公开(公告)号：US11076169B2

公开(公告)日：2021-07-27

申请号：US15930790

申请日：2020-05-13

Applicant: QUALCOMM Incorporated

Inventor： Dmytro Rusanovskyy ,  Kevin Pascal Andre Reuze ,  Vadim Seregin ,  Wei-Jung Chien ,  Marta Karczewicz ,  Yan Zhang

IPC: H04N19/52 ,  H04N19/117 ,  H04N19/577 ,  H04N19/176

Abstract: A device for coding video data may determine whether a switchable interpolation filter (SIF) index value of a first motion vector (MV) component of a pairwise average motion vector predictor (MVP) is equal to a SIF index value of a second MV component of the pairwise average MVP. Based on the SIF index value of the first MV component being equal to the SIF index value of the second MV component, the device may set the SIF index of the pairwise average MVP to be equal to the SIF index of the first MV component. The device may code the video data based on the SIF index value of the pairwise average MVP.

公开(公告)号：US10588068B2

公开(公告)日：2020-03-10

申请号：US15762439

申请日：2015-12-29

Applicant: QUALCOMM INCORPORATED ,  Ling Xie ,  Shiau-He Tsai ,  Jie Mao ,  Yan Zhang ,  Huichun Chen ,  Shanshan Wang ,  Song Tian ,  Yong Xie

Inventor： Ling Xie ,  Shiau-He Tsai ,  Jie Mao ,  Yan Zhang ,  Huichun Chen ,  Shanshan Wang ,  Song Tian ,  Yong Xie

IPC: H04W36/00 ,  H04W36/30 ,  H04W48/20 ,  H04W48/16

Abstract: A user equipment (UE) expedites cell reselection. In one instance, the UE starts a reselection timer for reselecting to a neighbor cell when a signal quality of a serving cell is determined to fall below a first threshold. The UE then expedites reselecting to the neighbor cell based on a difference between the signal quality of the serving cell and the signal quality of the neighbor cell when the signal quality of the serving cell falls below a second threshold.

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.

公开(公告)号：US20240357080A1

公开(公告)日：2024-10-24

申请号：US18639557

申请日：2024-04-18

Applicant: QUALCOMM Incorporated

Inventor： Yan Zhang ,  Han Huang ,  Vadim Seregin ,  Marta Karczewicz

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

CPC classification number: H04N19/105 ,  H04N19/159 ,  H04N19/176

Abstract: A method of encoding or decoding video data includes determining, for a multiple hypothesis prediction (MHP) process, a plurality of prediction templates based on a plurality of weights; comparing the plurality of prediction templates to a current template of a current block; determining a weight from the plurality of weights based on the comparing of the plurality of prediction templates to the current template of the current block; determining one or more prediction hypotheses; determining a prediction signal for the current block based on the one or more prediction hypotheses and the weight; and encoding or decoding the current block based on the prediction signal.

公开(公告)号：US11936877B2

公开(公告)日：2024-03-19

申请号：US17715571

申请日：2022-04-07

Applicant: QUALCOMM Incorporated

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

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

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

Abstract: A video decoder can be configured to determine that a current block in a current picture of the video data is coded in an affine prediction mode; determine one or more control-point motion vectors (CPMVs) for the current block; identify an initial prediction block for the current block in a reference picture using the one or more CPMVs; determine a current template for the current block in the current picture; and determine an initial reference template for the initial prediction block in the reference picture; and perform a motion vector refinement process to determine a modified prediction block based on a comparison of the current template to the initial reference template.

公开(公告)号：US11785219B2

公开(公告)日：2023-10-10

申请号：US17223814

申请日：2021-04-06

Applicant: QUALCOMM Incorporated

Inventor： Dmytro Rusanovskyy ,  Jianle Chen ,  Yan Zhang ,  Marta Karczewicz

IPC: H04N19/13 ,  H04N19/91 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70

CPC classification number: H04N19/13 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70 ,  H04N19/91

Abstract: A method of decoding video data comprises determining, based on a color format of a picture of the video data, which context model from among a first context model and a second context model to use to determine a context increment for a syntax element that indicates a prefix of an x or y coordinate of a last significant transform coefficient of a color component of a block of the picture; and decoding a bin of the syntax element by applying Context Adaptive Binary Arithmetic Coding (CABAC) using a context determined based on the context increment for the syntax element.

公开(公告)号：US20230247216A1

公开(公告)日：2023-08-03

申请号：US18153949

申请日：2023-01-12

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/513 ,  H04N19/44

CPC classification number: H04N19/513 ,  H04N19/44

Abstract: An example device for decoding video data includes one or more processors implemented in circuitry and configured t: form first and second prediction blocks using first and second motion vectors and combine the first and second prediction blocks according to BDOF to form a final prediction block. For at least one sample location, the one or more processors are configured to determine that a first predictor for the at least one sample location is outside of a boundary of the first reference picture; determine that a second predictor for the at least one sample location is within a boundary of the second reference picture; set the first predictor equal to the second predictor; and determine a final BDOF value for a sample at the at least one sample location using the first predictor and the second predictor.

公开(公告)号：US20230079743A1

公开(公告)日：2023-03-16

申请号：US17823714

申请日：2022-08-31

Applicant: QUALCOMM Incorporated

Inventor： Han Huang ,  Yan Zhang ,  Vadim Seregin ,  Marta Karczewicz

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

Abstract: A method of decoding video data may comprise determining merge candidates for a block of video data and determining if a merge candidate of the merge candidates includes an additional inter prediction signal. If a merge candidate includes an additional inter prediction signal, the method may include disabling at least one decoder side motion vector derivation technique for use on a base prediction signal of the block of video data.

公开(公告)号：US11558616B2

公开(公告)日：2023-01-17

申请号：US17192335

申请日：2021-03-04

Applicant: QUALCOMM Incorporated

Inventor： Dmytro Rusanovskyy ,  Yan Zhang

IPC: H04N19/124 ,  H04N19/70 ,  H04N19/186

Abstract: An example device for processing video data includes memory configured to store the video data and one or more processors coupled to the memory. The one or more processors are configured to adjust a chroma dynamic range adjustment (DRA) scale value based on a luma DRA scale value and determine a chroma quantization parameter (QP) based on the luma adjusted chroma DRA scale value, wherein the chroma QP comprises an integer component and a fractional component. The one or more processors are configured to determine an integer chroma QP offset based on the integer component and determine a fractional chroma QP offset based on the fractional component. The one or more processors are configured to determine a DRA chroma scale adjustment value based on the integer chroma QP offset and the fractional chroma QP offset and process the video data based on the DRA chroma scale adjustment value.