminance signal, and a predictor 101 configured to linearly predict a color difference signal from a down-sampled luminance signal. The down-sampler with sampling position shifter 107 shifts a sampling position of the down-sampled luminance signal in accordance with a scan to be processed. A video decoding device includes a down-sampler with sampling position shifter 205 configured to down-sample a luminance signal, and a predictor 203 configured to linearly predict a color difference signal from a down-sampled luminance signal. The down-sampler with sampling position shifter 205 shifts a sampling position in the down-sampled luminance signal in accordance with a scan to be processed.
摘要翻译：视频编码装置包括具有采样位置移位器107的下采样器，其被配置为对亮度信号进行下采样，以及预测器101，被配置为从下采样的亮度信号线性地预测色差信号。具有采样位置移位器107的下采样器根据要处理的扫描来移位下采样亮度信号的采样位置。视频解码装置包括具有被配置为对亮度信号进行下采样的采样位置移位器205的下采样器，以及配置为从下采样亮度信号线性预测色差信号的预测器203。具有采样位置移位器205的下采样器根据要处理的扫描来移位下采样亮度信号中的采样位置。

8. 发明授权

US11582461B2 Video encoding device, video decoding device, video encoding method, video decoding method, and program restricts inter-prediction unit partitions based on coding unit depth 有权
公开(公告)号：US11582461B2
公开(公告)日：2023-02-14
申请号：US17066136
申请日：2020-10-08
申请人： NEC CORPORATION
发明人： Kenta Senzaki , Yuzo Senda , Keiichi Chono , Hirofumi Aoki
IPC分类号： H04N19/103 , H04N19/147 , H04N19/503 , H04N19/176 , H04N19/70 , H04N19/119 , H04N19/46 , H04N19/61 , H04N19/109 , H04N19/157 , H04N19/44 , H04N19/91 , H04N19/65
摘要： 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.

9. 发明授权

US11412261B2 Video decoding device, method, and program 有权
公开(公告)号：US11412261B2
公开(公告)日：2022-08-09
申请号：US16905811
申请日：2020-06-18
申请人： NEC Corporation
发明人： Hirofumi Aoki , Keiichi Chono , Masato Tsukada
IPC分类号： H04N19/68 , H04N19/159 , H04N19/105 , H04N19/107 , H04N19/50 , H04N19/196 , H04N19/70 , H04N19/167 , H04N19/174 , H04N19/44
摘要： 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.

10. 发明申请

US20220109881A1 VIDEO DECODING DEVICE, METHOD, AND PROGRAM 有权
公开(公告)号：US20220109881A1
公开(公告)日：2022-04-07
申请号：US17554960
申请日：2021-12-17
申请人： NEC Corporation
发明人： Hirofumi Aoki , Keiichi Chono , Masato Tsukada
IPC分类号： H04N19/68 , H04N19/50 , H04N19/159 , H04N19/196 , H04N19/70 , H04N19/105 , H04N19/107 , H04N19/167 , H04N19/174 , H04N19/44
摘要： A video decoding device includes a demultiplexing unit which demultiplexes a video bitstream including video data of an encoded slice, first Supplemental-Enhancement-Information having information indicating segments where a refresh has completed in a current picture, and second Supplemental-Enhancement-Information having information indicating a synchronization starting picture and a synchronization completed picture, an extracting unit which extracts the information indicating segments where a refresh has completed in a current picture 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 prediction, wherein the synchronization starting picture is a leading picture within a refreshing period, and the synchronization completed picture is the end position of the refreshing period.

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