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.
說(shuō)明書(shū)
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?I(k)/?t+vx?I(k)/?x+vy?I(k)/?y=0.??Eq. (2)
Combining this optical flow equation with Hermite interpolation for the motion trajectory of each sample results in a unique third-order polynomial that matches both the function values I(k) and ?I(k)/?x, ?I(k)/?y derivatives at the ends. The value of this polynomial at t=0 is the BIO prediction: preBIO=?·(I(0)+I(1)+vX/2·(τ1?I(1)/?x?τ0?I(0)/?x)+vy/2·(τ1?I(1)/?y?τ0?I(0)/?y)).??Eq. (3)
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