公开(公告)号：US20250159181A1

公开(公告)日：2025-05-15

申请号：US19022675

申请日：2025-01-15

Applicant: InterDigital VC Holdings, Inc.

Inventor： Saurav BBANDYOPADHYAY ,  Xiaoyu XIU ,  Yuwen HE

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/176 ,  H04N19/186

Abstract: Methods and apparatuses for encoding and decoding video data. Techniques disclosed comprise obtaining a linear model used to encode or to decode a video block of the video data. The linear model is obtained by computing a parameter of the linear model as a function of a minimum chroma value and a maximum chroma value and as a function of a reciprocal of a difference between a minimum luma value and a maximum luma value, wherein the reciprocal is derived from a single look up table including values for determining least significant bits.

公开(公告)号：US20250039435A1

公开(公告)日：2025-01-30

申请号：US18911319

申请日：2024-10-10

Applicant: InterDigital VC Holdings, Inc.

Inventor： Jiancong LUO ,  Yuwen HE

IPC: H04N19/52 ,  H04N19/105 ,  H04N19/132 ,  H04N19/139 ,  H04N19/167 ,  H04N19/176 ,  H04N19/55

Abstract: Method, apparatus and systems are disclosed. In one embodiment, a method of decoding includes obtaining a sub-block based motion prediction signal for a current block of the video; obtaining one or more spatial gradients of the sub-block based motion prediction signal or one or more motion vector difference values; obtaining a refinement signal for the current block based on the one or more obtained spatial gradients or the one or more obtained motion vector difference values; obtaining a refined motion prediction signal for the current block based on the sub-block based motion prediction signal and the refinement signal; and decoding the current block based on the refined motion prediction signal.