公开(公告)号：US12069244B2

公开(公告)日：2024-08-20

申请号：US17932595

申请日：2022-09-15

Applicant: QUALCOMM Incorporated

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

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

CPC classification number: H04N19/105 ,  H04N19/132 ,  H04N19/137 ,  H04N19/176

Abstract: A method of decoding video data includes determining a plurality of hypotheses of a current block based on a plurality of motion vectors. Each of the plurality of motion vectors is associated with one of the plurality of hypotheses, and each of the plurality of hypotheses is based on a set of samples in a reference picture having a motion vector that identifies a top-left sample of the set of samples. The method includes determining one or more neighboring samples in the same picture as the current block, for each of the plurality of hypotheses, determining respective correlation values between at least one sample of a respective hypothesis and at least one sample of the one or more neighboring samples, determining the motion vector for the current block based on the determined respective correlation values, and reconstructing the current block based on the determined motion vector.

公开(公告)号：US20240244197A1

公开(公告)日：2024-07-18

申请号：US18408928

申请日：2024-01-10

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/117 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70 ,  H04N19/80

CPC classification number: H04N19/117 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70 ,  H04N19/80

Abstract: A method of encoding or decoding video data includes determining a block vector for a current block of a current picture, the block vector identifying a fractional-pel position between reference samples in the current picture and having a fractional-pel resolution that is less than integer-pel resolution; generating a prediction block from reference samples in the current picture based on the fractional-pel position; and encoding or decoding the current block based on the prediction block.

公开(公告)号：US11924410B2

公开(公告)日：2024-03-05

申请号：US17662140

申请日：2022-05-05

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/105 ,  H04N19/176 ,  H04N19/51 ,  H04N19/593 ,  H04N19/70

CPC classification number: H04N19/105 ,  H04N19/176 ,  H04N19/51 ,  H04N19/593 ,  H04N19/70

Abstract: An example device for decoding video data includes one or more processors implemented in circuitry and configured to: generate an inter-prediction block for a current block of video data; generate an intra-prediction block for the current block of video data; generate a final prediction block for the current block of video data from the inter-prediction block and the intra-prediction block, including performing each of combined inter/intra prediction (CIIP) mode, overlapped block motion compensation (OBMC), and luma mapping with chroma scaling (LMCS) while generating the final prediction block; and decode the current block of video data using the final prediction block. To generate the final prediction block, the processors may perform LMCS on a first inter-prediction sub-block, combine the LMCS-mapped first inter-prediction sub-block with the intra-prediction block using CIIP, and perform OBMC between the first CIIP prediction block and a second inter-prediction sub-block.

公开(公告)号：US20240015333A1

公开(公告)日：2024-01-11

申请号：US18338886

申请日：2023-06-21

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/70 ,  H04N19/176

CPC classification number: H04N19/70 ,  H04N19/176

Abstract: A device for decoding video data comprises one or more processors configured to: obtain a syntax element from a bitstream that includes an encoded representation of the video data; determine, based on the syntax element, that a template-matching tool is enabled; based on the template-matching tool being enabled, applying the template-matching tool to generate a prediction block for a current coding unit (CU) of the video data; and reconstruct the current CU based on the prediction block for the current CU.

公开(公告)号：US20230308642A1

公开(公告)日：2023-09-28

申请号：US18325738

申请日：2023-05-30

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/51 ,  G06T9/00 ,  H04N19/189

CPC classification number: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/51 ,  G06T9/004 ,  H04N19/189

Abstract: An example device for decoding video data 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 reshape a pixel domain reference template block using a forward mapping function into a mapped domain reference template block and derive local illumination compensation (LIC) model parameters from the mapped domain reference template block and a mapped domain neighboring reconstruction template block. The one or more processors are configured to apply the LIC model parameters to motion-compensated prediction signals and decode the video data based on the application of the LIC model parameters.

公开(公告)号：US20220201315A1

公开(公告)日：2022-06-23

申请号：US17556142

申请日：2021-12-20

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/139 ,  H04N19/176 ,  H04N19/157 ,  H04N19/186 ,  H04N19/132 ,  H04N19/513

Abstract: Example devices and techniques for multi-pass decoder-side motion vector refinement (DMVR) are disclosed. An example device includes memory configured to store video data and one or more processors coupled to the memory. The one or more processors are configured to apply a multi-pass DMVR to a motion vector for a block of the video data to determine at least one refined motion vector and decode the block based on the at least one refined motion vector. The multi-pass DMVR includes a block-based first pass, a sub-block-based second pass, and a sub-block-based third pass.

公开(公告)号：US11350083B2

公开(公告)日：2022-05-31

申请号：US16847918

申请日：2020-04-14

Applicant: QUALCOMM Incorporated

Inventor： Yao-Jen Chang ,  Chun-Chi Chen ,  Wei-Jung Chien ,  Marta Karczewicz

IPC: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70

Abstract: A method of encoding and decoding video data, including coding a first syntax element that specifies a value used to derive a maximum number of intra block copy merging candidates, deriving the maximum number of intra block copy merging candidates based on the value of the first sytnax element, and coding a first block of video data using intra block copy mode according to the maximum number of intra block copy merging candidates.

公开(公告)号：US20210152825A1

公开(公告)日：2021-05-20

申请号：US17078710

申请日：2020-10-23

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/119 ,  H04N19/167 ,  G06F1/03

Abstract: An example device for decoding video data includes a memory configured to store the video data and one or more processors implemented in circuitry and coupled to the memory. The one or more processors are configured to determine a first distance index associated with a first geometric partition mode (GEO) angle for a first prediction unit (PU) of the video data to be 4. The one or more processors are configured to determine a first displacement value based on the first distance index, the first displacement value being indicative of a distance from a center of the first PU to a GEO split. The one or more processors are configured to decode the first PU based on the first GEO angle and the first displacement value. The first displacement value is half of a displacement value associated with a distance index of 2.

公开(公告)号：US20250119527A1

公开(公告)日：2025-04-10

申请号：US18882225

申请日：2024-09-11

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/105 ,  H04N19/157 ,  H04N19/176 ,  H04N19/52 ,  H04N19/70

Abstract: Example devices, methods, and computer-readable media are disclosed for decoding video data. An example method includes determining to decode a current block of the video data using a merge mode. The example method includes obtaining a flag from a bitstream. The example method includes determining, based on a value of the flag, to use a second merge list of two merge lists for the current block, wherein the second merge list is based on a first merge list of the two merge lists. The example method includes decoding the current block based on the second merge list.

公开(公告)号：US12212736B2

公开(公告)日：2025-01-28

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.