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US 12,720,065 B2Granted
Local motion extension in video coding
AssigneeGoogle Inc.
InventorsRachel Barker, Debargha Mukherjee, Jianle Chen
Life of this patent
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AssigneeGoogle Inc.
InventorsRachel Barker, Debargha Mukherjee, Jianle Chen
Estimating the term…
A warp model is determined for a block to be coded by using local motion extension. Motion for an adjacent block is extended locally into the block to determine motion for predicting the block. A motion model used for inter-prediction of an adjacent block that shares at least a portion of a boundary with a current block to be predicted is determined. The motion model is a first translational motion vector or a first warp model. A second translational motion vector for inter-prediction of the current block is determined. A second warp model for the inter-prediction of the current block is determined using the motion model and the second translational motion vector. An inter-prediction process for the current block is performed using the second warp model. For example, the interprediction process may include determining a prediction block for encoding or decoding the current block.
An apparatus, comprising:
A method, comprising:
A non-transitory, computer-readable medium storing an encoded bitstream, wherein the encoded bitstream comprises compressed residual block data corresponding to a current block of a frame encoded using a warp model, a motion model used for inter-prediction of an adjacent block that shares at least a portion of a boundary with the current block within the frame, and a translational motion vector for inter-prediction of the current block, wherein the warp model used for the inter-prediction of the current block is generated using the motion model and the translational motion vector and according to a constraint applied along a column of pixels of the adjacent block along the at least the portion of the boundary to maintain per-pixel motion vector continuity across the at least the portion of the boundary, wherein the non-transitory, computer-readable medium further stores instructions to configure a decoder to decode the encoded bitstream.
Dependencies are inferred from the claim text.