公开(公告)号：US11172214B2

公开(公告)日：2021-11-09

申请号：US16721204

申请日：2019-12-19

Applicant: QUALCOMM Incorporated

Inventor： Hongtao Wang ,  Yu Han ,  Vadim Seregin ,  Cheng-Teh Hsieh ,  Wei-Jung Chien ,  Marta Karczewicz

IPC: H04N19/436 ,  H04N19/119 ,  H04N19/139 ,  H04N19/176 ,  H04N19/172

Abstract: A video coder may determine a partitioning of a current picture of the video data into a plurality of partition blocks. The video coder may determine a plurality of processing areas in a unit in the current picture having sizes, where an average size of all of the plurality of processing areas in the unit is greater than or equal to a parameter N, and where determining the plurality of processing areas in the unit includes defining a processing area of the plurality of processing areas that has a size that fits two or more adjacent partition blocks of the plurality of adjacent blocks. The video coder may independently code coding units (CUs) within the processing area having the merged two or more adjacent partition blocks.

公开(公告)号：US11172200B2

公开(公告)日：2021-11-09

申请号：US16893200

申请日：2020-06-04

Applicant: QUALCOMM Incorporated

Inventor： Marta Karczewicz ,  Yu Han ,  Muhammed Zeyd Coban ,  Yung-Hsuan Chao ,  Hongtao Wang

IPC: H04N19/124 ,  H04N19/70 ,  H04N19/91 ,  H04N19/176 ,  H04N19/159

Abstract: An example video decoder is configured to decode a first value for a first syntax element of a current block of video data, the first value indicating that the current block is encoded using an intra-prediction mode; after decoding the first value, decode a second value for a second syntax element of the current block, the second value indicating that the current block is encoded using intra mapping mode. In the intra mapping mode, the video decoder is configured to generate a prediction block for the current block using the intra-prediction mode and decode a residual block. To decode the residual block, the video decoder is configured to determine predictors for quantized residual values of the residual block and map decoded mapping values to the quantized residual values using the predictors. The video decoder combines the prediction block with the residual block to decode the current block.

公开(公告)号：US11153577B2

公开(公告)日：2021-10-19

申请号：US17066405

申请日：2020-10-08

Applicant: QUALCOMM Incorporated

Inventor： Marta Karczewicz ,  Hongtao Wang ,  Muhammed Zeyd Coban

IPC: H04N19/176 ,  H04N19/184 ,  H04N19/70

Abstract: Embodiments are directed to systems and methods of using a Rice code in video coding. In one embodiment includes a method of encoding or decoding video data, e.g., on a video encoder or decoder. In particular, embodiments are directed to determining a Rice parameter for encoding or decoding syntax elements related to coefficient levels.

公开(公告)号：US20210051332A1

公开(公告)日：2021-02-18

申请号：US16991305

申请日：2020-08-12

Applicant: QUALCOMM Incorporated

Inventor： Marta Karczewicz ,  Yung-Hsuan Chao ,  Muhammed Zeyd Coban ,  Hongtao Wang

IPC: H04N19/157 ,  H04N19/176 ,  H04N19/122 ,  H04N19/124 ,  H04N19/463 ,  H04N19/132

Abstract: A method of decoding video data includes receiving a value indicating that a lossless mode is enabled for a block of the video data and, in response to determining that the value indicates that the lossless mode is enabled for the block of the video data, determining a maximum size for a lossless-coded transform block of the block of the video data is set to a maximum scanning size of the non-lossless coding block. The method further includes inverse scanning residual values for the block of the video data based on the maximum size for the lossless-coded transform block to generate a residual block for the block of the video data and reconstructing the block of the video data based on the residual block.

公开(公告)号：US20210006794A1

公开(公告)日：2021-01-07

申请号：US16917051

申请日：2020-06-30

Applicant: QUALCOMM Incorporated

Inventor： Marta Karczewicz ,  Yung-Hsuan Chao ,  Hongtao Wang ,  Muhammed Zeyd Coban

IPC: H04N19/126 ,  H04N19/70 ,  H04N19/182 ,  H04N19/103 ,  H04N19/60 ,  H04N19/136

Abstract: A video encoder derives a minimum allowed base quantization parameter for video data based on an input bitdepth of the video data, determines a base quantization parameter for a block of the video data based on the minimum allowed base quantization parameter, and quantizes the block of video data based on the base quantization parameter. In a reciprocal fashion, a video decoder derives a minimum allowed base quantization parameter for the video data based on an input bitdepth of the video data, determines a base quantization parameter for a block of the video data based on the minimum allowed base quantization parameter, and inverse quantizes the block of video data based on the base quantization parameter.

