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    Video encoding method and apparatus, and video decoding method and apparatus
    41.
    发明授权
    Video encoding method and apparatus, and video decoding method and apparatus 有权

    公开(公告)号：US10560693B2

    公开(公告)日：2020-02-11

    申请号：US15778681

    申请日：2016-11-22

    Applicant: SAMSUNG ELECTRONICS CO., LTD.

    Inventor： Kwang-hyun Won ,  Chan-yul Kim ,  Sun-il Lee ,  Ki-ho Choi

    IPC: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/513 ,  H04N19/44 ,  H04N19/103

    Abstract: Provided are methods and apparatuses for encoding and decoding a coding unit of a picture outline. An image decoding method includes obtaining a prediction mode and prediction information of a current block included in a current image, from a bitstream; reconstructing the current block based on at least one of the prediction mode and the prediction information of the current block; when the prediction mode of the current block is a first prediction mode, obtaining a prediction candidate related to a second prediction mode by performing prediction according to the second prediction mode based on the reconstructed current block; and reconstructing an adjacent block reconstructed after the current block by using the prediction candidate related to the second prediction mode.

    Image coding method and device for buffer management of decoder, and image decoding method and device
    42.
    发明授权
    Image coding method and device for buffer management of decoder, and image decoding method and device 有权

    公开(公告)号：US10218984B2

    公开(公告)日：2019-02-26

    申请号：US15959694

    申请日：2018-04-23

    Applicant: SAMSUNG ELECTRONICS CO., LTD.

    Inventor： Young-o Park ,  Chan-yul Kim ,  Kwang-pyo Choi ,  Jeong-hoon Park

    IPC: H04N19/00 ,  H04N19/152 ,  H04N19/44 ,  H04N19/70

    Abstract: Provided are methods and apparatuses for encoding and decoding an image. Method of encoding includes: determining a maximum size of a buffer to decode each image frame by a decoder, a number of image frames to be reordered, and latency information of an image frame having a largest difference between an encoding order and a display order from among image frames that form an image sequence, based on an encoding order the image frames that form the image sequence, an encoding order of reference frames referred to by the image frames, a display order of the image frames, and a display order of the reference frames; and adding, to a mandatory sequence parameter set, a first syntax indicating the maximum size of the buffer, a second syntax indicating the number of image frames to be reordered, and a third syntax indicating the latency information.

    METHOD FOR DETERMINING QUANTIZATION PARAMETERS ON BASIS OF SIZE OF CONVERSION BLOCK, AND DEVICE FOR SAME
    48.
    发明申请
    METHOD FOR DETERMINING QUANTIZATION PARAMETERS ON BASIS OF SIZE OF CONVERSION BLOCK, AND DEVICE FOR SAME 审中-公开
    基于转换块尺寸的量化参数的确定方法及其设备

    公开(公告)号：US20140286406A1

    公开(公告)日：2014-09-25

    申请号：US14357041

    申请日：2012-11-08

    Applicant: SAMSUNG ELECTRONICS CO., LTD.

    Inventor： Chan-yul Kim ,  Kwang-pyo Choi ,  Young-o Park

    IPC: H04N19/126 ,  H04N19/196

    CPC classification number: H04N19/176 ,  H04N19/122 ,  H04N19/124 ,  H04N19/134 ,  H04N19/46

    Abstract: Provided are a method and apparatus for determining quantization parameter for a quantization and an inverse quantization performed during a video encoding and decoding. The quantization parameter determination method includes determining transformation units of at least one size included in a coding unit; determining a default quantization parameter of the coding unit; reducing a quantization parameter of a transformation unit that is greater than a predetermined size, to be less than the default quantization parameter; and increasing a quantization parameter of a transformation unit that is less than a predetermined size, to be greater than the default quantization parameter.

    Abstract translation: 提供了一种用于确定在视频编码和解码期间执行的量化和逆量化的量化参数的方法和装置。 量化参数确定方法包括：确定包括在编码单元中的至少一个大小的变换单位; 确定编码单元的默认量化参数; 将大于预定大小的变换单元的量化参数减小到小于默认量化参数; 以及将小于预定大小的变换单元的量化参数增加到大于默认量化参数。

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