公开(公告)号：US11659207B2

公开(公告)日：2023-05-23

申请号：US17340727

申请日：2021-06-07

Applicant: QUALCOMM Incorporated

Inventor： Yong He ,  Yao-Jen Chang ,  Vadim Seregin ,  Muhammed Zeyd Coban

IPC: H04N19/70 ,  H04N19/172 ,  H04N19/184 ,  H04N19/105

CPC classification number: H04N19/70 ,  H04N19/105 ,  H04N19/172 ,  H04N19/184

Abstract: An example method includes decoding, from a coded video bitstream, a first syntax element that specifies a constraint for a second syntax element that specifies whether subpicture information is present in the coded video bitstream and whether more than one subpicture is allowed to be present in the coded video bitstream; and decoding, based on the constraint specified by the first syntax element, the second syntax element.

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：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.

公开(公告)号：US20210195179A1

公开(公告)日：2021-06-24

申请号：US17126914

申请日：2020-12-18

Applicant: QUALCOMM Incorporated

Inventor： Muhammed Zeyd Coban ,  Vadim Seregin ,  Yao-Jen Chang ,  Marta Karczewicz

IPC: H04N19/107 ,  H04N19/70 ,  H04N19/503 ,  H04N19/593 ,  H04N19/186 ,  H04N19/176 ,  H04N19/172

Abstract: An example method of processing video data includes parsing at least one of a first flag of the video data, in a picture header, indicative of whether a set of inter slice syntax elements are included in the picture header, and a second flag of the video data, in the picture header, indicative of whether a set of intra slice syntax elements are included in the picture header, selectively parsing at least one of the set of inter slice syntax elements, in the picture header, based on the first flag and the set of intra slice syntax elements, in the picture header, based on the second flag, and reconstructing the picture based on at least one of the set of inter slice syntax elements and the set of intra slice syntax elements.

公开(公告)号：US20210092449A1

公开(公告)日：2021-03-25

申请号：US17022253

申请日：2020-09-16

Applicant: QUALCOMM Incorporated

Inventor： Yao-Jen Chang ,  Vadim Seregin ,  Muhammed Zeyd Coban ,  Marta Karczewicz

IPC: H04N19/70 ,  H04N19/172

Abstract: An example device includes a memory and one or more processors implemented in circuitry and communicatively coupled to the memory. The one or more processors are configured to determine a value of a first syntax element indicative of a number of subpictures in a picture of video data. The one or more processors are configured to determine, for each subpicture among the subpictures in the picture, a value of a respective second syntax element indicative of an identification of a respective subpicture. The one or more processors are also configured to code the respective subpicture identified by the respective second syntax element.

公开(公告)号：US12250395B2

公开(公告)日：2025-03-11

申请号：US18057500

申请日：2022-11-21

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/503 ,  H04N19/105 ,  H04N19/109 ,  H04N19/132 ,  H04N19/159 ,  H04N19/172 ,  H04N19/176

Abstract: A video encoder and video decoder may determine to enable or disable a template-based inter prediction technique based on whether reference picture resampling or weighted prediction are used. A video encoder and video decoder may determine that a reference picture resampling mode is enabled. determine not to apply a template-based inter prediction technique to the video data based on the reference picture resampling mode being enabled, and code the video data using inter prediction without applying the template-based inter prediction technique.

公开(公告)号：US20240297981A1

公开(公告)日：2024-09-05

申请号：US18442740

申请日：2024-02-15

Applicant: QUALCOMM Incorporated

Inventor： Po-Han Lin ,  Jian-Liang Lin ,  Bappaditya Ray ,  Yao-Jen Chang ,  Han Huang ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/105 ,  H04N19/147 ,  H04N19/176

CPC classification number: H04N19/105 ,  H04N19/147 ,  H04N19/176

Abstract: A method of encoding or decoding video data includes constructing a template matching candidate list for a current block of the video data based on a plurality of template patterns; and encoding or decoding the current block based on the template matching candidate list.

公开(公告)号：US11863752B2

公开(公告)日：2024-01-02

申请号：US17456080

申请日：2021-11-22

Applicant: QUALCOMM Incorporated

Inventor： Yao-Jen Chang ,  Marta Karczewicz

IPC: H04N19/105 ,  H04N19/593 ,  H04N19/13 ,  H04N19/176 ,  H04N19/70 ,  H04N19/159

CPC classification number: H04N19/13 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/70

Abstract: A video coder may code a block of video data using an intra prediction mode determined from a most probable mode list. The video coder may construct a general most probable mode list containing N entries, wherein the N entries of the general most probable mode list are intra prediction modes, and wherein a planar mode is an ordinal first entry in the general most probable mode list, construct a primary most probable mode list from a first Np entries in the general most probable mode list, where Np is less than N, and construct a secondary most probable mode list from a remaining (N−Np) entries in the general most probable mode list. The video coder may then determine a current intra prediction mode for a current block of video data using the primary most probable mode list or the secondary most probable mode list.

公开(公告)号：US11716488B2

公开(公告)日：2023-08-01

申请号：US17022253

申请日：2020-09-16

Applicant: QUALCOMM Incorporated

Inventor： Yao-Jen Chang ,  Vadim Seregin ,  Muhammed Zeyd Coban ,  Marta Karczewicz

IPC: H04N19/70 ,  H04N19/172

CPC classification number: H04N19/70 ,  H04N19/172

Abstract: An example device includes a memory and one or more processors implemented in circuitry and communicatively coupled to the memory. The one or more processors are configured to determine a value of a first syntax element indicative of a number of subpictures in a picture of video data. The one or more processors are configured to determine, for each subpicture among the subpictures in the picture, a value of a respective second syntax element indicative of an identification of a respective subpicture. The one or more processors are also configured to code the respective subpicture identified by the respective second syntax element.

公开(公告)号：US11490099B2

公开(公告)日：2022-11-01

申请号：US17125225

申请日：2020-12-17

Applicant: QUALCOMM Incorporated

Inventor： Yao-Jen Chang ,  Vadim Seregin ,  Muhammed Zeyd Coban

IPC: H04N19/187 ,  H04N19/176 ,  H04N19/172 ,  H04N19/70 ,  H04N19/51 ,  H04N19/137

Abstract: A video decoder can be configured to determine that a first subpicture of a current picture has associated scaling parameters; receive the associated scaling parameters for the first subpicture of the current picture in response to determining that the first subpicture of the current picture has the associated scaling parameters; determine motion information, for a block of the first subpicture of the current picture, that identifies a subpicture of a reference picture; locate a prediction block for the block of the first subpicture of the current picture in the subpicture of the reference picture; and scale the prediction block based on the associated scaling parameters for the first subpicture of the current picture.