Shumaker & Sieffert, P.A.
Inter prediction refinement based on bi-directional optical flow (BIO)
A video decoder can be configured to determine that a block of video data is encoded using a bi-directional inter prediction mode; determine that the block of video data is encoded using a bi-directional optical flow (BIO) process; inter predict the block of video data according to the bi-directional inter prediction mode; perform the BIO process for the block, wherein performing the BIO process for the block comprises determining a single motion vector refinement for a group of pixels in the block, wherein the group of pixels comprises at least two pixels; refine the group of pixels based on the single motion vector refinement; and output a BIO refined predictive block of video data comprising the refined group of pixels.
QUALCOMM Incorporated
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Jianle Marta Hsiao-Chiang Wei-Jung Xiang Yi-Wen
Chen Karczewicz Chuang Chien Li Chen