公开(公告)号：US11310510B2

公开(公告)日：2022-04-19

申请号：US16910288

申请日：2020-06-24

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

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：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：US20170324957A1

公开(公告)日：2017-11-09

申请号：US15655500

申请日：2017-07-20

Applicant: NEC Corporation

Inventor： Keiichi CHONO ,  Hirofumi Aoki

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

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

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：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.

公开(公告)号：US11659188B2

公开(公告)日：2023-05-23

申请号：US17686723

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：US20220191505A1

公开(公告)日：2022-06-16

申请号：US17685543

申请日：2022-03-03

Applicant: NEC Corporation

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

IPC: H04N19/139 ,  H04N19/61 ,  H04N19/109 ,  H04N19/119 ,  H04N19/176 ,  H04N19/46 ,  H04N19/51 ,  H04N19/147 ,  H04N19/70

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.

公开(公告)号：US11017507B2

公开(公告)日：2021-05-25

申请号：US16467146

申请日：2016-12-20

Applicant: NEC Corporation

Inventor： Madhuri Mahendra Nagare ,  Eiji Kaneko ,  Hirofumi Aoki

IPC: G06K9/34 ,  G06T5/00 ,  G06K9/38 ,  G06T5/40

Abstract: An image processing device which is capable of accurately detects and corrects areas affected by clouds even if multiple types or layers of clouds present in images, is disclosed. The device includes: a cloud spectrum selection unit for selecting at least one spectrum for each of pixels from spectra of one or more clouds present in an input image; an endmember extraction unit for extracting spectra of one or more endmembers other than the one or more clouds from those of the input image; and an unmixing unit for deriving fractional abundances of the respective spectra of one or more endmembers and a selected spectrum of one of the one or more clouds for the each of pixels in the input image.

公开(公告)号：US10110892B2

公开(公告)日：2018-10-23

申请号：US14355455

申请日：2012-10-25

Applicant: NEC Corporation

Inventor： Keiichi Chono ,  Hirofumi Aoki ,  Yuzo Senda

IPC: H04N19/70 ,  H04N19/12 ,  H04N19/13 ,  H04N19/176 ,  H04N19/156 ,  H04N19/463

Abstract: A video encoding device includes: a transformer for transforming an image block; an entropy encoder for entropy-encoding transformed data of the image block transformed by the transformer; a PCM encoder for PCM-encoding an image block; a multiplexed data selector for selecting output data of the entropy encoder or output data of the PCM encoder, for each block of an externally set block size; and a multiplexer for embedding a PCM header into a bitstream, in a block of the externally set block size, wherein the number of successive PCM-encoded blocks is embedded into the PCM header, and PCM data for the number of successive PCM-encoded blocks is multiplexed into the bitstream.

公开(公告)号：US20160360203A1

公开(公告)日：2016-12-08

申请号：US15238587

申请日：2016-08-16

Applicant: NEC Corporation

Inventor： Keiichi CHONO ,  Hirofumi Aoki

IPC: H04N19/126 ,  H04N19/44 ,  H04N19/13

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.

Abstract translation: 图像量化参数编码器包括：预测单元，用于从过去的重建量化参数生成预测量化参数; 计算单元，用于从量化参数和所述预测量化参数产生增量量化参数; 以及量化参数编码单元，用于对指示所述增量量化参数是否有效的第二存储体进行二进制运算编码; 并且当Δ量化参数被确定为有效时，在第一个仓之后被编码的指示增量量化参数的绝对值的其他箱和在另一箱之后被编码的符号仓，指示是否 Δ量化参数是正或负，其中使用用于第一bin和另一个bin的上下文来执行二进制算术编码，并且不使用用于符号仓的上下文，并且其中二进制算术编码是使用 第一个bin的第一个上下文，另一个bin使用第二个context。