公开(公告)号：US20210203988A1

公开(公告)日：2021-07-01

申请号：US17131192

申请日：2020-12-22

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/597 ,  H04N19/176 ,  H04N19/159 ,  H04N19/52 ,  H04N19/70 ,  H04N19/80

Abstract: A video decoder can be configured to obtain, from a picture parameter set (PPS) data structure of video data, a value for a wraparound offset; in response to determining that a block of the video data is encoded in an inter prediction mode, determine a motion vector for the block and a reference picture for the block; determine a horizontal wrap around position in the reference picture based on the value for the wraparound offset; and determine a prediction block for the block based on the horizontal wrap around position.

公开(公告)号：US20210195173A1

公开(公告)日：2021-06-24

申请号：US17125486

申请日：2020-12-17

Applicant: QUALCOMM Incorporated

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

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

Abstract: A video coder is configured to determine a reference block of a reference picture for prediction of a current block of a current picture using motion information and to generate a set of reference samples for the current block of the current picture. To generate the set of reference samples, the video coder is configured to perform reference sample clipping on the reference block of the reference picture based on a size of the reference picture. The video coder is further configured to generate a prediction block for the current block of the current picture based on the set of reference samples.

公开(公告)号：US20210092455A1

公开(公告)日：2021-03-25

申请号：US17029550

申请日：2020-09-23

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/70 ,  H04N19/96 ,  H04N19/172 ,  H04N19/136 ,  H04N19/176 ,  H04N19/119 ,  H04N19/174

Abstract: A video coder may code, in a picture parameter set (PPS), a syntax element indicative of a luma coding tree block size of coding tree units (CTUs) of a picture of video data to which the PPS is applicable. The video coder may further code the picture of the video data to which the PPS is applicable in accordance with the syntax element in the PPS.

公开(公告)号：US20200336735A1

公开(公告)日：2020-10-22

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 ,  H04N19/70 ,  H04N19/46 ,  H04N19/176

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：US20250119536A1

公开(公告)日：2025-04-10

申请号：US18891043

申请日：2024-09-20

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/11 ,  H04N19/156 ,  H04N19/159 ,  H04N19/174 ,  H04N19/176 ,  H04N19/186 ,  H04N19/593 ,  H04N19/70

Abstract: A video decoder may be configured to receive a first instance of a flag for a first block, with a first value for the flag indicating that a cross-component prediction (CCP) mode is derived without signaling and a second value for the flag indicating that the CCP mode is signaled; in response to determining that the first instance of the flag is set to the first value, derive a first CCP mode for the first block; determine a first predicted chroma block for the first block using the first CCP mode; determine a decoded version of the first block based on the first predicted chroma block; and output a picture of decoded video data that includes the decoded version of the first block.

公开(公告)号：US20250008085A1

公开(公告)日：2025-01-02

申请号：US18755330

申请日：2024-06-26

Applicant: QUALCOMM Incorporated

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

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

Abstract: A method of encoding or decoding video data includes storing a block vector (BV) for a current block in a history BV list for encoding or decoding a subsequent block, wherein the current block is encoded or decoded in intra temporal motion vector prediction (IntraTMP) mode, and wherein the history BV list includes BVs for blocks that do not neighbor the subsequent block; deriving a candidate list of BVs for the subsequent block based on BVs from the history BV list that includes the BV for the current block; and encoding or decoding the subsequent block based on the candidate list of BVs.

公开(公告)号：US20240397053A1

公开(公告)日：2024-11-28

申请号：US18671610

申请日：2024-05-22

Applicant: QUALCOMM Incorporated

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

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

Abstract: A device for decoding video data includes memory configured to store the video data and processing circuitry. The processing circuitry is configured to determine that a current block of the video data is inter-predicted in a combined inter-intra prediction (CIIP) mode or a geometric partitioning mode (GPM), determine that template matching is enabled for the current block, generate a motion vector for the current block based on template matching; determine a prediction block for the current block based on the motion vector in accordance with the CHIP mode or the GPM, and reconstruct the current block based on the prediction block.

公开(公告)号：US20240357079A1

公开(公告)日：2024-10-24

申请号：US18633182

申请日：2024-04-11

Applicant: QUALCOMM Incorporated

Inventor： Jian-Liang Lin ,  Po-Han Lin ,  Vadim Seregin ,  Marta Karczewicz ,  Yao-Jen Chang ,  Zhi Zhang

IPC: H04N19/105 ,  H04N19/174 ,  H04N19/176

CPC classification number: H04N19/105 ,  H04N19/174 ,  H04N19/176

Abstract: A method of encoding or decoding video data includes selecting a group of blocks based on probing samples determined from pixels that are proximate to the blocks in the group of blocks and current probing samples determined from pixels that are proximate to a current block; fusing the blocks in the group of blocks to generate a prediction signal; and encoding or decoding the current block based on the prediction signal.

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：US20230283770A1

公开(公告)日：2023-09-07

申请号：US18175282

申请日：2023-02-27

Applicant: QUALCOMM Incorporated

Inventor： Yao-Jen Chang ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/105 ,  H04N19/52 ,  H04N19/139 ,  H04N19/176

CPC classification number: H04N19/105 ,  H04N19/52 ,  H04N19/139 ,  H04N19/176

Abstract: A device for decoding video data can be configured to determine that a block is coded in an overlapped block motion compensation (OBMC) mode; determine a first prediction block for the block using a first motion vector for the block; determine a second prediction block for the block using a second motion vector, wherein the second motion is a motion vector of a neighboring block of the block; select an OBMC blending process from a plurality of available OBMC blending processes; blend the first prediction block and the second prediction block using the selected OBMC blending process to determine a blended block; and reconstruct the block using the blended block.