公开(公告)号：US20250047884A1

公开(公告)日：2025-02-06

申请号：US18365854

申请日：2023-08-04

Applicant: QUALCOMM Incorporated

Inventor： Cheng-Teh Hsieh ,  Han Huang ,  Chun-Chi Chen ,  Marta Karczewicz

IPC: H04N19/44 ,  H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/70

Abstract: A video decoder may be configured to receive a block of video data that was encoded using a coding mode that includes a search process in one or more reference frames. The video decoder may prefetch reference samples in a fixed search region of at least one reference frame of the one or more reference frames, and decode the block of video data using the coding mode, including performing the search process for the coding mode using the prefetched reference samples.

公开(公告)号：US20250016326A1

公开(公告)日：2025-01-09

申请号：US18741129

申请日：2024-06-12

Applicant: QUALCOMM Incorporated

Inventor： Zhi Zhang ,  Chun-Chi Chen ,  Han Huang ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/137 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/70

Abstract: A video decoder can be configured to determine that a current block of the video data is coded in a bi-prediction inter mode; receive a first syntax element identifying a motion vector predictor from a first candidate list of motion vector predictors; receive a second syntax element identifying a motion vector difference; determine a first motion vector for the current block based on the motion vector predictor and the motion vector difference; determine a second motion vector for the current block from a second list of candidate motion vector predictors based on bilateral matching; and determine a prediction block for the current block using the first motion vector and the second motion vector.

公开(公告)号：US20240297987A1

公开(公告)日：2024-09-05

申请号：US18437485

申请日：2024-02-09

Applicant: QUALCOMM Incorporated

Inventor： Chun-Chi Chen ,  Bappaditya Ray ,  Hongtao Wang ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/11 ,  H04N19/105 ,  H04N19/13 ,  H04N19/157 ,  H04N19/176 ,  H04N19/70

CPC classification number: H04N19/11 ,  H04N19/105 ,  H04N19/13 ,  H04N19/157 ,  H04N19/176 ,  H04N19/70

Abstract: Devices and techniques are disclosed for coding video data. An example device includes one or more memories configured to store the video data and one or more processors coupled to the one or more memories. The one or more processors are configured to determine to code a first block of the video data using intra block copy merge mode with block vector differences (IBC-MBVD). The one or more processors are configured to process a syntax element indicative of whether to use IBC-MBVD with fractional-pel offsets or to use IBC-MBVD with integer-pel offsets. The one or more processors are configured to code the first block based on a determination of whether to use IBC-MBVD with fractional-pel offsets or IBC-MBVD with integer-pel offsets.

公开(公告)号：US11895321B2

公开(公告)日：2024-02-06

申请号：US17704689

申请日：2022-03-25

Applicant: QUALCOMM Incorporated

Inventor： Yan Zhang ,  Zhi Zhang ,  Vadim Seregin ,  Marta Karczewicz ,  Chun-Chi Chen

IPC: H04N19/52 ,  H04N19/70 ,  H04N19/105 ,  H04N19/55 ,  H04N19/176

CPC classification number: H04N19/52 ,  H04N19/105 ,  H04N19/55 ,  H04N19/70 ,  H04N19/176

Abstract: An example device includes memory configured to store the video data and one or more processors implemented in circuitry and communicatively coupled to the memory. The one or more processors are configured to determine at least one of a temporal candidate or a history-based candidate and determine at least one non-adjacent candidate, wherein the at least one non-adjacent candidate is from a unit that is not adjacent to a current prediction unit (PU). The one or more processors are configured to determine an advanced motion vector predictor (AMVP) candidate list including the at least one of the temporal candidate or the history-based candidate and the at least one non-adjacent candidate. The at least one non-adjacent candidate is added to the AMVP candidate list after the temporal candidate or before the history-based candidate. The one or more processors are configured to code the current PU based on the AMVP candidate list.

公开(公告)号：US20230370605A1

公开(公告)日：2023-11-16

申请号：US18305807

申请日：2023-04-24

Applicant: QUALCOMM Incorporated

Inventor： Chun-Chi Chen ,  Han Huang ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/137 ,  H04N19/105 ,  H04N19/176 ,  H04N19/70

CPC classification number: H04N19/137 ,  H04N19/105 ,  H04N19/176 ,  H04N19/70

Abstract: An example device for decoding video data includes one or more processors configured to determine merge mode information for a current block, the merge mode information indicating that motion information for a current block is to be predicted using a first predictor motion vector and a second predictor motion vector; determine a first motion vector difference (MVD) for the first predictor motion vector and a second MVD for the second predictor motion vector, the second MVD being different than the first MVD; form a first motion vector equaling a combination of the first motion vector predictor and the first MVD; form a second motion vector equaling a combination of the second motion vector predictor and the second MVD; generate a prediction block using the first motion vector and the second motion vector; and decode the current block using the prediction block.

