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122 条记录 (耗时 0.012 秒)

    INHERITANCE IN SAMPLE ARRAY MULTITREE SUBDIVISION
    1.
    发明公开
    INHERITANCE IN SAMPLE ARRAY MULTITREE SUBDIVISION 审中-公开

    公开(公告)号：EP4407987A3

    公开(公告)日：2024-10-23

    申请号：EP24167382.1

    申请日：2011-04-13

    申请人： GE Video Compression, LLC

    发明人： HELLE, Philipp ,  MARPE, Detlev ,  OUDIN, Simon ,  WIEGAND, Thomas

    IPC分类号： H04N19/463 ,  H04N19/52 ,  H04N19/96 ,  H04N19/53 ,  H04N19/593

    摘要： A better compromise between encoding complexity and achievable rate distortion ratio, and/or to achieve a better rate distortion ratio is achieved by using multitree sub-divisioning not only in order to subdivide a continuous area, namely the sample array, into leaf regions, but using the intermediate regions also to share coding parameters among the corresponding collocated leaf blocks. By this measure, coding procedures performed in tiles - leaf regions - locally, may be associated with coding parameters individually without having to, however, explicitly transmit the whole coding parameters for each leaf region separately. Rather, similarities may effectively exploited by using the multitree subdivision.

    METHOD AND APPARATUS FOR INTER PREDICTION IN VIDEO CODING SYSTEM
    4.
    发明公开
    METHOD AND APPARATUS FOR INTER PREDICTION IN VIDEO CODING SYSTEM 审中-公开

    公开(公告)号：EP4246979A3

    公开(公告)日：2023-11-01

    申请号：EP23185244.3

    申请日：2019-04-24

    申请人： LG Electronics Inc.

    发明人： LEE, Jaeho

    IPC分类号： H04N19/53 ,  H04N19/513 ,  H04N19/129 ,  H04N19/105 ,  H04N19/176 ,  H04N19/52 ,  H04N19/70

    摘要： The present disclosure relates to a method by which a decoding apparatus performs video coding, comprising the steps of: generating a motion information candidate list for a current block; selecting one candidate from among those included in the motion information candidate list; deriving control point motion vectors (CPMVs) of the current block based on the selected candidate; deriving sub-block-unit or sample-unit motion vectors of the current block based on the CPMVs; deriving a predicted block based on the motion vectors; and reconstructing a current picture based on the predicted block, wherein the motion information candidate list includes an inherited affine candidate, the inherited affine candidate is derived based on candidate blocks coded by affine prediction, from among spatial neighboring blocks of the current block, and the inherited affine candidate is generated up to a pre-defined maximum number.

    VIDEO PICTURE CODING METHOD, VIDEO PICTURE DECODING METHOD, CODING DEVICE, AND DECODING DEVICE
    6.
    发明公开
    VIDEO PICTURE CODING METHOD, VIDEO PICTURE DECODING METHOD, CODING DEVICE, AND DECODING DEVICE 审中-公开

    公开(公告)号：EP4033765A1

    公开(公告)日：2022-07-27

    申请号：EP21205488.6

    申请日：2016-03-30

    申请人： Huawei Technologies Co., Ltd.

    发明人： ZHANG, Hong ,  YANG, Haitao

    IPC分类号： H04N19/52 ,  H04N19/139 ,  H04N19/176 ,  H04N19/119 ,  H04N19/196 ,  H04N19/53 ,  H04N19/54 ,  H04N19/513

    摘要： The present invention provides a video picture coding method, a video picture decoding method, a coding device, and a decoding device. The method includes: determining a motion vector difference of an affine picture block; determining motion vector precision of the affine picture block; determining a size of an affine motion compensation picture subblock in the affine picture block according to the motion vector difference, the motion vector precision, and a distance between control points in the affine picture block, where the control points are pixels used to determine the motion vector difference; and performing coding processing on the affine picture block according to the size of the affine motion compensation picture subblock. In this way, a picture subblock of an appropriate size is selected, so that coding complexity can be reduced, and coding efficiency can be improved.

    VIDEO DECODING METHOD AND APPARATUS AND VIDEO ENCODING METHOD AND APPARATUS
    8.
    发明公开
    VIDEO DECODING METHOD AND APPARATUS AND VIDEO ENCODING METHOD AND APPARATUS 审中-公开

    公开(公告)号：EP3761643A1

    公开(公告)日：2021-01-06

    申请号：EP19760602.3

    申请日：2019-02-27

    申请人： Samsung Electronics Co., Ltd.

    发明人： JEONG, Seungsoo ,  PARK, Minwoo ,  SOHN, Yumi ,  CHOI, Kiho

    IPC分类号： H04N19/53 ,  H04N19/70 ,  H04N19/176 ,  H04N19/109

    摘要： Provided are a video encoding and decoding method and apparatus for obtaining, in a video encoding and decoding process, motion vector resolution information from a bit stream by using a high-level syntax which is a group of information that is applied to a predefined data unit group; determining a motion vector resolution of a current block included in the predefined data unit group based on the motion vector resolution information; determining a prediction motion vector of the current block to be a motion vector of a candidate block from among at least one candidate block, based on the motion vector resolution of the current block; and determining a motion vector of the current block by using the prediction motion vector of the current block.

    AFFINE MOTION PREDICTION-BASED IMAGE DECODING METHOD AND APPARATUS USING AFFINE MVP CANDIDATE LIST IN IMAGE CODING SYSTEM
    9.
    发明公开
    AFFINE MOTION PREDICTION-BASED IMAGE DECODING METHOD AND APPARATUS USING AFFINE MVP CANDIDATE LIST IN IMAGE CODING SYSTEM 审中-公开

    公开(公告)号：EP3700216A1

    公开(公告)日：2020-08-26

    申请号：EP19859025.9

    申请日：2019-09-10

    申请人： LG Electronics Inc.

    发明人： LEE, Jaeho

    IPC分类号： H04N19/53 ,  H04N19/105 ,  H04N19/176 ,  H04N19/137

    摘要： A method by which a decoding apparatus performs image decoding, according to the present document, comprises the steps of: obtaining motion prediction information about a current block from a bitstream; generating an affine MVP candidate list for the current block; deriving CPMVPs for CPs of the current block on the basis of the affine MVP candidate list; deriving CPMVDs for the CPs of the current block on the basis of the motion prediction information; deriving CPMVs for the CPs of the current block on the basis of the CPMVPs and the CPMVDs; and deriving prediction samples for the current block on the basis of the CPMVs.