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    VIDEO DECODING METHOD AND APPARATUS USING MULTI-CORE TRANSFORM, AND VIDEO ENCODING METHOD AND APPARATUS USING MULTI-CORE TRANSFORM
    2.
    发明申请
    VIDEO DECODING METHOD AND APPARATUS USING MULTI-CORE TRANSFORM, AND VIDEO ENCODING METHOD AND APPARATUS USING MULTI-CORE TRANSFORM 审中-公开

    公开(公告)号：US20200177901A1

    公开(公告)日：2020-06-04

    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 ,  H04N19/176 ,  H04N19/159 ,  H04N19/186 ,  H04N19/122

    Abstract: Provided are 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. According to an aspect of the present disclosure, 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.

    IMAGE ENCODING METHOD AND DEVICE FOR SAMPLE VALUE COMPENSATION AND IMAGE DECODING METHOD AND DEVICE FOR SAMPLE VALUE COMPENSATION
    3.
    发明申请
    IMAGE ENCODING METHOD AND DEVICE FOR SAMPLE VALUE COMPENSATION AND IMAGE DECODING METHOD AND DEVICE FOR SAMPLE VALUE COMPENSATION 审中-公开

    公开(公告)号：US20180124408A1

    公开(公告)日：2018-05-03

    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

    CPC classification number: H04N19/136 ,  H04N19/117 ,  H04N19/182 ,  H04N19/593 ,  H04N19/82

    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.

    ENCODING DEVICE, DECODING DEVICE, AND ENCODING AND DECODING METHOD THEREOF
    8.
    发明申请
    ENCODING DEVICE, DECODING DEVICE, AND ENCODING AND DECODING METHOD THEREOF 审中-公开

    公开(公告)号：US20180205958A1

    公开(公告)日：2018-07-19

    申请号：US15743941

    申请日：2016-07-26

    Applicant: SAMSUNG ELECTRONICS CO., LTD.

    Inventor： Yin-ji PIAO ,  Ki-ho CHOI

    IPC: H04N19/18 ,  H04N19/129 ,  H04N19/119 ,  H04N19/70

    CPC classification number: H04N19/18 ,  H04N19/119 ,  H04N19/129 ,  H04N19/167 ,  H04N19/70

    Abstract: An encoding device for encoding a bit stream including an image frame may include an encoder configured to determine a position of a pixel having a last non-zero coefficient in a conversion coefficient block constituting the image frame with reference to a predetermined pixel of the conversion coefficient block, identify a sub-block including the last non-zero coefficient, among a plurality of sub-blocks constituting the conversion coefficient block, convert a position of the last non-zero coefficient determined with reference to the predetermined pixel of the conversion coefficient block into a position with reference to a predetermined pixel of the identified sub-block, and encode the sub-block including the last non-zero coefficient and the converted position of the last non-zero coefficient.

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