公开(公告)号：US20200296390A1

公开(公告)日：2020-09-17

申请号：US16816107

申请日：2020-03-11

Applicant: QUALCOMM Incorporated

Inventor： Yung-Hsuan Chao ,  Muhammed Zeyd Coban ,  Hongtao Wang ,  Marta Karczewicz

IPC: H04N19/186 ,  H04N19/176 ,  H04N19/70 ,  H04N19/50 ,  H04N19/61

Abstract: A video decoder configured to receive a first syntax element indicating if any coding group (CG) of a plurality of CGs includes at least one non-zero coefficient, wherein the plurality of CGs includes a luma CG and at least one chroma CG; in response to the first syntax element indicating that a CG of a plurality of CGs includes at least one non-zero coefficient, receive, for each CG of the plurality of CGs, a flag indicating if a corresponding CG of the plurality of CGs includes at least one non-zero coefficient; and for a CG with a corresponding flag indicating that the CG includes at least one non-zero coefficient, receive additional syntax indicating values for coefficients of the CG.

公开(公告)号：US20200260107A1

公开(公告)日：2020-08-13

申请号：US16789197

申请日：2020-02-12

Applicant: QUALCOMM Incorporated

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

IPC: H04N19/52 ,  H04N19/159 ,  H04N19/176 ,  H04N19/96 ,  H04N19/563

Abstract: An example device for coding video data includes a memory configured to store video data; and one or more processors implemented in circuitry and configured to: determine that a current block of a current picture of video data is to be predicted using intra-block copy (IBC) mode; determine up to N reference units that are available for use as reference to predict the current block using IBC mode, N being an integer value less than a total number of previously coded reference units of the current picture; generate a prediction block for the current block using one or more of the N reference units according to IBC mode; and code the current block using the prediction block. The current block may be a current coding unit (CU), and the reference units may be previously coded coding tree units (CTUs) in a row of CTUs including the current CU.

公开(公告)号：US20240236314A1

公开(公告)日：2024-07-11

申请号：US18404658

申请日：2024-01-04

Applicant: QUALCOMM Incorporated

Inventor： Hongtao Wang ,  Bappaditya Ray ,  Chun-Chi Chen ,  Vadim Seregin ,  Marta Karczewicz ,  Muhammed Zeyd Coban

IPC: H04N19/117 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/513

CPC classification number: H04N19/117 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/521

Abstract: A video decoder may be configured to determine a reference block for a current block of a current picture of video data, wherein the reference block is in the current picture; determine a prediction block based on the reference block; determine whether to apply filtering to the prediction block; based on determining that the filtering is to be applied to the prediction block, compare a template of the reference block to a template of the current block and filter the prediction block based on the comparing of the template of the reference block to the template of the current block to determine a filtered prediction block; decode the current block based on the filtered prediction block to determine a decoded version of the current block; and output a decoded picture of the video data comprising the decoded version of the current block.

公开(公告)号：US20240098257A1

公开(公告)日：2024-03-21

申请号：US18461255

申请日：2023-09-05

Applicant: QUALCOMM Incorporated

Inventor： Hongtao Wang ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/11 ,  H04N19/176 ,  H04N19/593

CPC classification number: H04N19/11 ,  H04N19/176 ,  H04N19/593

Abstract: A video decoder may be configured to determine that a block of video data is encoded using an intra prediction process that utilizes multiple intra prediction predictors; determine a set of reference lines for the intra prediction process; determine a first set of intra prediction predictors based on the set of reference lines; determine a second set of intra prediction predictors based on the set of reference lines; generate a fusion of predictors from the first set of intra prediction predictors and the second set of intra prediction predictors; and decode the block of video data using the fusion of predictors.

公开(公告)号：US11863787B2

公开(公告)日：2024-01-02

申请号：US16905100

申请日：2020-06-18

Applicant: QUALCOMM Incorporated

Inventor： Yu Han ,  Muhammed Zeyd Coban ,  Hongtao Wang ,  Wei-Jung Chien ,  Marta Karczewicz

IPC: H04N19/60 ,  H04N19/176 ,  H04N19/70

CPC classification number: H04N19/60 ,  H04N19/176 ,  H04N19/70

Abstract: A device for decoding video data can be configured to receive a syntax element indicating a maximum block size for a transform skip mode; determine a maximum block size for a block-based delta pulse code modulation (BDPCM) mode based on the syntax element; and decode block of video data based on the determined maximum block size for the BDPCM mode.