Sub-block MV inheritance between color components
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.
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wherein off and s are integers, and wherein >> represents a shift operation. The method 1300 or 1400 also includes applying a factor to the intermediate set of motion vectors to obtain the derived motion vectors, wherein the factor is associated with the color format.
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