公开(公告)号：US20240297995A1

公开(公告)日：2024-09-05

申请号：US18662931

申请日：2024-05-13

申请人： NIPPON HOSO KYOKAI

发明人： Shunsuke IWAMURA ,  Atsuro ICHIGAYA ,  Shimpei NEMOTO

IPC分类号： H04N19/119 ,  H04N19/122 ,  H04N19/124 ,  H04N19/167 ,  H04N19/176 ,  H04N19/61 ,  H04N19/91

CPC分类号： H04N19/119 ,  H04N19/122 ,  H04N19/124 ,  H04N19/167 ,  H04N19/176 ,  H04N19/61 ,  H04N19/91

摘要： An image encoding device (1) encodes a block-based target image. The image encoding device (1) comprises: a predictor (109) configured to generate a prediction image corresponding to the target image by performing prediction using a plurality of reference images; an evaluator (111) configured to evaluate a degree of similarity between the plurality of reference images on a pixel-by-pixel basis; a calculator (101) configured to calculate a prediction residual indicating a pixel-based difference between the target image and the prediction image; a determiner (112) configured to determine a partial area, to which an orthogonal transform and quantization are to be applied, of the prediction residual based on a result of the evaluation by the evaluator; and a transformer/quantizer (102) configured to perform an orthogonal transform and quantization only for the partial area in the prediction residual.

公开(公告)号：US20230239514A1

公开(公告)日：2023-07-27

申请号：US18192525

申请日：2023-03-29

申请人： NIPPON HOSO KYOKAI

发明人： Shunsuke IWAMURA ,  Atsuro ICHIGAYA ,  Shimpei NEMOTO

IPC分类号： H04N19/86 ,  H04N19/117 ,  H04N19/124 ,  H04N19/132 ,  H04N19/176 ,  H04N19/18 ,  H04N19/61 ,  H04N19/91

CPC分类号： H04N19/86 ,  H04N19/117 ,  H04N19/124 ,  H04N19/132 ,  H04N19/176 ,  H04N19/18 ,  H04N19/61 ,  H04N19/91

摘要： An encoding device comprises: a transformer/quantizer configured to perform a transform process and a quantization process on a residual signal that represents a difference between an encoding-target block and a prediction block obtained by predicting the encoding-target block; an inverse quantizer/inverse transformer configured to restore the residual signal by performing an inverse quantization process and an inverse transform process on transform coefficients obtained by the transformer/quantizer; a combiner configured to reconstruct the encoding-target block by combining the restored residual signal and the prediction block; a deblocking filter configured to perform a filter process on a boundary between two blocks including the reconstructed block and a block adjacent to the reconstructed block; and a filter controller configured to control the deblocking filter, based on a type of the transform process applied with respect to the two blocks.

公开(公告)号：US20230040274A1

公开(公告)日：2023-02-09

申请号：US17938633

申请日：2022-10-06

申请人： NIPPON HOSO KYOKAI

发明人： Shunsuke IWAMURA ,  Shimpei NEMOTO ,  Atsuro ICHIGAYA

IPC分类号： H04N19/126 ,  H04N19/176 ,  H04N19/186 ,  H04N19/61

摘要： An encoding device encodes each encoding-target block. The encoding device includes: a predictor configured to generate, for each of the components, a prediction block corresponding to the encoding-target block; a residual generator configured to generate, for each of the components, a prediction residual that represents a difference between the encoding-target block and the prediction block; a color space transformer configured to perform a color space transform process on the prediction residual of each of the components; a transformer configured to generate transform coefficients by performing a transform process on the prediction residual; a quantization controller configured to determine a scaling list to be used in a quantization process on the transform coefficients; and a quantizer configured to perform the quantization process on the transform coefficients by using the determined scaling list, wherein the quantization controller is configured to determine the scaling list, based on the color space transform process.

