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Sub-block MV inheritance between color components

專利號
US11659192B2
公開日期
2023-05-23
申請人
Beijing Bytedance Network Technology Co., Ltd.; Bytedance Inc.（CN Beijing US CA Los Angeles）
發(fā)明人
Kai Zhang; Li Zhang; Hongbin Liu; Yue Wang
IPC分類
H04N19/52; H04N19/176; H04N19/186; H04N19/55; H04N19/119; H04N19/136
技術(shù)領(lǐng)域
mv,motion,signshift,sub,mv0x,mv1x,mv0y,vectors,cu,mv1y
地域： Beijing

摘要

Devices, systems and methods for sub-block based prediction are described. In a representative aspect, a method for video processing includes partitioning a first component of a current video block into a first set of sub-blocks and partitioning a second component of the current video block into a second set of sub-blocks. A sub-block of the second component corresponds to one or more sub-blocks of the first component. The method also includes deriving, based on a color format of the current video block, motion vectors for a sub-block of the second component based on motion vectors for one or more corresponding sub-blocks of the first color component.

說明書

1.d MV″y=Shift (MV2y+MV3y, 1),

1.e MV*x=Shift (MV′x+MV″x, 1), and

1.f MV*y=Shift (MV′y+MV″y, 1).

In some embodiments, the calculation of MV* can be performed using the following operations:

2.a MV′x=Shift (MV0x+MV2x, 1),

2.b MV′y=Shift (MV0y+MV2y, 1),

2.c MV″x=Shift (MV1x+MV3x, 1),

2.d MV″y=Shift (MV1y+MV3y, 1),

2.e MV*x=Shift (MV′x+MV″x, 1), and

2.f MV*y=Shift (MV′y+MV″y, 1).

In some embodiments, the calculation of MV* can be performed using the following operations:

3.a MV′x=SignShift (MV0x+MV1x, 1),

3.b MV′y=SignShift (MV0y+MV1y, 1),

3.c MV″x=SignShift (MV2x+MV3x, 1),

3.d MV″y=SignShift (MV2y+MV3y, 1),

3.e MV*x=SignShift (MV′x+MV″x, 1), and

3.f MV*y=SignShift (MV′y+MV″y, 1).

In some embodiments, the calculation of MV* can be performed using the following operations:

4.a MV′x=SignShift (MV0x+MV2x, 1),

4.b MV′y=SignShift (MV0y+MV2y, 1),

權(quán)利要求

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