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    Video decoding method and apparatus and video encoding method and apparatus
    81.
    发明授权
    Video decoding method and apparatus and video encoding method and apparatus 有权

    公开(公告)号：US11051033B2

    公开(公告)日：2021-06-29

    申请号：US16476173

    申请日：2018-01-04

    Applicant: SAMSUNG ELECTRONICS CO., LTD.

    Inventor： Alexander Alshin ,  Elena Alshina

    IPC: H04N19/513 ,  H04N19/105 ,  H04N19/139 ,  H04N19/159 ,  H04N19/176

    Abstract: Provided is a video decoding method including determining a displacement vector per unit time of pixels of a current block in a horizontal direction or a vertical direction, the pixels including a pixel adjacent to an inside of a boundary of the current block, by using values about reference pixels included in a first reference block and a second reference block, without using a stored value about a pixel located outside boundaries of the first reference block and the second reference block; and obtaining a prediction block of the current block by performing block-unit motion compensation and pixel group unit motion compensation on the current block by using a gradient value in the horizontal direction or the vertical direction of a first corresponding reference pixel in the first reference block which corresponds to a current pixel included in a current pixel group in the current block, a gradient value in the horizontal direction or the vertical direction of a second corresponding reference pixel in the second reference block which corresponds to the current pixel, a pixel value of the first corresponding reference pixel, a pixel value of the second corresponding reference pixel, and a displacement vector per unit time of the current pixel in the horizontal direction or the vertical direction. In this regard, the current pixel group may include at least one pixel.

    Video encoding method and video encoding for signaling SAO parameters
    83.
    发明授权
    Video encoding method and video encoding for signaling SAO parameters 有权

    公开(公告)号：US10277903B2

    公开(公告)日：2019-04-30

    申请号：US15727003

    申请日：2017-10-06

    Applicant: SAMSUNG ELECTRONICS CO., LTD.

    Inventor： Elena Alshina ,  Alexander Alshin ,  Jeong-hoon Park

    IPC: H04N19/14 ,  H04N19/103 ,  H04N19/186 ,  H04N19/13 ,  H04N19/82 ,  H04N19/91 ,  H04N19/463 ,  H04N19/86

    Abstract: The present disclosure relates to signaling of sample adaptive offset (SAO) parameters determined to minimize an error between an original image and a reconstructed image in video encoding and decoding operations. An SAO decoding method includes obtaining context-encoded leftward SAO merge information and context-encoded upward SAO merge information from a bitstream of a largest coding unit (MCU); obtaining SAO on/off information context-encoded with respect to each color component, from the bitstream; if the SAO on/off information indicates to perform SAO operation, obtaining absolute offset value information for each SAO category bypass-encoded with respect to each color component, from the bitstream; and obtaining one of band position information and edge class information bypass-encoded with respect to each color component, from the bitstream.

    Video encoding method using offset adjustment according to classification of pixels by maximum encoding units and apparatus thereof, and video decoding method and apparatus thereof
    89.
    发明授权
    Video encoding method using offset adjustment according to classification of pixels by maximum encoding units and apparatus thereof, and video decoding method and apparatus thereof 有权
    使用通过最大编码单位及其装置的像素分类的偏移调整的视频编码方法及其视频解码方法及其装置

    公开(公告)号：US09525882B2

    公开(公告)日：2016-12-20

    申请号：US14656354

    申请日：2015-03-12

    Applicant: SAMSUNG ELECTRONICS CO., LTD.

    Inventor： Elena Alshina ,  Alexander Alshin

    IPC: H04N19/70 ,  H04N19/176 ,  H04N19/117 ,  H04N19/463 ,  H04N19/14 ,  H04N19/182 ,  H04N19/82 ,  H04N19/96 ,  H04N19/186 ,  H04N19/65 ,  H04N19/136

    CPC classification number: H04N19/176 ,  H04N19/117 ,  H04N19/136 ,  H04N19/14 ,  H04N19/182 ,  H04N19/186 ,  H04N19/463 ,  H04N19/65 ,  H04N19/82 ,  H04N19/96

    Abstract: A video decoding method includes extracting offset mergence information of a current largest coding unit (LCU), the offset mergence information indicating whether to adopt a second offset parameter as a first offset parameter of the current LCU; reconstructing the first offset parameter of the current LCU based on the offset mergence information, the first offset parameter including an offset type, an offset value, and an offset class of the current LCU; determining whether the current LCU is an edge type or a band type, based on the offset type; determining an edge direction according to the edge type or a band range according to the band type, based on the offset class; determining a difference value between reconstructed pixels and original pixels included in the offset class, based on the offset value; and adjusting pixel values of reconstructed pixels based on the difference value.

    Abstract translation: 视频解码方法包括提取当前最大编码单元（LCU）的偏移合并信息，该偏移合并信息指示是否采用第二偏移参数作为当前LCU的第一偏移参数; 基于偏移合并信息重构当前LCU的第一偏移参数，第一偏移参数包括当前LCU的偏移类型，偏移值和偏移等级; 基于偏移类型确定当前LCU是边缘类型还是带类型; 基于偏移等级，根据边缘类型或根据频带类型的频带范围确定边缘方向; 基于所述偏移值来确定所述偏移类别中包括的重建像素与原始像素之间的差值; 以及基于所述差值来调整重构像素的像素值。

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