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    ENCODING DEVICE, DECODING DEVICE AND PROGRAM
    2.
    发明公开
    ENCODING DEVICE, DECODING DEVICE AND PROGRAM 审中-公开

    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.

    ENCODING DEVICE, DECODING DEVICE AND PROGRAM
    3.
    发明申请
    ENCODING DEVICE, DECODING DEVICE AND PROGRAM 有权

    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.

    DECODING DEVICE, PROGRAM, AND DECODING METHOD
    4.
    发明申请
    DECODING DEVICE, PROGRAM, AND DECODING METHOD 有权

    公开(公告)号：US20220217367A1

    公开(公告)日：2022-07-07

    申请号：US17655991

    申请日：2022-03-22

    申请人： Nippon Hoso Kyokai

    发明人： Shunsuke IWAMURA ,  Shimpei Nemoto ,  Atsuro Ichigaya

    IPC分类号： H04N19/186 ,  H04N19/176 ,  H04N19/119 ,  H04N19/18 ,  H04N19/91 ,  H04N19/124 ,  H04N19/60 ,  H04N19/46 ,  H04N19/30

    摘要： A method includes: decoding a bitstream and thereby outputting a transform coefficients for each color component of the block, a first flag indicating for each color component whether the block includes a non-zero transform coefficient, and a second flag indicating whether the block has been encoded using a color space transform that transforming a color space of a prediction residual from a color space of the original image to another color space; performing a color space inverse transform for the prediction residual restored from the transform coefficients, when the second flag indicates that the block has been encoded using the color space transform; and determining whether to perform chroma residual scaling for the prediction residual of the chrominance component, based on the first flag of a chrominance component and the second flag, the chroma residual scaling that performs scaling based on a luminance component corresponding to the chrominance component.

    ENCODING DEVICE, DECODING DEVICE AND PROGRAM
    5.
    发明申请
    ENCODING DEVICE, DECODING DEVICE AND PROGRAM 有权

    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.

    IMAGE ENCODING DEVICE, IMAGE DECODING DEVICE AND PROGRAM
    6.
    发明申请
    IMAGE ENCODING DEVICE, IMAGE DECODING DEVICE AND PROGRAM 有权

    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.

    IMAGE ENCODING DEVICE, IMAGE DECODING DEVICE AND PROGRAM
    9.
    发明公开
    IMAGE ENCODING DEVICE, IMAGE DECODING DEVICE AND PROGRAM 审中-公开

    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.