公开(公告)号：US11025947B2

公开(公告)日：2021-06-01

申请号：US16697119

申请日：2019-11-26

Applicant: MEDIATEK INC.

Inventor： Yung-Chang Chang ,  Chia-Yun Cheng ,  Cheng-Han Li ,  Hong-Cheng Lin ,  Chi-Hung Chen

IPC: H04N19/52 ,  H04N19/119 ,  H04N19/176

Abstract: A motion vector (MV) projection method includes generating motion field motion vectors (MFMVs) for a first portion of a current frame by applying MV projection to MVs of a portion of each of reference frames and storing the MFMVs of the first portion of the current frame into an MFMV buffer, and generating MFMVs for a second portion of the current frame by applying MV projection to MVs of a portion of each of the reference frames and storing the MFMVs of the second portion of the current frame into the MFMV buffer. The second portion does not overlap the first portion. Before generating the MFMVs for the second portion of the current frame is done, at least one of the MFMVs of the first portion is read from the MFMV buffer and involved in motion vector determination of at least one coding block included in the first portion.

公开(公告)号：US11616970B1

公开(公告)日：2023-03-28

申请号：US17584313

申请日：2022-01-25

Applicant: MEDIATEK INC.

Inventor： Chi-Hung Chen ,  Cheng-Han Li ,  Hong-Cheng Lin

IPC: H04N19/513 ,  H04N19/139 ,  H04N19/176 ,  H04N19/184 ,  H04N19/44 ,  H04N19/433 ,  H04N19/423

Abstract: A motion vector refinement apparatus includes a first storage device, a motion vector predictor (MVP) derivation circuit, and a decoder side motion vector refinement (DMVR) circuit. The MVP derivation circuit derives a first MVP for a current block, stores the first MVP into the first storage device, and performs a new task. The DMVR circuit performs a DMVR operation to derive a first motion vector difference (MVD) for the first MVP. The MVP derivation circuit starts performing the new task before the DMVR circuit finishes deriving the first MVD for the first MVP.

公开(公告)号：US20200177909A1

公开(公告)日：2020-06-04

申请号：US16697119

申请日：2019-11-26

Applicant: MEDIATEK INC.

Inventor： Yung-Chang Chang ,  Chia-Yun Cheng ,  Cheng-Han Li ,  Hong-Cheng Lin ,  Chi-Hung Chen

IPC: H04N19/52 ,  H04N19/176 ,  H04N19/119

Abstract: A motion vector (MV) projection method includes generating motion field motion vectors (MFMVs) for a first portion of a current frame by applying MV projection to MVs of a portion of each of reference frames and storing the MFMVs of the first portion of the current frame into an MFMV buffer, and generating MFMVs for a second portion of the current frame by applying MV projection to MVs of a portion of each of the reference frames and storing the MFMVs of the second portion of the current frame into the MFMV buffer. The second portion does not overlap the first portion. Before generating the MFMVs for the second portion of the current frame is done, at least one of the MFMVs of the first portion is read from the MFMV buffer and involved in motion vector determination of at least one coding block included in the first portion.