公开(公告)号：US20220132127A1

公开(公告)日：2022-04-28

申请号：US17646832

申请日：2022-01-03

申请人： Nippon Hoso Kyokai

发明人： Atsuro ICHIGAYA ,  Shunsuke Iwamura ,  Yasuko Morita ,  Shinichi Sakaida

IPC分类号： H04N19/126 ,  H04N19/176 ,  H04N19/157 ,  H04N19/107 ,  H04N19/117 ,  H04N19/139 ,  H04N19/159 ,  H04N19/18 ,  H04N19/44 ,  H04N19/52 ,  H04N19/593 ,  H04N19/91

摘要： An image coding device is provided with a determination unit which determines whether to apply an orthogonal transform to a transform block obtained by dividing a prediction difference signal indicating a difference between an input image and a predicted image or perform a transform skip by which the orthogonal transform is not applied, and an orthogonal transform unit which performs processing selected on the basis of the determination, the image coding device comprising a quantization unit which, when the transform skip is selected on the basis of the determination, quantizes the transform block using a first quantization matrix in which the quantization roughnesses of all elements previously shared with a decoding side are equal, and when the orthogonal transform is applied to the transform block on the basis of the determination, quantizes the transform block using the first quantization matrix or a second quantization matrix that is transmitted to the decoding side.

公开(公告)号：US20220116665A1

公开(公告)日：2022-04-14

申请号：US17560890

申请日：2021-12-23

申请人： NIPPON HOSO KYOKAI

发明人： Shunsuke IWAMURA ,  Atsuro ICHIGAYA ,  Shimpei NEMOTO

IPC分类号： H04N19/86 ,  H04N19/124 ,  H04N19/61 ,  H04N19/176 ,  H04N19/117 ,  H04N19/132 ,  H04N19/18 ,  H04N19/91

摘要： An encoding device comprises: a transformer/quantizer configured to perform a transform process and a quantization process on a residual signal that represents a difference between an encoding-target block and a prediction block obtained by predicting the encoding-target block; an inverse quantizer/inverse transformer configured to restore the residual signal by performing an inverse quantization process and an inverse transform process on transform coefficients obtained by the transformer/quantizer; a combiner configured to reconstruct the encoding-target block by combining the restored residual signal and the prediction block; a deblocking filter configured to perform a filter process on a boundary between two blocks including the reconstructed block and a block adjacent to the reconstructed block; and a filter controller configured to control the deblocking filter, based on a type of the transform process applied with respect to the two blocks.

公开(公告)号：US20210321128A1

公开(公告)日：2021-10-14

申请号：US17354881

申请日：2021-06-22

申请人： NIPPON HOSO KYOKAI

发明人： Atsuro ICHIGAYA ,  Shinichi SAKAIDA

IPC分类号： H04N19/44 ,  H04N19/176 ,  H04N19/124

摘要： An image encoding device 1 of the present disclosure includes a neighboring pixel non-reference predictor 11 configured to generate a predicted image by a predetermined neighboring pixel non-reference prediction for each pixel signal of an original image in a block unit, a filter processor 12 configured to perform a low-pass filter process on a prediction signal located at a boundary of a block of the predicted image by using a decoded neighboring signal neighboring to the predicted image under a predetermined control, a prediction residual signal generator 55 configured to generate a prediction residual signal of the block unit by using the predicted image, an orthogonal transformer 14 configured to perform an orthogonal transformation process on the prediction residual signal of the block unit under the predetermined control, and an orthogonal transformation selection controller 25 configured to control the filter processor 12 and the orthogonal transformer 14 and generate a predetermined transformation type identification signal. An image decoding device 5 of the present disclosure performs a decoding process based on a transformation type identification signal at the time of the predetermined neighboring pixel non-reference prediction.

