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    Video decoding method and apparatus using multi-core transform, and video encoding method and apparatus using multi-core transform
    74.
    发明授权
    Video decoding method and apparatus using multi-core transform, and video encoding method and apparatus using multi-core transform 有权

    公开(公告)号：US11589066B2

    公开(公告)日：2023-02-21

    申请号：US16613184

    申请日：2018-07-03

    Applicant: SAMSUNG ELECTRONICS CO., LTD.

    Inventor： Ki-ho Choi ,  Min-soo Park ,  Elena Alshina

    IPC: H04N19/44 ,  H04N19/122 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186

    Abstract: A method and apparatus for performing transformation and inverse transformation on a current block by using multi-core transform kernels in video encoding and decoding processes. A video decoding method may include obtaining, from a bitstream, multi-core transformation information indicating whether multi-core transformation kernels are to be used according to a size of a current block; obtaining horizontal transform kernel information and vertical transform kernel information from the bitstream when the multi-core transformation kernels are used according to the multi-core transformation information; determining a horizontal transform kernel for the current block according to the horizontal transform kernel information; determining a vertical transform kernel for the current block according to the vertical transform kernel information; and performing inverse transformation on the current block by using the horizontal transform kernel and the vertical transform kernel.

    ENCODING METHOD AND APPARATUS THEREFOR, AND DECODING METHOD AND APPARATUS THEREFOR
    75.
    发明申请
    ENCODING METHOD AND APPARATUS THEREFOR, AND DECODING METHOD AND APPARATUS THEREFOR 有权

    公开(公告)号：US20220417553A1

    公开(公告)日：2022-12-29

    申请号：US17896608

    申请日：2022-08-26

    Applicant: SAMSUNG ELECTRONICS CO., LTD.

    Inventor： Jin-Young Lee ,  Yin-ji Piao ,  Elena Alshina

    IPC: H04N19/53 ,  H04N19/13 ,  H04N19/176 ,  H04N19/184 ,  H04N19/52

    Abstract: Provided is a video decoding method including: obtaining, from a bitstream, prediction motion vector information indicating a prediction motion vector of a current block and difference motion vector information indicating a difference motion vector of the current block; determining the prediction motion vector of the current block according to whether or not an adjacent block of the current block is decoded and the prediction motion vector information; determining a motion vector resolution of the current block according to whether or not the adjacent block of the current block is decoded; determining the difference motion vector of the current block according to the difference motion vector information; determining a motion vector of the current block according to the prediction motion vector, the motion vector resolution, and the difference motion vector; and reconstructing the current block according to the motion vector of the current block, wherein the adjacent block of the current block includes a right block of the current block.

    Encoding method and apparatus therefor, and decoding method and apparatus therefor
    76.
    发明授权
    Encoding method and apparatus therefor, and decoding method and apparatus therefor 有权

    公开(公告)号：US11432003B2

    公开(公告)日：2022-08-30

    申请号：US16648510

    申请日：2018-09-28

    Applicant: SAMSUNG ELECTRONICS CO., LTD.

    Inventor： Jin-young Lee ,  Yin-ji Piao ,  Elena Alshina

    IPC: H04N19/13 ,  H04N19/53 ,  H04N19/176 ,  H04N19/184 ,  H04N19/52

    Abstract: Provided is a video decoding method including: obtaining, from a bitstream, prediction motion vector information indicating a prediction motion vector of a current block and difference motion vector information indicating a difference motion vector of the current block; determining the prediction motion vector of the current block according to whether or not an adjacent block of the current block is decoded and the prediction motion vector information; determining a motion vector resolution of the current block according to whether or not the adjacent block of the current block is decoded; determining the difference motion vector of the current block according to the difference motion vector information; determining a motion vector of the current block according to the prediction motion vector, the motion vector resolution, and the difference motion vector; and reconstructing the current block according to the motion vector of the current block, wherein the adjacent block of the current block includes a right block of the current block.

    Method and apparatus for encoding or decoding 360 degree image
    78.
    发明授权
    Method and apparatus for encoding or decoding 360 degree image 有权

    公开(公告)号：US11252390B2

    公开(公告)日：2022-02-15

    申请号：US16477966

    申请日：2018-01-10

    Applicant: SAMSUNG ELECTRONICS CO., LTD.

    Inventor： Elena Alshina ,  Vladyslav Zakharchenko ,  Kwang-pyo Choi

    IPC: H04N13/139 ,  H04N13/178 ,  H04N19/597

    Abstract: Provided are a method and apparatus for encoding or decoding a 360-degree image. An image decoding method and apparatus according to an embodiment include: obtaining image data from a bitstream; decoding a first region of a projection image corresponding to a non-clipping region of a 360-degree image from the image data; obtaining information about a clipping region of the 360-degree image from the bitstream; determining a second region of the projection image, based on the information about the clipping region; and converting the projection image including the first region and the second region into the 360-degree image.

    Image encoding method and device for sample value compensation and image decoding method and device for sample value compensation
    79.
    发明授权
    Image encoding method and device for sample value compensation and image decoding method and device for sample value compensation 有权

    公开(公告)号：US10609377B2

    公开(公告)日：2020-03-31

    申请号：US15572614

    申请日：2015-11-12

    Applicant: SAMSUNG ELECTRONICS CO., LTD.

    Inventor： Ki-ho Choi ,  Elena Alshina

    IPC: H04N19/136 ,  H04N19/182 ,  H04N19/117 ,  H04N19/82 ,  H04N19/593

    Abstract: The present disclosure provides an image encoding method and apparatus and an image decoding method and apparatus for generating a reconstructed image having a minimized error between an original image and the reconstructed image at a high bit depth and a high bit rate.The image decoding method includes parsing offset values and an offset type from a bitstream; parsing a class based on the offset type from the bitstream; selecting a plurality of pixels from among pixels adjacent to a reconstructed pixel, based on the class, and calculating a reference value based on sample values of the plurality of pixels; determining a category based on a magnitude of a difference value between the reference value and a sample value of the reconstructed pixel; selecting an offset value from among the offset values, the offset value corresponding to the category; and compensating for the sample value of the reconstructed pixel by using the selected offset value.

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