公开(公告)号：US20230328257A1

公开(公告)日：2023-10-12

申请号：US18194013

申请日：2023-03-31

Applicant: QUALCOMM Incorporated

Inventor： Zhi Zhang ,  Han Huang ,  Yao-Jen Chang ,  Chun-Chi Chen ,  Yan Zhang ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/159 ,  H04N19/563 ,  H04N19/52 ,  H04N19/176 ,  H04N19/14

CPC classification number: H04N19/159 ,  H04N19/563 ,  H04N19/52 ,  H04N19/176 ,  H04N19/14

Abstract: A device for decoding video data includes a memory configured to store video data; and one or more processors implemented in circuitry and configured to: determine that a boundary block of a picture of the video data is bi-directional inter-predicted using a first motion vector and a second motion vector, the boundary block having an edge that touches an edge of the picture; decode the picture, including decoding the boundary block; form a first intermediate padding block using the first motion vector; form a second intermediate padding block using the second motion vector; form a padding block using the first intermediate padding block and the second intermediate padding block; and assign padding values of the padding block to a padding region of the picture neighboring the boundary block on an opposite side of the edge of the picture.

公开(公告)号：US20230231992A1

公开(公告)日：2023-07-20

申请号：US18068767

申请日：2022-12-20

Applicant: QUALCOMM Incorporated

Inventor： Chun-Chi Chen ,  Han Huang ,  Vadim Seregin ,  Marta Karczewicz

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

CPC classification number: H04N19/105 ,  H04N19/132 ,  H04N19/176

Abstract: A method of encoding or decoding video data includes determining that geometric partition mode is enabled for a current block of the video data, the geometric partition mode comprising a plurality of split modes that each defines an edge for partitioning; for each split mode among at least two of the plurality of split modes, determining a respective cost associated with a respective split mode; constructing, based on the respective costs associated with the respective split modes, a mapping list including index values respectively associated with values indicative of the respective split modes, where a lower index value is associated with a first split mode having a lower cost than a second split mode with a higher index value; determining a split mode amongst the plurality of split modes within the mapping list; and reconstructing a current block of the video data based on the split mode.

公开(公告)号：US11665339B2

公开(公告)日：2023-05-30

申请号：US17454555

申请日：2021-11-11

Applicant: QUALCOMM Incorporated

Inventor： Chun-Chi Chen ,  Wei-Jung Chien ,  Han Huang ,  Yao-Jen Chang ,  Kevin Pascal Andre Reuze ,  Marta Karczewicz

IPC: H04N7/12 ,  H04N19/105 ,  H04N19/137 ,  H04N19/176 ,  H04N19/30 ,  H04N19/46 ,  B23K20/12 ,  B23P15/00 ,  G11B33/14 ,  C22F1/04 ,  C21D9/00 ,  B23K101/36

CPC classification number: H04N19/105 ,  B23K20/127 ,  B23P15/00 ,  C21D9/0068 ,  C22F1/04 ,  G11B33/1406 ,  G11B33/1486 ,  H04N19/137 ,  H04N19/176 ,  H04N19/30 ,  H04N19/46 ,  B23K2101/36

Abstract: A video coder is configured to form, in a symmetric motion vector difference mode, a List 0 (L0) base vector using a L0 Advanced Motion Vector Prediction (AMVP) candidate list and a List 1 (L1) base vector using a L1 AMVP candidate list; determine a refined L0 motion vector and a refined L1 motion vector by performing a decoder-side motion vector refinement process that refines the L0 base vector and the L1 base vector; and use the refined L0 motion vector and the refined L1 motion vector to determine a prediction block for a current block of a current picture of the video data.

公开(公告)号：US11570442B2

公开(公告)日：2023-01-31

申请号：US16893052

申请日：2020-06-04

Applicant: QUALCOMM Incorporated

Inventor： Kevin Pascal Andre Reuze ,  Chun-Chi Chen ,  Wei-Jung Chien ,  Han Huang ,  Marta Karczewicz ,  Vadim Seregin

IPC: H04B1/66 ,  H04N19/137 ,  H04N19/119 ,  H04N19/176 ,  H04N19/132 ,  H04N19/159 ,  H04N19/105

Abstract: An example video coding device is configured to: code a first set of motion information for a current block of video data partitioned into a first partition and a second partition according to a non-rectangular partition mode, the first set of motion information referring to a reference picture list and being associated with the first partition; after coding the first set of motion information, code a second set of motion information for the current block referring to the reference picture list and that is associated with the second partition; in response to the first set of motion information and the second set of motion information both referring to the reference picture list, store the second set of motion information for the current block; and predict subsequent motion information of a subsequent block of the video data that neighbors the current block using the stored second set of motion information.

公开(公告)号：US20230007238A1

公开(公告)日：2023-01-05

申请号：US17809167

申请日：2022-06-27

Applicant: QUALCOMM Incorporated

Inventor： Chun-Chi Chen ,  Han Huang ,  Cheng-Teh Hsieh ,  Wei-Jung Chien ,  Zhi Zhang ,  Yao-Jen Chang ,  Yan Zhang ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/137 ,  H04N19/176

Abstract: A device for decoding video data includes a memory configured to store video data; and one or more processors implemented in circuitry and configured to: determine a deterministic bounding box from which to retrieve reference samples of reference pictures of video data for performing decoder-side motion vector derivation (DMVD) for a current block of the video data; derive a motion vector for the current block according to DMVD using the reference samples within the deterministic bounding box; form a prediction block using the motion vector; and decode the current block using the prediction block.