Patent ID: 11909953
Assignee: BYTEDANCE INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 17:
18. A non-transitory computer-readable recording medium storing a bitstream of a video which is generated by a method performed by a video processing apparatus, wherein the method comprises:
deriving, for a current block of the video, at least one combined affine model using multiple original affine models with control point motion vectors, wherein each of the at least one combined affine model comprises a first set of control point motion vectors, wherein the multiple original affine models have multiple second sets of control point motion vectors, respectively, and wherein each control point motion vector in the first set of control point motion vectors is a function of corresponding control point motion vectors in each of the multiple second sets of control point motion vectors;
storing affine model parameters for the current block; and
generating the bitstream from the current block based on the affine model parameters,
wherein the affine model parameters are signaled from an encoder to a decoder,
wherein the affine model parameters are derived at least from motion vectors of control points of the current block, and
wherein the generating is performed without storing control point motion vectors of the current block.