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Motion compensation method and device using bidirectional optical flow

專利號(hào)
US11800142B2
公開日期
2023-10-24
申請(qǐng)人
SK TELECOM CO., LTD.（KR Seoul）
發(fā)明人
Jeong-yeon Lim; Hyo Song Kim; Hyeong-duck Kim; Se-hoon Son; Jae-seob Shin; Gyeong-taek Lee; Sun-young Lee
IPC分類
H04N19/52; H04N19/105; H04N19/14; H04N19/176
技術(shù)領(lǐng)域
motion,block,bio,prediction,vector,current,picture,vy,in,subblock
地域： Seoul

摘要

Disclosed herein is a method for adaptive bidirectional optical flow estimation for inter-screen prediction compensation during video encoding. The method aims to reduce complexity and/or cost of bidirectional optical flow (BIO) at a pixel level or a subblock level.

說明書

In S1330, the motion compensation device 1000 determines whether the horizontal complexity D1 is less than the threshold T (S1331). When the horizontal complexity D1 is less than the threshold T, the horizontal optical flow vx is set to 0 (S1332). This means that the horizontal optical flow is not applied. When the horizontal complexity D1 is greater than or equal to the threshold T, d3 is calculated (S1333), and s1 and s3 are calculated using d1 and d3 (S1334). Referring to Equations 7 to 9, when the horizontal optical flow vx is calculated, only s1 and s3 are required. Since d1 has already been calculated in S1320, d3 is calculated in S1333 and s1 and s3 are calculated in S1334 using d1 and d3. Then, the horizontal optical flow vx is calculated using s1 and s3 according to any one of Equations 7 to 9 (S1335).

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