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Interframe predictive coding is invoked only when the motion between adjacent frames is modest and a simple motion compensation operation can significantly improve the compression performance.
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In this level, quarter-pixel motion compensation is replaced by half-pixel operations, it forms a saving mode with little quality decline while computation is saved.
Motion compensation algorithm in [7, 8] employs overlapped block motion compensation (OBMC) and in [9] utilizes adaptive overlapped block motion compensation (AOBMC) to alleviate block artifacts and have better visual quality than OBMC.
operation of motion estimation: followed by motion compensation.
MEMC stands for the operation of motion estimation, followed by motion compensation, while ITM_R for inverse tone mapping of residual.
After motion compensation, the second step is to apply a flattening operation to eliminate the curvature appearance of the frames.
The residual prediction operation described in [17, 18] is performed only after motion compensation in the high bit-depth layer.
In order to perform motion compensation, we need to assign a motion vector or filling process for every pixel.
Although, such MVs can be useful for the motion compensation in encoder, they include noise and should not be used for the global motion compensation and video stabilization operations.
Automated, fast and accurate motion compensation is therefore required.
Leaky motion compensation causes transmission errors to disappear quickly and smoothly.
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