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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
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.
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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
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.
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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
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.
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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
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.
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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
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.
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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
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.
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公开(公告)号：US20240080476A1
公开(公告)日：2024-03-07
申请号：US18504619
申请日：2023-11-08
申请人： NIPPON HOSO KYOKAI
IPC分类号： H04N19/593 , H04N19/105 , H04N19/11 , H04N19/119 , H04N19/13 , H04N19/176 , H04N19/61
CPC分类号： H04N19/593 , H04N19/105 , H04N19/11 , H04N19/119 , H04N19/13 , H04N19/176 , H04N19/61
摘要： An image encoding device 1 that encodes an encoding target block obtained by dividing an image, the image encoding device including: an intra predictor 172 configured to predict the encoding target block through intra prediction to generate a prediction block; and a transformer 121 configured to perform orthogonal transform processing on a prediction residual representing an error of the prediction block with respect to the encoding target block. The intra predictor includes: a weighted controller 172c configured to control the weighted combining processing dependent on positions of prediction pixels within the prediction block based on a type of transform to be applied in the orthogonal transform processing in the transformer; and a corrector 172b configured to correct the prediction pixels by performing the weighted combining processing on reference pixels adjacent to the encoding target block and the prediction pixels.
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公开(公告)号：US20220329863A1
公开(公告)日：2022-10-13
申请号：US17849233
申请日：2022-06-24
申请人： NIPPON HOSO KYOKAI
IPC分类号： H04N19/61
摘要： An encoding device performing an encoding process in units of blocks into which images constituted by luminance signals and chrominance signals are divided includes: a predictor configured to predict a target chrominance block which is an encoding target block of the chrominance signals and generate a prediction chrominance block; a residual generator configured to generate a chrominance prediction residual indicating a difference between the target chrominance block and the prediction chrominance block; and a transformer configured to apply a transform process to the chrominance prediction residual and generate transform coefficients, wherein the transformer is configured to control, according to a signal format of the images, a transform type to be applied to the transform process.
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公开(公告)号：US20220279170A1
公开(公告)日：2022-09-01
申请号：US17749446
申请日：2022-05-20
申请人： NIPPON HOSO KYOKAI
IPC分类号： H04N19/105 , H04N19/159 , H04N19/186 , H04N19/176
摘要： An intra prediction device predicts, by intra prediction, a luminance block and a chrominance block obtained by dividing an image. The intra prediction device includes a cross-component linear model predictor configured to predict the chrominance block from a decoded luminance block at a position corresponding to a position of the chrominance block using a linear model calculated from respective luminance and chrominance reference pixels around the chrominance block. The cross-component linear model predictor includes a reference pixel position selector configured to select linear model calculation pixel positions that are positions of the reference pixels to be used to calculate the linear model based on a luminance intra prediction mode that is an intra prediction mode applied to the intra prediction of the decoded luminance block.
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公开(公告)号：US20220217348A1
公开(公告)日：2022-07-07
申请号：US17655931
申请日：2022-03-22
申请人： NIPPON HOSO KYOKAI
IPC分类号： H04N19/126 , H04N19/61 , H04N19/186 , H04N19/176
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.
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