公开(公告)号：US11683517B2

公开(公告)日：2023-06-20

申请号：US17101687

申请日：2020-11-23

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/56 ,  H04N19/70 ,  H04N19/176 ,  H04N19/513

CPC classification number: H04N19/513 ,  H04N19/176 ,  H04N19/56 ,  H04N19/70

Abstract: A method of decoding video data may comprise decoding data from an encoded bitstream to generate motion vectors and performing a decoder-side motion vector refinement (DMVR) process on one or more of the motion vectors. Performing the DMVR process may include determining one or more characteristics of current video block being decoded and determining a search area for the DMVR process for the current video block based on the determined one or more characteristics of the current video block.

公开(公告)号：US11659197B2

公开(公告)日：2023-05-23

申请号：US17222380

申请日：2021-04-05

Applicant: QUALCOMM Incorporated

Inventor： Han Huang ,  Jianle Chen ,  Wei-Jung Chien ,  Marta Karczewicz

IPC: H04N19/52 ,  H04N19/70 ,  H04N19/176 ,  H04N19/132 ,  H04N19/46

CPC classification number: H04N19/52 ,  H04N19/132 ,  H04N19/176 ,  H04N19/46 ,  H04N19/70

Abstract: An example method includes encoding, in a video bitstream, a first syntax element specifying whether affine model based motion compensation is enabled; based on affine model based motion compensation being enabled, encoding, in the video bitstream, a second syntax element specifying a maximum number of subblock-based merging motion vector prediction candidates, wherein a value of the second syntax element is constrained based on a value other than a value of the first syntax element; and encoding a picture of the video data based on the maximum number of subblock-based merging motion vector prediction candidates.

公开(公告)号：US11616974B2

公开(公告)日：2023-03-28

申请号：US17509947

申请日：2021-10-25

Applicant: QUALCOMM Incorporated

Inventor： Yu Han ,  Wei-Jung Chien ,  Han Huang ,  Marta Karczewicz

IPC: H04N19/00 ,  H04N19/52 ,  H04N19/105 ,  H04N19/139 ,  H04N19/176 ,  H04N19/43 ,  H04N19/436 ,  H04N19/56 ,  H04N19/58 ,  H04N19/583

Abstract: A method of coding video data, including constructing a history-based motion vector prediction (HMVP) candidate history table that includes motion vector information of previously coded blocks that extend beyond adjacent neighboring blocks of a current block, constructing a motion vector predictor list, and adding one or more HMVP candidates from the HMVP candidate history table to the motion vector predictor list. Adding the one or more HMVP candidates from the HMVP candidate history table comprises comparing a first HMVP candidate in the HMVP candidate history table to two entries in the motion vector predictor list and no other entries, and adding the first HMVP candidate to the motion vector predictor list when the first HMVP candidate is different than both of the two entries in the motion vector predictor list. The method also includes coding the current block of video data using the motion vector predictor list.

公开(公告)号：US20220417500A1

公开(公告)日：2022-12-29

申请号：US17804687

申请日：2022-05-31

Applicant: QUALCOMM Incorporated

Inventor： Han Huang ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/105 ,  H04N19/176 ,  H04N19/70 ,  H04N19/503

Abstract: A video coder is configured to construct a merge candidate list of merge candidates, wherein the merge candidate list has N1 candidates, N1 being a positive integer value, reorder the merge candidates in the merge candidate list to create a reordered merge candidate list, reduce the reordered merge candidate list to create an output merge candidate list, wherein the output merge candidate list has N2 candidates, wherein N2 is less than N1, and code a block of video data using the output merge candidate list.

公开(公告)号：US20220329823A1

公开(公告)日：2022-10-13

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: H04N19/137 ,  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：US11425415B2

公开(公告)日：2022-08-23

申请号：US17195527

申请日：2021-03-08

Applicant: QUALCOMM Incorporated

Inventor： Han Huang ,  Wei-Jung Chien ,  Marta Karczewicz

IPC: H04N19/52 ,  H04N19/176 ,  H04N19/46 ,  H04N19/55

Abstract: A video encoder and video decoder are configured to encode and decode blocks of video data using affine motion prediction. Affine motion prediction may include predicting control point motion vectors using an affine advanced motion vector prediction (AMVP) motion vector predictor list. The video encoder and video decoder may be configured to construct the affine AMVP motion vector predictor list of candidate control point motion vectors for the block of video data, wherein the affine AMVP motion vector predictor list includes one or more affine motion vector predictors that have all control point motion vectors equal to a designated motion vector.

公开(公告)号：US11405619B2

公开(公告)日：2022-08-02

申请号：US17028517

申请日：2020-09-22

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/132 ,  H04N19/105 ,  H04N19/119 ,  H04N19/176 ,  G06F1/03

Abstract: A video decoder can be configured to determine, for a block of video data encoded in a geometric partition mode, an angle for the block for the geometric partition mode; determine a separation line displacement relative to a center of the block for the geometric partition mode; partition the block into first and second partitions based on the angle and the separation line displacement; determine first predictive samples for the block using a motion vector for the first partition and second predictive samples for the block using a motion vector for the second partition; determine a power-of-2 number based on the angle for the block; determine weighting values based on the power-of-2 number; perform a blending operation on the first predictive samples and the second predictive samples based on the weighting values to determine a prediction block for the block.

公开(公告)号：US20220201313A1

公开(公告)日：2022-06-23

申请号：US17645233

申请日：2021-12-20

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/137 ,  H04N19/119 ,  H04N19/154 ,  H04N19/132 ,  H04N19/176 ,  H04N19/46

Abstract: A method of decoding video data includes determining that bi-directional optical flow (BDOF) is enabled for a block of the video data; dividing the block into a plurality of sub-blocks based on the determination that BDOF is enabled for the block, determining, for each sub-block of one or more sub-blocks of the plurality of sub-blocks, respective distortion values, determining that one of per-pixel BDOF is performed or BDOF is bypassed for each sub-block of the one or more sub-blocks of the plurality of sub-blocks based on the respective distortion values, determining prediction samples for each sub-block of the one or more sub-blocks based on the determination of per-pixel BDOF being performed or BDOF being bypassed, and reconstructing the block based on the prediction samples.

公开(公告)号：US11310497B2

公开(公告)日：2022-04-19

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 ,  H04N19/176 ,  H04N19/159

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：US11202064B2

公开(公告)日：2021-12-14

申请号：US16909772

申请日：2020-06-23

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 ,  B23K101/36

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.