公开(公告)号：US20210235081A1

公开(公告)日：2021-07-29

申请号：US17205267

申请日：2021-03-18

申请人： NIPPON HOSO KYOKAI

发明人： Shunsuke IWAMURA ,  Atsuro ICHIGAYA ,  Shimpei NEMOTO

IPC分类号： H04N19/119 ,  H04N19/105 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176

摘要： An image encoding device that divides an image into blocks and encodes on each of the blocks, the image encoding device includes: a sub-area divider configured to divide a target block to be encoded into a plurality of sub-areas; a reference direction determiner configured to determine a reference direction that indicates in which direction an encoded block to be referenced is located among encoded blocks around the target block; a motion vector deriver configured to derive a motion vector for each of the sub-areas by referencing a motion vector applied in inter prediction of an encoded block located in the determined reference direction; and a prediction image generator configured to generate a prediction image on the target block by performing inter prediction on each of the sub-areas by using the derived motion vector. The image encoding device configured to encode reference direction information that indicates the determined reference direction, and output a stream.

公开(公告)号：US20180376150A1

公开(公告)日：2018-12-27

申请号：US16047339

申请日：2018-07-27

申请人： NIPPON HOSO KYOKAI

发明人： Shunsuke IWAMURA ,  Shimpei NEMOTO ,  Atsuro ICHIGAYA ,  Yasutaka MATSUO

IPC分类号： H04N19/176 ,  H04N19/172 ,  H04N19/11 ,  H04N19/159 ,  H04N19/44 ,  H04N19/124

摘要： Problem: It is possible to improve prediction accuracy and encoding efficiency without increasing the amount of information to be transmitted by an encoding device and without increasing calculation time on the encoding device side. Solution: An encoding device 1 of the present invention includes: an encoding order controller 12 configured to determine an encoding order of TU#A1 to TU#A4 in CU#A based on a prediction mode and a decoded image generator 14 configured to generate a decoded image based on the encoding order and a method of dividing CU#A into TU#A1 to TU#A4.

公开(公告)号：US20240340475A1

公开(公告)日：2024-10-10

申请号：US18733515

申请日：2024-06-04

申请人： NIPPON HOSO KYOKAI

发明人： Atsuro ICHIGAYA ,  Yuichi KONDO ,  Shimpei NEMOTO ,  Shunsuke IWAMURA

IPC分类号： H04N21/236 ,  H04N19/30 ,  H04N19/46 ,  H04N19/503 ,  H04N19/593 ,  H04N21/434 ,  H04N21/4385

CPC分类号： H04N21/23614 ,  H04N19/30 ,  H04N19/46 ,  H04N19/503 ,  H04N19/593 ,  H04N21/4348 ,  H04N21/4385

摘要： A transmitter apparatus used in a video distribution system includes: first encoding means configured to output a first stream in multi-stream encoding; second encoding means configured to output a second stream in the multi-stream encoding; and multiplexing means configured to multiplex and output the first stream and the second stream. The first encoding means outputs encoded data obtained by encoding a main video image as the first stream. The second encoding means outputs encoded data obtained by encoding a partial presentation area to be presented by being added to the main video image as the second stream.

公开(公告)号：US20240314355A1

公开(公告)日：2024-09-19

申请号：US18671524

申请日：2024-05-22

申请人： NIPPON HOSO KYOKAI

发明人： Shunsuke IWAMURA ,  Atsuro ICHIGAYA ,  Shimpei NEMOTO

IPC分类号： H04N19/573 ,  H04N19/129 ,  H04N19/137 ,  H04N19/157 ,  H04N19/176

CPC分类号： H04N19/573 ,  H04N19/129 ,  H04N19/137 ,  H04N19/157 ,  H04N19/176

摘要： An image encoding device encodes a block-based target image. The image encoding device comprises, in a transform skip mode in which orthogonal transform processing of the target image is skipped, a motion compensation predictor configured to generate a prediction image corresponding to the target image by performing motion compensation prediction using a plurality of reference images, an evaluator configured to evaluate a degree of similarity between the plurality of reference images on a pixel-by-pixel basis, a subtractor configured to calculate prediction residuals each indicating a difference between the target image and the prediction image on a pixel-by-pixel basis, a rearranger configured to rearrange the prediction residuals based on a result of evaluation by the evaluator and an encoder configured to encode the prediction residuals rearranged by the rearranger.