Adaptive control point selection for video coding based on AFFINE MOTION model

摘要

Systems, methods and means for motion vector clipping are disclosed when affine motion mode is enabled for a video block. The video coding device may determine that the affine mode for the video block is enabled. The video coding device may determine a plurality of control point affine motion vectors associated with the video block. The video coding device may store a plurality of clipped control point affine motion vectors for motion vector prediction of neighboring control point affine motion vectors. The video coding device may derive a subblock motion vector associated with a subblock of a video block, clip the derived subblock motion vector, and store this for spatial motion vector prediction or temporal motion vector prediction. For example, the video coding device may clip a subblock motion vector derived based on a motion field range that may be based on a bit depth value.