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Encoding method and device, and decoding method and device

專利號
US12160575B2
公開日期
2024-12-03
申請人
SAMSUNG ELECTRONICS CO., LTD.（KR Suwon-si）
發(fā)明人
Anish Tamse; Yin-ji Piao; Jin-Young Lee
IPC分類
H04N19/00; H04N19/119; H04N19/129; H04N19/139; H04N19/176
技術(shù)領(lǐng)域
coding,affine,split,unit,decoding,block,splitting,units,current,encoding
地域： Suwon-si

摘要

Provided is a video decoding method including: obtaining affine parameter group candidates of a current block based on whether adjacent blocks of the current block are decoded; determining an affine parameter group of the current block from among the affine parameter group candidates, according to affine parameter information of the current block; and reconstructing the current block, based on one or more affine parameters included in the affine parameter group.

說明書

Various affine parameter group candidates described with reference to FIGS. 23 through 27 may be used in an affine merge mode or an affine inter mode. Also, a method of determining an affine parameter group candidate may be different in the affine merge mode and the affine inter mode.

FIG. 28 is for describing a method of determining a motion vector determining method of a current block in an affine mode. Equations 8 through 10 below represent methods of determining a motion vector of a current block according to motion vector extraction locations, i.e., first through third motion vector extraction locations 2800, 2810, and 2820, of FIG. 28.

In Equations 8 and 9, w denotes the first motion vector extraction location 2800 and the second motion vector extraction location 2810. Also, h denotes a vertical distance between the first motion vector extraction location 2800 and the third motion vector extraction location 2820. Also, x denotes a horizontal distance between the first motion vector extraction location 2800 and the third motion vector extraction location 2820. Also, y denotes a vertical distance between the first motion vector extraction location 2800 and the second motion vector extraction location 2810.

P0 denotes a first motion vector, P1 denotes a second motion vector, and P2 denotes a third motion vector. Then, dx and dy respectively denote a horizontal change rate and a vertical change rate.

d ? x =

權(quán)利要求

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