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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

In yet another representative aspect, a video encoder or a video decoder apparatus may implement a method as described herein.

The above and other aspects and features of the disclosed technology are described in greater detail in the drawings, the description and the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows an example of sub-block based prediction.

FIG. 2 shows an example of a simplified affine motion model.

FIG. 3 shows an example of an affine motion vector field (MVF) per sub-block.

FIG. 4 shows an example of motion prediction using the alternative temporal motion vector prediction (ATMVP) algorithm for a coding unit (CU).

FIG. 5 shows an example of one CU with four sub-blocks and neighboring blocks.

FIG. 6 shows an example of an optical flow trajectory used by the bi-directional optical flow (BIO) algorithm.

FIG. 7 shows an example of bilateral matching in the frame-rate up conversion (FRUC) algorithm.

FIG. 8 shows an example of template matching in the FRUC algorithm.

FIG. 9 shows an example of unilateral Motion Estimation (ME) in the FRUC method.

權(quán)利要求

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